All categories

3 years ago

Choose all the answers that apply.

Chemistry

1 answer:

vovangra [49]3 years ago

7 0

Diabetes, ALS, and Alzheimeir's.

If this was the appropriate answer make sure to mark as the brainliest!
-procklown

You might be interested in

HURRY

zmey [24]

Answer:

Percent yield of reaction is 75%.

Explanation:

Given data:

Moles of A = 2.0 mol

Moles of B = 4.0 mol

Moles of C formed = 1.8 mol

Percent yield of reaction = ?

Solution:

Chemical equation:

2A + 5B → 3C + D

We will compare the moles of A and B with C from balance chemical equation.

A : C

2 : 3

B : C

5 : 3

4 : 3/5×4 = 2.4 mol

Number of moles of C formed by 4 moles B are less thus B is limiting reactant and will limit the yield of C.

Percent yield:

Percent yield = actual yield /theoretical yield × 100

Percent yield = 1.8 mol / 2.4 × 100

Percent yield =75%

8 0

3 years ago

The molar heat of vaporization for methane, CH4, is 8. 53 kJ/mol. How much energy is absorbed when 54. 8 g of methane vaporizes

alexandr402 [8]

Molar heat of vaporization is defined as the heat absorbed by one mole of substance to convert from liquid to gas.

<h3>How do you calculate the heat of vaporization?</h3>

The formula used to calculate the heat of vaporization is:

$\rm Q &= n \times \Delta H$

Where,

Q = Amount of Heat

n = number of moles of a substance

$\Delta H =$ molar enthalpy of fusion

Now, to calculate the moles of methane:

$\rm Moles &= \dfrac{Mass \;of\; methane }{Molar\; Mass\; of \; Methane} &= \dfrac{54.8\;g}{16\;g/mol}$

Moles = 3.425 mol

Now, 1 mol of methane absorbs = 8.53 KJ

3.425 mol of methane absorbs = $3.424 \times 8.53 &= 29.1 KJ$

Thus, the energy is absorbed till the methane vaporizes at its boiling point is 29.1 KJ.

Learn more about <u>vaporization </u>here:

brainly.com/question/2491083

7 0

3 years ago

Which of the following causes tornadoes

Shkiper50 [21]

Cool dry air meeting warm Moist air

7 0

3 years ago

Read 2 more answers

Which substance may lower air temperatures after a volcanic eruption? lava O sulfur dioxide O carbon dioxide O water vapor

IrinaVladis [17]

I think it’s sulfur dioxide

8 0

3 years ago

Read 2 more answers

A type of force where objects touch each other

leonid [27]

Answer:

contact force

Explanation:

I have no idea why

3 0

2 years ago