Estimate these answers by rounding off. a) 1 899: 21
b) 3010 x 299
c) 2 895 x 110
d) 99 020 = 50
e) 200 000 = 25
f) 4 020 X 198​

Select the correct answer. given: 2libr + ba → babr2 + 2li in this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced? a. 1.18 mol b. 2.37 mol c. 4.73 mol d. 16.4 mol e. 32.9 mol

Classify this reaction: 2al+n2-> aln.

Which of the following are correct values for the ideal gas laws constant r