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kicyunya [14]
3 years ago
5

I need help please thanks

Chemistry
1 answer:
harina [27]3 years ago
7 0

The answer is A because when an atom has more electrons in its outer shell, It becomes more reactive

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Mixtures of hydrogen and oxygen in varying concentrations can be sparked to produce water. Define mixture and compound, and then
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Explanation:

Mixture is the physical Combination Of two or Substance

Example

a mixture of sugar and water.

Compound is the chemical combination of two or more metals.

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a mixture of hydrogen and water.

A mixture of hydrogen and oxygen forms water or H2O

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An inclined surface with one or two sloping sides forms a machine called a?
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Calculate the percentage by mass of chlorine in Cobalt (II) chloride (cocl2)​
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Divide the mass of chlorine by the molar mass of cobalt chloride, then multiply by 100.

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Mass of Chlorine in Cobalt Chloride.

Percent Composition of Chlorine.

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Carbon dioxide and helium which has a higher van der waals force of attraction between molecules ​
raketka [301]

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Helium is a small spherical atom with only a two electrons, so its atoms have quite weak attractions to each other.

CO₂ is a large linear molecule. It has more electrons than helium, so the attractive forces are greater. Furthermore, the molecules can align themselves compactly side-by-side and maximize the attractions (see below).

For example. CO₂ becomes a solid at -78 °C, but helium must be cooled to -272 °C to make it freeze (that's just 1 °C above absolute zero).

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hope it helps

edit: neutron star

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