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Oksana_A [137]
3 years ago
6

Two substances each have a temperature of 23 degrees Celcius. After they are combined the temperature rises to 27 degrees Celciu

s. What evidence proves a chemical reaction occurred?
Chemistry
1 answer:
Sidana [21]3 years ago
4 0

well it has cause a thermal reaction which causes the temperature to rise so by mixing those together we get the reaction you have the temp. rose  

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Using the same sample of gas (P1 = 565 torr , T1 = 27 ∘C ), we wish to change the pressure to 5650 torr with no accompanying cha
Stels [109]

Answer:

2726.85 °C

Explanation:

Given data:

Initial pressure = 565 torr

Initial temperature = 27°C

Final temperature = ?

Final pressure = 5650 torr

Solution:

Initial temperature = 27°C (27+273 = 300 K)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

T₂  = P₂T₁ /P₁

T₂  = 5650 torr × 300 K / 565 torr

T₂  = 1695000 torr. K /565 torr

T₂ = 3000 K

Kelvin to degree Celsius:

3000 K - 273.15 = 2726.85 °C

4 0
3 years ago
The greater the mass of an object
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6 0
3 years ago
How many electrons are in an ion of calcium (Ca2+)?<br> A. 2<br> B. 18<br> C. 0<br> D. 22
Elanso [62]
B 18 is the answer ......
7 0
3 years ago
Potassium permanganate as a symbol
Alexxx [7]

Answer: KMnO4-

Explanation:

You're looking at one potassium plus a polyatomic ion.

So K plus MnO4, equals:

KMnO4-

It also has a molar mass of 158.04 g/mol, I don't know if you need that, but I thought it would be nice to include it.

7 0
3 years ago
HELP ME QUICK
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Quick answer: Exothermic reactions mean that heat has escaped the system. The answer is A. Heat is released.
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4 years ago
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