A compound has an empirical formula of CHN. What is the molecular formula, if it's molar mass is 135.13 g/mol? (C=12.01 amu, H=1.008 amu, N = 14.01)

When pellets of NaOH (s) are added to a flask of water, it is observed that the temperature of the water increases as the pellets dissolve. Which of the following claims about the observed dissolution of NaOH (s) in water is most accurate?

Sometimes genes, for no known reason (s), change their form in a process called spontaneous malformation spontaneous acceleration spontaneous combustion spontaneous mutation

Copper is now extracted from ores containing a low percentage of copper compounds suggest two reasons why?

What atomic component contributes to many of the trends of elements

The difference in the color and consistency of different types of crayons and pastels is due to: A. the use of different binders. the use of liquid pigmentation. B. the fact that these media do not need a binding agent. C.

How is petrol separated from the mixture of hydrocarbons in crude oil?

The following chemical reaction takes place in aqueous solution: MgBr2 (aq) + 2KOH (aq) →Mg (OH) 2 (s) + 2KBr (aq) Write the net ionic equation for this reaction.

How many molecules are in 1.2 moles of H20?

Which of the following is diamagnetic? A) Sn B) Pb 2+ C) I D) N E) All are paramagnetic

Based on your observations in the lab, what do you think happens to the majority of water (not, ice) at the poles? at the equator?