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andreyandreev [35.5K]
2 years ago
5

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

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

Answer:

Its C pn ed

Explanation:

Karolina [17]2 years ago
3 0
To compare the results when the independent variable is not involved
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What is the neutral subatomic particle that is a part of the nucleus?
lisabon 2012 [21]

Answer

A neutron

Explanation:

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2 years ago
How many moles of magnesium ions are present in 283.8 mL of<br> 6.74 M Mg3(PO4)2?
Dmitriy789 [7]

Answer:1 mole of Mg3(PO4)2 (molecule) contains 3 moles of Mg atoms, 2 moles of P atoms and 2X4 moles of O atoms. = 0.03125 moles.

Explanation:

6 0
3 years ago
4. Does an atom of an element always have the same number of neutrons as other atoms of the same
Sergeeva-Olga [200]

Explanation:

No. Isotopes are atoms of the same element with different atomic masses (due to the different number of neutrons)

For example, carbon exists as carbon-12 and carbon-14, which both have 6 protons but have 6 and 8 neutrons respectively.

6 0
2 years ago
If 0.0262 mol of cacl2 is dissolved in water to make a 0.520 m solution, what is the volume of the solution?
Oduvanchick [21]
Cacl2  dissolve   in  water   according  to the  following  equation

Cacl2 + H2O  =  Ca(OH) + Hcl
Volume=  moles/molarity
  The  reacting  ratio    between CaCl2  to  Ca(OH)  is   1:1
therefore  moles  of  solution   is  also  0.0262  moles hence  volume   is  =
0.0262mol/  0.52mol/l =  0.0504L  or50.4ml
5 0
2 years ago
What is the total anion concentration (in mEq/L ) of a solution that contains 6.0 mEq/L Na + , 11.0 mEq/L Ca 2+ , and 1.0 mEq/L
lubasha [3.4K]

24



Ddddd

Hope I helped

5 0
2 years ago
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