3 years ago

Any compound that has at least one element from Group 17 is called a?

Chemistry

1 answer:

Dmitrij [34]3 years ago

8 0

I think it's called a Halide or a halogen

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3 years ago

The half life of radon-222 is 3.8 days. How Much of a 100g sample is left after 15.2 days

professor190 [17]

Answer:

6.2 g

Explanation:

In a first-order decay, the formula for the amount remaining after n half-lives is

$N = \frac{N_{0}}{2^{n}}$

where

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If $t_{\frac{1}{2}} = \text{3.8 da}$

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$\text{N} = \frac{\text{100 g}}{2^{4.0}} = \frac{\text{100 g}}{16} = \text{6.2 g}$

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3 years ago

How many moles of Cl- ions are needed to completely combine with 0.25 moles of Mg+2 ions?

Mnenie [13.5K]

The number of moles of Cl- ions needed to combine completely with 0.25 mole of Mg+2 ions is:
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3 years ago

An object should float in a liquid if it is

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Less dense than the liquid

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2 years ago

The molar mass of sodium of chloride

wariber [46]

Answer:

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Explanation:

pls vote.......

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