Question 3 5 pts
Sylvia draws a model to represent the chemical reaction between two gases: methane
(CH) and oxygen (O2). In her model, she labels the carbon atoms "C" the hydrogen
atoms "H" and the oxygen atoms "O" as shown
Methane
Oxygen
Carbon Dioxide Water
OXO
0 0
в с
OXO
+
+
Part 1: Explain to Sylvia why her model does not follow the Law of Conservation of
Mass.
Part 2: What would be the best solution to fix Sylvia's model so that it follows the Law
of Conservation of Mass?
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12pt Paragraph
B 7
UA 2 Tv

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

The excretory system, need answers for all: )

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