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3 years ago

Why does the ozone layer important to life on earth?

Chemistry

1 answer:

ludmilkaskok [199]3 years ago

7 0

Protects us from the Suns rays

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Aluminum has a specific heat capacity of 0.902 J/g °C. How much energy is released when 1.0 kg

Ghella [55]

Answer:

The energy released is 13.53j

Explanation:

Q = Mc∆temp.

Q = energy

M = mass

c = specific heat capacity

∆temp. = change in temperature

Q = 1 x 0.902 x (35 - 20)

Q = 0.902 x 15 = 13.53j

8 0

4 years ago

An atom with 5 protons, 6 neutrons, and 5 electrons has an atomic mass of amu.

Licemer1 [7]

Answer:

Explanation: 11

7 0

3 years ago

Genetic mutations are___ harmful A) always B) usually C) sometimes D) never

beks73 [17]

C)

Explanation:

Some genetic mutations, like being able to drink milk are beneficial. While others, like sickle cell anemia. I know you didn’t ask, but it’s just for future reference.

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3 years ago

Read 2 more answers

How do I do lewis dot structures with multiple elements

Nutka1998 [239]

Answer:

5:59

Dot structures II: Multiple bonds (video)

Explanation:

try this video! hope it helps!

8 0

3 years ago

Sodium sulfate dissolves as follows: Na2SO4(s) → 2Na+(aq) + SO42- (aq). How many moles of Na2SO4 are required to make 1.0 L of s

maxonik [38]

Answer: The number of moles of $Na_2SO_4$ is 0.05 moles.

Explanation:

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

We are given:

Molarity of solution = 0.10 mol/L

Volume of solution = 1 L

Putting values in above equation, we get:

$0.10mol/L=\frac{\text{Moles of sodium}}{1.0L}\\\\\text{Moles of sodium}=0.10mol$

The chemical reaction for the ionization of sodium sulfate follows the equation:

$Na_2SO_4(s)\rightarrow 2Na^+(aq.)+SO_4^{2-}(aq.)$

By Stoichiometry of the reaction:

2 moles of sodium ions are produced by 1 mole of sodium sulfate

So, 0.10 moles of sodium ions will be produced by = $\frac{1}{2}\times 0.1=0.05moles$ of sodium sulfate.

Hence, the number of moles of $Na_2SO_4$ is 0.05 moles.

8 0

3 years ago