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SVEN [57.7K]
3 years ago
6

The most well-known biogenic d-elements

Chemistry
1 answer:
erma4kov [3.2K]3 years ago
4 0

Answer:

i think interstellar dust......

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3 x 1023 molecules of element Z have a mass of 38 g. What is the mass of 1 mole?
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38 g / (3 x 10^23 molecules) * 6,02x10^23 molecules/mol = 76,25 g/mol.
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While researching interstellar matter, scientists discovered that 60 carbons could be bonded together in a structure they named
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So, based on the given information, scientists were capable of using models to represent the shape of the structure. The shape resembled a soccer ball.
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Based on the above, the function this model served in science is:
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4 years ago
Acetylenic fatty acids are found in many tropical plants. Compound B, C18H32O2, is one such compound; it absorbs 2 equivalents o
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3 years ago
Do the elements in group 7 of the periodic table react with metals to form covalent compounds, ionic compounds, neither, or both
Vladimir [108]

Answer:Group 1 elements have 1 valence electron, meaning they have 1 extra electron that can easily be donated to an atom in search of 1 more electron. When they give away that extra electron to form an ionic compound, they become more stable.

For example, Group 7A (Group 17) elements have 7 valence electrons, meaning they need 1 extra electron to be stable. Group 1 and 7A elements make splendid ionic compounds.

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7 0
2 years ago
Assume that 50.0mL 50.0mL of 1.0MNaCl(aq) 1.0MNaCl(aq) and 50.0mL 50.0mL of 1.0M AgNO 3 (aq) 1.0MAgNO3(aq) were combined. Accord
S_A_V [24]

Answer:

The amount of precipitate formed would 7.175 grams of silver chloride.

Explanation:

Moles (n)=Molarity(M)\times Volume (L)

Moles of NaCl = n

Volume of NaCl solution = 50.0 mL = 0.050 L

Molarity of the hydrogen peroxide = 2.0 M

n=2.0 M\times 0.050 L=0.100 mol

Moles of silver nitarte = n'

Volume of silver  nitrate solution = 50.0 mL = 0.050 L

Molarity of the silver nitrate = 1.0 M

n'=1.0 M\times 0.050 L=0.050 mol

NaCl(aq)+AgNO_3(aq)\rightarrow AgCl(s)+NaNO_3(aq)

According to reaction, 1 mole of of silver nitrate reacts with 1 mole of NaCl. Then 0.050 mole of silve nitrate will :

\frac{1}{1}\times 0.050 mol=0.050 mol of NaCl

This means that silver nitrate is in limiting amount and NaCl is in excessive amount.

So, the amount of AgCl depends upon amount of silver nitrate.

According to reaction, 1 mole of silver nitrate gives 1 mole of AgCl.

Then 0.050 moles of silver nitrate will give;

\frac{1}{1}\times 0.050 mol=0.050 mol of AgCl

Mass of 0.050 moles of AgCl ;

0.050 mol\times 143.5 g/mol=7.175 g

The amount of precipitate formed would 7.175 grams of silver chloride.

8 0
3 years ago
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