This element is often used to block out dangerous radiation.

a. lead

b. carbon-12

c. uranium-236

d. uranium-238

Find the weighted average of these values. Col1 Value 5.00 6.00 7.00Col2 Weight 75.0 % 15.0 % 10.0 %

Valency of Chlorine is 1. Why?

Consider the second-order decomposition of nitroysl chloride: 2NOCl (g) → 2NO (g) + Cl2 (g) At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 80 torr to decay to 23.7 torr?

if you have 0.5 grams of CaCl2 dissolved to make 15mL of solution, what is the molarity of the solution?

How is a waveform shown on the oscilloscope different from a compressional wave?

Insulator in a sentence, with science.

Aqueous hydrobromic acid reacts with solid sodium hydroxide to produce aqueous sodium bromide and liquid water.

Is calcium fluoride a pure substance, element, compound, or mixture?

A fish company delivers 22 kg of salmon, 5.5 kg of crab and 3.48 kg of oysters to your seafood restaurant. What is the mass, in kilograms of the seafood? What is the total number of pounds?

If 38.7 grams of lithium chlorate decomposes, how many grams of oxygen gas can be produced?