A. When two chemicals mix their temperature rise: Exothermic
b. A solid burns brightly and releases heat, light and sound: Exothermic
c. When two chemicals are mixed their temperature drops: Endothermic
d. Two chemicals will only react if you heat them continually: Endothermic
e. Plants take in light energy for photosynthesis: Endothermic

I hope this helps :)

4 0

4 years ago

2) If I have an unknown quantity (# of moles) of gas at a pressure of 32 atm, a volume of 70 L, and a temperature of 25˚C. How m

astra-53 [7]

Answer:

91.5 mol

Explanation:

Volume of gas = 70 L

Temperature = 25°C

Pressure = 32 atm

Moles of gas = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K

T = temperature in kelvin

Now we will convert the temperature.

25+273.15 = 298.15 K

By putting values,

32 atm × 70 L = n ×0.0821 atm.L /mol.K × 298.15 K

2240 atm.L = n ×24.48 atm.L /mol

n = 2240 atm.L / 24.48 atm.L /mol

n = 91.5 mol

3 0

3 years ago

What is the humidity if the dry-bulb is 10℃ and the wet-bulb is 6℃ (My subject is not really chemistry I had no other option)

Delicious77 [7]

Answer:

hi it is 16c

Explanation:

6 0

3 years ago