Three samples of iron with masses of 1.12 grams, 1.8 grams, and 1.562 grams were mixed together. The combined mass of the three samples,
expressed to the correct number of significant figures is

A) 4.4 grams
B) 4.48 grams
C) 4.5 grams

Need answer quickly

Which of the following pressures is equal to 760 mm hg? 2.0 atm 101.3 pa 101,300 kpa 101,300 pa

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.