1. Calculate the mass of the product, if you started with 4 g of Zn and 3 g of H2CO3. Zn + H2CO3
ZnCO2 + H2 * I’ll cash app for the right answer plus explanation”

6.07 g.

Explanation:

Hello!

In this case, given the chemical reaction:

We first need to compute the moles of each reactant considering their molar masses:

Now, compute the mass of zinc carbonate yielded by each reactant in order to pick out the correct limiting reactant:

Thus, we conclude carbonic acid is the limiting reactant as it produces the fewest grams of product and therefore the yielded mass of zinc carbonate product 6.07 g.

Best regards.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.