This problem is asking for the consumption of silver ions when silver nitrate is reacted with copper. In such a case, since no masses are given, we can use the following from similar problems:
Mass of empty beaker: 110.000 g
Mass of beaker with silver nitrate (after all additions) and copper: 331.634 g.
Mass of beaker with silver: 113.395 g.
This means we can write the following chemical equation:
And thus calculate the mass of silver nitrate that will produce the following mass of silver:
Next, we use the 2:2 mole ratio of silver to silver nitrate (silver ions source):
The step will be defined for the given mass of available silver nitrate which will be compared to 5.35 g (consumed mass) to see if they are the same (all consumed) or different (partial consumption).
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Answer:
to watered our source of food
the "PLANTS & TREES"
The law of supply states, things remaining equal, an increase in price results in an increase in quantity supplied. The direct relation which is between the price and quantity.
Therefore, when the price of wood increases, then the producers increases the quantity which is produced as they are willing to sell more at a higher price. Each group might respond to the change in price in that, the law of demand states that all things are equal.
A decrease in a quantity leads to an increase in price which is demanded. The existence in an inverse relation which is between price and quantity.
When the demand for good increases the consumer demand decreases.
Well, figures for efficiency vary a lot, but according to Bicycling Science it’s lubrication that matters most – lubing a dry chain can add 5% to the efficiency.
More interestingly (and I hadn’t read this bit in the book before) it varys a lot depending on gear ratio – bottom gear (22-28) is 99% efficient, top gear (42-11) is 88%. That’s a big difference
The question is in complete, the complete question is:
Which element has an outer electron configuration of s
2
p4
?
(A) Ca (B) Cr (C) Ge (D) Se
Answer:
(D) Se
Explanation:
The outer electronic configuration of an atom reflects the group to which it belongs in the periodic table. Each group has its unique outermost electron configuration and number of electrons found in the outermost shell of the atoms of elements in the group.
s
2
p4 is the unique outermost electron configuration of group 16 elements. Group 16 elements have six electrons in their outermost shell. If we consider the options, only Se is a member of group 16. Hence it is only Se that has the outermost electron configuration s
2
p4
.
