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
sergij07 [2.7K]
3 years ago
9

The molecular weight of Calcium Carbonate, CaCO3, is 100.09g/mol

Chemistry
1 answer:
laila [671]3 years ago
3 0

Answer:

True

Explanation:

Molecular mass of CaCo_3:

Molecular mass of Ca + molevular mass of C + molecular mass of O × 3

40g + 12g + 16 × 3g

= 40g + 60 = 100g

Thus its true

You might be interested in
HELPPPPPPPPPP MEEEEEEE
Monica [59]
50% - you have two bb pairs
5 0
2 years ago
Read 2 more answers
Unit: Stoichiometry
Reika [66]

Answer:

1. 2.41 × 1023 formula units

2. 122 L

3. 7.81 L

Explanation:

1. Equation of the reaction: 2 Na(NO3) + Ca(CO3) ---> Na2(CO3) + Ca(NO3)2

Mole ratio of NaNO3 to CaCO3 = 2 : 1

Moles of CaCO3 = mass/molar mass

Mass of CaCO3 = 20 g; molar mass of CaCO3 = 100 g

Moles of CaCO3 = 20 g/100 g/mol = 0.2 moles

Moles of NaNO3 = 2 × 0.2 moles = 0.4 moles

1 Mole of NaNO3 = 6.02 × 10²³ formula units

0.4 moles of NaNO3 = 0.4 × 6.02 × 10²³ = 2.41 × 1023 formula units

2. Equation of reaction : 2 H2O ----> 2 H2 + O2

Mole ratio of oxygen to water = 1 : 2

At STP contains 6.02 × 10²³ molecules = 1 mole of water

6.58 × 10²⁴ molecules = 6.58 × 10²⁴ molecules × 1 mole of water/ 6.02 × 10²³ molecules = 10.93 moles of water

Moles of oxygen gas produced = 10.93÷2 = 5.465 moles of oxygen gas

At STP, 1 mole of oxygen gas = 22.4 L

5.465 moles of oxygen gas = 5.465 moles × 22.4 L/1 mole = 122 L

3.Equation of reaction: 6 K + N2 ----> 2 K3N

Mole ratio of Nitrogen gas and potassium = 6 : 1

Moles potassium = mass/ molar mass

Mass of potassium = 90.0 g, molar mass of potassium = 39.0 g/mol

Moles of potassium = 90.0 g / 39.0 g/mol = 2.3077moles

Moles of Nitrogen gas = 2.3077 moles / 6 = 0.3846 moles

At STP, 1 mole of nitrogen gas = 22.4 L

0.3486 moles of oxygen gas = 0.3486 moles × 22.4 L/1 mole = 7.81 L

7 0
3 years ago
Connects the arteries to the veins.
Nitella [24]

Answer:

D, capillaries

Explanation:

Capillaries connect the two.

7 0
3 years ago
Differentiate between compounds and mixtures using the particle model of<br> matter.
trasher [3.6K]

Answer:

compounds are substance which can be formed by chemically combining two or more elements.

mixtures are substance that are formed by physically mixing two or more substances

8 0
2 years ago
How many Grams would he present if 1 mole sample of sodium were collected?
Zigmanuir [339]
Mass = moles x Mr
So in this case the moles =1
And the Mr equals =11
So you would do - 11x1= 11grams
8 0
3 years ago
Other questions:
  • An alkaline battery produces electrical energy according to the following equation.
    6·1 answer
  • What is the answer to number one
    9·1 answer
  • What is the name for the point at which the indicator changes color in a titration?
    11·1 answer
  • In a given substance, as the temperature of a substance increases, the volume of that substance
    8·1 answer
  • Which of the following best describes the relationship of solar UV radiation to the environment?
    5·1 answer
  • ATP is a molecule used for energy transport inside the cell. The components of ATP are a nitrogen-containing base, a pentose sug
    11·1 answer
  • If you help me, you are the best​
    15·1 answer
  • What two factors most affect the pitch of the sounds made by a person's vocal cords? A. the volume and health of the person's lu
    11·1 answer
  • What’s the difference between internal stimuli and external stimuli
    7·1 answer
  • Elementary grade science class topic showing the three stages of the discovery approach​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!