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DedPeter [7]
3 years ago
8

Can someone PLEASE help me with this chemistry assignment

Chemistry
1 answer:
xeze [42]3 years ago
5 0

Make it like a ice dissolving in a cup of water but draw salt inside of the ice

Think of it as a ice cube but with salt, it's salt dissolving in the water so it's like the salt will dissolve and the ice would melt

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Sublimation occurs more readily when definite weather circumstances are present such as low relative humidity and dry winds. Sublimation also occurs more at higher altitudes where the air pressure is less than at lower altitudes and energy such as strong sunlight is also needed. Sublimation happens a lot in the south face of Mt. Everest which have low temperatures, strong winds, intense sunlight, very low air pressure and the recipe for sublimation to occur.
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3 years ago
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In an ion with an unknown charge, the total mass of all the electrons was determined to be 2.19 ✕ 10−26 g, while the total mass
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Answer:

\large \boxed{\text{Fe$^{{2+}}$}}

Explanation:

1. Number of electrons

\text{Number of electrons} = 2.19 \times 10^{-26}\text{ g} \times \dfrac{\text{1 electron}}{9.109 \times 10^{-28}\text{ g}} = \text{24 electrons}

2. Number of protons

\text{Number of protons} = 4.34 \times 10^{-23}\text{ g} \times \dfrac{\text{1 proton}}{1.673 \times 10^{-24}\text{ g}} = \text{26 protons}

3. Identify the ion

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A neutral atom of iron would have 26 electrons.

The ion has only 24 electrons, so it has lost two. The ion must have a charge of +2.

\text{The symbol for the ion is $\large \boxed{\textbf{Fe$^{\mathbf{2+}}$}}$}

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3 years ago
A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as wel
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Answer:

V equals four-thirds times pi times r cubed

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A.566 kJ

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C.212 kJ

D.755 kJ

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Explanation:

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The answer is D they have 4 neutrons
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