The atomic and mass numbers for four different atoms are given below. Which two are isotopes?

Atom Atomic# Mass#

W 50 117

X 50 119

Y 51 119

Z 52 117

1. How many moles are 1.50 x 10+25 atoms of phosphorous? Show work!

Which of the following is an important reason to cite a source? A. It lets others decide if your source is reliable. B. It makes sure that others will agree with the information. C. It lets you copy or paraphrase large sections of the source. D.

Rank in increasing polarity the carbon-nitrogen single, double, and triple bonds. not enough information to compare. triple < double < single all have the same polarity. single < double < triple

Which energy change occurs during boiling? Some heat energy of the substance is lost Heat energy of the substance remains the same Most heat energy of the substance is lost. Heat energy is adsorbed by the substance.

Ka for hydrofluoric acid, HF, is 7.20E-4. Ka for phenol (a weak acid), C6H5OH, is 1.00E-10. Ka for acetylsalicylic acid (aspirin), HC9H7O4, is 3.00E-4. What is the formula for the strongest conjugate base?

What's the Compound for CO?

How to measure a bag of flour

If the pH of a wine is too high, say, 4.0 or above, the wine becomes unstable and has a flat taste. (a) A certain California red wine has a pH of 3.5, and a certain Italian white wine has a pH of 2.9.

Sodium hydroxide reacts with carbon dioxide as follows: which is the limiting reactant when 1.85 mol naoh and 1.

How many molecules in n2o2 molar mass is 92.02g