CHEMISTRY HIGH SCHOOL

How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate is combined with 12.0 g of hydrochloric acid?

Answers

Answer 1

Answer:

Answer:

The answer to your question is 29.7 g of CaCl₂

Explanation:

data

mass CaCl₂ = ?

mass CaCO₃ = 27 g

mass HCl = 12 g

Balanced Reaction

CaCO₃ + HCl ⇒ CaCl₂ + H₂O + CO₂

Molecular weight

CaCO₃ = 40 + 12 + 48 = 100 g

HCl = 36 + 1 = 37 g

- Calculate proportions

Theoretical proportion CaCO₃ / HCl = 100 / 37 = 2.7

Experimental proportion CaCO₃/ HCl = 27/12 = 2.25

From the proportions we determine that the limiting reactant is CaCO₃, because the proportion diminishes.

Molecular weight CaCl₂ = 40 + 35.5 = 110 g

100 g CaCO₃ -------------------- 110 g of CaCl₂

27 g CaCO₃ ------------------------- x

x = (27 x 110) / 100

x = 29.7 g of CaCl₂

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True or false. Nitrogen is extremely important for good crops?

Answers

Answer:

True

Explanation:

Without enough nitrogen there is not enough nutrients for plants to make both aminoacids and many products of secondary metabolism

How many electrons would be found in an isotope of silicon 29

Answers

14 electrons15 neutrons

Answer: 14

Explanation: Founders Educere answer.

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Which element has the greatest average atomic mass?

Answers

Answer:

Oganesson is the number 118 the largest

Choose the incorrect answer below concerning absolute zero.. . lowest possible temperature. theoretical temperature at which gas molecules have no kinetic energy. is equal to 0°C. is equal to 0 K

Answers

If it is to choose the incorrect answer concerning absolute zero, the lowest possible temperature, it would be the one that is equal to 0 degree centigrade, since that absolute zero in terms of degree Celsius would be -273. And if converted to Kelvin(K) would be 0.

is equal to 0°C is the answer :)

Which of the following is necessary for collisions to be successful?A. enough kinetic energy and favorable geometry
B. enough kinetic energy only
C. sufficient potential energy only
D. favorable geometry only

Answers

Answer: A. enough kinetic energy and favorable geometry

Explanation: According to collision theory, the rate of a reaction depends upon the number of effective collisions which means the collisions which result in the formation of product which in turn depend on following two factors:-

a) Energy factor: In order for a collision to be successful, the colliding molecules must cross a energy barrier which is called as threshold energy. Thus molecules with energy less than threshold energy are not able to result into products.

b) Orientation factor: the colliding molecules must have proper orientations at the time of collision otherwise they do not result in product formation.

It's A Enough kinetic energy and favorable geometry

A substance has a mass of 10 grams and a volume of 5mL. What is its density?