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andreyandreev [35.5K]
3 years ago
5

Why is it important to have a control group in an experimental investigation?

Chemistry
2 answers:
Alika [10]3 years ago
8 0

Answer:

Its C pn ed

Explanation:

Karolina [17]3 years ago
3 0
To compare the results when the independent variable is not involved
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A sample of an ionic compound that is often used as a dough conditioner is analyzed and found to contain 4.628 g of potassium, 9
Roman55 [17]

Answer:

The empirical formula of the compound is = KBrO_3

The name of the compound is potassium bromate.

Explanation:

Mass of potassium = 4.628 g

Moles of potassium = \frac{4.628 g}{39 g/mol}=0.1187 mol

Mass of bromine = 9.457 g

Moles of bromine = \frac{9.457 g}{80 g/mol}=0.1182 mol

Mass of oxygen = 5.681 g

Moles of oxygen = \frac{5.681 g}{16 g/mol}0.3551

For empirical formula of the compound, divide the least number of moles from all the moles of elements present in the compound:

Potassium :

\frac{0.1187 mol}{0.1182 mol}=1.0

Bromine;

\frac{0.1182 mol}{0.1182 mol}=1.0

Oxygen ;

\frac{0.3551 mol}{0.1182 mol}=3.0

The empirical formula of the compound is = KBrO_3

The name of the compound is potassium bromate.

5 0
3 years ago
Palmitic acid, derived from palm oil, is one of the most common fatty acids found in butter, cheese, milk, and meat.
Pie

Answer:

a. True

Explanation:

Palmitic acid is the acid found in animals and plants. It is the saturated acid that contains fats. It is extracted from palm oil and from fat sources like butter, cheese, milk and meat. It is added in milk with low fat content to add Vitamin A in it. The fat content of palmitic acid is very high. excessive consumption of palmitic acid leads to heart diseases and life risks.

5 0
3 years ago
How many moles are present in 418.9 grams of mohr salt
aniked [119]

Answer: Incomplete/half answer

Explanation:

  grams of              molar mass of the

     substance                     substance in grams

–––––––––––  =  –––––––––––––––

moles of the

substance                      one mol

use this formula to asnwer the question

4 0
3 years ago
Convert 15.78 g of H2O2 to mols. <br> Convert 15.3 mols Au to g
iren2701 [21]

Answer:

.46 moles H2O2

3,014 grams Au

Explanation:

H2O2:

15.78g (1 mol/34g) = .46 moles H2O2

Au:

15.3mol (197g/mol) = 3,014 grams Au

8 0
3 years ago
What is a dependent variable
Juliette [100K]
The dependent variable is the variable that changes based on the independent variable (the manipulated variable).
7 0
3 years ago
Read 2 more answers
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