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Stella [2.4K]
3 years ago
14

What is 4.50+3.4+12.09 ?​

Chemistry
2 answers:
klasskru [66]3 years ago
8 0

Answer:

19.99

Explanation:

The steps are what I did, so no need to do it the exact same!

1. Add 4.50 and 3.4

4.50 + 3.4 = 7.9

2. Add 7.9 and 12.09

7.9 + 12.09 = 19.99

Hope this helps!

katen-ka-za [31]3 years ago
8 0

Answer:

The answer to this equation is 19.99. If you round the number, it is 20.

Explanation:

     4.50

     3.40 (0 as a place holder)

+   12.09

-------------------

     19.99 because . . .

4.5 + 3.4 = 7.9

7.9 + 12.09 = 19.99.

19.99 ≅ 20.00 or 20<em> (IF YOU NEED TO ROUND IT, IF NOT,</em><em> IT IS JUST 19.99!!!</em><em>)</em>

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Chemistry is the definition​
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Explanation:

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3 years ago
Why can the geologic record be analyzed by looking at different rock layers?
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2 years ago
ASAP
Oksanka [162]

Answer:

Answer B

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6 0
3 years ago
A 34.57 mL sample of an unknown phosphoric acid solution is titrated with a 0.127 M sodium hydroxide solution. The equivalence p
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<u>Answer:</u> The concentration of unknown phosphoric acid solution is 0.034 M

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is H_3PO_4

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=3\\M_1=?M\\V_1=34.57mL\\n_2=1\\M_2=0.127M\\V_2=28.2mL

Putting values in above equation, we get:

3\times M_1\times 34.57=1\times 0.127\times 28.2\\\\M_1=\frac{1\times 0.127\times 28.2}{3\times 34.57}=0.034M

Hence, the concentration of unknown phosphoric acid solution is 0.034 M

7 0
3 years ago
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