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2 years ago

Write the symbol of another isotope of lead with 132 neutrons.

Chemistry

1 answer:

Ivahew [28]2 years ago

5 0

Answer:

Pb^+7

Explanation:

I placed the carrot there to signify the +7 is supposed to be small. It is plus seven because seven nuetrons are added

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Answer:

mitosis is Exampel of cell divison

Explanation:

mitosis is the second stage of cell divison or somatic cell divison

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2 years ago

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vagabundo [1.1K]

Answer:

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2 years ago

Which of the following describes what occurs as a gas becomes a liquid?

lora16 [44]

As the gas cools it condenses and becomes a liquid its atoms also become smaller

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3 years ago

A mixture of helium, nitrogen, and oxygen has a total pressure of 752 mm Hg. The

NISA [10]

Answer: The partial pressure of oxygen in the mixture is 321 mm Hg

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

$p_{total}=p_{He}+p_{N_2}+p_{O_2}$

Given : $p_{total}$ = total pressure of gases = 752 mm Hg

$p_{He}$ = partial pressure of Helium = 234 mm Hg

$p_{N_2}$ = partial pressure of nitrogen = 197 mm Hg

$p_{O_2}$ = partial pressure of oxygen = ?

Putting in the values we get:

$752mmHg=234mmHg+197mmHg+p_{O_2}$

$p_{O_2}=321mmHg$

The partial pressure of oxygen in the mixture is 321 mm Hg

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3 years ago

How many moles of Cu do you need to react with 12 moles of O2? 2Cu(s) + O2(g) 2CuO(s)

zzz [600]

Answer:

24 mol Cu

General Formulas and Concepts:

Chemistry

Stoichiometry

Explanation:

Step 1: Define

RxN: 2Cu (s) + O₂ (g) → 2CuO (s)

Given: 12 moles O₂

Step 2: Stoichiometry

$12 \ mol \ O_2(\frac{2 \ mol \ Cu}{1 \ mol \ O_2} )$ = 24 mol Cu

Step 3: Check

We are given 2 sig figs.

Our final answer is in 2 sig figs, so no need to round.

3 0

2 years ago