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Natasha2012 [34]
3 years ago
8

How do you determine the percent yield of a chemical reaction?

Chemistry
1 answer:
valentinak56 [21]3 years ago
7 0

Answer:

percentage yield =[ experimental yield / theoretical yield] x 100

Explanation:

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Choose all the answers that apply. What do all cells do? reproduce contain hereditary information have a nucleus break down food
Travka [436]

Answer:

contain hereditary information

break down food into energy

Explanation:

Hereditary information is contained in genes and genes are found inside the cell. This implies that the cell contains hereditary information of organisms. This hereditary information is passed on during cell division from parent to daughter cells.

Metabolism occurs in the cells. The cells use oxygen to break down food materials to produce energy.

5 0
3 years ago
Which statement is true concerning energy
slava [35]
What are the statements ?
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Calcium bicarbonate (Ca(HCO3)2) Ca:H:C:O = 1:2:2 ___ Lithium sulfide (Li:2s) Li:S = 2:__
Anastaziya [24]

Answer: The ratio of atoms in calcium bicarbonate ; Ca : H : C : O = 1:2:2:6.

The ratio of atoms in lithium sulfide; Li : S = 2 : 1

Explanation:

In calcium bicarbonate:Ca(HCO_3)_2

In a molecular formula of calcium carbonate there are:

Number of Calcium atoms = 1

Number of Hydrogen atom = 1 × 2 = 2

Number of Carbon atoms = 1 × 2 = 2

Number of Oxygen atoms = 3 × 2 = 6

So, Ca : H : C : O = 1 : 2 : 2 : 6

In lithium sulfide :Li_2S

In a molecular formula of lithium sulfide there are:

Number of Lithium atoms =  1 × 2 = 2

Number of Sulfur atoms = 1

So, the Li : S = 2 : 1

8 0
3 years ago
3<br>Nitrogen obtained in the laboratory is collected over water.why?​
Cloud [144]
Because displacement of water is the convenient way to obtain gas.
8 0
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Which of these common substances is a mixture?
ivolga24 [154]
B .pure water it’s made up of oxygen and hydrogen “H2O”
5 0
3 years ago
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