Answers
1) Mass of the starting materials is equal to the mass of the products
2) The products have different properties from the reactants
3) During the reaction, heat is taken away or given out
4) A chemical reaction is difficult to reverse.
What is a chemical reaction?A chemical reaction is the transformation of one or more chemicals into one or more new compounds with unique physical and chemical properties. During a chemical reaction, atoms are moved around, chemical bonds are made and broken, and new molecules are produced.
Chemical reactions involve the formation of new chemical bonds, the breaking of existing chemical bonds, and the rearrangement of atoms in order to produce new compounds.
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Related Questions
2. (RI 1.3) What connection does the author draw between the way humans would be
treated on another planet and the way we treat other organisms?
a. He suggests that they would handle human embryos with an abundance of
caution, control, and curiosity, as we do with invasive or potentially
dangerous species.
b. He theorizes that inhabitants of other planets would seek out our knowledge
and advice about protecting the environment.
c. He maintains that we would likely be eliminated, just as we have eradicated
many disease-causing microorganisms.
d. He notes that we would not be able to survive on other planets, in much the
same way that the actions of humans make it more difficult for other species
to survive on Earth.
Answers
Answer:D
Explanation:
explain why the other 3 answer options are incorrect.
Answers
Compounds are always uncharged
Protons have about the same mass as: plasma particles neutrons electrons
Answers
Answer: What i got was neutrons and it said it was right.
Explanation:
i looked back in my notes after i couldn't find the answer plus neutrons and electrons are two different answers on my question, hope y'all get it right. ;)
The air pressure inside a submarine is 1.26 atm. What would be the psi of the submarine?
Answers
Answer:18.5
Explanation:
balance the equation and use the balanced equation for the remaining questions
Answers
The coefficient 2 was added in front of Cu(NO3)2, which gives two atoms of Cu and four atoms of NO3 on both sides of the equation.
What is atom?Atom is a text editor that is open source and free to use. It has a modern, approachable and customizable user interface. It works well for coding, scripting, and markup languages, and has many features that make it attractive to developers. It is built on Electron, a framework for building cross-platform apps.
The equation has to be balanced by adding coefficients so that the same number of atoms are on each side of the equation. In this equation, there is one atom of Na on the left side and two atoms of Cu and two atoms of NO3 on the right side. To balance the equation, the coefficient 2 was added in front of Cu(NO3)2, which gives two atoms of Cu and four atoms of NO3 on both sides of the equation.
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calculate the mass (in grams) of a compound 25.0 l sample of alcohol that has a density of 0.791 g/ml
Answers
In this case, the given volume is 25.0 L, and the density is 0.791 g/ml. Multiplying the two together, we get 19,775 grams as the total mass of the sample. This is the amount of mass present in the 25.0 L sample of alcohol with a density of 0.791 g/ml.
The mass of a 25.0 L sample of alcohol with a density of 0.791 g/ml is 19,775 grams. This can be calculated by multiplying the sample volume by the density:
25.0 L * 0.791 g/ml = 19,775 g
To explain further, density is defined as mass per unit volume. In this case, the mass per unit volume is 0.791 g/ml, which means for every milliliter of alcohol, 0.791 grams of mass is present. To find the total mass, the volume needs to be multiplied by this density value. This can be done using the formula:
mass = volume * density
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What would be the correct answers
Answers
Answer:
A chemical bond is formed and energy is absorbed I do believe
Explanation:
define funtional unit?
Answers
Answer:
The functional unit of a product system is a quantified description of the performance requirements that the product system fulfils. The functional unit should as far as possible relate to the functions of the product rather than to the physical product.
Explanation:
The volume of a 24.0% (by mass) solution is 65.2 mL. The density of the solution is 1.072 g/mL. What is the mass of the solution
Answers
the mass of the solution is 69.9608 g.
Given that:
The volume of a 24.0% (by mass) solution is 65.2 mL.
The density of the solution is 1.072 g/mL.
To find: The mass of the solution
Mass % = (Mass of solute ÷ Mass of solution) × 100Given,
Mass % = 24%
This means that 24 g of solute is present in 100 g of solution.
Let m be the mass of the solution.
Then,24 g solute is present in 100 g solution.24 g solute is present in 1000 ml solution.24 × 65.2 / 1000 = 1.5648 g solute is present in 65.2 ml solution.
From the density of the solution,
Mass of 1 ml of solution = 1.072 g1 ml of solution
= Mass of 1 ml of solution = 1.072 g
So, 65.2 ml of solution = 65.2 × 1.072 g = 69.9608 g
Therefore, the mass of the solution is 69.9608 g.
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This is the last one I need. Just want to make sure I did it right.
Answers
To combine ions to form ionic compounds, we need the combine in such a way that it gets neutral charge.
We can combine each anion with each cation to get the 4 compounds we need.
To combine SO₄²⁻ with Pb⁴⁺ we first find the Least Common Multiple of their charges, 2 and 4.
They have the factor 2 in common, so the LCM is 4. This is the final charge of each that will cancel out.
To get 4+, we only need 1 Pb⁴⁺.
To get 4-, we need 2 SO₄²⁻.
So, the formula is:
Pb(SO₄)₂
To combine SO₄²⁻ with NH₄⁺ is easier because one of them has single charge. In this case, we can simply pick one of the multiple charge ion and the same amount that will cancel its charge of the single charged one.
So, we picke 1 SO₄²⁻, ending with 2-.
And we picke 2 NH₄⁺, ending with 2+.
The formula:
(NH₄)₂SO₄
To combine C₂H₃O₂⁻ with Pb⁴⁺ we do the same, because the anion is single charged.
Pick 1 Pb⁴⁺, ending with 4+.
Pick 4 C₂H₃O₂⁻, ending with 4-.
The formula:
Pb(C₂H₃O₂)₄
To combine C₂H₃O₂⁻ with NH₄⁺, both have same charge, so we just need one of each and their charges will cancel out.
The formula:
NH₄C₂H₃O₂
So, the formulas are:
Pb(SO₄)₂
(NH₄)₂SO₄
Pb(C₂H₃O₂)₄
NH₄C₂H₃O₂
i need help ill give branlst
Bacteria are prokaryotes so their cells do not have a nucleus
false
true
Answers
Answer:
true
Explanation:
Explanation:
true. ..... .............
At 20 °C, how much sodium chloride could be dissolved into 0.5 L of water?
Answers
Answer:
Explanation:
Sodium chloride
Sodium chloride, commonly known as salt, is an ionic compound with the chemical formula Knack, representing a 1:1 ratio of sodium and chloride ions. With molar masses of 22.99 and 35.45 g/mole respectively, 100 g of Nicol contains 39.34 g Na and 60.66 g Cl. Sodium chloride is the salt most responsible for the salinity of seawater and of the extracellular fluid of many multicellular organisms. In its edible form of table salt, it is commonly used as a condiment and food preservative. Large quantities of sodium chloride are used in many industrial processes, and it is a major source of sodium and chlorine compounds used as feedstocks for further chemical syntheses. A second major application of sodium chloride is de-icing of roadways in sub-freezing weather.
A mixture of three gases (N2, Ar, ans O2) at 2.6 atm is found to contain 23% N2, 3.0% Ar. What is the partial pressure of O2?
Group of answer choices
190
1.9
2.1
0.68
0.74
Answers
The partial pressure of O2 is 1.9 atm.
What is the partial pressure of oxygen?In a mixture of gases, the partial pressure of a specific gas is the pressure that gas would exert if it occupied the entire volume alone at the same temperature. To find the partial pressure of O2, we first need to calculate the total moles of the three gases. From the given percentages, we can assume a 100-mole sample, which means there are 23 moles of N2 and 3 moles of Ar in the mixture. Since the sum of the mole percentages is less than 100%, the remaining percentage corresponds to O2. The percentage of O2 can be calculated as (100% - 23% - 3%) = 74%.
Next, we convert the percentage of O2 into moles, which is (74/100) x 100 = 74 moles. To determine the partial pressure of O2, we use Dalton's Law of Partial Pressures, which states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of each gas. Therefore, the partial pressure of O2 is (74 moles / 100 moles) x 2.6 atm = 1.9 atm.
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Given the following chemical reaction: 2H2(g) + O2(g) → 2H2O(l) What is the stoichiometric mixture?
Answers
2 moles of H2 react with 1 mole of O2 gas, according to the balanced reaction. the stoichiometric ratio of the moles of H2 to the moles of O2 is 2:1 as a result.
How can you determine whether a reaction is stoichiometric?When all of the reactants are consumed and none are left after the chemical reaction has finished, it is said to have occurred in a stoichiometric chemical reaction.
What does stoichiometry refer to?Stoichiometry can be summed up as the process of calculating the products and reactants of a chemical reaction. It primarily has to do with numbers. Stoichiometry is a fundamental concept in chemistry that makes it easier to use balanced chemical equations to ascertain the amounts of reactants and products.
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Choose an example of a reaction to which Markovnikov's rule applies.
O CH₂=CH-CH2-CH3 + HBr CH₂ Br=CH2-CH2-CH3
O CH,=CH-CH, CH3 + HBr → CHg =CHBr–CH2–CH3
O CH,=CH-CH,—CH, + HBr → CH,Br–CHBr–CH2–CH, + HBr CH₂Br-CH2-CH2-CH3
O CH₂=CH-CH2-CH3 O CH,=CH-CH2–CH3 + HBr → CH3–CHBr–CH2–CH3
Answers
The example of a reaction to which Markovnikov's rule applies is: CH₂=CH-CH₂-CH₃ + HBr → CH₂Br-CH₂-CH₂-CH₃
In this reaction, the hydrogen atom from HBr adds to the carbon atom with the fewer alkyl substituents (less substituted carbon), while the bromine atom adds to the carbon atom with more alkyl substituents (more substituted carbon). This follows Markovnikov's rule, which states that in the addition of a protic acid (such as HBr) to an asymmetrically substituted alkene, the hydrogen atom adds to the less substituted carbon and the other atom adds to the more substituted carbon.
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Which statement describes how the types of radiation in the electromagnetic spectrum are different?
They have different amplitudes.
They have different wavelengths.
They travel at different speeds through space.
They travel different distances through space.
Answers
Answer:
they have different wavelengths
What is nii2 cation and anion form?
Answers
The NiI₂ cation is a positively charged ion of Nickel and Iodine, with the formula Ni²⁺.
The anion is a negatively charged ion of Nickel and Iodine, with the formula I²⁻.
Nickel and Iodine form the cation-anion pair as part of a redox reaction. When Nickel and Iodine are mixed together, they react and form the cation and anion forms.
This is because when Nickel is oxidized, it loses electrons and becomes a positive ion, while Iodine gains electrons and becomes a negative ion. This forms the cation-anion pair.
The NiI₂ cation and anion form also has an important role in the electrolysis process. During electrolysis, the NiI₂ cation and anion forms are used to transfer electrical energy into chemical energy.
This allows for the breakdown of larger molecules into their component parts. The NiI₂ cation and anion form is also used in fuel cells and other electrochemical reactions.
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Describe and explain the relationship between boiling point of a hydrocarbon and the size of its molecules?
Answers
Answer:
As you go up the fractionating column, the hydrocarbons have: lower boiling points lower viscosity (they flow more easily) higher flammability (they ignite more easily) This means that in general hydrocarbons with small molecules make better fuels than hydrocarbons with large molecules.
Which of the following statements is FALSE?
The microscopic size of cells enable them to function properly.
Most organisms on Earth are multi-celled.
Some cells can be shaped like a ball.
Growing children’s cells are constantly dividing.
Answers
Answer:
The answer is functioning properly ok dude?
Explanation:
Answer: "The microscopic size of cells enable them to function properly.
Most organisms on Earth are multi-celled." is false
Explanation:
In unicellular organisms, cell division is the means of reproduction; in multicellular organisms, it is the means of tissue growth and maintenance. Survival of the eukaryotes depends upon interactions between many cell types, and it is essential that a balanced distribution of types be maintained. This is achieved by the highly regulated process of cell proliferation. The growth and division of different cell populations are regulated in different ways, but the basic mechanisms are similar throughout multicellular organisms.
What characteristics of a real gas would result in the gas being:
(i) less compressible than an ideal gas
(ii) more compressible than an ideal gas
(Note: This is a theoretical question)
The best answer will be given a brainiest.
Answers
The compressibility of a real gas compared to an ideal gas can be influenced by two characteristics: intermolecular forces and molecular volume. A gas with stronger intermolecular forces and larger molecular volume would be less compressible than an ideal gas, while a gas with weaker intermolecular forces and smaller molecular volume would be more compressible than an ideal gas.
(i) Less compressible than an ideal gas: Real gases with stronger intermolecular forces tend to be less compressible than ideal gases. These intermolecular forces, such as hydrogen bonding or dipole-dipole interactions, cause the gas molecules to attract each other, making it harder to compress the gas. The intermolecular forces counteract the pressure exerted on the gas, resulting in a decreased compressibility compared to an ideal gas.
(ii) More compressible than an ideal gas: Real gases with weaker intermolecular forces and smaller molecular volumes are more compressible than ideal gases. Weak intermolecular forces allow the gas molecules to move more freely, making them easier to compress. Additionally, gases with smaller molecular volumes occupy less space and can be compressed more readily compared to ideal gases.
Overall, the compressibility of a real gas compared to an ideal gas is influenced by the strength of intermolecular forces and the size of the gas molecules.
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I have to turn this in please answer it!!
Answers
Answer:
Topaz I do believe
Hope This Helps!
12. What is the atomic number of the atom that forms an anion with 36 electrons and a Explain(words); write out formula, then solve for missing variable charge of -1?
Answers
The missing variable of (⁻¹) is bromine.
Let the missing variable be X.
No. of electrons in the monoatomic anion (X⁻¹ )= 36
No. of electrons in the monoatomic atom (X) = 35
Atomic No. = No. of protons = No. of electrons in neutral atom = 35
Mass No. = No. of protons + No. of neutrons
= 35 + 45 = 80
Hence, the element must be Br as its mass no is 80 and atomic no is 35.
And the ion is bromide ion or Br⁻¹ ion. It is an anion which gains an electron to achieve octet.
X → Br and X⁻¹ → Br⁻¹
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Which one has more Thermal Energy? A cup of boiling water or a bathtub of warm water? Explain! Please answer if you can, thank you!! P.S this is science but i just put it as chemistry?
Answers
Answer:
See explanation
Explanation:
The thermal energy of a substance is affected both by its mass and by its temperature. Thermal energy is defined as the total kinetic energy of all particles in an object.
Even though the cup of water has a higher temperature, the bathtub has more thermal energy because it contains much more mass of water compared to the cup. It will release more thermal energy to the surroundings compared to the cup of boiling water.
The bathtub of warm water has a higher total thermal energy due to its bigger volume, but the cup of boiling water has a higher average kinetic energy per particle.
The thermal energy of a cup of boiling water is greater than that of a warm bathtub. The sum of all the kinetic energies of the particles in a substance is its thermal energy. The temperature of boiling water is higher than that of warm bathwater. The average kinetic energy of the particles is measured by temperature. The average kinetic energy of the particles in a cup of boiling water would be higher than that of the warm water in a bathtub, which is normally between 38 and 45 degrees Celsius (100 and 113 degrees Fahrenheit), because water has a boiling temperature of 100 degrees Celsius (212 degrees Fahrenheit).
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You want to push a table 5 feet across the floor. How would a decrease in the resistance caused by friction change the amount of force needed to move an object? Write 1-2 sentences.(2 points) BoldItalicUnderline
Answers
Friction and force applied on an object is inversely related to each other.
How friction effect the amount of force?Friction refers to the force that resists the motion of an object that collide or slide against each other. If the friction is increased, more energy is needed for the movement of the object.
While on the other hand, if friction is decreased less force is needed so we can conclude that friction and force is inversely related to each other.
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this rock above contains many large (2-5cm across) phenocrysts that are salmon pink. which mineral is this?
Answers
Phenocrysts are the kind of feldspar minerals.
A mineral is an detail or chemical compound that is normally crystalline and that has been shaped because of geological techniques. Examples include quartz, feldspar minerals, calcite, sulfur and the clay minerals inclusive of kaolinite and smectite.
A clearly going on inorganic element or compound having an. orderly internal shape and feature chemical composition, crystal form, and physical. properties. Minerals range from rocks, which are certainly happening solids composed of 1 or more minerals.
Minerals are labeled based totally on their crystal shape and chemistry. Minerals are divided into two types particularly steel and non-metal.
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Dry ice changes from a solid directly into a gas at room temperature. Sublimation is the transition of a substance directly from the solid to the gas phase without passing through an intermediate liquid phase. What does sublimation demonstrate
Answers
Answer:
The process in which a solid changes directly to a gas is called sublimation. It occurs when the particles of a solid absorb enough energy to completely overcome the force of attraction between them. Dry ice (solid carbon dioxide, CO2) is an example of a solid that undergoes sublimation.
i swear if someone helps me with this I’ll give them the biggest hug lol
Answers
Answer:
C
Explanation:
Bc Look at it like this if norm and grav are equal aka the reason why hes not going threw the cement or flying in the air then the app and the fric are equal too or he would slip and fall
If excess ammonium sulfate reacts with 20.0g of calcium hydroxide how many liters of ammonia are produced at STP?
(NH4) 2SO4 + Ca (OH) 2 --> CaSO4 + NH3 + H20
Answers
If excess ammonium sulfate reacts with 20.0g of calcium hydroxide then liters of ammonia are produced at STP 0.081L
Ammonium sulphate is the organic solvent and the primary use of ammonium sulphate is as a fertilizer for alkaline soils
Here given reaction is
(NH₄)₂SO₄ + Ca(OH)₂ → CaSO₄ + NH₃ + H₂O
Here given data is
Calcium hydroxide = 20.0g
We have to find liters of ammonia are produced at STP =?
20.0g of (NH₄)₂SO₄ STP = ?
Then 20.0g of (NH₄)₂SO₄×1 mol/132g×0.54L/1 mol = 0.081L
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What is 876 millimeters to decameters?
Answers
Answer: 0.0876 decameters
Explanation:
10000 mm=1 dm
876/10000=0.0876 dm
When hydrogen sulfide gas is bubbled into a solution of sodium hydroxide, the reaction forms sodium sulfide and water.
How many grams of sodium sulfide are formed if 1.80 g of hydrogen sulfide is bubbled into a solution containing 2.40 g of sodium hydroxide, assuming that the sodium sulfide is made in 93.0 % yield?
Answers
The amount of sodium sulfide formed would be 2.18 grams..
Stoichiometric problemHydrogen sulfide and sodium hydroxide react according to the following equation:
\(2 NaOH (aq) + H_2S (g) -- > 2 H_2O (l) + Na_2S (aq)\)
Mole equivalent of 1.80 g hydrogen sulfide = 1.80/34.1 = 0.05 mol
Mole equivalent of 2.40 g of sodium hydroxide = 2.40/40 = 0.06 mol
From the equation of the reaction, the mole ratio of sodium hydroxide to hydrogen sulfide is 2:1. This means that 0.06 mol sodium hydroxide is limiting while 0.05 mol hydrogen sulfide is in excess.
The mole ratio of sodium hydroxide to sodium sulfide is 2:1. Thus, the equivalent mole of sodium sulfide produced would be:
0.06/2 = 0.03 mol
Mass of 0.03 mol sodium sulfide = 0.03 x 78 = 2.34 grams
At 93.0% yield = 0.93 x 2.34
= 2.18 grams
In other words, the amount of sodium sulfide formed at 93.0% yield would be 2.18 grams.
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