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3 years ago

The density of a substance with a mass of 40.0g and a volume of 10ml is?

1 answer:

3 0

In this experiment you will determine the density of an unknown liquid. You will measure the mass of a known volume delivered from a pipet and use the expression:

M
VD=

where D = density, M = mass and V = volume to calculate the density of the unknown liquid.

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For many purposes we can treat propane (CH) as an ideal gas at temperatures above its boiling point of - 42°C. Suppose the tempe

fredd [130]

Answer: The final pressure is 0.81 kPa

Explanation:

The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas = 0.58 kPa

$P_2$ = final pressure of gas = ?

$V_1$ = initial volume of gas = v

$V_2$ = final volume of gas = $v-\frac{40}{100}\times v=0.6v$

$T_1$ = initial temperature of gas = $25^0C=(25+273)K=298K$

$T_2$ = final temperature of gas = $-22^0C=(-22+273)K=251K$

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

$\frac{0.58\times v}{298}=\frac{P_2\times 0.6v}{251}$

$P_2=0.81kPa$

The final pressure is 0.81 kPa

3 0

2 years ago

Knowing how fossils form, do you think it’s likely that humans will ever piece together a complete fossil record for every speci

Virty [35]

Answer:

yes

Explanation:

since humans dig out the earth for resources o believe that fossils far every species that exists and is extinct will be found and will be pieced together

6 0

3 years ago

Read 2 more answers

Give atleast 5 differences in cell structures of plant and animal cells

Molodets [167]

The shape, the cell wall, chlorophyll, the components of the nucleus, cytoplasm

8 0

2 years ago

Which is a form of heat transfer that is reduced by using a potholder when taking a hot dish out of an oven? Please answer quick

Angelina_Jolie [31]

Answer:

i belive your talking about Conduction

Explanation:

if im

wrong comment

3 0

2 years ago

A colligative property of a solution is one that depends 1. on the identity of the solute and the concentration of the solution.

Tanzania [10]

Answer:

The correct answer is option 2.

Explanation:

Colligative property is defined as property which depends upon only on the numbers of particles of solute dissolved in definite amount of solvent, It do not depend on the nature of the solute.

For example : NaCl solution with 0.4 molal will show same colligative properties as a that of the glucose solution with 0.04 molal concentration.

The following are the examples of colligative property:

1. Relative lowering of vapor pressure.

2. Osmotic pressure

3. Elevation in boiling points

4. Depression in freezing point

5 0

2 years ago