Answer:
Explanation:
AI-generated answer
To calculate the number of molecules in 4g of CaCl2, we first need to determine the number of moles of CaCl2 in 4g using the formula:
Given that the molar mass of CaCl2 is 110.98 g/mol, we can substitute the values into the formula:
Next, we convert moles to molecules using Avogadro's number (6.022 x 10^23 molecules/mol). The formula is:
Substitute the value of moles into the formula:
Therefore, there are approximately 2.171 x 10^22 molecules of CaCl2 in 4g. So, the correct answer is:
O 2.170 x 10^22 molecules
