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Fofino [41]
3 years ago
9

Which element is likely more reactive, and why

Chemistry
1 answer:
Mila [183]3 years ago
5 0
The answer is c I believe
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the student records the concentration of the stock solution of H2O2 to be 0.950 M. The student proceeds to prepare the reaction
lana [24]

Answer:

0.0400M of KI

Explanation:

Molarity is an unit of concentration defined as the ratio between moles of solute and liters of solution.

When you add 10.0 mL of 0.10M KI and 15.0mL, total volume is:

25.0mL = <em>0.025L of solution</em>

<em />

And moles of KI are:

0.0100L × 0.10M = <em>0.00100 moles of KI</em>

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Thus, molarity is:

0.00100 moles / 0.025L = <em>0.0400M of KI</em>

6 0
3 years ago
10.0 g of calcium carbonate was heated. The mass of calcium oxide left was 5.6 g. Calculate the mass of
Kipish [7]

Answer:

4.4g

Explanation:

Mass of CaCO3 = 10g

Mass of CaO = 5.6g

Mass of CO2 =?

Mass of CaCO3 = Mass of CaO + Mass of CO2

Mass of CO2 = Mass of CaCO3 — Mass of CaO

Mass of CO2 = 10 — 5.6

Mass of CO2 = 4.4g

4 0
3 years ago
Read 2 more answers
A gas mixture with a total pressure of 765 mmHg contains each of the following gases at the indicated partial pressures: 134 mmH
ladessa [460]

Answer: c

Explanation:

4 0
3 years ago
If 224 g of iron reacts with oxygen, forming
Likurg_2 [28]

Answer: 208g

Explanation: Since 224 grams produces 96 grams more, then 112 grams will produce 208 grams.

8 0
3 years ago
Choose all the answers that apply. Which of the following are essential elements are the most abundant on earth and are essentia
Lynna [10]

Answer:

you answers are sodium and chloride oxygen

Explanation:

sodium

chloride oxygen

8 0
3 years ago
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