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3 years ago

A sample of a substance has a volume of 60.5ml and a density of 1.20g/ml what is density of magneis

Chemistry

1 answer:

erica [24]3 years ago

8 0

Answer:

m = 72.6 grams

Explanation:

Given that,

The density of the substance uis 1.2 g/mL

Volume, V = 60.5 mL

We need to find the mass of the substance. Density is equal to mass divided by its volume. So, it can be given by :

$d=\dfrac{m}{V}\\\\m=d\times V\\\\m=1.2\ g/mL\times 60.5\ mL\\\\m=72.6\ g$

So, the mass of the substance is 72.6 grams.

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The unique properties of water enable life to exist on Earth. Which of these is a property of pure water?

Lera25 [3.4K]

Answer:

Capillarity , Adhesion and cohesion . The unique property of water enable life to exist . The most important property of water is movement of materials due to water , maintenance and growth and reproduction .

Explanation:

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4 years ago

What does pH measure?

Hatshy [7]

Answer:

Option D

Explanation:

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3 years ago

A 1.25g sample of dry ice is added to a 765mL flask containing nitrogen gas at a temperature of 25.0°C and a pressure of 725 mmH

erica [24]

Answer : The total pressure in the flask is 1.86 atm.

Explanation :

First we have to calculate the pressure of $CO_2$ gas.

Using ideal gas equation :

$PV=nRT\\\\P_{CO_2}=\frac{w}{M}\frac{RT}{V}$

where,

P = Pressure of $CO_2$ gas = ?

V = Volume of $CO_2$ gas = 765 mL = 0.765 L (1 L = 1000 mL)

n = number of moles

w = mass of $CO_2$ gas = 1.25 g

M = molar mass of $CO_2$ gas = 44 g/mol

R = Gas constant = $0.0821L.atm/mol.K$

T = Temperature of $CO_2$ gas = $25.0^oC=273+25.0=298K$

Putting values in above equation, we get:

$P_{CO_2}=\frac{w}{M}\frac{RT}{V}$

$P_{CO_2}=\frac{1.25g}{44g/mol}\frac{(0.0821L.atm/mol.K)\times 298K}{0.765L}=0.909atm$

Now we have to calculate the total pressure in the flask.

$P_T=P_{N_2}+P_{CO_2}$

Given :

$P_{CO_2}=0.909atm$

$P_{N_2}=725mmHg=\frac{725}{760}=0.954atm$

conversion used : (1 atm = 760 mmHg)

Now put all the given values in the above expression, we get:

$P_T=0.954atm+0.909atm=1.86atm$

Therefore, the total pressure in the flask is 1.86 atm.

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3 years ago

The phrase “the danger is in the dose” is sometimes used when describing poisonous (toxic) chemicals. What does this mean?

Lostsunrise [7]

It means it depends on how much of the chemical you have. For ex. if 1 drop of snake venom might not kill you, but 20 drop could definitely kill you. Hope this helps!

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3 years ago

What happens when the particles of a gas collide?

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Answer:

Explanation:

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3 years ago