43. 5 g of cesium explosively reacts with water to form hydrogen gas and cesium hydroxide. How many moles of hydrogen gas were formed?

Answer:

See below:Explanation:

P1V1/T1  = P2V2/T2

P1V1/T1   *   T2 / P2   = V2

15.17 *641.68 / 243.41    *  561.06/70.3  = 319.17 Liters

Answer:

Just like with any other reaction, balancing the equation for the reaction is important so that people can know all the inputs and outputs, and know how much of each input (reactant) is needed to produce a certain amount of product.

Answer:

225.0mL

Explanation:

Volume and Pressure are inversely related. So if the pressure is doubled the volume will be half of its original volume.

The resistance and the effort force are used to calculate the mechanical advantage. Arranging the threads of the screw closer together will increase the mechanical advantage. Thus, option C is correct.

Mechanical advantage is the ratio of the output force to the input force. It allows easier task performance by obeying the conservation of mass.

The closer threads of the screws make the distance covered to be more, and the force applied will be multiplied which will be a mechanical advantage over threads placed far apart.

Therefore, option C. threads located closer have more mechanical advantages.

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Answer: B longer wave

Explanation:

because

Answer:

0.00025

Explanation:

Divide the volume by 1000

The mole ratio of iron to copper is 1 : 1, thus, 1.31 g of iron is required to produce 1.5 g of copper.

The reaction between iron and copper(ii) sulfate is a redox displacement reactions in which copper is displaced from its salt by iron.

The equation of the reaction is given below:

[tex]CuSO_4 + Fe \rightarrow FeSO_4 + Cu[/tex]

The mole ratio of both reactants and product is 1 : 1

molar mass of copper sulfate = 160 g

molar mass of Cu = 64

molar mass of iron = 56 g

moles of Cu in 1.5 g = 1.5/64 = 0.00234

mass of iron required = 0.00234 × 56 = 1.31 g of iron

Therefore, from the mole ratio of iron to copper, 1.31 g of iron is required to produce 1.5 g of copper.

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Answer:

Cholesterol is a waxy substance found in your blood. Your body needs cholesterol to build healthy cells, but high levels of cholesterol can increase your risk of heart disease. With high cholesterol, you can develop fatty deposits in your blood vessels.

Explanation:

Answer:

Cholesterol is a waxy substance found in your blood. It can affect our bodies in many ways. If you have high levels of cholesterol it can increase your risk of heart disease. Your body needs it to help build healthy cells.

Explanation:

Hope this helps:)...if not then sorry for wasting your time and may God bless you:)

The pH of a solution that has a hydrogen ion concentration [H+] of molarity 0.065M is 1.19.

The pH of a solution refers to the power of hydrogen in the solution i.e. the degree of acidity or alkalinity of the solution.

The pH of a solution with known concentration can be calculated using the following formula:

pH = - log [H+]

According to this question, a solution has a molarity of 0.065M. The pH is as follows:

pH = - log [0.065]

pH = 1.19

Therefore, the pH of a solution that has a hydrogen ion concentration [H+] of molarity 0.065M is 1.19.

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Carbondixoide gas is the type of greenhouse gas which is more difficult to control and eliminate.

Carbon dioxide is the greenhouse gas that is emitted through human activities which can be controlled by reducing human activities which is impossible for us because large number of products are produced from which carbondioxide gas is released.

So we can conclude that carbondixoide gas is the type of greenhouse gas which is more difficult to control and eliminate.

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Answer:

C. 550

Explanation:

HGD

Answer:

C

Explanation:

Trust

The partial pressure of oxygen given the total barometric pressure is : 108.15 mmHg

Given data :

Total barometric pressure = 515 mmHg

Assuming oxygen percentage = 21%

Barometric pressure dry at 37°C

Applying  the relation below

Partial pressure = oxygen percentage * Barometric pressure

                          = 21% * 515 mmHg

                          = 108.15 mmHg

Hence we can conclude that the partial pressure of oxygen is 108.15 mmHg.

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Answer:

Explanation:

They react violently and can be used to make bombs

Pure or very concentrated solutions of hydrogen peroxide are considered to be dangerous because they can be highly reactive and can cause severe chemical burns.

A solution is a homogeneous mixture of two or more substances, where the substances are uniformly distributed throughout the mixture.

Hydrogen peroxide is a powerful oxidizer, which means that it can react with many other substances, including organic materials such as skin and clothing.

In conclusion, pure or very concentrated solutions of hydrogen peroxide are considered to be dangerous because of their high reactivity and potential to cause chemical burns, fires, and explosions.

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Answer:

Olivia-anthroponosis

Although-Ringworm is not life-threatening, whereas most others are.

Black Death-It was caused by bacteria instead of a virus.

Explanation:

Answer:

The empirical formula is CH2O, and the molecular formula is some multiple of this

Explanation:

In 100 g of the unknown, there are 40.0⋅g12.011⋅g⋅mol−1 C;  6.7⋅g1.00794⋅g⋅mol−1 H; and  53.5⋅g16.00⋅g⋅mol−1 O.

We divide thru to get, C:H:O = 3.33:6.65:3.34. When we divide each elemental ratio by the LOWEST number, we get an empirical formula of CH2O, i.e. near enough to WHOLE numbers. Now the molecular formula is always a multiple of the empirical formula; i.e. (EF)n=MF.So 60.0⋅g⋅mol−1=n×(12.011+2×1.00794+16.00)g⋅mol−1.Clearly n=2, and the molecular formula is 2×(CH2O) = CxHyOz.

i believe this would be the answer

Arsenic trioxide.

Chlorine.

Hydrogen cyanide.

Nitrous oxide.

Phosgene.

Potassium cyanide (analytical reagent and purified)

Sodium arsenate (analytical reagent)

Sodium cyanide (analytical reagent)  

Hope this helps! :)

Answer:

1) Sarin gas

2) Potassium cyanide

3) Botulinum toxin

4) Batrachotoxin

5) Dimethyl Cadmium

6) Fluoroantimonic Acid

7) Arsine

8) Ricin

9) Strychnine

10) Nicotine

Explanation: That's it mate.

hope it helps

Answer:

The higher the activation energy, the slower the chemical reaction will be.

Explanation:

your welcome

Answer:

The activation energy of a chemical reaction is closely related to its rate. Specifically, the higher the activation energy, the slower the chemical reaction will be. This is because molecules can only complete the reaction once they have reached the top of the activation energy barrier.

Explanation: Each and every chemical reaction require some amount of activation energy to begin. The activation energy enables the reactants to move and overcome forces of repulsion. The subsequent collisions between atoms facilitates the breaking of existing bonds and the formation of new ones.

Answer:

35 L

Explanation:

To solve this problem we use the Ideal Gas Law equation: PV=nRT

We only have to convert one unit, which is celsius to Kilometers.

P=1.70 atm

V=X

n=2.3

R=.08206

T=41+273=314K

1.70(x)=2.3(.08206)(314)

1.70x=59.26

x=34.6L

Using 2 sig figs = 35L

Answer:

12.665 mols

Explanation:

You can just plug into the equation finding n, which is moles. The equation would be n = PV/RT. atm is 9.16, Volume is 42, 0.08206 or 0.0821 in this case is the constant, and T is the temperature which is 370 Kelvin.

Answer:

The Answer should be Endothermic reaction

Explanation:

Reactions in which energy is absorbed are called Endothermic reactions.

The moles of water that are produced from 373 moles of ammonia present in any chemical reaction is 746 moles.

Stoichiometry of the reaction gives idea about the amount of entities present in any chemical reaction before and after the reaction.

Given chemical reaction is:

3Al + 3NH₄ClO₄ → Al₂O₃ + AlCl₃ + 3NO + 6H₂O

From the stoichiometry of the reaction it is clear that:

3 moles of Al = produces 6 moles of H₂O

373 moles of Al = produces 6/3×373 = 746 moles of H₂O

Hence required moles of water is 746 moles.

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Answer:

Natural selection is a process in which organisms are fit to adapt and live in the environment. Natural selection was an idea developed by Charles Darwin, Darwin contributed this idea when he was studying birds and tortoises at the Galapagos Islands. He then wrote his famous book, Origin of Species. Evolution is also very similar, evolution is a process in which organisms reproduce and mutate in order to survive and adapt. As you can see, natural selection and evolution are alike in many ways.

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•Expert•

Brainly Community Contributor

seeing that we already know the number of a dozen eggs is 12, after finding out the numbers of atoms in one egg, we multiply by 12.

Simply put, an Atom is the smallest unit of life, it should be noted that everything arround us is composed of an atom.

In summary, atoms are very small, they can only be seen using powerful microscope.

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Answer:

D because i say so and i am just here to get awnsers