You would know a decomposition reaction occurred if the reactants separated. For example from AB → A+B.

Now if you look at your options only 1 works out for that equation. Letter A.
From the compound K2CO3 it split up to K2O +CO2

It cannot be letter B because synthesis/combination occurred. The same goes for letter C. Letter D, single displacement occurred.

Again, the answer is A.

4 0

3 years ago

2. Can the frictional force in this experiment be ignored? Explain.

neonofarm [45]

Answer:

i dont know

Explanation:

i dont know

5 0

2 years ago

(Physical Science) What is the wavelength of light waves if their frequency is 5.0 x 10^14 Hz and the speed of light is 3 x 10^8

MaRussiya [10]

Explanation:

Wavelength = speed of light/frequency

Answer is

$6 \times {10}^{ - 7}$

4 0

2 years ago