Methane (CH 4 ) , ammonia (NH 3 ) , and oxygen () can reaci to form hydrogen cyanide (HCN) and water (H 2 O) according to this equation 2CH 4 +2NH 3 +3O 2 2HCN+6H 2 O How many grams of methane are required to produce 2 moles ? Use your periodic table to help you. Please show work

0.09 moles of sodium sulfate in 12 ml of solution

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?