Which of the following is the greatest mass

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.