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natima [27]
4 years ago
15

Which of these is an indication that a chemical reaction has occurred?

Chemistry
1 answer:
nevsk [136]4 years ago
3 0

Formation Of A Gas.

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C2H4+4O2-->4H2O+2CO2

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Convert 1.7 Kg to cg
Kipish [7]
To answer this lets first see how much 1 kg is equal to in cg.

1 kg = 100000 cg 

Now lets multiply:-

100000 × 1.7 =  <span>170000
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An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?
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If 100 ml of a 0.5 M HCI Solution is diluted with water to 1000ml, what is the new concetration?
Vesna [10]

Answer:

0.05\ \text{M HCl}

Explanation:

V_1 = Initial volume = 100 mL

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M_1 = Initial concentration = 0.5 M

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We have the relation

\dfrac{M_1}{M_2}=\dfrac{V_2}{V_1}\\\Rightarrow M_2=M_1\dfrac{V_1}{V_2}\\\Rightarrow M_2=0.5\times \dfrac{100}{1000}\\\Rightarrow M_2=0.05\ \text{M HCl}

The new concentration is 0.05\ \text{M HCl}.

3 0
3 years ago
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