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4 years ago

A compound composed of only sulfur and aluminum is analyzed. The mass ratio of aluminum to sulfur is found to be 1.00:1.78.

Chemistry

2 answers:

marta [7]4 years ago

6 0

Answer:

a. Al2S3.

Explanation:

Molar mass of Al = 26.98

Molar mass of S = 32.06.

Ratio of AL:S is 1 : 1.78

Dividing by the moles we get:

0.0371 : 0.0555

= 1 : 1.5

So its Al2S3.

shusha [124]4 years ago

6 0

Answer:

Explanation:

skd kc

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CALCULATE THE VOLUME OF 16 g OF OXYGEN GAS AT S.T.P?

White raven [17]

Answer:

To calculate the volume we must first find the number of moles

Number of moles (n ) = mass / Molar mass (M)

Since oxygen is diatomic

M of oxygen = 16 × 2 = 32g/mol

n = 16 / 32 = 0.5mol

Next we use the formula

V = n × V(dm³)

where V is the volume

V(dm³) is the volume of 1 mole of a substance at s.t.p which is

22.4dm³

Volume of oxygen gas at s.t.p is

0.5 × 22.4dm³

= 11.20dm³

Hope this helps you

7 0

3 years ago

5. Write a short explanation for why simple molecular substances have no electrical

scZoUnD [109]

Simple molecules have no overall charge, or charged particles that can separate, so simple molecular substances cannot conduct electricity, even when liquid or dissolved in water.

7 0

3 years ago

A gas with a volume of 8 L at a temperature of 473K is switched to a new container with a temperature of 350K. If the pressure r

Digiron [165]

Answer:

The new volume is 5.92 L, which is approximately 6 L

Explanation:

As the gas temperature increases, the molecules move faster and take less time to reach the walls of the container. This means that the number of crashes per unit of time will be greater. That is, there will be an increase (for an instant) in the pressure inside the container and the volume will increase.

So Charles's Law is one of the gas laws that relates the volume and temperature of a certain amount of gas at constant pressure and says that:

If the temperature increases the volume increases

If the temperature decreases the volume decreases

Mathematically this is expressed by:

$\frac{V}{T}=k$

When you want to study two different states, an initial and a final one of a gas, this law is expressed by:

$\frac{V1}{T1} =\frac{V2}{T2}$

In this case:

V1: 8 L
T1: 473 K
V2: ?
T2: 350 K

Replacing:

$\frac{8 L}{473K} =\frac{V2}{350K}$

Solving:

$V2=350K*\frac{8L}{473K}$

V2=5.92 L

<u><em>The new volume is 5.92 L, which is approximately 6 L</em></u>

5 0

3 years ago

The type of Heat transfer from one particle to another by direct contact is called:

const2013 [10]

Answer:

I believe the answer is conduction.

7 0

2 years ago

3 difference between Homogeneous mixture and Heterogeneous Mixture

miv72 [106K]

Answer:

Difference between Homogeneous mixture and Heterogeneous Mixture are as follows:

A mixture or sample that is consist of uniform composition and properties is called a homogeneous mixture while a mixture or sample that is consist of different composition and properties is called a heterogeneous mixture.
Homogenous mixture has only single phase while heterogeneous mixture has two or more phases.
Homogenous mixture can not be separated by physical methods while heterogeneous mixture can be separated out physically.
Example of homogenous mixture is Water and sugar and heterogeneous mixture is oil and water.

7 0

3 years ago