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
krok68 [10]
3 years ago
11

What is the density of an object that has a mass of 21 g and a volume of 9 ml?

Chemistry
1 answer:
mylen [45]3 years ago
5 0

The formula is density = mass / Volume

density = ?

mass = 21 g

Volume = 9 mL

d = m / V

d = 21 g / 9 mL

d = 2.3 g/mL

Hope this help!


You might be interested in
What are some chemical properties of Nitrogen?
Arturiano [62]

Some chemical properties of nitrogen are...Nitric acid salts, potassium nitrate, trinitrotoluene, ammonium nitrate, and nitro-glycerine.

5 0
4 years ago
1. What is the potential energy of a 8 kg ball that is at a height of 20 m?
weqwewe [10]

Answer:

1. 1568 J

2. 0 J

3. 1176 J

Explanation:

PE = mgh

(PE = Potential Energy) = (m = mass)(g = gravitational force which is 9.8)(h = height)

1. (3)(9.8)(20) = 1568 J

2. PE = (3)(9.8)(0) = 0 J

3. (5)(9.8)(24) =  1176 J

4 0
3 years ago
Butters can jump 5.5 feet. How many inches can he jump? (12 in = 1 ft)
olchik [2.2K]

Answer:66

Explanation:

5.5 feet is 66 inches

7 0
3 years ago
Read 2 more answers
For the chemical reaction:
Julli [10]

Answer:

Volume of ammonia produced = 398.7 dm³

Explanation:

Given data:

Volume of N₂ = 200 dm³

Pressure and temperature = standard

Volume of ammonia produced = ?

Solution:

Chemical equation:

N₂ + 3H₂     →      2NH₃

Number of moles of N₂:

PV = nRT

1 atm× 200 L = n× 0.0821 atm.L/mol.K × 273 K

n = 200 atm.L /22.41 atm.L/mol

n = 8.9 mol

Now we will compare the moles of ammonia and nitrogen.

               N₂          :         NH₃

                1            :           2

              8.9          :        2/1×8.9 = 17.8 mol

Volume of ammonia:

1 mole of any gas occupy 22.4 dm³ volume

17.8 mol ×22.4 dm³/1 mol = 398.7 dm³

4 0
3 years ago
How many grams of water vapor (H2O) are in a 10.2-liter sample at 0.98 atmospheres and 26°C?
diamong [38]
Hey there! 

<span>Use the equation of Clapeyron:
</span>
T in kelvin :

26 + 273.15 => 299.15 K

R = 0.082

V = 10.2 L

P = 0.98 atm

number of moles :

P *V = n * R * T

0.98 * 10.2 =  n * 0.082 * 299.15

9.996 = n * 24.5303

n = 9.996 / 24.5303

n = 0.4074 moles

Therefore:

Molar mass H2O = 18.01 g/mol

1 mole H2O ------------- 18.01 g
0.4074  moles ----------- m

m = 0.4074 * 18.01 / 1

m = 7.339 g of H2O
5 0
4 years ago
Other questions:
  • For the following reaction, C6H12O6 and O2 are the
    5·1 answer
  • What mass of KCL is contained in .350 M solution of KCL?
    7·1 answer
  • If the atom has a MASS of 127 and 45 NEUTRONS, then it contains how many <br> PROTONS<br> 
    14·1 answer
  • Who is boo johnson ??
    6·2 answers
  • A sample of neon gas at 25.0°C has a volume of 42.4 L and a pressure of 1.40 atm. How many moles of neon are there? NOTE: You mu
    15·1 answer
  • which method would be best for separating the compounds of a mixture that is made from two diffrent liquids
    14·1 answer
  • A sample of gas has a pressure of 600 volume of 2.5 L, and a temperature of 22°C . If the pressure is changed to 760 mmHg and th
    6·1 answer
  • Which of the following elements would form the smallest ionic radius and why?
    15·1 answer
  • Scientific hypotheses differ from scientific theories in that they are
    6·1 answer
  • How many variance electrons in Aluminium? Is it 3
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!