A dunk tank hold 30,533 moles of water? How many grams of water are in the tank?

The reaction is given by

[tex]\\ \rm\Rrightarrow {}^{127}_{56}Ba\longrightarrow {}^{0}_{+1}\beta+{}^{127}_{55}Cs[/tex]

Barium goes underneath beta decay to form Ceaseum

[tex]\sf {}^{127}_{56}Ba\longrightarrow {}^0_{1}\beta+{}^{127}_{55}Cs[/tex]

Remember

Answer:

oxidation is an energy that produces reaction in a living cell.

Answer:

the process or result of oxidizing or being oxidized.

Explanation:

eimetchuinsumuleavtubronAnswer:

Explanation:

Answer:

3.4 x 10²⁵ atoms Ag

Explanation:

To find the amount of silver (Ag) atoms, you need to use Avogadro's number to convert between moles and atoms. Make sure to arrange the ratio in a way that allows for the cancellation of moles. The final answer should have 2 sig figs to correlate with the number of sig figs in the given value (56 = 2 sig figs).

Avogadro's number:

6.022 x 10²³ atoms = 1 mole

56 moles Ag          6.022 x 10²³ atoms
--------------------  x  ----------------------------------  =  3.4 x 10²⁵ atoms Ag
                                         1 mole

The pH of a solution that contains 0.0011 moles of KOH in 393 mL of solution is 2.56. Details about pH can be found below.

The pH of a solution can be calculated using the following expression:

pH = - log [H3O+]

However, the hydrogen concentration of the KOH solution can be calculated as follows:

concentration = 0.0011 mol ÷ 0.393 L

concentration = 2.798 × 10-³M

The pH of KOH = - log [2.798 × 10-³M]

pH = 2.56

Therefore, the pH of a solution that contains 0.0011 moles of KOH in 393 mL of solution is 2.56.

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Answer: 0

Explanation:

If 3 electrons were to be gained, then the number of protons would equal the number of electrons.

Answer:

Hope this helps kinda got confused mid way

Explanation:

So the hydrogen sulphide is H2S for the molecular formula. Then the mass of hydrogen sulphide would be 1×2+32= 34g/mol At STP.

The volume of the 12.96 g sample of pure hydrogen gas is 145.24 L

We'll begin by calculating the number of mole in 12.96 g hydrogen gas. This can be obtained as follow:

Mole = mass / molar mass

Mole of Hydrogen gas = 12.96 / 2

Mole of Hydrogen gas = 6.48 mole

To determine the volume of the pure hydrogen gas, we shall assume that the gas is at standard temperature and pressure (STP). Thus, we shall apply the ideal gas equation as illustrated below:

V = nRT / P

V = (6.48 × 0.0821 × 273) / 1

V = 145.24 L

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Answer:

The molecular weight 62,03 g/mol

Answer:

b) soil

heterogenous means you can pick out individual bits.

The study of matter and energy best describes physical science. Hence, option B is correct.

Physical science is the study of the inorganic world.

Physics is a branch of science that studies matter and its motion through space and time, along with related concepts such as energy and force. Physics is one of the "fundamental sciences" because of the other natural sciences (like biology, geology etc.)

Thus the study of matter and energy best describes physical science. Hence, option B is correct.

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Answer:

See below

Explanation:

9.045/8.492 * 100% = 106.5%

There was other solids already dissolved in the water, or dust or other contaminants got into the water. ....or the measurement was incorrect. (like maybe the solid was still wet?)

Answer:

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Explanation:

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Answer:

ionic bonds

Explanation:

ionic bonds result from the mutual attraction between oppositely charged ions. They tend to be stronger than covalent bonds due to the coulombic attraction between ions of opposite charges.

The weak base ionization constant (Kb) for [tex]CH_3NH_2[/tex] is equal to

[tex]Kb = [CH_3NH^{3+}] [OH^-] / [CH_3NH_2][/tex]

Kb is the base dissociation constant.

The expression for the equilibrium constant, Kb is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.

[tex]CH_3NH_2(aq) + H_2O(l)[/tex]  → [tex]CH_3NH^{3+}(aq) + OH^- (aq)[/tex]

Thus, the expression for the equilibrium constant, Kb fo the above reaction can be written as follow:

[tex]Kb = [CH_3NH^{3+}] [OH^-] / [CH_3NH_2][/tex]

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Volume=1600cm³=1.6dm³=1.6L

Temperature=25°C=273+25=298K

Pressure=75000Pa

Now

Apply ideal gas equation

The number of moles needed is

n=48.43mol.

Calculations

Given the values of the volume and temperature, we would convert them to the required units.

Volume=1600cm³=1.6dm³=1.6L

Temperature=25°C=273+25=298K

Pressure=75000Pa

We would use the ideal gas equation

PV=nRT

n=PV/RT

n=75000(1.6)/8.314(298)

n=48.43mol

The objects that could hit the atoms in the model shown are neutrons.

A chain reaction is a reaction that is able to sustain itself. In this case, when the neutrons collide with the fissile nucleus, more neutrons are produced which collides with more fissile nuclei thereby sustaining the reaction.

Thus, the objects that could hit the atoms in the model shown are neutrons.

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The pressure of the compressed tank that was initially filled with hydrogen gas and has a pressure of 100kPa is pressure in the 250mL tank increases.

Boyle's law states that the observation that the pressure of an ideal gas is inversely proportional to its volume at constant temperature.

According to this question, a 1 L compressed tank is filled with hydrogen gas and has a pressure of 100kPa.

If all of the hydrogen gas is removed from the tank and pumped into a 250mL tank, which is smaller in volume, the pressure in the 250mL tank increases.

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Answer: Substance B has stronger bonds, and it takes more energy to undergo a phase change.

Explanation:

Substances with higher boilings have stronger intermolecular forces, and thus require more energy for phase changes to occur.

(a) The displacement of point P at time t=0.10s is determined as +2cm.

(b) The displacement of point P at time t=0.20s is determined as -2cm.

Displacement is the change in position of an object. It is obtained from the product of velocity and time of motion.

x = vt

x = 10 m/s x 0.1 s = 1 m

Each wave will travel 1 m to the right or to the left, depending on the initial direction.

wave B and C superimposed and the displacement will be between A and D.

Amplitude of A = - 2cm

Amplitude of D = + 4cm

Displacement of point P = 4 cm - 2 cm =  2cm

x = 10 m/s x 0.1 s = 2 m

Each wave will travel 2 m to the right or to the left, depending on the initial direction.

Displacement of point P = (amplitude B + amplitude C) + (amplitude A + amplitude D)

Displacement of point P= (2cm - 2cm) + (2 cm - 4cm)= -2cm

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Answer:

About energy transfers:

Explanation:

When there is an energy transfer energy is neither created, nor destroyed. This means when that when one energy store decreases, one or more others must increase.

1mol H_2O requires 44kJ heat

Moles of water

Heat required

As per the reaction given

Moles of H_2O=1

Moles of water in 9g

∆H

The pH of the solution is 4.

pH value is the measure of the acidity and basicity of a solution.

It measures the [H+] ion liberated by an acid when dissolved in a solution.

It has a range of 0 to 14 , where 0 to 6.9 indicates acidity , 7 represents neutral solution , More than 7 up to 14 indicates alkaline solutions.

pH value is also used to predict the completion of a reaction .

It is given in the question that

The value of pOH = 10

pH = ?

It is known that the sum of pH and pOH is equal to 14.

pH + pOH = 14

pH + 10 = 14

pH = 4

Therefore the pH of the solution is 4.

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Answer:

Here's your answer.

M(C3H8) = 44 g/mol

n(C3H8) = 5000 (g)/44 (g/mol) = 113,6 mol

[tex] N = n \times N_{a} = 113,6 \times 6,02 \times {10}^{23} \\ \\ = 684,1 \times 10 ^{23} \sf{molecules} [/tex]

Textiles for clothes are also sometimes finished with chemicals, for example, to stiffen them and make them wrinkle-free. Chemicals in their nanoforms are helping make textiles more resistant to water, stains, wrinkles, bacteria and mould. Some of the chemicals can be harmful.

☆...hope this helps...☆

_♡_mashi_♡_

The overall order of the reaction is 3 and the rate law for the reaction is rate =  [A]^n [B]^m [C]^l

1) The order of reactant A is first order reactant because a first-order reaction can be defined as a chemical reaction in which the reaction rate is linearly dependent on the concentration of only one reactant.

The order of reactant B is second order reactant because a second order reaction is a type of chemical reaction that depends on the concentrations of one-second order reactant or two first-order reactants.

Thus, the overall order of the reaction is 3.

2) The rate law in this reaction is;

rate =  [A]^n [B]^m [C]^l

But in this question, since the reactant C is zero order, then it will be simplified to; rate = k[A][B]² .

3) When we plug in the initial concentrations of A and B, we will get the rate constant of the problem which is k = 20.

4) The initial rate when [A]0=4.87 mmol⋅L−1 , [B]0=0.184 mmol⋅L−1 , and [C]0=12.0 mmol⋅L−1 is;

Rate = 20 * 4.87 * 0.184²

Rate = 3.3

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Answer:

It depends on what type of test your speaking of, is it a state exam?

If you are passing a class and fail a test you will still pass. If you fail a class you do not need to take it again if you don't want to but you would have to take another class instead.