CHEMISTRY HIGH SCHOOL

Which factors affect the flow of electric charge? Check all that apply.voltage
ampere
ohm
resistance
volt

Answers

Answer 1

Answer: the answers are voltage and resistance

Answer 2

Answer:

Answer:

It is Voltage and Resistance

Explanation:

I got it correct on Edg2022 (picture above) ^^

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If the Ka of a monoprotic weak acid is 5.4 × 10-6, what is the pH of a 0.25 M solution of this acid?

Answers

The first step is to write the balanced equation of the dissociation of the monoprotic weak acid. This can be assumed to have 1:1 stoichiometric relationships, so the equation and ICE chart are given by:

      HA ---> H^+ + A^-
initial    0.25 0 0
change       -x x x
equilibrium    0.25-x x x

This gives an expression for Ka given by:

Ka = (x)^2/(0.25-x) = 5.4x10^-6
x = 1.159x10^-3 = [H+] = [A-]

pH = -log[H+] = -log[1.159x10^-3] = 2.936

How much heat is given off when 8 g of hydrogen reacts in: 2H₂ + O₂ → 2H₂O; ΔH = -115.60 kcala. -57.8 kcal
b. -115.6 kcal
c. -173.4 kcal
d. -231.2 kcal
e. -462.4 kcal

Answers

ΔΗ= -115.6 kJ/mol
H2 has a Mr of 2, so as mol=mass/mr we can work out that there are 4 moles of H reacting

Therefore we multiply -115.6 by 4 = -462.4

Changing the pressure of a system has the highest effect on a substance in which phase?a. gas
b. solid
c. liquid
d. plasma

Answers

The best answer to the question presented above would be letter a. Changing the pressure of a system has the highest effect on a gaseous phase. Solids and liquids under pressure make little difference, while gas molecules have many behaviors due to change in pressure.

The positively charged particle in an atom's nucleus is called the

Answers

It is called the proton

What energy resource can be used instead of fossil fuel

Answers

We could use solar power, wind power, geothermal power, hydroelectric power, or nuclear power. There are probably more but this is what I can think of off the top of my head. I hope this helps. Let me know if anything is unclear.

Yeast lacks of membrane bound nucleus. The onion skin cell has one