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katen-ka-za [31]
4 years ago
12

Chemistry problems in picture lots of points if you can help me solve any of these :)

Chemistry
1 answer:
djyliett [7]4 years ago
6 0

Answer:

that is kinda blury... got a better pic?

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What is the mass in grams of one mole of many of any substance known as
OLEGan [10]
The molecular weight of the substance.
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3 years ago
A sample of gas originally at 25 C and 1.00 atm pressure in a 2.5 L container is allowed to expand until the pressure is 0.85 at
aivan3 [116]

Answer:

Final volumeof the gas = 2.84 L

Explanation:

The formular to be used here is the general gas equation. the formular is being used because it gives the relationship between the three gas parameters (volume, temperature and pressure) mentioned.

The general gas equation is given as;

\frac{P1V1}{T1} = \frac{P2V2}{T2}

where;

P1 = initial pressure

V1 = initial volume

T1 = initial temperature

P2 = Final pressure

V2 = Final volume

T2 = Final temperature

From the question,

P1 = 1.00 atm

P2 = 0.85atm

T1 = 25C + 273 = 298K (Converting to kelvin)

T2 = 15C + 273 = 288K (Converting to kelvin)

V1 = 2.5L

V2 = ?

from the equation, making V2 subject of formula we have;

V2 = \frac{T2P1V1}{T1P2}

V2 = (1*2.5*288)/(298*0.85) = 2.84 L.

5 0
4 years ago
I’m so lost please help
ExtremeBDS [4]

C=4

D=-19

Explanation:

2exp-25/5exp-7= 4exp-19

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How many moles of copper are equivalent to 3.44 × 1023 atoms of copper?
nexus9112 [7]

3.44x10^23 divided by 6.02x10^23 equals 0.571 mol Cu.

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Solve A=h/2(b1 + b2) for h. Is this like the one before? We are a bit confused. ...?
natulia [17]
Do the total opposite operations until u get to H by itself

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