Uestion 1
How many sulfur atoms are present in 26.1 grams of Al253?
Answer should have 3 significant figures adn in scientific notation

Consider the balanced equation below. n2h4 + 2h2o2 n2 + 4h2o what are the mole ratios of hydrazine (n2h4) to hydrogen peroxide (h2o2) and hydrazine to water? 1: 2 and 1: 4 1: 3 and 1: 4 1: 2 and 3: 5 1: 3 and 3: 5

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?