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ivolga24 [154]
3 years ago
8

12. What is the mass number of an atom that has 4 protons, 4 electrons, and 5 neutrons?

Chemistry
1 answer:
NeTakaya3 years ago
7 0

Answer:

9

Explanation:

mass number = protons + neutrons

= 4 + 5 = 9

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It would be True

Explanation:

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B. The collisions release heat, which results in the heating and subsequent melting, sinking, and rising of materials.

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3 years ago
If the concentrated form of blood expander is 9.0 mol/L and one of your companions, a nurse, tells you that you need to have a f
I am Lyosha [343]

Answer:

0.032 L or 32 mL

Explanation:

Use the dilution equation M1V1 = M2V2

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3 years ago
Find the number of moles of water that can be formed if you have 210 mol of hydrogen gas and 100 mol of oxygen gas.
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<span>The answer is 200 mol of water. The balanced reaction is 2(H2) + (O2) = 2(H2O) The limiting reactant is O2 as it will be completely consumed first, before hydrogen gas. Hydrogen gas would need at least 105 mol oxygen gas to be consumed; in excess of the 100 mol O2. Looking at the stoichiometric coefficients, the ratio between water and oxygen is 2:1. Therefore, the water produced would be 200 moles.</span>
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