The first choices are correct, because the second choices could happen by things other than light.
H3 in reaction: NH3 + H2O→NH4 + OH-
<span>The NH3 has gained an H - it is a base
true</span>
Answer:
An example of a weak base is ammonia. It does not contain hydroxide ions, but it reacts with water to produce ammonium ions and hydroxide ions. The position of equilibrium varies from base to base when a weak base reacts with water. The further to the left it is, the weaker the base.
Explanation:
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Answer:
Distance is 5.0 km and displacement is 0 km.
Explanation:
The diagram is shown below.
Distance is the total length that the truck covers along the complete journey. The truck moves from a stone quarry covering a length of 2.5 km and then again come back to the same point and thus covering another 2.5 km. Therefore, the total length covered by the truck is the sum of forward and backward paths which is equal to 5.0 km.
Now, displacement depends only on the initial and final position. It is given as the difference of final position and initial position. So, the truck starts from stone quarry and returns back to the same position. So, the initial position and final position is same. Therefore, the difference is 0 and hence displacement is zero.
<span>A. Most of the current will flow through one part of the circuit. </span>