Why is sima layer found beneath the sial layer?.

8.98 dm3 of hydrogen gas is collected at 38.8 °C. Find the volume the gas will occup at - 39.9 °C if the pressure remains constant.

What is the temperature of 0.750 mol of a gas stored in a 6,850 mL cylinder at 2.21 atm? Use PV = nRT and R-0.0821 Leatm molok: 2.95 K 5.24 K 138 K 246 K

A solution of H2SO4 (aq) with a molal concentration of 5.74 m has a density of 1.238 g/mL. What is the molar concentration of this solution?

Allison needs 18 liters of a 5% saline solution. She has a 1% solution and a 10% solution available. How many liters of the 1% solution and how many liters of the 10% solution should she mix to make the 5% solution?

Many sponges can reproduce asexually. Ladybugs, on the other hand, reproduce sexually. When small bits of a sponge are broken off-often by currents or by predators--they can float to new regions and regenerate as new sponges.

Which of these is a property of bases? They produce hydrogen gas when reacted with metals. They turn litmus paper blue. They feel sticky. They taste sour.

After Pangaea broke up, North America became part of what?

What the different betwen observe and reference

How many moles are in 12.5 g of H2O

How do the atomic number and the number of protons relate to one another? The atomic number tells us the number of protons The atomic number is protons + neutrons They do not Electron Cloud