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vlada-n [284]
3 years ago
15

Hey plz don't report but what if someone lked my girlhood did I lose my vrginty . I really want someone to eat me. A really good

first. Want to see me? Just ask I will give u more info.
Chemistry
1 answer:
BARSIC [14]3 years ago
8 0
U got kik?
 lets talk first before we go any further


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Which of the following represents a decomposition reaction? A. AC + B → AB + C B. A + B + C → ABC C. ABC → A + B + C D. AB + CD
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Answer:

C

Explanation:ABC is being broken down into A, B, C

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What is the composition of an isotope of calcium (atomic number 20)?
beks73 [17]

Answer:

i think c

Explanation:

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True or false? To prepare 20.0 mL of 2.00 M solution of hydrochloric acid from a 10.0 M stock solution, you should take 4.00 mL
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Exactly 16 mL of a solution A is diluted to 300 mL, resulting in a new solution B that has 0.50 M concentration. If the solution
nordsb [41]

Answer:

8.77g

Explanation:

Step 1:

Data obtained from the question.

This includes the following:

Concentration of A (C1) =.?

Volume of A (V1) = 16 mL

Volume of B (V2) = 300 mL

Concentration of B (C2) = 0.50 M

Molar Mass of NaCl = 58.443 g/mol

Mass of NaCl =.?

Step 2:

Determination of the concentration of A.

Applying the dilution formula:

C1V1 = C2V2

The concentration of A i.e C1 can be obtained as follow:

C1V1 = C2V2

C1 x 16 = 0.5 x 300

Divide both side by 16

C1 = (0.5 x 300) / 16

C1 = 9.375 M

Therefore, the concentration of A is 9.375 M

Step 3:

Determination of the number of mole of NaCl in 9.375 M NaCl solution. This is illustrated below:

Molarity = 9.375 M

Volume = 16 mL = 16/1000 = 0.016 L

Mole of NaCl =?

Molarity = mole /Volume

Mole =Molarity x Volume

Mole of NaCl = 9.375 x 0.016

Mole of NaCl = 0.15 mole

Step 4:

Determination of the mass of NaCl. This is illustrated below:

Mole of NaCl = 0.15 mole

Molar Mass of NaCl = 58.443 g/mol

Mass of NaCl =?

Mass = number of mole x molar Mass

Mass of NaCl = 0.15 x 58.443

Mass of NaCl = 8.77g

Therefore, 8.77g of NaCl is needed to make 1 L of the original solution A.

7 0
3 years ago
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Choose the items that describe a mixture.
Brilliant_brown [7]

Answer:Wrong

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I took the test I didn't get it right.

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