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Akimi4 [234]
3 years ago
8

Change is still the same 16. A substance that undergoes a substance after the change.

Chemistry
1 answer:
V125BC [204]3 years ago
3 0

Answer:

When substances undergo chemical change, the mass of the reactants will be the same as the mass of the products. Mass is converted when substances undergo chemical change but is not lost. Mass cannot be created or destroyed.

Explanation:

i hope this helps :)

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42.9 liters of hydrogen are collected over water at 76.0 °C and has a pressure of 294 kPa. What would the pressure (in kPa) of t
BabaBlast [244]

Answer:

494.1 kPa

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (kPa)

P2 = final pressure (kPa)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question,

P1 = 294 kPa

P2 = ?

V1 = 42.9 liters

V2 = 22.8 liters

T1 = 76.0°C = 76 + 273 = 349K

T2 = 38.7°C = 38.7 + 273 = 311.7K

294 × 42.9/349 = P2 × 22.8/311.7

12612.6/349 = 22.8 P2/311.7

36.14 = 22.8P2/311.7

Cross multiply

36.14 × 311.7 = 22.8P2

11264.605 = 22.8P2

P2 = 11264.605 ÷ 22.8

P2 = 494.1 kPa

3 0
3 years ago
My teacher never taught me how to do this helpppp!!!!!!!
djverab [1.8K]
Just search up how much the weight is equal to another, then multiply it, thats what i do lol sorry if im no help
6 0
3 years ago
20 POINTS!! please helps me with this word bank!! due today!! you can use a word more than once please help
Bogdan [553]

Answer:

zoom in please i cant see

Explanation:

7 0
3 years ago
Read 2 more answers
PLS HELP ME I HAVE TILL 12
MariettaO [177]

Answer:

alright bud lets see hmm.... the answer is a. 90.5kpa

Explanation:

92.3 kPa - 1.82 kPa = 90.5 kPa

keep up your hope also corrected me if a am wrong in anyway! :)

3 0
3 years ago
Using tongs place the 250 mL beaker on hot plate
LenKa [72]

Answer:

just use the tongs and put it on a plate

Explanation:

4 0
2 years ago
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