1) calculate the number of mole 155.7 l of co2 gas at stp (1 mol=22.4 l of gas at stp
2) calculate the number of moles 9.25*10^26 molecules of cacl2 (1 mol= 6.022*10^23 molecules)
, i need the answers asap : (

What is the smallest integer n such that n\sqrt{2} is greater than 20

Question 5 spring semester final exam math evaluate

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.