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Katena32 [7]
3 years ago
8

Which of the following elements has chemical properties similar to selenium? Which of the following elements has chemical proper

ties similar to selenium? sulfur fluorine nitrogen hydrogen
Chemistry
1 answer:
pashok25 [27]3 years ago
5 0

Answer:

Other chalcogens are oxygen, sulfur, tellurium, and polonium.

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What has to be true of a substance for it to dissolve in water?
lord [1]

The polarity of a water molecule comes from the uneven distribution of electron density of hydrogen and oxygen atom. The oxygen in the water molecule is more electronegative than the hydrogen. Water has a partial positive charge near the hydrogen atom and a partial negative charge near the oxygen atom. The result of this electrostatic attraction results in the bond called hydrogen bond. Also, because of this bond, it has the ability to dissolve most of the solutes due to its polarity and bonding.

7 0
3 years ago
Which has more atoms, 12.0 mol of C or 12.0 mol of Ca?​
mr_godi [17]

Answer:

they are equal.

Explanation:

1 mol = 6.022 × 10^23 (Avogadro's constant), which is the number of atoms in 1 mol of any element. Doesn't matter what their atomic mass is, although, of course, 1 mol of carbon weighs less than 1 mol of calcium, but its because their mass is different, but the point is, in 1 mol of any element there is 6.03*10^23 atoms

This is like saying, what weighs more, 10 kg of feathers or 10 kg of metal

6 0
2 years ago
Which of the following are saturated hydrocarbons?
Digiron [165]

Answer:

a. Alkynes (CnH2n+2) are saturated hydrocarbons.

6 0
3 years ago
The question below ......... in picture
Ivanshal [37]

Answer:

10.49

Explanation:

3MgO + 2Fe — Fe2O3 + 3Mg

n(Fe2O3) = m/M

=15/159.69

=0.9393199324mol

1 Mol of Fe2O3 = 2 moles of Fe

Therefore n(Fe) =2 * 0.9393199324

=0.1878639865mol

m(Fe) = n*m.m

= 0.1878639865 * 55.8

=10.4828g

6 0
3 years ago
Calculation of half-life​
OlgaM077 [116]

Answer:

No limited

Explanation:

because life is not limited any person doesn't have same life years it can die any time

3 0
3 years ago
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