I would say B.
Explanation: Peer review improves the quality of research papers.
1Hz = 1 cycle per second
19 cycles / .5 seconds = 38Hz
C is the correct answer for this question. since it is a physical change
Answer:
4.567 ltr
Explanation:
both are gases
so
N2 +Br2 =NBr3
balancing
N2 +3B2 = 2 NBr3
now
3 litr of B2 gives 2 liter of NBr3
6.85 litr of B2 gives 2/3 *6.85 litr NBr3 = 4.567ltr
0.050 litres of the water will be required to make a 3.91 M solution with 0.196 moles in it.
Explanation:
Data given:
moles of Cd
= 0.196 Moles
Molarity of the solution = 3.91 M
Volume in litres =?
molarity is calculated by the formula:
molarity = 
putting the values in the above formula and rearranging it for volume:
volume = 
volume = 
volume = 0.050 litres
0.050 litres of the water will be required to make a 3.91 M solution with 0.196 moles in it.
Molarity is the number of moles present in a given volume of solution which is given in litres. It is the measurement of the concentration of particular solute in a solution.