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3 years ago

Explain why there is a need for an universal system of measurement. Why is the metric system of measurement convenient to use

Chemistry

1 answer:

docker41 [41]3 years ago

4 0

Answer:

I am not sure

Explanation:

sorry

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What is the volume of the rectangular prism below? A.38,832 mm3 B.480,000 mm3 C.499,200 mm3 D.501,120 mm3

Mkey [24]

Answer:

Explanation:

8 0

3 years ago

Two unknown molecular compounds were being studied. A solution containing 5.00 g of compound A in 100. g of water froze at a low

LenaWriter [7]

Answer:

Compound B has greater molar mass.

Explanation:

The depression in freezing point is given by ;

$\Delta T_f=i\times k_f\times m$ ..[1]

$m=\frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Mass of solvent in kg}}$

Where:

i = van't Hoff factor

$k_f$ = Molal depression constant

m = molality of the solution

According to question , solution with 5.00 g of A in 100.0 grams of water froze at at lower temperature than solution with 5.00 g of B in 100.0 grams of water.

The depression in freezing point of solution with A solute: $\Delta T_{f,A}$

Molar mass of A = $M_A$

The depression in freezing point of solution with B solute: $\Delta T_{f,B}$

Molar mass of B = $M_B$

$\Delta T_{f,A}>\Delta T_{f,B}$

As we can see in [1] , that depression in freezing point is inversely related to molar mass of the solute.

$\Delta T_f\propto \frac{1}{\text{Molar mass of solute}}$

$M_A$

This means compound B has greater molar mass than compound A,

4 0

3 years ago

Based on what you’ve determined regarding one mole of sand and one mole of water, which statements must be correct? Select all t

Igoryamba

Answer:

-The mole is appropriate only for counting things that are very small.

-One mole is a very large number of something.

-A molecule of water is much smaller than a grain of sand.

Explanation:

8 0

3 years ago

Which element or elements are unbalanced in this equation?

Stells [14]

Answer:

Only the H is unbalanced.

Explanation:

There are 4 H's and 2 of everything else

7 0

4 years ago

Read 2 more answers

The density of ethanol, a colorless liquid that is commonly known as grain alcohol, is 0.798 g/mL Calculate the mass of 205 mL o

katovenus [111]

Answer:

Mass of 205 mL of the liquid is 164 g

Explanation:

We know, $density=\frac{mass}{volume}$

Here density of liquid is 0.798 g/mL and volume of liquid is 205 mL

So, mass of liquid = $density\times volume$

= $(0.798 g/mL)\times (205 mL)$

= 164 g

hence mass of 205 mL of the liquid is 164 g.

8 0

4 years ago