Ask question

Ask question

All categories

2 years ago

13

Aquafers are bodies of water found above ground with thriving ecosystems. O True O False

1 answer:

BaLLatris [955]2 years ago

8 0

Answer:

true

Explanation:

You might be interested in

Consider the chemical equation for the production of water: 2 H2+O2→2 H2O. If 100 grams of oxygen gas are used, what would the p

Cerrena [4.2K]

Answer:

The percentage yield of water is 66.67%.

Explanation:

$2H_2+O_2\rightarrow 2H_2O$

Mass of oxygen gas = 100 g

Moles of oxygen gas = $\frac{100 g}{32 g/mol}=3.125 mol$

According to reaction, 1 mole of oxygen gives 2 moles of water, then 3.125 moles of oxygen will give:

$\frac{2}{1}\times 3.125 mol=6.25 mol$

Mass of 6.25 moles of water :

6.25 mol × 18 g/mol = 112.5 g

Theoretical yield of water = 112.5 g

Experimental yield of water = 75 g

Percentage yield :

$=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

$=\frac{75 g}{112.5 g}\times 100=66.67\%$

The percentage yield of water is 66.67%.

4 0

2 years ago

a sample of sucrose was burned in a calorimeter, and 41,600 joules oh heat energy were released. which statement is true about t

Gala2k [10]

It absorbed 41,600 joules.

Explanation:

If the sample of sucrose burnt in the calorimeter releases 41600Joules of heat, then the water in the calorimeter will absorb 41600J.

The heat lost by burning the sucrose in the calorimeter is also the heat gained by the water therein.

A calorimeter is a device by prevents heat loss to the environment in any form.

It is specially designed to minimize heat loss by conduction, convection radiation.

Therefore, since no heat is lost, the heat released by burning the sucrose is used in heating the water there.

learn more:

Specific heat brainly.com/question/7210400

#learnwithBrainly

5 0

2 years ago

A solution contains two isomers, n-propyl alcohol and isopropyl alcohol, at 25°C. The total vapor pressure is 38.6 torr. What ar

Leona [35]

Answer:

Mole fraction of alcohols in liquid phase $x_1=0.2727\& x_2=0.7273$ .

Mole fraction of alcohols in vapor phase $y_1=0.1468\& y_2=0.8516$ .

Explanation:

The total vapor pressure of the solution = p =38.6 Torr

Partial vapor pressure of the n-propyl alcohol = $p^{o}_1=21.0 Torr$

Partial vapor pressure of the isopropyl alcohol = $p^{o}_2=45.2 Torr$

$p=x_1\times p^{o}_1+x_2\times p^{o}_2$ (Raoult's Law)

$p=x_1\times p^{o}_1+(1-x_1)\times p^{o}_2$

$38.6 Torr=x_1\times 21.0 Torr+(1-x_1)\times 45.2 Torr$

$x_1=0.2727$

$x_2=1-0.2727=0.7273$

$x_1\& x_2$ is mole fraction in liquid phase.

Mole fraction of components in vapor phase $y_1\& y_2$

$p_1=y_1\times p$ (Dalton's law of partial pressure)

$y_1=\frac{p_1}{38.6 Torr}=\frac{p^{o}_1\times x_1}{38.6 Torr}$

$y_1=\frac{21.0 Torr\times 0.2727}{38.6 Torr}=0.1468$

$y_1=\frac{p_2}{38.6 Torr}=\frac{p^{o}_2\times x_2}{38.6 Torr}$

$y_2=\frac{45.2 Torr\times 0.7273}{38.6 Torr}=0.8516$

Mole fraction of alcohols in vapor phase $y_1=0.1468\& y_2=0.8516$

5 0

2 years ago

When measuring the volume of an object you are finding the?

marta [7]

Answer:

C. Amount of 3 dimensional space the object occupies

Explanation:

Single dimension is a laminar

Amount of 2 dimension is area

Amount of 4 dimension is negligible

$.$

7 0

3 years ago

Which statement about organic matter is false? A. Organic matter comes from organisms. B. Organic matter contains the element, c

siniylev [52]

B. Organic matter contains the element, carbon.

3 0

2 years ago

Read 2 more answers