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
34kurt
3 years ago
14

How many moles of sodium are present in 17 g of Na?

Chemistry
1 answer:
11Alexandr11 [23.1K]3 years ago
8 0

Answer:

1. 0.74mol

2. 0.42mol

3. 2.125mol

4. 0.301mol

5. 4.52 × 10^23 particles

Explanation:

Number of moles (n) in a substance can be found using the formula:

mole (n) = mass/molar mass

Using this formula, the following moles are calculated:

1. Molar of Na = 23g/mol

mole = 17/23

mole = 0.74mol

2. Molar mass of Na2SO4 = 23(2) + 32 + 16(4)

= 46 + 32 + 64

= 142g/mol

Mole = 60/142

mole = 0.42mol

3. Molar mass of CO2 = 12 + 16(2)

= 12 + 32

= 44g/mol

mole = 93.5/44

mole = 2.125mol

4. Molar mass of sodium nitrate (NaNO3) = 23 + 14 + 16(3)

= 23 + 14 + 48

= 85g/mol

mole = 25.6/85

mole = 0.301mol

5. Number of particles in one mole of a substance is 6.022 × 10^23 particles. Hence, in 0.75mol of calcium hydroxide (Ca(OH)2, there will be;

0.75mol × 6.02 × 10^23

= 4.515 × 10^23

= 4.52 × 10^23 particles

You might be interested in
Actual Value = -273 Experimental Value = -274 calculate the percent error of your value for absolute zero (in Celsius) Percent e
monitta

Answer:

QW2345

Explanation:

123456TY7

4 0
3 years ago
In which of Piaget’s stages would a child be if the child has just developed object permanence?
rodikova [14]

Answer:

preoperational

Explanation:

7 0
3 years ago
Read 2 more answers
Describe several main ideas in chemistry
12345 [234]
Matter.

A force of attraction that holds atom together 
<span>When atoms react they form a chemical bond which is defined as a force of attraction that holds atom together. A force of attraction is defined as a kind of force that draws two or more objects together regardless of distance. There are two major categories of forces of attraction, one is intramolecular and intermolecular. Intramolecular forces is the presence of forces in atoms internally. While intermolecular is the force by which the force that is existent in two or more elements. </span>
7 0
3 years ago
which statement describes the way in which energy moves between a system of reacting substances and surroundings ​
V125BC [204]

The complete question is as follows: Which statement describes the way in which energy moves between a system reacting substances in the surroundings.

A) molecule Collisions transfer thermal energy between the system and its surroundings

B) The thermal energy of the system and it’s surroundings increase

C) The potential energy of the system and it’s surroundings increases

D) molecular collisions create energy that is then released into the surroundings

Answer: The statement, molecule Collisions transfer thermal energy between the system and its surroundings describes the way in which energy moves between a system reacting substances in the surroundings.

Explanation:

When there will occur an increase in kinetic energy of molecules then there will occur more number of collisions.

When kinetic energy between these molecules tends to decrease then they will release heat energy into their surroundings.

As a result, it means that molecule collisions transfer thermal energy between the system and its surroundings.

Thus, we can conclude that the statement molecule Collisions transfer thermal energy between the system and its surroundings describes the way in which energy moves between a system reacting substances in the surroundings.

8 0
3 years ago
What type of energy transformation is taking place when natural gas is used to heat water
kifflom [539]
That is thermal energy 
8 0
3 years ago
Other questions:
  • if you could place a piece of solid silver into a container of liquid silver, would it float or sink? expain. (please answer if
    15·1 answer
  • What is the concentration of H+ ions at a pH = 2?
    11·1 answer
  • A student compares the booking point of substances having different intermolecular forces. Which independent variable did the st
    6·1 answer
  • What is cationic and anionic polymers?
    13·1 answer
  • An empty plastic bottle is sealed in a cool room and then moved to a very hot room. What can best be stated about the air pressu
    6·2 answers
  • The table above shows data collected on five apples while doing field research outside the laboratory. What type of lab equipmen
    12·2 answers
  • The symbol mm represents​
    13·2 answers
  • How is the term stable used in the text?
    8·1 answer
  • Put an x of it is a physical property but of it is a chemical propety pit a +
    5·1 answer
  • Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!