Part B
A change of 1.0 pH unit corresponds to how much of a change in (H30+)?
O 10x change in (H30+)
O 100x change in H30+)
O 20x change in (H30"]
O 1.0x change in (H20"]
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Answer:

Barium Cyanide, Ba(CN)2, is formed by passing anhydrous hydrocyanic acid over cooled barium hydroxide crystals, and dissolves in the water of crystallisation of the hydrated baryta. With anhydrous barium oxide or hydroxide too vigorous a reaction takes place and the cyanide is decomposed.

Answer:

Explanation:

Look here,

3CuCl2 + 2Al --> 2AlCl3 + 3Cu

On

LHS = 3Cu , 3 × Cl2 = 6Cl and 2Al

RHS = 2Al , 2 × Cl3 = 6Cl and 3Cu

Hence,

LHS = RHS and the above equation is balanced

Answer:

The correct answer is -

(a) spontaneous;

(b) nonspontaneous;

(c) spontaneous;

(d) nonspontaneous;

(e) spontaneous;

(f) spontaneous

Explanation:

(a) Liquid water freezing at a temperature below its freezing point.

in this reaction, there is no requirement of external energy or force to make it possible due to the fact that the temperature of the environment is less than the freezing point of water. So, the water will spontaneously freeze.

(b) Liquid water freezing at a temperature above its freezing point. the melting of ice takes place with the increase or absorbing the heat which is a nonspontaneous,

(c) The combustion of gasoline produces gas molecules, and release energy which means it is an exothermic reaction, the combustion of gasoline is a spontaneous reaction.

(d) A ball is thrown into the air is not a natural process and it requires force or energy to be complete and works against gravity, Therefore, it is a nonspontaneous reaction.

(e) A raindrop falling to the ground is a naturally occurring reaction without any external force and in the direction of gravity, thus it is a spontaneous reaction.

(f) Iron rusting in a moist atmosphere is a spontaneous reaction as it does not require energy to occur and it naturally takes place. It is a redox reaction.

Answer:

17.4 kJ

Explanation:

Answer:

the sun's Rays strike Earth surface most directly at the Equator this focuses the race on a small area because be raised hit more directly the area is heated more

Explanation:

yw

Answer:

copper

Explanation:

Copper is used as a base metal to mix with gold and to make it stronger, harder and less brittle in nature. It acts as the best alloy to make ornaments. Since the Silver layer gets easily oxidized in nature and gets easily corroded, copper remains the best choice as a metal to mix with Gold.

Answer:

the hypothesis is false

Explanation:

it I rejected because the hypothesis has been tested severally and the answer still proves to be wrong

Answer:

probably the third option: The hypothesis is false

Explanation:

Answer:

9.5 mol

Explanation:

Let's consider the unbalanced equation for the combustion of tetraethyl-lead (IV).

Pb(C₂H₅)₄ + O₂ ⇒ PbO + CO + H₂O

Pb atoms are balanced. We will balance C atoms by multiplying CO by 8.

Pb(C₂H₅)₄ + O₂ ⇒ PbO + 8 CO + H₂O

Then, we will balance H atoms by multiplying H₂O by 10.

Pb(C₂H₅)₄ + O₂ ⇒ PbO + 8 CO + 10 H₂O

Finally, we get the balanced equation by multiplying O₂ by 9.5.

Pb(C₂H₅)₄ + 9.5 O₂ ⇒ PbO + 8 CO + 10 H₂O

All in all, we need 9.5 moles of O₂ to burn 1 mole of Pb(C₂H₅)₄.

.500 mol ( 6.02x10^23 molecules/1 mol) = 3.01x10^23        

Answer:

Maybe c?

Explanation:

John Dalton was an English chemist, and Marie Curie was a physicist and chemist. The ideas of John Dalton and Marie Curie were based on scientifically gathered evidence. Thus, option C is correct.

John Dalton and Marie Curie are famous physicists and chemists. John Dalton is most known for introducing the theory of the atom and color blindness. He gave the theory of atomism based on the experimental setup.

Marie curie hugely contributed to the discovery of radioactivity and cancer research. She and her husband experimented and searched for the radioactive material.

Aristotle was a philosopher and established the relation between the various fields of sciences. He originated the idea of Alchemy by combining the four elements.

Therefore, John Dalton and Marie Curie proposed ideas based on research.

Learn more about Marie Curie here:

https://brainly.com/question/23920465

#SPJ2

Answer:

Amount of gas

Explanation:

The combined gas law has to do with pressure, volume, and temperature. All of them can be a variable that you have to solve for. However, amount of gas is not a variable you can solve for, which means it must remain constant.

Answer:

mALCL3 =1157 G

Explanation:

I think so

Answer:

70 grams

Explanation:

that's my answer

Answer: 30.08 g/mol

Explanation:

C2= 12.01 H6=1.01

12.01(2) + 1.01(6) =

24.02 + 6.06 =

30.08 g/mol

Answer:

Chemical reactions, chemistry, science as inquiry and data analysis. ... Students burn steel wool in both an open and closed environment to understand ... The difference in mass for this small sample of steel wool will be very small. ... careful attention to the balloon! 9. When rusting occurs the properties of the metal changes.

Explanation:

Answer:

About 200 moles water

Explanation:

O2 is the limiting reactant, and it allows for 193.75 moles of water to be produced. Good luck on your assignment!

Answer:

Option (d) is correct.

Explanation:

Let [tex]x=10^2[/tex] and [tex]y=10^{-3}[/tex].

We need to find the value of [tex]\dfrac{x}{y}[/tex].

Put the values of x and y such that,

[tex]\dfrac{x}{y}=\dfrac{10^2}{10^{-3}}\\\\=10^2\times 10^3\ (As\ \dfrac{1}{x^{-a}}=x^a)\\\\=10^5\ (As\ x^a\times x^b=x^{ab})\\\\=1\times 10^5[/tex]

So, the required answer is equal to [tex]1\times 10^5[/tex]. Hence, the correct option is (d).

Answer:

Yes you can!

Explanation: Here is one method i did in school you can put a cup of the salted lemonade into a big container seal it off and put plastic inside heat it up and the water will evaporate and leak from the sides while the salt will stay in the cup. Pls give me brainliest

Answer:

P₂ ≅ 100 atm (1 sig. fig. based on the given value of P₁ = 90 atm)

Explanation:

Given:

P₁ = 90 atm                    P₂ = ?

V₁ = 18 Liters(L)              L₂ = 12 Liters(L)      

=> decrease volume => increase pressure

=> volume ratio that will increase 90 atm is (18L/12L)                                                                  

T₁ = 272 Kelvin(K)          T₂ = 274 Kelvin(K)

=>  increase temperature => increase pressure

=> temperature ratio that will increase 90 atm is (274K/272K)

n₁ = moles = constant    n₂ = n₁ = constant

P₂ = 90 atm x (18L/12L) x (274K/272K) = 135.9926471 atm (calculator)

By rule of sig. figs., the final answer should be rounded to an accuracy equal to the 'measured' data value having the least number of sig. figs. This means P₂ ≅ 100 atm based on the given value of P₁ = 90 atm.

Answer:

1.The reaction that opposes the change

Explanation:

Consider the reaction;

A + B ⇄ C + D

If a constraint such as a change in temperature, pressure or volume is imposed on this chemical system in dynamic equilibrium, the equilibrium position will shift so as to annul the constraint.

This shift in the equilibrium position will favour either the forward or reverse reaction depending on the type of constraint imposed on the system.

Hence, If a chemical system is at equilibrium, any change in the system will always result in an increase of the reaction that opposes the change.

Answer:

NaOCl + H2O → HOCl + NaOH

so the mole fraction is = moles of NaOCl/(moles of NaOCl+moles of H2O)

so for 1.35 NaOCl it will require 1.35 moleof H2O

mole fraction = 1.35/(1.35+1.35)

mole fraction = 1/2 =0.5

is it correct i d ek but i tried :)

The mole fraction of the NaOCl is 0.0237

We'll begin by calculating the mole of solute (NaOCl) in the solution.

Mole = Molality x mass (Kg) of water

Mole of NaOCl = 1.35 × 1

Mole of NaOCl = 1.35 mole

Next, we shall determine the mole of water.

Mole = mass / molar mass

Mole of water = 1000 / 18.01

Mole of water = 55.52 moles

Finally, we shall determine the mole fraction of NaOCl.

Mole fraction = mole / total mole

Mole fraction of NaOCl = 1.35 / 56.87

Mole fraction of NaOCl = 0.0237

Learn more about mole fraction:

https://brainly.com/question/26051051

Answer:

+43.32 kJ

Explanation:

Step 1: Write the thermochemical equation for the decomposition of sodium nitride

2 Na₃N ⇒ N₂ + 6 Na ΔH = +42.7 kJ

Step 2: Calculate the moles corresponding to 168.4 g of Na₃N

The molar mass of Na₃N is 82.98 g/mol.

168.4 g × 1 mol/82.98 g = 2.029 mol

Step 3: Calculate the heat needed for the decomposition of 2.029 moles of Na₃N

According to the thermochemical equation, 42.7 kJ are required for the decomposition of 2 moles of Na₃N. The heat needed for the decomposition of 2.029 moles of Na₃N is:

2.029 mol × 42.7 kJ/2 mol = 43.32 kJ

Answer: I think A is right

Explanation: Photosynthesis needs light so it is endothermic,

Oxygen in water is oxidised and Oxygen is released in process.

Free energy is temperature dependent. But also Carbo dioxide

involves reaction. You needs to find out Calvin-Benson cycle

Answer:

1.47 M

Explanation:

First we convert 86.00 g of NaCl into moles of NaCl, using the molar mass of NaCl:

Then we convert 1000 mL into liters:

Finally we can calculate the molarity of the solution:

Answer:

capillaries

Explanation:

hope it helps if I'm not tell me right away.

Answer:

Carotid artery, Jugular veins

The chambers are explained below.

Explanation:

THE BLOOD VESSELS

The carotid artery carries red blood (oxygenated) to the head and the neck region and that obviously include the brain via the aorta. To be precise the internal carotid artery supplies oxygenated red blood cells to brain. The jugular veins carry deoxygenated red blood cells from the head back to the heart via the superior vena cava. The most important function of the jugular vein is to drain deoxygenated blood from brain.

THE CHAMBERS

The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle which also pumps the same oxygenated blood to the rest of the body through the aortic valve (aorta).

The right atrium receives deoxygenated blood from the body via the vena cava  and pumps the deoxygenated blood to the right ventricle which pumps the deoxygenated blood to be oxygenated by the lungs via the pulmonary valve (pulmonary artery).

CONCLUSION

The oxygenated red blood cells from the lung pass through the pulmonary vein through the left atrium to the left ventricle through the carotid artery (internal carotid artery) via the aorta to the brain and

The deoxygenated red blood cells in the brain are drained through the jugular vein via the superior vena cava to the right atrium, which pumps the deoxygenated blood to the right ventricle. From here the deoxygenated blood is pumped to the lungs via the pulmonary artery for oxygenation.

This is my answer, thus if I got your question right.

Answer:

it is b

Explanation:

b is the quarks for a proton

Answer:

B

Explanation:

Answer:

n = 0.045 mol.

Explanation:

Hello there!

In this case, according to the given problem, we can firstly set up the ideal gas equation as shown below:

[tex]PV=nRT[/tex]

Thus, as we are asked to calculate the moles, we proceed as follows:

[tex]n=\frac{PV}{RT}[/tex]

Therefore, we plug in the given data to obtain:

[tex]n=\frac{760mmHg*\frac{1atm}{760mmHg}*1.0L}{0.08206\frac{atm*L}{mol*K}*273K} \\\\n=0.045mol[/tex]

Best regards!