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Ghella [55]
3 years ago
6

Which of the following are true?

Chemistry
1 answer:
serious [3.7K]3 years ago
6 0

Answer:

D.fusion reactions absorb tremendous amounts of energy.

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Potassium dihydrogen phosphate KH2PO4 and sodium nitrate NaNO2 solutions are mixed together in a beaker. Determine the net ionic
Aleksandr-060686 [28]

Potassium dihydrogen phosphate (KH2PO4) and sodium nitrate (NaNO2)

Molecular equation:

KH₂PO₄ (aq) + 3NaNO₂(aq) → Na₃PO₄(s) + KNO₂(aq) + 2HNO₂ (aq)

The net ionic equation is:

3Na⁺(aq) + PO₄⁻(aq) → Na₃PO₄(s)

The rest of the ions are spectator ions and tend to cancel out on both sides of the reaction.



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3 years ago
What makes something a science
serg [7]
Measurements. well , that’s what my science teacher told me.
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3 years ago
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How many moles of "02" are in a 192g sample of O2? *<br> 1<br> 2<br> 3<br> 4<br> 5<br> 6<br> 7
Zarrin [17]

Answer: The number of moles of O_2 are 6.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

Given mass = 192 g

Molar mass = 32 g/mol

\text{Number of moles}=\frac{192g}{32g/mol}=6mol

The number of moles of O_2 are 6.

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In the gas phase, the energy difference between a cesium atom and its most stable ion is referred to as
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Cesium is in the first group, so it forms an ion with a charge of +1. The change that cesium atoms undergo when they are in the gaseous state to form gaseous ions is known as the ionization energy. The ionization energy, by definition, is the energy required to remove one mole of electrons from one mole of gaseous atoms to form one mole of +1 ions from the atoms.
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4 years ago
31. The mass number of a nucleus is :
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I think b is correct.

Explanation:

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