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Zielflug [23.3K]
3 years ago
11

HELP ASAP!!!!

Chemistry
1 answer:
never [62]3 years ago
7 0

Answer:

what are the answer choices??

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If the volume of a gas at 0.5 atm changes from 150 mL to 75 mL, what is the new pressure?
nalin [4]

Answer:

<h2>1 atm </h2>

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

P_1V_1 = P_2V_2

Since we're finding the new pressure

P_2 =  \frac{P_1V_1}{V_2}  \\

We have

P_2 =  \frac{0.5 \times 150}{75}  =  \frac{75}{75}  = 1 \\

We have the final answer as

<h3>1 atm </h3>

Hope this helps you

3 0
3 years ago
Linolenic acid (C18H30O2 - M.W. = 278.42 g/mol) reacts with hydrogen gas according to the equation: C18H30O2 + 3H2 (g) → C18H36O
Ludmilka [50]

Answer:

2.53 L is the volume of H₂ needed

Explanation:

The reaction is: C₁₈H₃₀O₂ + 3H₂ → C₁₈H₃₆O₂

By the way we can say, that 1 mol of linolenic acid reacts with 3 moles of oxygen in order to produce, 1 mol of stearic acid.

By stoichiometry, ratio is 1:3

Let's convert the mass of the linolenic acid to moles:

10.5 g . 1 mol / 278.42 g  = 0.0377 moles

We apply a rule of three:

1 mol of linolenic acid needs 3 moles of H₂ to react

Then, 0.0377 moles will react with (0.0377 . 3 )/1 = 0.113 moles of hydrogen

We apply the Ideal Gases Law to find out the volume (condition of measure are STP) → P . V = n . R . T → V = ( n . R .T ) / P

V = (0.113 mol . 0.082 L.atm/mol.K . 273.15K) 1 atm = 2.53 L

4 0
3 years ago
A(n) ____ is a substance that produces H+ ions in a water solution.
neonofarm [45]

Answer:

Electron

Explanation:

Hydrogen ion, is strictly, the nucleus of a hydrogen atom and can be separated from its accompanying electron.

7 0
4 years ago
Read 2 more answers
1. Which type of intermolecular attractive force operates between all molecules?
natita [175]

Answer:

1) C

2)A

3)D

Explanation:

London forces are common to all molecules, it results from momentary shifts in electron distribution in molecules. When molecules possess a permanent dipole, dipole-dipole interaction is the dominant intermolecular force. However, for compounds in which hydrogen is bonded to highly electronegative element, hydrogen bonding is important.

4 0
3 years ago
Read 2 more answers
All of the following are evidence of chemical changes EXCEPT:
s344n2d4d5 [400]

Answer:

d) grass growing

Explanation:

i believe because everything else has something happening where it wasn't the same as before but grass is still the same color texture but its just longer

7 0
3 years ago
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