What two elements comprise most of a nebula? question 5 options: hydrogen and helium hydrogen and nitrogen oxygen and hydrogen carbon and hydrogen helium and lithium?

To which line of defense fo these belong?

What is the relationship between solution amount and molarity

Which observation indicates that rain is approaching? a. falling barometer, increased cloudiness, rising temperatures. b. rising barometer, decreased cloudiness, falling temperatures c. rising barometer, increased cloudiness, rising temperatures d.

How much mass would a mole of nitrogen molecules contain

The smllest particle of an element is the

In an open system, the vapor pressure is equal to the outside air pressure. T or F?

Could acetic acid be used in the esterification, instead of acetyl chloride? Why or why not?

9. In a sample of gas, what causes pressure? Answer in a completesentence.

Sodium (Na) reacts with chlorine gas (Cl2 ) to form sodium chloride (NaCl) as shown in the equation: 2Na + Cl2 → 2NaCl If 4 moles of chlorine gas react, how many moles of sodium will react?

What are transuranium elements properties?