A compound has a molar mass of 90. grams per mole and the empirical formula CH2O. What is the molecular formula of this compound?

(1) CH2O (3) C3H6O3

(2) C2H4O2 (4) C4H8O4

What is its molar heat of vaporization in kilojoules per mole if its vapor pressure at 20°C is 11.0 torr?

Jasmine has toast for breakfast every day. As soon as the toast pops out of the toaster, she puts butter on it. If she does it quickly, she can spread the butter over the toast with her knife, and it melts into the toast. Why does the butter melt? A.

N2+3H2 2NH3 what will happen if more nitrogen is added

What happens to the physical properties of gravel and sand when they are mixed?

Write a word equation for a reaction in which hydrogen acts as a reducing agent

True or false : A glacier can only form in an area where more snown falls than melts

An element belongs to group 9. what common name might be used to describe the group to which this element belongs?

Two liquids that are soluble in each other in any proportion are said to be what?

Which of the following is not a chemical reaction a) gas formation b) solid formation c) energy change d) state change

Which equation is derived from the combined gas law