All categories

3 years ago

Use what you know about endothermic and exothermic reactions to explain the differences in the graphs above

Chemistry

1 answer:

Yakvenalex [24]3 years ago

4 0

Answer:

yes I do

But I can't see the question very well

Explanation:

You might be interested in

How many milliliters of a 6.00 M NaCl solution are needed to make 250.0 milliliters of a 0.500 M NaCl solution?

kenny6666 [7]

Answer:

20,8ml NaCl 6M

Explanation:

C1V1 = C2V2

4 0

3 years ago

2 Na + Cl2 → 2 NaCl

Ksivusya [100]

Approximately 71.77 grams. I think so

8 0

3 years ago

Read 2 more answers

If a chemical is oxidized it is also known as the

RUDIKE [14]

Answer:

D.) reducing agent

Explanation:

Oxidized chemicals gain electrons. In order to gain these electrons, another chemical must lose electrons. So, the chemical (which will be oxidized) acts as a reducing agent, causing the other chemical to be reduced and lose electrons.

4 0

2 years ago

100. mg of an unknown protein are dissolved in enough solvent to make 5.00mL of solution. The osmotic pressure of this solution

PolarNik [594]

<u>Answer:</u> The molar mass of the unknown protein is 6387.9 g/mol

<u>Explanation:</u>

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iMRT$

or,

$\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT$

where,

$\pi$ = osmotic pressure of the solution = 0.0766 atm

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of protein = 100. mg = 0.100 g (Conversion factor: 1 g = 1000 mg)

Molar mass of protein = ?

Volume of solution = 5.00 mL

R = Gas constant = $0.0821\text{ L atm }mol^{-1}K^{-1}$

T = temperature of the solution = $25^oC=[25+273]K=298K$

Putting values in above equation, we get:

$0.0766atm=1\times \frac{0.100\times 1000}{\text{Molar mass of protein}\times 5}\times 0.0821\text{ L. atm }mol^{-1}K^{-1}\times 298K\\\\\pi=\frac{1\times 0.100\times 1000\times 0.0821\times 298}{0.0766\times 5}=6387.9g/mol$

Hence, the molar mass of the unknown protein is 6387.9 g/mol

5 0

4 years ago

Select all of the answers that apply. Water vapor _____. is moisture in the air or humidity, is highest in desert climates, come

Likurg_2 [28]

Water vapor is moisture in the air or humidity, they results from the evaporation of water, it also traps heat, and condenses to make clouds. Water vapor is water in its gaseous state instead of liquid or solid . It is extremely important to the weather and climate.

4 0

3 years ago

Read 2 more answers