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3 years ago

The density of an element is 19.3 g/cm^3. What is its density in kg/m^3?

1 answer:

5 0

First, you need to know 1 kg = 10^3 g. And 1 m^3 = 10^6 m^3. So the 1 g/cm3 = 10^3 kg/m3. So the answer is 1.93*10^4 kg/m3.

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When classified, all living things have

topjm [15]

Answer: 2 or more cells

Explanation:

3 0

2 years ago

Compare and contrast the mass of the object to the size of the object.

TiliK225 [7]

Mass is the amount of matter an object contains, while volume is how much space it takes up. Take a basketball and a bowling ball, their about the same size but the bowling ball is heavier because it contains more matter.

5 0

3 years ago

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

3 years ago

How many grams of water were produced

abruzzese [7]

Answer:

I think it's 8g

Explanation:

I think this is the answer

8 0

2 years ago

Write a condensed structural formula for the repeat unit of the Kevlar molecule

shusha [124]

Explanation:

Kevlar is a fiber which is used in making of bullet proof vests and armors. It is a co-polymer which is formed by condensing two organic molecules 1,4-phenylene-diamine and terephthaloyl chloride.

$NH_2C_6H_4NH_2+Cl-(CO)-C_6H_4-(CO)-Cl\xrightarrow[-2HCl]{ }$

$NH_2-C_6H_4-NH-CO-C_6H_4-COOH$

For Structure refer to image attached.

4 0

3 years ago

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