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
rodikova [14]
3 years ago
9

How many miles are there in 20g of KClO3 (k=39 Cl=35.5 O=16)​

Chemistry
1 answer:
SashulF [63]3 years ago
4 0
<h3>Answer:</h3>

0.144 moles

<h3>Explanation:</h3>
  • The relationship between mass of a compound, number of moles and molar mass of the compound is given by;
  • Number of moles = Mass ÷ Molar mass
  • Molar mass is equivalent to the relative formula mass of the compound that is calculated the atomic masses of the elements making the compound.

In this case;

Our compound, KClO3 will have a molar mass of;

= 39 + 35.5 + 4(16)

= 138.5 g/mol

Mass of KClO3 is 20 g

Therefore;

Number of moles = 20 g ÷ 138.5 g/mol

                            = 0.144 moles

Thus, the number of moles in 20 g of KClO3 is 0.144 moles

You might be interested in
How many grams of sodium are in .500 of a mole
Step2247 [10]

Convert mole to gram by multiplying the molar mass of sodium

0.500mol Na x 22.990g = 11.495g of Na

4 0
2 years ago
Which of the following statements is subjective? Van Gogh painted beautiful works of art. The planets revolve around the sun. Bl
mezya [45]
The "Van Gogh" one is subjective, because it expresses opinion and is not a true, hard fact. :)
4 0
3 years ago
Read 2 more answers
What is the density of an 84.7 g sample of an unknown substance if the sample occupies 49.6cm cubed
Ahat [919]

Answer:

             1.70 g.cm⁻³

Solution:

Data Given;

                   Mass  =  84.7 g

                   Volume  =  49.6 cm³

                   Density  =  ?

Formula Used;

                   Density  =  Mass ÷ Volume

Putting values,

                   Density  =  84.7 g ÷ 49.6 cm³ 

                   Density  =  1.70 g.cm⁻³

7 0
3 years ago
When 2.5 mol of O2 are consumed in their reaction, ________ mol of CO2 are produced
Vika [28.1K]

The given question is incomplete. The complete question is:

The combustion of propane (C3H8) in the presence of excess oxygen yields CO_2 and H_2O

C_3H_8(g)+5O_2 (g)\rightarrow 3CO_2(g)+4H_2O (g)

When only 2.5 mol of O_2 are consumed in order to complete the reaction, ________ mol of CO_2 are produced.

Answer: Thus when 2.5 mol of O_2 are consumed in their reaction,  1.5 mol of CO_2 are produced

Explanation:

The balanced chemical equation is:

C_3H_8(g)+5O_2 (g)\rightarrow 3CO_2(g)+4H_2O (g)

According to stoichiometry :

5 moles of O_2 produce = 3 moles of  CO_2

Thus 2.5 moles of O_2 will produce = \frac{3}{5}\times 2.5=1.5 moles of  CO_2

Thus when 2.5 mol of O_2 are consumed in their reaction,  1.5 mol of CO_2 are produced

4 0
2 years ago
Where would a primary producer be located in a food chain?
vfiekz [6]

Answer:

The primary producer would be at the bottom of the food chain.

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Select the characteristics of a hydrogen bond:
    11·2 answers
  • Sodium carbonate + hydrochloric acidsodium chloride + carbon dioxide + water
    10·1 answer
  • A piece of silver metal has a mass of 3.687 grams. If the density of silver is 10.5 g/cm, what is the volume of the silver?​
    8·1 answer
  • We inhale oxygen and exhale carbon dioxide as a result of a ______ change in our bodies. a. physical b. chemical
    13·1 answer
  • __________ is the attractive pull between any two objects.
    7·2 answers
  • An example of a double displacement is
    8·1 answer
  • Question 2 (2 points)
    11·1 answer
  • What type of change is this picture showing?
    10·1 answer
  • The diameter of a circle is 12 feet. What is the circle's circumference?<br><br>Use 3.14 for pie
    6·1 answer
  • Of the following metals, the one most likely to occur naturally in its pure ( or “free”) form in earth would be (a) aluminum (b)
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!