Answer: D) 36.0 km/hr, downstream
Explanation:
For downstream motion of the boat, the actual velocity of the boat is the sum of velocity of the water current and the velocity of the boat due to pushed by wind.
Velocity of water current, v = 15 km/h
Velocity of the boat going downstream, u = 21 km/h
Actual velocity of the boat = v'
v' = v + u
⇒v' = 15 km/h + 21 km/h
⇒u = 21 km/h +15 km/h = 36.0 km/h downstream
Thus, the correct answer is option D.
The list that only includes terms that describe Cesium (Cs) is option (b) i.e atom, element, pure substance .
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What do you mean by the term atom , element, pure substance ?
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Atom, is the smallest unit of matter that has the characteristic properties of a chemical element .The atom is the basic building block of chemistry.
Element is a pure substance consisting of only one type of atom which all have the same numbers of protons. Elements are chemically the simplest substances and hence cannot be broken down using chemical reactions.
Hence ,in the list that only includes terms that describe Cesium (Cs) is option (b) i.e atom, element, pure substance .
Learn more about atom and element, here:
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1.5x10^24 over 1 multiplied by 1 mol over 342g C12H22O11 multiplied by 6.02x10^23 over 1 mol
Multiply all across the top then divide by bottom
2.64 Mol
Answer: It will take for the concentration of A to decrease from 0.900 M to 0.210 M is 28.75 s
Explanation:
Zero order reaction : A reaction is said to be of zero order if the rate is independent of the concentration of the reactants, that means the rate is directly proportional to the zeroth power of the concentration of the reactants.
Expression for the zero order kinetics:
where [A] = concentration left after time t = 0.210 M
= initial concentration = 0.900 M
k= rate constant =
t = time for reaction = ?
Thus it will take for the concentration of A to decrease from 0.900 M to 0.210 M is 28.75 s
635ml will yield 1m of hcl
xml will yield 10m of hcl
that means 6250ml will yield 10m of hcl