After 252 days, a 12.0-g sample of the radioisotope scandium-46 contains only 1.5 g of the isotope. what is the half-life of scandium-46

What type of friction acts on a turning wheel or tire?

Element X has an electron configuration of 2-8-3. This element will combine with the phosphate ion to form a compound with the formula

Why are the elements 57 through 71 and 89 through 102, found separately at the bottom of the table?

What are the highly reactive elements in the periodic table?

How many molecules are in 1.76 moles of oxygen

Which of the following statements is true of enzymes? A. they change shape after a reaction B. They don't provide an active site for substrates to bind in a reaction C. They're unusable after a reaction D.

How many moles of NaCl are present in 530 ml of a 1.52m NaCl solution

How much can 97 go in to 15

What is the predicted products for Ag+CuSO4

What happens to the carbon atoms lost during respiration?