Under certain circumstances, carbon dioxide, co2(g), can be made to react with hydrogen gas, h2(g), to produce methane, ch4(g), and water vapor, h2o(g): co2(g)+4h2(g)→ch4(g)+2h2o(g)part a how many moles of methane are produced when 59.6 moles of carbon dioxide gas react with excess hydrogen gas? express your answer with the appropriate units. for example, write the unit moles as mol. part b how many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce 42.1 moles of water vapor? express your answer with the appropriate units. for example, write the unit moles as mol.

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

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