Consider the combustion of 6.0 g of ethane (CH). What volume of ethane 1 point will be formed at STP?

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Can someone me with 1 to 4 plz. fast

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.