3 years ago

Someone help me pls will make you as brain

Chemistry

2 answers:

lesantik [10]3 years ago

5 0

Answer:

i think so 1 and 3 is the correct answer...................

Pie3 years ago

3 0

I also think it’s one and three

You might be interested in

Mention 7 organic compound from plant origin

storchak [24]

Answer:

carbohydrates, lipids, proteins, nucleic acids

5 0

3 years ago

0. Earth's rock is continually cycling through different states and locations. The diagram below shows the rock cycle. The label

cestrela7 [59]

Answer:

Chemical changes due to heat and pressure

Explanation:

Just took the test, hope this helps! :)

7 0

3 years ago

Read 2 more answers

A small cup of water is left out on the counter. Three days later, the water is gone. Which phase change describes what has occu

kupik [55]

I believe that it should be water evaporation

8 0

4 years ago

Read 2 more answers

The diameter of a circular swimming pool is 12 feet. Find circumference Round to the nearest tenth . Use 3.14 for pi

-BARSIC- [3]

Answer:

the pool's circumference is 37.7 ft^2 (rounded to nearest tenth).

6 0

3 years ago

10. Hydrogen peroxide (H2O2: M = 34 g mol-1) is a powerful oxidising agent that is used in concentrated solution in rocket fuel

Lubov Fominskaja [6]

Answer:

The molality of solution=12.605 m

Explanation:

We are given that

Molar mass of Hydrogen peroxide, M=34 g/mol

Density of solution, $\rho=1.11gcm^{-3}$

30% Means mass of solute (Hydrogen peroxide)=30 g

Mass of solvent =100-30=70 g

Total mass of solution, m=100 g

Number of moles of solute= $\frac{given\;mass}{molar\;mass}$

Using the formula

Number of moles of hydrogen peroxide= $\frac{30}{34}$

Now, molality of solution

$m=\frac{number\;of\;moles\;of\;solute}{mass\;of\;solvent}\times 1000$

$m=\frac{30}{70\times 34}\times 1000$

$m=12.605 m$

Hence, the molality of solution=12.605 m

6 0

4 years ago