A rock that contains enough of a p a r t i c u l a substance to make it worth mining is called a

If it takes 450 J of energy to melt 5 g of a substance, how many joules would be needed to melt 15 g? A. 9000 J B. 6750 J C. 2250 J D. 1350 J

What's the easiest way to find balance in a chemical equation? a. Calculus b. Multiply the number of molecules by two, then divide by the number of atoms c. Trial and error

If 112 g of iron (Fe) combines with 24 g of oxygen (o2) how much iron oxide is formed

Name the following species: (a) (IO) - 2, (b) (HCrO4) - 1, and (c) (HC2O4) - 1

The greatest amount of energy released per gram of reactants occurs during a (1) redox reaction (2) fission reaction (3) substitution reaction (4) neutralization reaction

Initially you dissolved all, or most, of the p-aminobenzoic acid in ethanol. then you slowly added sulfuric acid. as you did this, a large amount of white solid formed. during the course of the reaction, that white solid dissolved.

How do you know if a chemical reaction has occurred?

Why must a container or system be closed for equilibrium to be established?

What is the bond angle between the hydrogen atoms in an ammonia (NH₃) molecule?

In Experiment 1, the density of pure ethanol was found to be:Question 1 options:less than 0.793 g/mL. 0.793 g/mL. 0.999 g/mL. greater than 0.999 g/mL.