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Goshia [24]
3 years ago
14

Which element family is all 2-

Chemistry
1 answer:
Zielflug [23.3K]3 years ago
4 0

Answer:

Alkaline Earth Metals

Explanation:

:)

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How many grams nano3 add to 500g of h20 prepare solution .5 molal nano3?
Scilla [17]
Answer is: mass of sodium nitrate is 21,25 g.
m(H₂O) = 500 g · 1 kg/1000 g = 0,5 kg.
b(solution) = 0,500 m = 0,500 mol/kg.
m(NaNO₃) = ?
b(solution) = n(NaNO₃) ÷ m(H₂O).
n(NaNO₃) = 0,500 mol/kg · 0,5 kg.
n(NaNO₃) = 0,25 mol.
m(NaNO₃) = n(NaNO₃) · M(NaNO₃).
m(NaNO₃) = 0,25 mol · 85 g/mol.
m(NaNO₃) = 21,25 g.
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3 years ago
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SNC2L Reflection Activities
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The reflection from plane mirror is shown in the diagram.

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The second law states that angle of incidence is equal to angle of reflection. Here we can also see that the i =r. It is applicable here too.

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a photon of light has a frequency of 3.5 x 10 to the 14th Hertz what is the wavelength of this light what color is this late
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D 4 grams
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