convert 0.020 kg of Sn to mg of Sn

Answer:

Amoeba since it can come together as a multicellular with other amoebas, but still act as one giant living cell.

Explanation: i read in a book that red-slime molds can do that. hope it wasn't too far too late recent.

Rectal temperature is deducted from the average body temp of 98 farenheit since the algorithm estimates that body loses 1.5 degrees every hour.The period since death is roughly calculated by dividing the differences between the two by 1.5.

The Glaister Equation determines the number of hours that elapse after dying as a linear model of the decedent's body temperature.(98.7 degrees Fahrenheit - the deceased's body temperature).

Skin and bone cells can continue to function for several days.A human body takes about 12 hours so cool to the feel & 24 hours too cool completely.Following three hours, rigor mortis begins and lasts for 36 hours following death.

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Answer:

In experiment after experiment, they're always right

Explanation:

In science, nothing is accepted unless it can be supported by empirical evidence, this includes the quantum laws.

A plethora of experiments have confirmed these quantum laws to be correct and reliable.

Hence, all the quantum laws are backed up by plenty scientific evidence that show that the laws are indeed correct.

Answer:

Jay Bennett

Fentanyl

Opioid

extreme happiness, drowsiness, nausea, confusion, constipation, sedation, tolerance, addiction, respiratory depression and arrest, unconsciousness, coma, and death.

In Urine

Why did Jay overdose on Fentanyl?

Explanation:

I looked all of this up

Answer:

Pascal (1 N/m²) (Pa) 101,325 Pa = 1 atm.

Pounds per square inch (psi) 14.7 psi = 1 atm.

Torr (1 mmHg) 760 torr = 1 atm.

Inches of Mercury (in Hg) 29.92 in Hg = 1 atm.

Atmosphere (atm) 1 atm = 1 atm.

Hope this helps :)

Pls brainliest...

Take a reaction among lime water

\(\\ \rm\rightarrowtail CaO+H_2O=Ca(OH)_2\)

If it releases heat

The question must include

Answer:

hope it's helpful to you

Answer:

Heat causes atoms and molecules to absorb energy and move around.

Explanation:

Almost all of the material beneath the surface of the earth is in a liquid state which absorb heat coming from Earth's core. The heat causes these materials to move and flow because as the amount of heat increases, it gets absorbed by the atoms and molecules, causing them to move around and create motion.

I hope this answer helps.

Answer:

Bin 1 points to a carbon bonded to a double bonded carbon and single bonded to two hydrogens. --- trigonal planar, tetrahedral

Bin 2 points to a carbon double bonded to a carbon and single bonded to a carbon and one hydrogen.------- trigonal planar, tetrahedral

Bin 3 is a carbon single bonded to two carbons and single bonded to two hydrogens. ----- tetrahedral, tetrahedral

Bin 4 is the same as bin 3.--------tetrahedral, tetrahedral

Bin 5 is a carbon triple bonded to a carbon and single bonded to a carbon.---- linear, tetrahedral

Bin 6 is triple bonded to a carbon and single bonded to a hydrogen.---linear, tetrahedral

Explanation:

A single C-C or C-H bond is in a tetrahedral geometry, the carbon atom is bonded to four species with a bond angle of 109°.

A C=C bond is trigonal planar with a bond angle of 120°.

Lastly, a C≡C bond has a linear geometry with a bond angle of 180° between the atoms of the bond.

The percent yield of NH₃ for the reaction is 75%

Percent yield is the percent ratio of actual yield to the theoretical yield

The first thing that you need to do here is to calculate the theoretical yield of the reaction that is if the reaction has 100% yield then

The balanced chemical equation

N₂ + 3H₂ → 2NH₃

This tell you that every 1 mole of nitrogen gas that takes part in the reaction will consume 3 moles of hydrogen gas and produce 1 mole of ammonia and here that 1 mole of nitrogen gas react with 1 mole of hydrogen gas and since enough hydrogen gas to ensure that all moles of nitrogen gas can react

3 mole H₂ > 1 mole H₂

1 mole H₂×2 mole NH₃/3mole H₂ = 0.667 mole NH₃

So at 100% yield this represent the reaction thereotical yield

Now that reaction produced 0.50 moles of ammonia then this represent the reaction actual yield

In order to find the % yield you have to figure out how many moles of ammonia are actually produced for every 100 moles of ammonia that could theoretically be produced

Then 0.667 moles will produce 0.50 moles so you can say that

100 moles NH₃ in theory ×0.50 moles NH₃ actual/0.667 moles of NH₃ actual = 75 moles of NH₃

Therefore, you can say that the reaction has a percent yield equal to

%yield = 75%

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Answer:

Explanation:

The acceptable range of mass when you are asked to obtain 3.000g of NaCl would typically be within a certain margin of error, usually +/- 0.001g or 0.1%. This range represents the precision of the measurement. It is an indication of the degree of accuracy with which the measurement was made.

When requested to obtain 3.000g of NaCl, the acceptable range of mass would normally be 0.001g. The accuracy of the measurement is represented by this range.

This range denotes the measurement's accuracy, which is a gauge of how easily the findings may be repeated. The greatest variation from the goal mass of 3.000g that is deemed acceptable is 0.001g. The measurement is more accurate the lower the deviation. Depending on the goal of the experiment, the precision of the balance utilised, and the method's sensitivity, this precision need could change. A accuracy of 0.001g is often regarded as satisfactory for the majority of laboratory applications. When working with extremely reactive or dangerous compounds or for more important applications, an accuracy of 0.0001g or less can be necessary.

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Answer:

c

Explanation:

II and III

Answer:

C

Explanation:

cause i'm smart

Answer:

D

Explanation:

Because it says tree roots breaking rocks into smaller rocks.

Hope this helped!

The volume of the cylinder after the reaction is 3.11 L.

The ideal gas law can be used to solve this problem: PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature. Since pressure and temperature are constant, we can simplify the equation to:
V1n1 = V2n2
where V1 is the initial volume, n1 is the initial number of moles, V2 is the final volume, and n2 is the final number of moles. We know that n2 = n1 + 0.661 mol (the amount of product produced), so:
V2 = (V1n1 + n2*R*T)/n2
We are given that n1 = 0.240 mol, V1 = 2.02 L, and R = 0.08206 L*atm/mol*K (the ideal gas constant). We need to find T in order to solve for V2. Since we know that the reaction completely reacts, we can assume that the initial gas is the limiting reactant. The balanced chemical equation for the reaction will tell us the stoichiometry:
Reactant + Reactant --> Product
0.240 mol + ? mol --> 0.661 mol
Since the product is gaseous, we can assume that the limiting reactant is completely consumed to produce the 0.661 mol of product. Therefore, we can solve for the number of moles of the other reactant:
? mol = 0.661 mol - 0.240 mol = 0.421 mol
Now we can use the ideal gas law to solve for T:
PV = nRT
(P is constant, so we can use the initial pressure)
V1n1 = n2RT
(2.02 L)(0.240 mol) = (0.421 mol)(0.08206 L*atm/mol*K)T
T = (2.02 L)(0.240 mol)/(0.421 mol)(0.08206 L*atm/mol*K) = 12.1 K
Finally, we can plug in the values for V1, n1, n2, and T to solve for V2:
V2 = (V1n1 + n2*R*T)/n2
V2 = (2.02 L)(0.240 mol) + (0.661 mol)(0.08206 L*atm/mol*K)(12.1 K)/(0.421 mol)
V2 = 3.11 L
Therefore, the volume of the cylinder after the reaction is 3.11 L.

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To calculate the root mean square velocity and kinetic energy of F2, Cl2, and Br2 at 298K, we need to use the kinetic theory of gases.

The root mean square velocity of a gas can be calculated using the formula:

v_rms = √(3kT/m)

where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the molar mass of the gas.

The kinetic energy of a gas can be calculated using the formula:

E_k = (1/2)mv_rms^2

At 298K, the root mean square velocity and kinetic energy of F2, Cl2, and Br2 can be calculated as follows:

F2:

molar mass = 2 * 18.998 g/mol = 37.996 g/mol

v_rms = √(3 * 8.314 J/mol*K * 298K / 37.996 g/mol) = √(0.0244) m/s

E_k = (1/2) * 37.996 g/mol * (0.0244 m/s)^2 = 0.0167 J/mol

Cl2:

molar mass = 2 * 35.453 g/mol = 70.906 g/mol

v_rms = √(3 * 8.314 J/mol*K * 298K / 70.906 g/mol) = √(0.0132) m/s

E_k = (1/2) * 70.906 g/mol * (0.0132 m/s)^2 = 0.0051 J/mol

Br2:

molar mass = 2 * 78.918 g/mol = 157.836 g/mol

v_rms = √(3 * 8.314 J/mol*K * 298K / 157.836 g/mol) = √(0.0064) m/s

E_k = (1/2) * 157.836 g/mol * (0.0064 m/s)^2 = 0.0016 J/mol

To rank the halogens with respect to their rate of effusion, we need to consider the root mean square velocity of each gas. The rate of effusion of a gas is directly proportional to the root mean square velocity of the gas, which is the velocity of the gas particles. Therefore, the gas with the higher root mean square velocity will effuse faster than the gas with the lower root mean square velocity.

From the above calculation, we can see that the root mean square velocity of F2 is the highest, followed by Cl2, and then Br2. Therefore, the halogens can be ranked in terms of their rate of effusion as follows:

F2

Cl2

Br2

So Fluorine(F2) will effuse faster than Chlorine(Cl2) and Bromine(Br2)

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Answer:

3−

Thus, a nitrogen atom will form an anion with three more electrons than protons and a charge of 3−.

Explanation:

Answer:

92.4%

Explanation:

Assume 100g of the cathode material. The LiCoO2 cathode has 7.09 g of Li.  If half of Li migrates during charging, 3.55g Li migrates. 100g of the LiMn2O4 cathode contain 3.84g of Li. The fraction of lithium in LiMn2O4 that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode:

(3.55g/ 3.84g ) * 100% = 92.4%

From electrolysis, 92.4% would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode.

Electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. The voltage that is needed for electrolysis to occur is called the decomposition potential.

Assume 100 g of the cathode material. The LiCoO₂ cathode has 7.09 g of Li.  If half of Li migrates during charging, 3.55 g Li migrates. 100 g of the LiMn₂O₄cathode contain 3.84 g of Li. The fraction of lithium in LiMn₂O₄ that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode:(3.55 g/ 3.84 g ) × 100% = 92.4%

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Answer:

Observes and measure

Explanation:

Answer:

they use tests

Explanation:

they search for evidence using experiments,an experiment is a test to see if their explanation is right or wrong. evidence is made up of observations a scientist makes during an experiment

Answer:

1: because phosphate contain oxide ions so that is base character

Answer:

Forensic drug chemists analyze samples of unknown materials including powders, liquids and stains to determine the chemical identity or characteristics of the compounds that make up the sample. samples submitted as evidence in a drug-related case can contain one compound or a mixture of many compounds.

Answer:

easily bent or shaped

Explanation:

malleable means to be able to be bent or sualef without breaking

metals are malleable

hope this helps :)

Moles of Ammonia produced : 4 moles

Given

6 mol of H₂

Required

moles of Ammonia

Solution

Reaction

N₂ + 3H₂ → 2NH₃

In chemical equations, the reaction coefficient shows the mole ratio of the reacting compound (reactants and products)

From the equation, mol ratio of H₂ : NH₃ = 3 : 2, so mol NH₃ :

= 2/3 x moles H₂

= 2/3 x 6

= 4 moles

The earth contains a lot of oxygen. According to estimates of the proportions of various atom types present in the cosmos, oxygen ranks fourth in terms of abundance, behind hydrogen, helium, and neon. Here among the given elements, oxygen is 16th element. The correct option is A.

Five elements make up group 16 of the contemporary periodic table: oxygen, sulphur, selenium, tellurium, and polonium. Because several of the elements in this group may be recovered from oxide or sulphide ores, they are frequently referred to as chalcogens or ore-forming elements.

O is used as the chemical symbol for oxygen. It is a tasteless, colourless gas that humans breathe in order to create carbon dioxide during the respiration process. As a diatomic molecule (O₂), oxygen exists.

Thus the correct option is A.

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Your question is incomplete, most probably your full question was:

Electron dot diagrams for four elements are shown. Which element would be found in group 16?

A. Oxygen

B. Carbon

C. Boron

D. Helium

Answer:

2

Explanation:i did the test

The spin of the electron is represented by the spin quantum number, ms; ms = +1/2 or -1/2.

Electron in orbital type 2pz.

The primary quantum number, n=1, 2, 3, and n=2 (the second energy level), is one of the four quantum numbers that are assigned to each electron in an atom to define that electron's state.

An atomic orbital's azimuthal quantum number characterizes the form of the orbital and is used to calculate the orbital's angular momentum. When l = 1, the p subshell is defined as l = 0,1...n-1.

The orbital in which the electron is placed is indicated by the magnetic quantum number, ml. ml = -l...+l, and ml = 0 indicates the Pz orbital.

The spin of the electron is represented by the spin quantum number, ms; ms = +1/2 or -1/2.

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The pressure of the gas inside the cylinder is 52.90 atm

Given is the number of moles of gas, the temperature and the volume of the gas and we need to find the pressure of the gas inside the cylinder, for this we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure of the gas (in units of pressure, such as atm)

V = Volume of the gas (in liters)

n = Number of moles of the gas

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature of the gas (in Kelvin)

First, let's convert the temperature from Celsius to Kelvin:

T = 25.0 °C + 273.15 = 298.15 K

Now we can substitute the values into the ideal gas law equation:

P × 12.5 L = 27.0 moles × 0.0821 L·atm/(mol·K) × 298.15 K

Simplifying the equation:

P × 12.5 L = 661.2587 L·atm

Dividing both sides by 12.5 L:

P = 661.2587 L·atm / 12.5 L

P ≈ 52.90 atm

Therefore, the pressure of the gas inside the cylinder is approximately 52.90 atm.

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We can use the ideal gas law equation to determine the pressure of a gas within a cylinder:

PV = nRT

Where:

P is the pressure of the gas (in units of pressure, such as atm)

V is the volume of the gas (in units of volume, such as liters)

n is the number of moles of the gas

R is the ideal gas constant (0.0821 L·atm/(mol·K))

T is the temperature of the gas (in units of temperature, such as Kelvin)

we need to convert the temperature from Celsius to Kelvin:

T(K) = T(°C) + 273.15

T(K) = 25.0 °C + 273.15

T(K) = 298.15 K

Now we can plug the data into the ideal gas law equation as follows:

P * 12.5 L = 27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K

Simplifying the equation:

P = (27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K) / 12.5 L

Calculating the pressure:

P ≈ 5.046 atm

As a result, the gas inside the cylinder is under a pressure of about 5.046 atm.

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Answer:

8 days

Explanation:

1/2   *    1/2    *    1/2    =   .125     or   12.5%  

three half lives     in   24 days     one half life = 8 days  

Answer:

the molar mass of an element is numerically equal to atomic mass in grams-