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Vikentia [17]
2 years ago
8

An atom is neutral. Its nucleus contains two protons and two neutrons. How

Chemistry
2 answers:
Kay [80]2 years ago
5 0

Answer:

B it has 2 electrons

Explanation:

garri49 [273]2 years ago
3 0

Answer:

we need to know which atom you're talking about and then you need to say what the mass number is then we can tell how many electrons there are.

(I think)

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How many liters of oxygen are required to react completely with 14.8 mol of Al?
Bond [772]

Answer:

296 L  

Explanation:

We will need a balanced equation with moles, so let's gather all the information in one place.

                  4Al + 3O₂ ⟶ 2Al₂O₃

n/mol:        17.4

1. Moles of O₂

n = \text{17.4 mol Al}\times \dfrac{\text{3 mol O}_{2}}{\text{4 mol Al}}= \text{13.05 mol O}_{2}

2. Volume of O₂

You haven't given the conditions at which the volume is measured, so I assume it is at STP (0 °C and 1 bar).

At STP the molar volume of a gas is 22.71 L.

V = \text{13.05 mol}\times \dfrac{\text{22.71 L}}{\text{1 mol }}= \textbf{296 L}

8 0
3 years ago
can anyone answer these questions? this is due today so if anyone can help that’d be greatly appreciated
Olegator [25]

Answer:

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Explanation:

3 0
3 years ago
Help me please!!!!!!!!?????
kirill [66]

Answer:

i believe its A or D

Explanation:

sorry is its wrong

hope it helps

4 0
3 years ago
What is the percent composition of Br in CuBr3?
tekilochka [14]

Answer:

about 79% (79.04369332 to be exact)

Explanation:

Percent composition=(Molar mass of element x amount of it)/Molar mass of compound x 100

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6 0
3 years ago
. Explaining How is the legislative branch organized, and<br>what are its functions?​
Fed [463]

Answer:

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Explanation:

3 0
3 years ago
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