All categories

2 years ago

Find the density if the mass is 20 grams and the volume is 10 mL?

Chemistry

1 answer:

tatiyna2 years ago

5 0

Answer:

D= 2g/mL

Explanation:

20g/10ml= 2g/mL

You might be interested in

Natation TT mean to genetics

neonofarm [45]

I am not sure what you are asking, but TT likely refers to the pure tall peas Mendel worked with.

4 0

2 years ago

How many moles of h20 are produced from 3 moles of oxygen?

Ierofanga [76]

Answer:

Stoichiometric Values in a Chemical Reaction

Explanation:

The coefficients next to the reactants and products are the stoichiometric values. They represent the number of moles of each compound that needs to react so that the reaction can go to completion.

6 0

2 years ago

What instrument measures the flow rate of a liquid by comparing the flow through two sections of tapered pipe?

Alexeev081 [22]

Turbine flow meter is the answere

5 0

3 years ago

What is the pH of a 0.1M basic solution? A. 7 B. 0 C. 1 D. 13

Cloud [144]

C is the correct answer

4 0

3 years ago

An unknown sample weighing 0.3512g was added to 20.0 mL of cyclohexane. The density of cyclohexane is 0.779g/mL, and the freezin

rjkz [21]

Explanation:

It is known that density is mass of a substance divided by its volume.

Mathematically, Density = $\frac{mass}{volume}$

Therefore, calculate the mass of cyclohexane as follows.

mass of cyclohexane = Density × volume

= $0.779 g/mL \times 20 mL$

= 15.58 g

or, = 0.01558 kg (as 1 kg = 1000 g)

As, K_{f} of cyclohexane = $20^{o}C/m$

$\Delta T_{f} = K_{f} \times molality$

$5.2 = 20 \times molality$

molality = $\frac{5.2}{20}$

= 0.26 m

Also, molality is the number of moles of solute present in kg of solvent.

Mathematically, molality = $\frac{\text{no. of moles}}{\text{mass of solvent}}$

0.26 = $\frac{\text{no. of moles}}{0.01558}$

No. of moles = $4.05 \times 10^{-3}$

As, No. of moles = $\frac{mass}{\frac{molar mass}}$

$4.05 \times 10^{-3} = \frac{0.3512}{\text{molar mass}}$

molar mass = 87.0 g/mol

Thus, we can conclude that molar mass of unknown substance is 87.0 g/mole.

4 0

2 years ago