1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erastovalidia [21]
4 years ago
10

A 6.53 g sample of a mixture of magnesium carbonate and calcium carbonate is treated with excess hydrochloric acid. The resultin

g reaction produces 1.73 L of carbon dioxide gas at 26 ∘C and 745 torr pressure.
a)Calculate the total number of moles of carbon dioxide that forms from these reactions.
Express your answer using three significant figures.
b) Assuming that the reactions are complete, calculate the percentage by mass of magnesium carbonate in the mixture.
Chemistry
1 answer:
Advocard [28]4 years ago
6 0

Answer:

0.069moles

45.65%

Explanation:

Firstly, we need to calculate the number of moles of CO2 produced. We can use the ideal gas equation for this.

PV = nRT

n = PV/RT

according to the question,

P = 746torr

V = 1.73L

T = 26 = 26 + 273.15 = 299.15K

n = ?

R = 62.364 L. Torr/k.mol

n = (746 * 1.73)/(62.364 * 299.15) = 0.069moles

B. To get this, we can use their molar masses. The molar mass of calcium carbonate is 100g/mol while for magnesium carbonate, molar mass is 84g/mol

The percentage by mass is (84)/(84 + 100) * 6.53g = 2.98g

= 2.98/6.53 * 100 = 45.65%

You might be interested in
Ozone is dangerous to human health only when it is found in the what?
Irina18 [472]
Only when it is found in the atmosphere, because it will create a hole, letting strong UV rays shine down on earth, heating it up, and causing skin cancer in humans and other animals.
4 0
3 years ago
Read 2 more answers
What are the chemical elements in iced tea?
Natali5045456 [20]

Explanation:

I hope you interested about the chemical what they add in tea

6 0
3 years ago
What mass of ni2 is produced in solution by passing a current of 67.0 a for a period of 12.0 h , assuming the cell is 85.0 % eff
Crank
<span>The mass of ni2 that is produced in solution by passing a current of 67.0 A for a period of 12.0 h and the cell is assumed as 85.0 % efficient is 766 Grams Ni. The answer to the question that was given above is 766 Grams Ni.</span>
7 0
4 years ago
What is the mole fraction of NaOH in an aqueous solution that contains 15% NaOH by mass?
zhenek [66]

Answer:

0.074

Explanation:

15% means that in 100 g of solution 15 g sodium hydroxide is present.

Mass of water = 100 - 15 = 85 g

Number of moles of sodium hydroxide:

Number of moles = 15 g/40 g/mol

Number of moles = 0.375 mol

Number of moles of water:

Number of moles = 85 g/18 g/mol

Number of moles = 4.7 mol

Moles fraction of NaOH:

moles of NaOH/ moles of solvent + moles of solute

0.375 mol/ 0.375 mol+4.7mol

0.375 mol / 5.075 mol

0.074

6 0
4 years ago
Which of the following elements are in this chemical reaction Na (s) + MgF2. (s). - NaF (s) +. Mg?
yarga [219]

Answer:

The chemical compounds found in this reaction are: sodium, magnesium and fluorine.

Explanation:

The chemical compounds of the reaction are expressed in the periodic table as follows:

In the case of sodium, the symbol is "Na"

In the case of fluorine, the symbol is "F"

In the case of Magnesium, the symbol is "Mg"

6 0
3 years ago
Other questions:
  • Write the formulas of the compounds formed by Al3+ with the following anions: NO3−, HCO3−, SO32−, PO43−. Use the given order of
    15·2 answers
  • Hello nice ppl(ɔ◔‿◔)ɔ ♥
    7·1 answer
  • Coke is an impure form of carbon that is often used in the in- dustrial production of metals from their oxides. If a sample of c
    7·1 answer
  • When matter is transformed from the liquid state to the gas state, the distance between the particles _______ and the attractive
    7·1 answer
  • Solve each of the following problems using one or more conver-sion factors:a. A container holds 0.500 qt of liquid. How many mil
    6·1 answer
  • What kind of elements generally form ionic compounds?
    5·1 answer
  • Christine sets up an experiment to find out if the amount of fertilizer added to soil affect how many strawberries grow on a str
    11·1 answer
  • The use of genetics by farmers to produce more abundant and healthier crops is an application of the science of _____.
    10·2 answers
  • C. The element in group 2 and period 3 is -
    5·1 answer
  • Which characteristics is ALWAYS true for all members of the plant kingdom
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!