The table shows the speed of sound in four substances. Substance. Speed (meters/second)
air. 330
water. 1,498
steel. 5,000
copper. 6,420

Based on this information, which substance has the lowest density?
O A water
O B. steel
C. copper
O D. air​

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

How many atoms are in 2 moles of phosphorus