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
elixir [45]
3 years ago
13

How many moles are in 36.0g. of H2O?

Chemistry
2 answers:
vampirchik [111]3 years ago
8 0

Answer:

2.0 moles

Explanation:

The relationship between the number of moles of a given substance present in a sample and the mass of the sample is given by the molar mass of the substance.

For any chemical species, you have

molar mass

=

the mass of exactly 1 mole

water has a molar mass of

18.015 g mol

−

1

which means that

1

mole of water has a mass of

18.015 g

.

18.015 g mol

−

1

=

18.015 g

1 mole H

2

O

So for every

18.015 g

of water present in your sample, you have

1

mole of water.

This means that your

36-g

sample will contain

36

g

⋅

given by the molar mass of H

2

O



1 mole H

2

O

18.015

g

=

2.0 moles H

2

O

~~~

The answer must be rounded to two sig figs, the number of sig figs you have for the mass of water.

Explanation:

vazorg [7]3 years ago
5 0
Answer: 2 Moles

Explanation: Moles = Mass of chemical in grams (in this case 36.0g) ➗ Relative Atomic Mass of chemical (H2O = 18)

36 ➗ 18 = 2
You might be interested in
Compounds A, B, and C react according to the following equation. 3A(g) + 2B(g) 2C(g) At 100°C a mixture of these gases at equili
Vedmedyk [2.9K]

Answer:

The value of Kc for the reaction is 3.24

Explanation:

A reversible chemical reaction, indicated by a double arrow, occurs in both directions: reagents transforming into products ( direct reaction) and products transforming back into reagents (inverse reaction)

Chemical Equilibrium is the state in which direct and indirect reactions have the same reaction rate. Then taking into account the rate constant of a direct reaction and its inverse the chemical constant Kc is defined.

Being:

aA + bB ⇔ cC + dD

where a, b, c and d are the stoichiometric coefficients, the equilibrium constant with the following equation:

Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }

Kc is equal to the multiplication of the concentrations of the products raised to their stoichiometric coefficients divided by the multiplication of the concentrations of the reagents also raised to their stoichiometric coefficients.

Then, in the reaction 3A(g) + 2B(g) ⇔ 2C(g),  the constant Kc is:

Kc=\frac{[C]^{2} }{[A]^{3} *[B]^{2} }

where:

  • [A]= 0.855 M
  • [B]= 1.23 M
  • [C]= 1.75 M

Replacing:

Kc=\frac{1.75^{2} }{0.855^{3}*1.23^{2}  }

Solving you get:

Kc=3.24

<u><em>The value of Kc for the reaction is 3.24</em></u>

8 0
3 years ago
What is another way of describing a freezing point change?
Paladinen [302]
Melting is equivalent to freezing: a temperature when a solid become a liquid.
7 0
3 years ago
Read 2 more answers
A student is a passenger in the front seat of a moving car. Which object is the BEST frame of reference for the student to deter
Brrunno [24]

Answer:

the sing post

Explanation:

because the reference frame is a fixed object that determines whether a body is in motion or not so the other passengers are fixed but relative to the the the man is at rest but relative to the sign post it is in the motion, did I get me, sister

5 0
2 years ago
Which property is shared between liquids that are used in thermometers.
miv72 [106K]

Answer:

the property that is shared between liquids us called thermometric property your welcome

8 0
2 years ago
2.04 thermal and chemical change
bazaltina [42]

Explanation:

thermal changes are those in which heat exchange is involved like endothermic and exothermic

while in chemical changes collision between the reactant occurs which result into product

8 0
1 year ago
Other questions:
  • PLEASE HELP!! STOICHIOMETRY!
    9·1 answer
  • Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and potassium chloride when heated. KClO3(s) → K
    6·1 answer
  • You will be adding a solution containing potassium carbonate to a solution containing hydrochloric acid. What risk is associated
    13·1 answer
  • Which combustion equation violates the law of conservation of matter? A) CH4 + 2O2 -&gt; CO2 + 2H2O B) C3H8 + 6O2 -&gt; 3CO2 + 4
    5·2 answers
  • If you have 3.48 x 1023 formula units of Lead (II) Permanganate, what is its mass?
    10·1 answer
  • What scientist determined that atomic mass did not determine the pattern of the periodic table? A. James Watson B. Henry Moseley
    13·1 answer
  • Why do pengiuns have beards
    14·2 answers
  • Relative mass each element contributes to the mass as a whole is _________.
    15·1 answer
  • How many moles of AIC3 are there in 1,119.972 g ?
    5·1 answer
  • What reagent is used to detect the presence of starch?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!