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Bezzdna [24]
3 years ago
13

Calculate the mass of 2.5 mol of Iron (111) oxide Fe2O3

Chemistry
1 answer:
lana [24]3 years ago
8 0

Answer: m= n·M = 2.5 mol· 159.7 g/mol

Explanation: molar mass Fe2O3 = 2·55.85+ 3·16 = 159,7 g/mol

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You carefully weigh out 16.00 g of CaCO3 powder and add it to 64.80 g of HCl solution. You notice bubbles as a reaction takes pl
bulgar [2K]

Answer: Mass of CO_2  produced in this reaction was 6.56 grams

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

CaCO_3(s)+2HCl(aq)\rightarrow H_2O(l)+CO_2(g)+CaCl_2(aq)

Mass or reactants =  Mass of CaCO_3+ mass of HCl = 16.00 + 64.80 = 80.80 g

Mass of products  = mass of aqueous solution + mass of CO_2 + = 74.24 + x g

Mass or reactants = Mass of products

80.80 g = 74.24 + x g

x = 6.56 g

Thus mass of CO_2  produced in this reaction was 6.56 grams

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4 years ago
Which is true about the dissolving process in water?
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Water molecules move througout the solute
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A student drops some metal paper clips in a box of sand. The student uses a magnet to separate the metal paper clips from the sa
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Answer:

compound

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because now there are one together

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3 years ago
Which of the following factors drives all the weather on Earth, including large-scale storms and local weather systems? The ocea
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A sky rocket is launched with a force of 10 N and accelerates at 20 m/s squared what is the mass of this skyrocket
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Answer: 0.5 kg

Explanation:

Force of launched skyrocket = 10 N

Acceleration of skyrocket = 20 m/s squared (i.e 20m/s^2)

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Mass = 0.5 kg

Thus, the mass of this skyrocket is 0.5 kilograms

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4 years ago
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