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muminat
3 years ago
12

I’m so lost please help

Chemistry
1 answer:
ExtremeBDS [4]3 years ago
7 0

C=4

D=-19

Explanation:

2exp-25/5exp-7= 4exp-19

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A block of aluminum occupies a volume of 0.015 L and has a mass of 40.5 g. What is its density
yan [13]

Answer:

<h2>Density = 2700 g/L</h2>

Explanation:

Density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

volume = 0.015 L

mass = 40.5 g

Substitute the values into the above formula and solve for the Density

That's

Density =  \frac{40.5}{0.015}

We have the final answer as

Density = 2700 g/L

Hope this helps you

7 0
3 years ago
Which of these functional groups is found in all amino acids? -NH2 -OH =O -PO42-
melisa1 [442]

Answer : The correct option is, -NH_2

Explanation :

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The bond present between the two amino acid is called a peptide bond.

The peptide bond is a chemical bond that is formed between the two molecules when the nitrogen of one amino acid react with the carbon of another amino acid by releasing a water molecule. This is a dehydration synthesis or condensation reaction.

From this we conclude that, only two functional groups carboxylic group, -COOH and ammine group, -NH_2 are present in all amino acids.

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7 0
3 years ago
Consider this equation: 2.524 g (5.1 × 106 g) ÷ (6.85 × 103 g) = ? How many significant figures should the result have?
weqwewe [10]

Answer:

7

Explanation:

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(6.85)(103)g

=

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705.55g

=

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705.55

=

1364.4744g

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6 0
3 years ago
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Ainat [17]
Decomposition is the  example  of a  reaction  in  which  hydrogen and oxygen  are  produced  by  running   an  electric current  through  water.

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4 0
3 years ago
Read 2 more answers
What would happen if a neutron was added to Lithium (7)
Ainat [17]

Answer:

if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8

8 0
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