How do you write 2350 in standard form?.
Answers
2350 in standard form is 2.350*10^3
Standard form refers to any number that can be expressed as a decimal number and falls within the range of 1.0 and 10.0 when multiplied by a power of 10. The conventional form of 123,000,000 is 1.23 108 because, if you look closely, 1.23 is a decimal number between 1.0 and 10.0. Given that you skipped over all those zeros, we'll give you a shorter version of the sentence instead: There are 4.543 billion years on Earth. you see how it is possible to read numbers in a more understandable manner To make mathematics easier for everyone to understand, write, and work with, mathematicians from all over the world resolved to settle on a set of standards for how to express mathematical ideas.
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Related Questions
What is the volume, in liters, of 0.250 moles of carbon monoxide at STP?
WRITE THE FORMULAS FOR THE COMPOUNDS, NOT JUST THE NAMES. INCLUDE UNITS!
Answers
Ka is writing a paper about the nutritional benefits of omega-3 fats. One source says overconsumption of these fats can lead to cardiac problems, which the source’s author has personally experienced. Ka has already confirmed that the article appears in a trusted publication, and the author uses logical, moral, and emotional arguments based on evidence. What is the best thing Ka can do next to determine the objectivity of the source?
determine whether the evidence cited reflects more than one side
contact the author directly to learn more about his personal experience
conduct an internet search for “cardiac problems + omega-3 fats”
contrast the article with others written by the same author on different topics
Answers
The best thing Ka can do next to determine the objectivity of the source is conduct an internet search for cardiac problems + omega-3 fats. Thus option C is correct.
What are cardiac problems?Cardiac problems are defined as the problems that occurs in heart and blood vassals of heart.
The common cardiac problems are
Erratic anginaA heart attack.A heart attack.Arrhythmia (improper heartbeats)Disease of the valvesElevated blood pressure.Congenital cardiac problems.Heart problems that run in families.A significant family of polyunsaturated fats is the omega-3 family.
Thus, the best thing Ka can do next to determine the objectivity of the source is conduct an internet search for cardiac problems + omega-3 fats. Thus option C is correct.
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Answer:
it is A.
Explanation:
determine whether the evidence cited reflects more than one side
what happens to the ammonia and hydrogen gases generated in common zinc carbon dry cell..?
Answers
Answer:
A zinc- carbon battery dry cell primary that delivers about 1.5 volts of direct current.
Explanation:
hydrogen gas escapes while retaining the aqueous electrotype.
When an organism eats food, energy becomes available for metabolic activities. In the process, some energy enters the environment as heat. According to the Law of Conservation of energy …a) energy which is given off as heat is not part of the total energy budget of the system b) some energy is lost; as no metabolic process is 100% efficient c) no energy is lost; the total amount of energy remains the samed) energy which is not immediately used by the organism cannot be stored and is lost
Answers
Answer
C) no energy is lost; the total amount of energy remains the same.
Explanation
The law of conservation of energy states that "The energy can neither be created nor destroyed - only converted from one form of energy to another." Therefore some energy will be used for metabolism while the other can be used for other properties and some can be stored.
Select the structure that corresponds
to the name:
decanoic acid
COOH
A.
B. CH3(CH2)7COOH
C. both
Answers
Answer:
b
Explanation:
Molecular formula of Decanoic Acid is C₁₀H₂₀O₂ therefore Option A is the right answer.
What is Decanoic Acid ?Decanoic Acid is a C10 , straight chain , saturated fatty acid . Its general formula is C₁₀H₂₀O₂ .
In the first option we can see a straight chain , saturated fatty acid and the molecular formula is also same as decanoic acid .
In second option the molecular formula is C₉H₁₈O₂ which is not same as Decanoic Acid.
Hence option A is the right answer.
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the ability of an atom in a covalent bond to attract shared electrons to itself is best quantified by its:_____.
Answers
This ability is best quantified by its electronegativity. Electronegativity is a measure of an atom's ability to attract a shared pair of electrons towards itself.
The higher the electronegativity, the more strongly an atom is able to attract the shared electrons, and the more polar the covalent bond is. Electronegativity is a measure of the ability of an atom to attract electrons to itself when bonded with another atom. It is calculated on a scale from 0 to 4, with 0 being the least electronegative and 4 being the most electronegative. A higher electronegativity value indicates that the atom is more likely to attract electrons to itself, while a lower electronegativity value indicates that it is less likely to do so. Electronegativity therefore can be used to determine how electrons in a covalent bond are distributed between two atoms.
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Which of the following is the amount of product that can be made by the initial quantities in a chemical reaction?
Excess reactant
Limiting reactant
Stoichiometric yield
Theoretical yield
Answers
Answer:
The amount of product that can be formed based on the limiting reactant is called the theoretical yield.
what should i do if there is more than 1 curve on a graph
Answers
Answer:
Image result for what should i do if there is more than 1 curve on a graph
In a multiple line graph, there are two or more lines in the graph connecting two or more sets of data points. The independent variable is listed along the horizontal, or x, axis and the quantity or value of the data is listed along the vertical, or y, axis. Lastly, the legend, or key, states what each line represents.
Explanation:
Can animals detect radio waves
Answers
Answer:
No.
Explanation:
No organism can detect X-rays or radio waves
Answer:
no
Explanation:
Many animals, including vampire bats and certain fish and snake species, are able to sense infrared radiation, but this only goes up to wavelengths of 1mm. Longer wavelengths carry much less energy and can't be detected without some kind of resonator to amplify the signal.
the strength of dipole interactions are mostly determined by what?
Answers
The strength of dipole interactions is mostly determined by the difference in electronegativity between atoms in a molecule.
Dipole interactions occur between polar molecules, which have a separation of electric charge resulting from a difference in electronegativity between the atoms that make up the molecule. Electronegativity is a measure of how strongly an atom attracts electrons towards itself in a covalent bond.
The greater the difference in electronegativity between the atoms in a molecule, the larger the dipole moment and the stronger the dipole-dipole interactions. This is because the partial positive and negative charges in a polar molecule are more pronounced when the electronegativity difference is higher, which leads to stronger attractions between the molecules.
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Calculate the approximate enthalpy change,ΔHrxn, for the combustion of methane:
CH4+2O2--> 2H2O+CO2
ΔHfor CH4 =1656 kJ/mol
ΔH for O2= 498 kJ/mol
ΔH for H2O= -928 kJ/mol
ΔH for CO2= -1472 kJ/mol
Answers
The approximate enthalpy change for the combustion of methane is -676 kJ/mol.
Enthalpy change of combustion is usually calculated from the enthalpies of formation of atoms of the reactants and products in the combustion reaction.
To calculate the enthalpy change (ΔHrxn) for the combustion of methane, we will use the following equation:
ΔHrxn = Σ ΔH(products) - Σ ΔH(reactants)
In this reaction, the products are 2 moles of H2O and 1 mole of CO2, and the reactants are 1 mole of CH4 and 2 moles of O2. Plugging in the given ΔH values, we have:
ΔHrxn = [(2 x -928) + (-1472)] - [(1656) + (2 x 498)]
ΔHrxn = (-1856 - 1472) - (1656 + 996)
ΔHrxn = -3328 - 2652
ΔHrxn = -676 kJ/mol
The enthalpy change for the combustion of methane is -676 kJ/mol.
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Please help How many moles of a gas sample are in 5.0 L container at 215 K and 342 kPa(The gas constant is 8.31 L kPa/mol K) Round your answer to one decimal place and enter the number only with no units.
Answers
Answer
1.0 mol
Explanation
Given:
Volume, V = 5.0 L
Temperature, T = 215 K
Pressure, P = 342 kPa
The gas constant, R = 8.31 L kPa/mol K
What to find:
The number of moles of the gas sample.
Step-step-solution:
The number of moles of the gas can be determine using the ideal gas equation formula:
\(PV=nRT\)Put the given values into the formula and calculate for n:
\(\begin{gathered} 342\times5.0=n\times8.31\times215 \\ 1710=1786.65n \\ \text{Divide both sides by 1786.65} \\ \frac{1710}{1786.65}=\frac{1786.65n}{1786.65} \\ n=0.9571\text{ mol} \\ To\text{ one decimal place,} \\ n=1.0\text{ mol} \end{gathered}\)The number of moles of the gas sample is 1.0 mol.
For a certain polyatomic ideal gas the value of its ideal gas constant is 0.123 kJ/(kg.K). Determine a) its molecular weight (W);
Answers
The molecular weight (W) of the polyatomic ideal gas is equal to the temperature (T) divided by the volume (V) calculated as 0.123 kJ/(K).
The molecular weight (W) of the polyatomic ideal gas can be determined using the ideal gas equation:
PV = mRT
where:
P = pressure of the gas (in this case, it is not given)
V = volume of the gas (in this case, it is not given)
m = mass of the gas (in kilograms)
R = ideal gas constant (0.123 kJ/(kg.K))
T = temperature of the gas (in Kelvin)
To calculate the molecular weight (W), we need to find the value of m. Since the pressure and volume are not provided, we can rearrange the ideal gas equation as follows:
m = PV / (RT)
Now, let's assume a hypothetical situation where we have 1 kg of the polyatomic ideal gas. In this case, the mass (m) would be equal to 1 kg.
Substituting the values into the equation:
m = (1 kg) * V / (0.123 kJ/(kg.K) * T)
Here, we can see that the units of kilograms (kg) cancel out, leaving us with:
1 = V / (0.123 kJ/(K))
To isolate V, we multiply both sides of the equation by 0.123 kJ/(K):
0.123 kJ/(K) = V
Now, we have the volume (V) in cubic meters. The molecular weight (W) can be calculated using Avogadro's law, which states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules.
To calculate the molecular weight (W), we need to determine the number of moles (n) of the gas. The number of moles can be found using the equation:
n = PV / (RT)
However, since the pressure and volume are not provided, we cannot calculate the number of moles directly. Instead, we can make use of the molar mass (M) of the gas, which is the mass of 1 mole of the gas.
The molar mass (M) is related to the molecular weight (W) as follows:
M = W / 1000
Since we assumed a mass of 1 kg earlier, the molar mass (M) can be calculated as:
M = (1 kg) / n
Substituting the value of n from the equation above:
M = (1 kg) / (PV / (RT))
M = RT / PV
Now, substituting the value of R (0.123 kJ/(kg.K)) and rearranging the equation:
M = (0.123 kJ/(kg.K)) * T / (0.123 kJ/(K) * V)
The units of kJ cancel out, leaving us with:
M = T / V
Using the value of V we calculated earlier (0.123 kJ/(K)), we can determine the molecular weight (W) of the polyatomic ideal gas.
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The decomposition of potassium chlorate, KClO3, is used as a source of oxygen in labs.
How many moles of potassium chlorate are needed to produce 6.83 moles of oxygen gas?
Answers
Reaction takes place is
2KClO3 --> 2KCl + 3O2
from above equation 2 moles of potassium chlorate is forming 3 moles of Oxygen gas.
now given 6.83 moles of oxygen and moles of potassium chlorate is missing,
consider x moles of potassium chlorate are needed to form 6.83 moles of oxygen
from above condition, .
3 》》》》2
x 》》》》6.83
3/x = 2/6.83
x = 3×6.83/2
x= 10.245
Answer- 10.245 moles of potassium chlorate are needed to produce 6.83 moles of oxygen gas.
if you have 10 grams of a substance that decays with a half-life of 14 days, then how much will you have after 70 days? responses 0.10 g 0.10 g 0.313 g 0.313 g 1.25 g 1.25 g 2.50 g
Answers
The half-life of a substance is the amount of time it takes for half of the substance to decay. In this case, the substance has a half-life of 14 days.
After 14 days, half of the substance will decay, leaving you with 5 grams.
After another 14 days (28 days total), half of the remaining 5 grams will decay, leaving you with 2.5 grams.
After another 14 days (42 days total), half of the remaining 2.5 grams will decay, leaving you with 1.25 grams.
After another 14 days (56 days total), half of the remaining 1.25 grams will decay, leaving you with 0.625 grams.
Finally, after another 14 days (70 days total), half of the remaining 0.625 grams will decay, leaving you with 0.313 grams.
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After 70 days, we will have 0.313 g of the substance left. Hence, The correct response is 0.313 g.
The half-life of the substance is 14 days, which means that after 14 days, half of the substance will have decayed. Therefore, after 28 days, another half of the remaining substance will decay, leaving us with a quarter of the original amount. After 42 days, half of the remaining substance will decay again, leaving us with an eighth of the original amount. After 56 days, half of the remaining substance will decay once more, leaving us with a sixteenth of the original amount. Finally, after 70 days, another half of the remaining substance will decay, leaving us with a thirty-second of the original amount.
To calculate how much we have left after 70 days, we can use the formula:
amount remaining = (original amount) x (0.5)^(time elapsed / half-life)
Plugging in the values, we get:
amount remaining = (10 g) x (0.5)^(70 / 14) = 10 g x 0.03125 = 0.313 g
Therefore, after 70 days, we will have 0.313 g of the substance left.
The correct response is 0.313 g.
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Help Help Help Help Help Help Help Help Help Help Help Help Help Help Help Help Help Help Help Help Help Help
Answers
which of the following is not a stable ion?
1- Mg2+
2- S2-
3- CI-
4- K2+
which of the following is an example of an anion?
1- Na+
2- Fe
3- O2-
4- Ne
Answers
#1
K^2+
How?
K has Atomic number 19Let's look at electronic configuration
\(\\ \sf\longmapsto 1s^2s^22p^63s^23p^64s^1\)
2+ charge means 2 electrons donated.New EC will be
\(\\ \sf\longmapsto 1s^22s^22p^63s^23p^5=[Ar]^-\)
Hence its not stable .
#2
Anion means minus charge
Hence our answer is O^2-
what is chemistry about
Answers
Answer:
Explanation:
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.
Answer:
its the science that deals with the properties, composition, and structure of substances like elements and compounds, the transformations they undergo, and the energy that is released or absorbed during these processes
why is mass conserved in
chemical reactions?
Answers
How does an introduced species affect an ecosystem? Give 2 examples of positive ways
and 2 examples of negative ways.
Answers
Answer:
1+ it can help create balance among the ecosystem, particularly by controlling invasive species
2+ can help restore native ecosystems on degraded land
1- can become an invasive species
2- can cause an imbalance among native species
Explanation:
Making Measurements Consider the following thermometer, and use it to answer the question. calibration Thermometer 200 difference between 2markedvalues #ofspacesbetween marked values 30 20 10 What is the nearest value that we can estimate the volume of this thermometer to? A. 0.1°C B. 0.01 C C. 0.00 °C D. 1 °C
Answers
Answer:0.1C
Explanation:
Answer: It is 1
Explanation: Got it correct on Acellus hope it helps!
In the following code sequence, show the value of AL after each shift or rotate instruction has executed: mov al,0D4h shr al, 1 ; a. mov al,0D4h sar al, 1 ; b. mov al,004h sar al,4 ; c. mov al, 004h rol al, 1 ; d. (a) 6Ah (b) EAh (c) FDh (d) A9h
Answers
a. After sequence of instructions (mov al, 0D4h; shr al, 1), value of AL is 6Ah. b. After sequence of instructions (mov al, 0D4h; sar al, 1), value of AL is EAh. c. After sequence of (mov al, 004h; sar al, 4), value of AL is 000h. d. After sequence of instructions (mov al, 004h; rol al, 1), value of AL is A9h.
Let's go through each instruction and show the value of AL after each shift or rotate instruction has executed: a. mov al, 0D4h AL = 0D4h shr al, 1 Right shift (shr) divides the value by 2, discarding the least significant bit and shifting all other bits to right.
AL after shr = 6Ah b. mov al, 0D4h AL = 0D4h sar al, 1 Arithmetic right shift (sar) preserves the sign bit (the most significant bit) and shifts all bits to the right.
AL after sar = EAh c. mov al, 004h AL = 004h sar al, 4 AL after sar = 000h Note: Since the original value of AL is 004h (which is 4 in decimal), after shifting all bits to the right by 4 positions, the resulting value is 000h (which is 0 in decimal).
d. mov al, 004h AL = 004h rol al, 1 Left rotate (rol) shifts all bits to the left by 1 position, and the bit that gets shifted out from the most significant end is rotated back to the least significant end. AL after rol = A9h
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Would you recommend storing nuclear waste near natural resources? Explain why or why not.
Answers
Answer:
No
Explanation
I say no because that could possibly put many species of animals i danger of nuclear reaction. Not only would it put many animals in danger it would put humans plant and most likely make that area a toxic waste for years
Answer:
No
Explanation:
Question 1 Multiple Choice Worth 2 points)
(03.05 LC)
Which statement is true?
Answers
Answer:
I need more information. What is the question?
Answer:
what are the statements?
Explanation:
A container consists of 25% oxygen, 25% hydrogen and 50% nitrogen. The total pressure of the container is 60. 0 atm. What is the partial pressure of hydrogen in the container?
Answers
The partial pressure of hydrogen in the container is 60 atm or 60.0 atm.
Let's use the following information to calculate the partial pressure of hydrogen in a container filled with 25% oxygen, 25% hydrogen, and 50% nitrogen and having a total pressure of 60.0 atm:We know that the partial pressure of each component is directly proportional to its mole fraction.
So, let's first calculate the mole fractions of each component:Oxygen mole fraction = 25/100 = 0.25Hydrogen mole fraction = 25/100 = 0.25Nitrogen mole fraction = 50/100 = 0.5Now, we know that the sum of mole fractions of all components equals 1. So, we can write:0.25 + 0.25 + 0.5 = 1Next, we need to calculate the total moles of gas in the container:Total moles of gas = total pressure/RT, where R = gas constant and T = temperature of the container.We do not have the temperature of the container, so we cannot calculate the total moles of gas. However, we do not need to calculate it because we can use the fact that the sum of partial pressures of all components equals the total pressure of the container.
So, we can write:Partial pressure of oxygen + Partial pressure of hydrogen + Partial pressure of nitrogen = Total pressure of the containerLet's represent the partial pressure of hydrogen by P(H2).Then, we can write:0.25(P(H2)) + 0.25(P(H2)) + 0.5(P(H2)) = 60
Simplifying this expression, we get:1(P(H2)) = 60P(H2) = 60/1 = 60
Therefore, the partial pressure of hydrogen in the container is 60 atm or 60.0 atm.
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In an experiment using lead and oxygen, the following data was gathered. Find the empirical formula for the product.
Mass of evaporating dish and cover=19.50 grams
mass of evaporating dish, cover and lead = 22.45 grams
mass of evaporating dish, cover and lead oxide product=22.90 grams
Answers
Mass of evaporating dish and cover=19.50 grams mass of evaporating dish, cover and lead = 22.45 grams mass of evaporating dish, cover and lead oxide product=22.90 grams.The empirical formula for the product is PbO.
What is an empirical formula ?An empirical formula is a compound's chemical formula that only specifies the ratios of the elements it contains and not the precise number or arrangement of atoms. This would be the compound's element with the lowest whole number ratio.
Given:
A.Dish + Cover = 19.50 gram
B.Dish + Cover + lead = 22.45 grams grams
C.Dish + Cover + lead oxide = 22.90 grams
Mass of lead reacted = B-A
= 22.45 grams - 19.50 gram
= 2.95 gram
No. of moles of lead = 2.95/207.2
= 0.01g/mol
Mass of lead oxide = C-A
= 22.90 - 19.50
= 3.4 gram
Mass of oxygen in lead oxide = 3.4 - 2.95
= 0.45g
Number of moles of oxygen = 0.45/16
= 0.028moles
Therefore, it is PbO.
Thus, the empirical formula for the product is PbO.
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all of the following are ways in which fatty acids can differ from one another except: a. number of double bonds. b. degree of saturation. c. chain length. d. average number of kcals per gram.
Answers
All of the following are ways in which fatty acids can differ from one another except chain length and degree of saturation.
Fatty acids can be classified according to the length of their chain, for example, in short (if it has less than 8 carbons), medium (between 8-12 carbons), long (between 12-18 carbons) and very long (if it has less than 18 carbons); they are also classified according to their degree of unsaturation, in saturated, monounsaturated and polyunsaturated; and according to the isomerism in cis and trans fatty acids.
A fatty acid is different from others in various ways. Some examples are as double bonds they have, saturation level how long a fatty acid chain is.
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Question 1 (2 points)
Which option can be classified as a pure substance?
Question 1 options:
heterogenous mixture
solution
homogenous mixture
compound
Question 2 (2 points)
Law of conservation of mass states that:
Question 2 options:
matter is destroyed
matter does not change
matter is neither created nor destroyed
matter is created
Question 3 (2 points)
What is a property of bases?
Question 3 options:
all of the above
Sour taste
Slippery touch
Ability to form hydronium ions+
Question 4 (2 points)
Which property do solutions with low pH values have?
What does it mean to have a neutral pH? - Aseptic Health
Question 4 options:
have a -OH group
feels slippery
turns litmus paper blue
tastes sour
Question 5 (2 points)
How do the products of chemical reactions compare to their reactants?
Question 5 options:
The products often have completely different properties than the reactants.
The products are usually more toxic than the reactants.
The products usuallyhave more mass than the reactants.
The products usually have more atoms than the reactants.
Question 6 (2 points)
Which of the following is an example of a physical change?
Question 6 options:
Water freezing into ice.
A piece of wood burning.
A toy car rusting.
Zinc producing hydrogen gas when mixed with water.
Question 7 (2 points)
What might happen if you mixed a strong acid with an equally strong base?
Question 7 options:
You would see an explosive chemical reaction.
The base would destroy the acid.
You'd wind up with a pH-neutral salt and water.
The acid would destroy the base.
Question 8 (2 points)
In the equation shown, what are the reactants?
2H2+O2àH2O
Question 8 options:
Hydrogen and oxygen molecules (2H2 and O2 )
Ice crystals
Hydrogen atoms (H)
Water molecules (H2O)
Question 9 (2 points)
Which phrase most accurately describes a chemical change?
Question 9 options:
A change in form
A change in taste
A change on the molecular level
A change in appearance
Question 10 (2 points)
What does it mean when there is a physical change?
Question 10 options:
A new substance has been formed.
Matter has changed from one substance into a new substance.
Matter has changed size, shape or form
Matter has changed on the molecular level.
help pls ill give 20 points!
Answers
Answer:
I didn't KNOW WHAT IS THE ANSWWR OF YOUR QUISTION IM SO SORRY
Explanation:
I WANT TO INTRODUCE SELF TO YOU CAN I
Which statement does NOT correctly compare silicon with another element?
Answers
Answer:
i dont know
Explanation:
Answer:
Silicon conducts electricity as well as copper does.
Explanation:
you didn't gave any statements to choose the answer from.
but otherwise, what all I my knowledge says that Silicon conducts electricity as well as copper does.
Which determines the reactivity of an alkali metal?
its boiling and melting points
the shininess of its surface
the number of protons it has
its ability to lose electrons
Answers
Answer:
its ability to lose electron
The reactivity of an alkali metal is determined by its ability to loose electrons.
The alkali metals are highly electropositive. They easily loose electron to form a univalent positive ion.
This ability to form a univalent positive ion increases down the group hence cesium is the most electropositive element in nature.
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