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
Damm [24]
3 years ago
14

The number of oxygen atoms (O) in 0.24g of calcium carbonate CaCO3

Chemistry
1 answer:
Sveta_85 [38]3 years ago
8 0

Answer:

0.036  × 10²³ oxygen atoms

Explanation:

Given data:

Mass of compound = 0.24 g

Number of oxygen atoms = ?

Solution:

First of all we will calculate the number of moles of compound.

number of moles = mass/ molar mass

Number of moles = 0.24 g/ 100.1 g/mol

Number of moles = 0.002 mol

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole of CaCO₃ contain 3 moles of oxygen atom.

0.002 mol × 3 = 0.006 moles of oxygen atoms.

Number of oxygen atoms:

1 mole = 6.022 × 10²³ number of oxygen atoms

0.006 mol ×  6.022 × 10²³ f oxygen atoms / 1 mol

0.036  × 10²³ oxygen atoms

You might be interested in
A student needed to make a 3 g/L NaCl solution. The student weighed 3 g of NaCl in a beaker and measured 1 L of water in a 1L vo
hoa [83]

Answer:

The answer is in the explanation.

Explanation:

A solution is defined as the <em>homogeneous mixture </em>of a solute (In this case, NaCl) and the solvent (water).

To prepare 1L of the solution, the student can weigh the 3g of NaCl in the volumetric flask but need to add slowly water to dissolve the NaCl (That is very soluble in water). When all NaCl is dissolved the student must transfer the solution to the 1L volumetric flask. Then, you must add more water to the beaker until "Clean" all the solute of the beaker to transfer it completely to the volumetric flask.

8 0
2 years ago
Approximately 2.5 kg of carbon dioxide gas are produced for every liter of gasoline burned in an automobile gasoline engine. Cal
uranmaximum [27]
125 mile *1gallon/35 mi = 135/35 = (27/7) gallon gasoline 

27/7 gallon * 1 L/0.264 gallon = 14.6 L  gasoline

14.6 L gasoline * 2.5kg CO2/1L gasoline= 36.5 kg CO2

36.5 kg CO2 * 1lb/0.454 kg = 80.4 lb

Answer: 80.4 lb CO2

6 0
3 years ago
Explain why the nucleus of an atom is positively charged but the overall charge of an atom is neutral
luda_lava [24]

Answer:

sorry

Explanation:

i'm not a chemistry student

but let me try

it is because the neutron of an atom is -

why the proton and electron is +and- (positive and negative)

so + and - = 0

4 0
2 years ago
A block is found to have volume of 35.3 cm3. It’s mass is 31.7g. Calculate the density of the block
11111nata11111 [884]

Answer:

<h2>1.11 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{35.3}{31.7}  \\  = 1.113564

We have the final answer as

<h3>1.11 g/mL</h3>

Hope this helps you

6 0
2 years ago
समश्याजिक क्या है हाइड्रोजन का समस्थानिय<br>को समपस्य?​
LUCKY_DIMON [66]

Answer:

GO

Explanation:

8 0
2 years ago
Other questions:
  • Consider the word equation. calcium hydroxide + hydrochloric acid mc012-1.jpg calcium chloride + water Which is the correspondin
    5·2 answers
  • Josh wants to sell a type of drink that has many layers to attract customers.Create a drink and explain the methods to produce t
    10·1 answer
  • Is electrons gained or lost when a rod becomes positively charged after it is rubbed with a dry silk cloth?
    13·1 answer
  • Combustion analysis of toluene, a common organic solvent, gives 8.20 mg of co2 and 1.92 mg of h2o. if the compound contains only
    11·1 answer
  • Sulfuric acid (H2SO4) reacts with potassium hydroxide (KOH) as follows. H2SO4(aq) + 2 KOH(aq) K2SO4(aq) + 2 H2O(l) Calculate the
    6·1 answer
  • You are given 48g of water how many moles do you have?​
    8·1 answer
  • What is the product of the chemical reaction...Au+O2
    9·1 answer
  • Be sure to answer all parts. Acetone is one of the most important solvents in organic chemistry. It is used to dissolve everythi
    7·1 answer
  • PLEASE HELP!!!
    13·1 answer
  • Wavelength, frequency, &amp; energy of electromagnetic waves
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!