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Dmitry [639]
2 years ago
14

PLZZ HELP OTS A TIMED TEST Choose the reaction type for the following. 2Na2O → 4Na + O2

Chemistry
2 answers:
Maru [420]2 years ago
5 0

Answer:

its decomposition

Explanation:

Kisachek [45]2 years ago
4 0

Answer:

Decomposition

Explanation:

single displacement is ab+c=ac+b

synthesis is a+b=ab

decomp is ab=a+b

douple displacement is ab+cd=ac+bd

combustion involves co2.

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Muscles, bones, skin, and
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8 0
3 years ago
43 mg = [?]g <br>A. 0.043 g <br>B. 4.3 g <br>C. 4300 g <br>D. 43,000 g​
Ymorist [56]

Answer:

Option A (0.043 g) is the correct answer.

Explanation:

Given:

= 43 mg

As we know,

1 \ mg = \frac{1}{1000} \ g

then,

⇒ 43 \ mg = \frac{43}{1000}  \ g

              = 0.043 \ g

Thus, the above is the correct alternative.

4 0
3 years ago
2. How many grams of water can be heated from 20.0 oC to 75oC using 12500.0 Joules?
kenny6666 [7]

Answer;

  = 0.054 kg or 54 g

Explanation;

Using the equation; Q = mcΔT where Q is the quantity of heat transferred, m is the mass, c is specific heat of the substance, ΔT is delta T, the change in temperature.  

ΔT = 75 - 20 = 55 C.  

Solve the equation for m  

m = Q/ cΔT

Mass = 12500 / (55 × 4200)

        = 0.054 kg or 54 g


4 0
3 years ago
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