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3 years ago

The density of water is equal to 1.0 g/cm3. a substance with density equal to 0.9 g/cm3 would _____ in water.

Chemistry

2 answers:

Alborosie3 years ago

6 0

Answer: sink

Explanation:

MrMuchimi3 years ago

3 0

Answer: Float
Explanation: Since water density is 1, substances whose density is less than 1 will float while those whose density is less than 1 will sink.
The more the density of the substance approaches 1, the less part will appear above the water level. Scientist discovered that the density of the substance tell exactly where the substance will be placed.
Example, a substance with density 0.1 then 10% will be below the water line while if the density of the substance is 0.9 then 90% of the substance will be below the water line.

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Suppose two 200.0-L tanks are to be filled separately with the gases helium and hydrogen. What mass of each gas is needed to pro

Aneli [31]

Answer:

Mass of helium = 4426.9524 g

Mass of hydrogen gas = 2213.4762 g

Explanation:

Pressure = 135 atm

Temperature = 24 °C

Volume = 200 L

Number of moles = ?

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T₁ = (24 + 273.15) K = 297.15 K

Using ideal gas equation as:

PV=nRT

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

135 atm × 200 L = n × 0.0821 L.atm/K.mol × 297.15 K

⇒n = 1106.7381 moles

For helium gas:

Molar mass = 4 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$1106.7381= \frac{Mass}{4}$

$Mass= 4426.9524\ g$

For hydrogen gas:

Molar mass = 2 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$1106.7381= \frac{Mass}{2}$

$Mass= 2213.4762\ g$

4 0

3 years ago

A substance that permits the flow of electrons is a(n a. conductor b. insulator

Rainbow [258]

(A)Conductor permits the flow of electrons.

5 0

4 years ago

Read 2 more answers

!!!!!!!!!!! I will mark as brilliant

Vika [28.1K]

Answer:

All matter is made up of tiny particles called atoms. Atoms are made up of three subatomic particles known as proton, neutron and electron. Protons and neutrons are located in the nucleus.

The nucleus is dense and takes up very little space within the atom. All protons have a positive charge and have a mass of about 1 amu. All neutrons have no charge or are neutral and have a mass of about 1 amu.

Electrons are located in the area known as electron cloud. Electrons orbit around the nucleus and have a negative charge

4 0

3 years ago

the process of separating a liquid/solid mixture by slowly pouring the liquid component into a new vessel as the solid settles t

olga55 [171]

The process involving separation of liquid/solid mixture as regards this question is Decantation.

Decantation can be regarded as one of the process used in separation of liquid from solid as well as other immiscible (non-mixing) liquids through the removal of the liquid layer that is present at the top from the layer of solid/liquid which present at the below.

In the process, the liquid will be poured slowly into another vessel as the pouring continues, then the solid will settle in the original vessel.

This process can be done through tilting the mixture after the the top layer have been poured out.

Therefore, decantation is one of the separation technique.

Learn more at: brainly.com/question/16937734?referrer=searchResults

5 0

3 years ago

Question 1:

Gwar [14]

Answer:

1.a

2.c

hope helps

Explanation:

mark

8 0

3 years ago