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Keith_Richards [23]
3 years ago
11

How does the concentration of reactants affect the rate of a reaction

Chemistry
1 answer:
Naddika [18.5K]3 years ago
5 0

Answer:

B

Explanation:

If the concentration is increased, there are more particles to collide with each other, increasing the rate of the reaction.

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40 g of CaCO3 is how many moles of CaCO3?<br> 10 moles<br> 0.4 moles<br> 40 moles<br> 100 moles
AleksandrR [38]

Answer:

0.4 moles

Explanation:

To convert between moles and grams you need the molar mass of the compound. The molar mass of of CaCO3 is 100.09g/mol. You use that as the unit converter.

40gCaCO3* 1mol CaCO3/100.09gCaCO3 = 0.399640 mol CaCO3

This rounds to 0.4 moles CaCO3

8 0
3 years ago
Lead(II) nitrate and ammonium iodide react to form lead(II) iodide and ammonium nitrate according to the reaction Pb(NO3)2(aq)+2
Setler79 [48]

Answer:

a) volume of ammonium iodide required =349 mL

b) the moles of lead iodide formed = 0.0436 mol

Explanation:

The reaction is:

Pb(NO_{3})_{2}+2NH_{4}I -->PbI_{2}+2NH_{4}NO_{3}

It shows that one mole of lead nitrate will react with two moles of ammonium iodide to give one mole of lead iodide.

Let us calculate the moles of lead nitrate taken in the solution.

Moles=molarityX volume (L)

Moles of lead nitrate = 0.360 X 0.121 =0.0436 mol

the moles of ammonium iodide required = 2 X0.0436 = 0.0872 mol

The volume of ammonium iodide required will be:

volume=\frac{moles}{molarity}=\frac{0.0872}{0.250}=0.349L=349mL

the moles of lead iodide formed = moles of lead nitrate taken = 0.0436 mol

7 0
3 years ago
How does adding salt to water affect the freezing point
melamori03 [73]
Salt makes the freezing point of water decrease, so it would freeze at a warmer temperature than regular water
4 0
3 years ago
The path around Lake Michigan downtown is approximately 18 miles. How many inches is it? ​
Scilla [17]
1,140,480 inches
Explanation:
Multiply 63,360 inches by the amount of miles you want.

This case:
63,360 inches x 18 miles = 1,140,480 inches
8 0
3 years ago
How many atoms are in 169g of calcium?
uysha [10]
The answer is 6.022• 10^23 atoms

5 0
3 years ago
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