Question 8 of 11 > A boy with pneumonia has lungs with a volume of 1.7 L that fill with 0.070 mol of air when he...
mment Score: 63.3% Resources Hint Check Answer cion 22 of 24 > A boy with pneumonia has lungs with a volume of 1.8 L that fill with 0.075 mol of air when he inhales. When he exhales, his lung volume decreases to 1.4 L. Enter the number of moles of gas that remain in his lungs after he exhales. Assume constant temperature and pressure. mol
1) A container expanded to 4.46 L when it reached 331 K. If its initial volume was 4.00 L, what was its initial temperature? A. 0.0539 K B. 529 K C. 9.67 K D. 297 K 2) Exactly 7.00 L of air is warmed from 14.0 K to STP. If pressure does not change, what is the new volume? A. 137 L B. 13.7 L C. 359 L D. 0.359 L 3)...
Question 11 of 15 > The table lists the specific heat values of several substances. An unknown substance has a mass of 28.9 8. The temperature of the substance increases by 20.7°C when 55 cal of heat is added to the substance. Substance lead silver copper iron aluminum water Specific heat (cal/g °C) 0.031 0.058 0.092 0.107 0.216 1.000 What is the most likely identity of the substance? iron water lead OOOOOO aluminum silver copper Question 12 of 15 >...
A chemistry teacher needs to make 2.30 L of a potassium chloride solution for an experimen The concentration of the required solution is 3.10 M. How many grams of KCI will she need to use? 0 7.13 g KCI 0 231 g KCI O 532 g KCI 0.0956 g KCI What is the equation for the ion product constant of water at 25 °C? Kw [H,0+][OH-] [H,O] = 1.00 x 10-14 Kw [H,0+1 [OH-] = 1.00 x 10-14 Kw =...