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yanalaym [24]
3 years ago
15

Fill in the blanks in the following sentences:

Chemistry
1 answer:
Nezavi [6.7K]3 years ago
4 0

Answer:

a. neutral

b. basic /alkaline

c. acidic

4. 13

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Think about chemicals you may have in your home and list as many as you can think of:
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Sucrose; C12H22O11

C9H8O4; acetyl salicylic acid

H2O2; hydrogen peroxide,

NaOH; sodium hydroxideExplanation:

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What is a chemical substance that cannot be broken down into another chemical substance?
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Molecule is a chemical substance that cannot be broken down into another chemical substance.

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Semi-conductors have properties of both metals and non metals.which are two examples of metalloids
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What forms when two atoms combine? PLEASE HELP!!!!!!!
kolbaska11 [484]

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Option A - nucleus

Explanation:

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3 years ago
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For a certain experiment, a student requires 100 milliliters of a solution that is 8% HCl (hydrochloric acid). The storeroom has
exis [7]

Answer:

70 mL of 5% HCl and 30 mL of 15% HCl

Explanation:

We will designate x to be the fraction of the final solution that is composed of 5% HCl, and y to be the fraction of the final solution that is composed of 15% HCl. Since the percentage of the final solution is 8%, we can write the following expression:

5x + 15y = 8

Since x and y are fractions of a total, they must equal one:

x + y = 1

This is a system of two equations with two unknowns. We will proceed to solve for x. First, an expression for y is found:

y = 1 - x

This expression is substituted into the first equation and we solve for x.

5x + 15(1 - x) = 8

5x+ 15 - 15x = 8

-10x = -7

x = 7/10 = 0.7

We then calculate the value of y:

y = 1 - x = 1 - 0.7 = 0.3

Thus 0.7 of the 100 mL will be the 5% HCl solution, so the volume of 5% HCl we need is:

(100 mL)(0.7) = 70 mL

Similarly, the volume of 15% HCl we need is:

(100 mL)(0.3) = 30 mL

3 0
3 years ago
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