A 2.00g sample of unknown hydrocarbon is found to contain 1.50g carbon and 0.50g hydrogen. What is the compound's percent composition

A6.10 m nacl can be made by adding [x]g of nacl to a container and making the volume of water up to the 1.00 l line

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)