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Vladimir [108]
3 years ago
8

Apt A piece of chalk becomes shorter as it is used. Which of the following is NOT true of the shorter piece of chalk?

Chemistry
1 answer:
Tanzania [10]3 years ago
5 0
A. It’s mass has changed if not that’s then it’s B.
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What volume of 15.6M NH4OH is needed to make 500. mL of 3.00M solution?
Mariana [72]

Answer:

V₁  = 96.2 mL

Explanation:

Given data:

Initial volume of NH₄OH required = ?

Initial molarity = 15.6 M

Final molarity = 3.00 M

Final volume = 500.0 mL

Solution:

Formula:

M₁V₁  =  M₂V₂

M₁ = Initial molarity

V₁  =  Initial volume of NH₄OH

M₂ =Final molarity

V₂ = Final volume

Now we will put the values.

15.6 M ×V₁  =  3.00 M×500.0 mL

15.6  M ×V₁  = 1500 M.mL

V₁  = 1500 M.mL /15.6 M

V₁  = 96.2 mL

6 0
3 years ago
Which is the correct formula for the compound whose percent composition is shown?
miv72 [106K]
File:///Users/user/Downloads/Chemistry%20Exam%20Study%20Guide%20Fall%202012.pdf

Idk if this will help you, cuz it says what question are going to be in ur final 
6 0
3 years ago
Scoring Scheme: 3-3-2-1 Part I. How many mL of 6 M NaOH stock solution should be used to prepare the 500 mL of 0.2 M NaOH? Pleas
Orlov [11]

Answer : The volume of 6M NaOH stock solution is, 16.7 mL

Explanation :

To calculate the volume of NaOH stock solution, we use the equation given by neutralization reaction:

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the molarity and volume of NaOH stock solution.

M_2\text{ and }V_2 are the molarity and volume of NaOH.

We are given:

M_1=6M\\V_1=?\\M_2=0.2M\\V_2=500mL

Putting values in above equation, we get:

6M\times V_1=0.2M\times 500mL\\\\V_1=16.7mL

Thus, the volume of 6M NaOH stock solution is, 16.7 mL

4 0
3 years ago
If 115grams of a substance reacts with 84grams of another substance, what will be the mass of the products after the reaction?
AysviL [449]
Isn’t it 115+84 so 199
4 0
3 years ago
What the answer I’m on a midterm and can’t seem to find it help
Sonja [21]

Answer:

Sorry I’m not rlly sure but maybe the 2nd or the last

Explanation:

8 0
2 years ago
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