Which of the following could NOT be the chemical formula of an element? A . T
B .TB
C) Tb
D. t

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled