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3 years ago

What effect do the following have on a population? a. Birth b. Death Immigration d. Emigration

Chemistry

1 answer:

Rufina [12.5K]3 years ago

8 0

The answer is : A. Birth

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A/an _______ is the smallest unit of matter that has the characteristics of a chemical element.

julsineya [31]

Answer:

The answer is atom.

Explanation:

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2 years ago

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The freezing point of water in degrees Celsius is [ Select ] __________. The freezing point of water in degrees Fahrenheit is [

ElenaW [278]

Answer: 0, 32 , 273

Explanation:

The freezing point of water in degree Celsius, Fahrenheit and Kelvin are in the following order; 0 , 32 , 273

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3 years ago

Of the following: H2(g); He(g); CO2(g); which would behave least like an ideal gas? Why?

Margarita [4]

Answer:

CO2(g)

Because CO2 is the larges molecule with specific geometric, therefore it is not likely to behave as an ideal gas.

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3 years ago

What mass of lithium phosphate would you mass to make 2.5 liter of 1.06 M lithium

alex41 [277]

Answer:

Approximately $3.06 \times 10^{2}\; \rm g$ (approximately $306\; \rm g$ .)

Explanation:

Calculate the quantity $n$ of lithium phosphate in $V = 2.5\; \rm L$ of this $c = 1.06\; \rm M = 1.06\; \rm mol \cdot L^{-1}$ lithium phosphate solution.

$\begin{aligned}n &= c \cdot V\\ &= 2.5\; \rm L \times 1.06\; mol \cdot L^{-1}\\ &= 2.65\; \rm mol\end{aligned}$ .

Empirical formula of lithium phosphate: $\rm Li_3PO_4$ .

Look up the relative atomic mass of $\rm Li$ , $\rm P$ ,and $\rm O$ on a modern periodic table:

$\rm Li$ : $6.94$ .
$\rm P$ : $30.974$ .
$\rm O$ : $15.999$ .

Calculate the formula mass of $\rm Li_3PO_4$ :

$M(\rm Li_3PO_4) = 3 \times 6.94 + 30.974 + 4 \times 15.999 = 115.79\; \rm g \cdot mol^{-1}$ .

Calculate the mass of that $n = 2.65\; \rm mol$ of $\rm Li_3PO_4$ formula units:

$\begin{aligned}m &= n \cdot M \\ &= 2.65\; \rm mol \times 115.79\; \rm g\cdot mol^{-1} \\ &\approx 3.06 \times 10^{2}\; \rm g \end{aligned}$ .

5 0

3 years ago

If an object has a mass of 25g and a volume of 5cm what is the density

sergij07 [2.7K]

Density= 5m^3

Explanation:

Here, the Mass of an object is 25g

To convert grams into kilograms, we need to divide 25 by 1000

so, the 25g=25/1000 = 0.025kg.

The volume of an object is given by 5cm^3 ( cubic centimetre)

To convert cubic centimetre to meter cube, we need to divide 5 by 1000.

So, 5cm^3=5/1000=0.005m^3

Finally, the equation of density is

DENSITY= MASS/VOLUME

Density = 0.025/0.005

= 5m^3

Hence, the density of the object is 5m^3.

5 0

3 years ago

What effect do the following have on a population? a. Birth b. Death Immigration d. Emigration​

What effect do the following have on a population? a. Birth b. Death Immigration d. Emigration