Question

question 11 of 29
how many atoms of calcium? (1.4 points)
extra content
ca(c₂h₃o₂)₂
a. 1
b. 2
c. 3
d. 4

question 12 of 29
how many atoms of sodium? (1.4 points)
extra content
3nahco₃
a. 3
b. 6
c. 9
d. 12

question 13 of 29
how many total atoms? (1.4 points)
extra content
3n₄o₁₀
a. 12
b. 22
c. 32
d. 42

Explanation:

Question 11

Step1: Analyze the formula

In the formula \(Ca(C_2H_3O_2)_2\), the coefficient of \(Ca\) is \(1\).

Step1: Analyze the formula

In the formula \(3NaHCO_3\), for each \(NaHCO_3\) unit, there is \(1\) \(Na\) atom. Since the coefficient is \(3\), the number of \(Na\) atoms is \(3\times1 = 3\).

Step1: Calculate atoms in one \(N_4O_{10}\) unit

In \(N_4O_{10}\), the number of \(N\) atoms is \(4\) and the number of \(O\) atoms is \(10\). So, one \(N_4O_{10}\) unit has \(4 + 10=14\) atoms.

Step2: Multiply by the coefficient

Since the coefficient is \(3\), the total number of atoms is \(3\times14 = 42\).

Answer:

A. 1

Question 12