5 Lucy heats some calcium carbonate. She weighs the reaction vessel at the start of the reaction and again after it has been heated. Calcium carbonate decomposes into calcium oxide and carbon dioxide.

Look at Lucy's results:
Mass of calcium carbonate before heating = 2.00 g

Mass of calcium oxide left after heating = 1.129

Calculate the mass of carbon dioxide that was released during the
decomposition. Show all your workings.

it is a good conductor

explanation:

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.