Product of CaCO3+H2SO4

CaCO₃ (aq)  +  H₂SO₄ (aq) →  H₂CO₃(aq)  +  CaSO₄(s) ↓

Explanation:

Aqueous solutions of CaCO₃ and H₂SO₄ can be mixed to form, two products, the calcium sulfate and carbonic acid.

In order the find the products, we can dissociate the reactants:

CaCO₃ → Ca²⁺  +  CO₃⁻²

H₂SO₄ → 2H⁺  +  SO₄⁻²

So, the protons will be catch by the carbonate and the calcium will form a precipitate with the sulfate. As Ca is an element from group 2, remember that sulfates can make precipitate with these elements (Ca, Ba and Mg)

Ca²⁺  +  SO₄⁻²  → CaSO₄

2H⁺  +  CO₃⁻²  ⇄  H₂CO₃   (Carbonic acid is a weak one, so in the reaction we add two arrows, because it is an equilibrium acid/base)

We add the phases to the main reaction:

CaCO₃ (aq)  +  H₂SO₄ (aq) →  H₂CO₃(aq)  +  CaSO₄(s) ↓

chemistry sucks a**

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.