Why do students fail in chemistry

1 answer:

7 0

Because chemistry is a new science , a lot of new information that is hard to understand for most students. If one doesn't study enough or put the work in to understand all the new concepts and such , it's hard to pass the class :(

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What is the volume of 2.5 moles of nitrogen gas (N2)<br>at standard temperature and pressure (STP)?

gregori [183]

Answer:

1 mole of gas = 22.4L

2.5 moles of gas takes up = ( 22.4 L/ 1 mole ) x 2.5 mole

= 56 L

Explanation:

Please mark brainliest and have a great day!

8 0

4 years ago

How many potassium atoms are present in 0.01456 g of potassium??

leva [86]

Its going to be 2.81 x 1023 atoms

8 0

3 years ago

A solid and a liquid are shaken together in a test tube to produce a clear blue liquid. Which of the following best describes th

harkovskaia [24]

<span>the behavior of the above pair of substances</span> is soluble

6 0

3 years ago

A sample of argon initially has a volume of 5.0 L and the pressure is 2 atm. If the final temperature is 30° C, the final volume

jenyasd209 [6]

Volume of Argon V1 = 5.0 L
Pressure of Argon P1 = 2 atm
Final temperature T2 = 30 C = 30 + 273 = 303 K
Volume at final temperature V2= 6 L
Pressure at final temperature P2 = 8 atm
We know that (P1 x V1) / T1 = (P2 x V2) / T2
(2 x 5)/ T1 = (8 x 6)/ 303 => T1 = (10 x 303) / 48
Initial Temperature T1 = 3030 / 48 = 63.12
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4 0

3 years ago

A 0.75M solution of CH3OH is prepared in 0.500 kg of water. How many moles of CH3OH are needed?

4vir4ik [10]

Answer:

We need 0.375 mol of CH3OH to prepare the solution

Explanation:

For the problem they give us the following data:

Solution concentration 0,75 M

Mass of Solvent is 0,5Kg

knowing that the density of water is 1g / mL, we find the volume of water:

$d = \frac{g}{mL} \\\\ V= \frac{g}{d} = \frac{500g}{1 \frac{g}{mL} } = 500mL = 0,5 L$