Question

You have 1.145 g of NaCl. You need more, so you weigh out an additional 1.20 g of NaCl. How much NaCl do you have?

A) 2.345 g
B) 2.35 g
C) 2.34 g
D) 2.3 g

Answer 1

After adding the initial 1.145 g of NaCl to the additional 1.20 g of NaCl, you have a total of 2.345 g of NaCl, which rounds to 2.35 g(option B).

Step-by-step explanation:

If you initially have 1.145 g of NaCl and then weigh out an additional 1.20 g of NaCl, you would simply add these two amounts together to find the total mass of NaCl you have. The calculation is as follows:

• 1.145 g of NaCl
• + 1.20 g of NaCl
• = 2.345 g of NaCl

Therefore, the total amount of NaCl you would have is 2.345 g. Rounding to two decimal places as the options suggest, the answer is 2.35 g, which corresponds to option B) 2.35 g.