3 years ago

A substance that speeds up the rate of a chemical reaction is called

2 answers:

NeTakaya3 years ago

8 0

I'm not going toblie I'm stuck with A and B. But to me my gut says A

6 0

A substance that speeds up the rate of a chemical reaction is called a catalyst. As a catalyst speeds up the reaction, as an enzyme does. <span />

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aliya0001 [1]

I’m sorry if I wasted your time but I think it’s alkali metals but I’m
Not sure

5 0

3 years ago

Rus_ich [418]

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7 0

3 years ago

mamaluj [8]

I think the answer is A. 28 because you add 27 + 1 = 28 and add the 13AL and makes 2813AL
I Hope Its Helps

6 0

4 years ago

Mekhanik [1.2K]

Answer:

138g

Explanation:

270g-132= 138g

4 0

3 years ago

gladu [14]

The reaction corresponds to the combustion of propane (C3H8). The balanced reaction is:

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)

The reaction enthalpy is given as:

ΔHrxn = ∑nΔH°f(products) - ∑ nΔH°f(reactants)

= [3ΔH°f(CO2(g)) + 4ΔH°f(H2O(g)] - [1ΔH°f(C3H8(g)) + 5ΔH°f(O2(g)]

= [3(-393.5) + 4(-241.8)] - [-103.9 + 5(0)] = -2043.8 kJ

The enthalpy for the combustion of propane is -2044 kJ

4 0

3 years ago