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
Ahat [919]
3 years ago
13

A liquid that occupies a volume of 9.0 L has a mass of 7.2 kg. What is the density of the liquid in kg/L

Chemistry
1 answer:
babunello [35]3 years ago
3 0

Answer:

<h2>Density = 0.8 kg/L</h2>

Explanation:

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

<h3>Density =  \frac{mass}{volume}</h3>

From the question

mass = 7.2 kg

volume = 9.0 L

Substitute the values into the above formula and solve for the density

That's

<h3>Density =  \frac{7.2}{9}</h3>

We have the final answer as

<h3>Density = 0.8 kg/L</h3>

Hope this helps you

You might be interested in
How many atoms are there in 8.88 g Si?
Mariana [72]

Answer:

\boxed {\boxed {\sf 1.90 \times 10^{23} \ atoms \ Si}}

Explanation:

We are asked to find how many atoms are in 8.88 grams of silicon.

<h3>1. Grams to Moles </h3>

First, we convert grams to moles. We use the molar mass or the mass of 1 mole of a substance. These values are found on the Periodic Table as they are equal to the atomic masses, but the units are grams per mole instead of atomic mass units.

Look up silicon's molar mass.

  • Si:  28.085 g/mol

We will convert using dimensional analysis. Set up a conversion factor with the molar mass.

\frac { 28.085 \ g \  Si}{1 \ mol \ Si}

We are converting 8.88 grams of silicon to moles, so we multiply by this value.

8.88 \ g \ Si *\frac { 28.085 \ g \  Si}{1 \ mol \ Si}

Flip the fraction so the units of grams of silicon cancel.

8.88 \ g \ Si *\frac{1 \ mol \ Si} { 28.085 \ g \  Si}

8.88  *\frac{1 \ mol \ Si} { 28.085 }

\frac {8.88} { 28.085 } \ mol \ Si

0.316183015845 \ mol \ Si

<h3>2. Moles to Atoms </h3>

Next, we convert moles to atoms. We use Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are atoms of silicon.

Set up another conversion factor.

\frac {6.022 \times 10^{23} \ atoms \ Si}{1 \ mol \ Si}

Multiply by the number of moles we calculated.

0.316183015845\ mol \ Si *\frac {6.022 \times 10^{23} \ atoms \ Si}{1 \ mol \ Si}

The units of moles of silicon cancel.

0.316183015845 * \frac {6.022 \times 10^{23} \ atoms \ Si}{1}

0.316183015845 * {{6.022 \times 10^{23} \ atoms \ Si}

1.90405412 \times 10^{23} \ atoms \ Si

<h3>3. Significant Figures</h3>

The original measurement of 8.88 grams has 3 significant figures, so our answer must have the same.

For the number we calculated, that is the hundredth place. The 4 in the thousandth place tells us to leave the 0 in the hundredth place.

1.90 \times 10^{23} \ atoms \ Si

<u>8.88 grams of silicon contains 1.90 ×10²³ atoms of silicon.</u>

6 0
3 years ago
Which skeleton equation represents a neutralization reaction? Mg + O2 MgO AlCl3 Al + Cl2 Li + HNO3 H2 + LiNO3 HBr + LiOH LiBr +
creativ13 [48]
Neutralization reaction is the reaction between acid and base.
There the neutralization reaction is:

HBr + LiOH ----------> LiBr + H2O.

Hope this helps!
5 0
3 years ago
Read 2 more answers
How many grams of MgO are needed to produce 264.0 grams of Mg(OH)2?
sergij07 [2.7K]
15396 g
tell me if its correct
7 0
3 years ago
Scientists frequently use all of the following to support the theory that organisms change over time except.
Pie

Answer:

4

Explanation:

8 0
3 years ago
Read 2 more answers
Вывести формулу оксигенсодержащего соединения, если массовая доля карбона в нем 52,2%, а гидрогена 13%
satela [25.4K]
No depot wey sorrey jauja ]>
6 0
2 years ago
Other questions:
  • Predict the sign of ΔSsys for each of the following processes. Which are positive? (a) Gasoline vapors mix with air in a car eng
    6·1 answer
  • What system of units is used by only a small number of countries in the world, including the U.S.?
    8·1 answer
  • The vocabulary terms MASS and WEIGHT have the same meaning, they both mean the amount of matter in an object true or false
    6·1 answer
  • Cobalt III hydroxide and nitric acid react according to the following balanced equation:
    7·1 answer
  • What is the molality of a solution
    9·1 answer
  • C2h6o how many moles of ethanol are present in a 10.0 g sample of ethanol
    13·2 answers
  • Given the heat change per mole for the combustion of methanol (-726 kJ/mol), predict the heat change that would occur if 0.200 m
    5·1 answer
  • Non motile in an sentences
    8·1 answer
  • Sam got 10 cookies and his sister took 3 away from him. How much does sam have left?<br><br>​
    12·1 answer
  • Please only answer if you know the actual thing, don't search it up! Are these correct? :P
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!