______ is anything that has mass and takes up space

Brums [2.3K]

Answer: Graphite is nonpolar carbon which associates with the nonpolar hexanes. The cellulose in the exposed paper contains polar regions that are attracted to the polar water.

Explanation:

3 0

3 years ago

Refer to the balanced equation. (PLEASE HELP QUICK)

kolezko [41]

Answer: C) $5.12\times 10^1$ L $Cl_2$

Explanation: $8H_2S+8Cl_2\rightarrow S_8+16HCl$

According to Avogadro's law, 1 mole of every gas occupies 22.4 Liters at STP.

Thus from the balanced chemical equation, 8 moles of hydrogen sulfide reacts with 8 moles of chlorine gas.

i.e 8 moles of hydrogen sulfide reacts with $=8\times 22.4L=179.2L$ of chlorine gas.

2.28 moles of hydrogen sulfide reacts with $=\frac{179.2}{8}\times 2.28=51.2L=5.12\times 10^1L$ of chlorine gas.

6 0

4 years ago

Water can keep engines operating at low temperatures. Which property of water most likely gives it this ability?

AVprozaik [17]

Answer:

B: it has a high heat capacity

Explanation:

When any material has a high specific heat capacity/ heat capacity, it doesn't heat or cool very fast. So water can absorb more heat from the engine and can keep the engine cool or at low temperature for a longer period of time.

6 0

3 years ago

To make lemonade, a recipe requires 4 lemons, 30 ounces of sugar, and 2 pints of water. From an average lemon one can squeeze ou

tresset_1 [31]

Answer:

She will need to add 5.6 cups of water

Explanation:

Hi there!

Marta has to dilute the citric acid to 5%.

The dilution factor will be 12%/ 5% = 2.4. Then, Marta will need to dilute the citric acid 2.4 times. If she has 4 cups of the solution, she will need to add water until she completes a volume of (4 cups ·2.4) 9.6 cups to reach the desired concentration.

Then, she will need to add 9.6 - 4 cups water = 5.6 cups of water

Another way to solve this is by using the fact that the mass of citric acid in the concentrated and diluted solution is the same. Then:

mass citric acid concentrated solution = mass citric acid in dilute solution

mass of citric acid = concentration · volume

Then:

initial concentration · volume = final concentration · volume

12% · 4 cups = 5% · volume

volume = 12% · 4 cups / 5% = 9.6 cups

The final volume of the solution at 5% will be 9.6 cups. So Marta will need 9.6 cups - 4 cups = 5.6 cups water

3 0

4 years ago

In a laboratory experiment, students synthesized a new compound and found that when 7.229 grams of the compound were dissolved i

STALIN [3.7K]

The question is incomplete, here is the complete question:

The common laboratory solvent chloroform is often used to purify substances dissolved in it. The vapor pressure of chloroform, CHCl₃, is 173.11 mm Hg at 25°C.

In a laboratory experiment, students synthesized a new compound and found that when 7.229 grams of the compound were dissolved in 207.8 grams of chloroform, the vapor pressure of the solution was 170.51 mm Hg. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight of this compound?

<u>Answer:</u> The molecular mass of the compound is 481.9 g/mol

<u>Explanation:</u>

The equation used to calculate relative lowering of vapor pressure follows:

$\frac{p^o-p_s}{p^o}=i\times \chi_{solute}$