How many moles of NaOH are present in 65.00 g of NaOH(s)? *
1 answer:
Answer:
<h2>The answer is option B</h2>Explanation:
To find the number of moles we must first find the molar mass of the compound after that we use the formula
where
n is the number of moles
M is the molar mass
m is the mass
M(Na) = 23 , M(O) = 16 , M(H) = 1
Molar mass ( NaOH ) = 23+ 16 + 1
= 40 g/mol
mass = 65 g
Substitute the values into the above formula and solve
That's
We have the final answer as
<h3>1.625 moles </h3>Hope this helps you
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Answer:
The pair of arrows which represents the relationship of speeds of the two cars is;
The second option as shown in the attached drawing
Explanation:
The given parameters are;
The reading on the speedometer of one car = 20 m/s
The reading on the speedometer of the other car = 72 km/h = 20 m/s
The blue arrow = 20 m/s
Therefore, given that the speeds of both cars are equal (20 m/s = 72 km/h = 20 m/s), the pair of arrows that represent the relationship of speeds of the two cars is two equal length blue arrows which is the second option
The attached diagram showing the pair of arrows that represents the relationship of speeds of the two cars is drawn using Microsoft Visio.
