Answer:
CO2
Explanation:
Carbon dioxide is a chemical compound that consists of two oxygen atoms and one carbon atom
Answer:
The kinetic energy of particles in a system.
Explanation:
Thermal energy in heat and have kinetic energy!
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Answer:
2 HCl + CaCO3 = CaCl2 + H2O + CO2
Explanation:
On the right side we have 2xCl, to get the same amount we will multiply HCl on the left side by 2.
This will give us 2xH on the left side; we also have 2xH on the right side ( in H2O).
On both sides we have 1x Ca; 1x C.
On the left side we have 3XO (in CaCO3), on the right side we have 1O in H20 and 2xO in CO2, so 3x O on the right side as well.
The reaction is balanced.
The mass percent of oxygen in Nickel(
)sulfate is
percent.
At first, we look up the atomic masses for the element from the periodic table.
The atomic masses are found to be:
Next, we determine how many grams of each element are present in one mole of 
The mass of one mole
is:

So, The mass percent of oxygen 
percent.
To learn more about Mass percent, refer to:
Answer:
C. L mol-1 s-1.
Explanation:
Hello,
In this case, a rate law has the following general form:

Whereas r accounts for the rate measured in M/s units, k is the rate constant whose units depends on the order of the reaction, C the concentration of the species in M units, contributing to the rate and x the order of the reaction.
In such a way, since in this case x equals two (second-order rate), the units of k turns out:

Which matches with C. L mol-1 s-1.
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