Which of the following elements is a noble gas?

a. rb

b. mn

c. cl

d. kr

A balloon is floating around outside. The temperature outside is - 19 Celsius, and the air pressure is 0.800 ATM. Your neighbor, who released the balloon, tell you that he filled it with 4.50 moles of gas.

You are traveling to visit your cousin in Australia for three days. But she hasn't told you what to pack.

Ow many grams of NaOH would be needed to react with 199 g of HCl?

You are given two beakers A and B and China rose as an indicator. Beaker A has 20ml of magnesium hydroxIde and 100ml of water. and beaker B has 50ml of magnesium hydroxide and 100ml of water. When these solutions are tested with China rose, a.

A newly discovered element, Y, has two naturally occurring isotopes. 87.8 percent of the sample is an isotope with a mass of 267.8 u, and 12.2 percent of the sample is an isotope with a mass of 269.9 u.

Formula for sulfur tetrafluoride

Geologists think that parts of the Appalachian Mountains formed originally from sediments accumulating in shallow swamps. The weight of the sediments caused the area beneath them to sink, allowing more sediments to accumulate.

What volume would 1.5 mol of nitrogen gas occupy at standard temperature and pressure?

State three reason why do you think air is a mixture and water a compound?

Defined the following convection