Answer:
2. d
3. i
4. e
5. j
6. g
7. a
8. f
9. b
Explanation:
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Sun. The sun is the producer because it is producing energy and sunlight for the organisms living on Earth
Answer:
Assuming the reaction you are referring to is the following:
AgNO3 + Cu --> Cu(NO3)2 + Ag
First, we should balance the reaction:
2 AgNO3 + Cu --> Cu(NO3)2 + 2 Ag
Now we carry out dimensional analysis, taking into account the molar ratios of different species as given in the balanced reaction and molar masses (which we can look up in the periodic table).
We begin with what we know, which is that we have 16.0 g Cu reacting and work our way toward the quantity that we would like to calculate, namely moles of Ag.
16.0 g Cu x 1 mol Cu x 2 mol Ag = 0.504 mol Ag
63.5 g Cu 1 mol Cu
The answer is B: Sound waves cause parts of the ear to vibrate until the waves are converted to electrical signals, which are sent to the brain.
Answer:
5. gains two electrons.
Explanation:
In order to determine the most stable monoatomic ion of oxygen, we need to consider the octet rule: atoms will gain, lose or share electrons to complete their valence shell with 8 electrons.
Oxygen is in the Group 16 in the Periodic Table, so it has 6 valence electrons. Therefore, it will gain two electrons to have the electron configuration of the closest noble gas.
