11. What is the mass number

of an element if its atom

contains 10 protons, 10

electron, and 12 neutrons?

A 12

C20

D. 32

The combustion reaction of c3h8o with o2 is represented by this balanced chemical equation. 2c3h8o + 9o2 6co2 + 8h2o when 3.00 g of c3h8o and 7.38 g of o2 are combined, how many moles of which reactant remain? (a) 0.006 mol o2 (b) 0.

Which represents the balanced equation for the beta minus emission of phosphorus-32? A) 32/15P - - - > 28/13 Al + 2/4 He B) 32/15P - - - > 32/14 Si + 0/-1 e C) 32/15P - - - > 32/16 S + 0/-1 e D) 32/15P - - - > 32/14 Si + 0/+1 e

Phase changes are examples of?

You weigh two different objects on the same scale in the same location on Earth. The weights are different. What must be different about the two objects?

How many grams of F2 will be produced by 1.95moles of CF4?

About how many elements are found on the periodic table? Question 8 options: 25 50 110 200

If JM = 5x - 6 and LM = 2x - 6, which expression represents JL?

5. The air rising cools as it reaches the top of which atmospheric layer? Troposphere Metrosphere Thermsphere none of the above

Looking at a net ionic equation how can i tell with reactant ions were oxidized

Why is it important to conserve both nonrenewable and renewable resources?