Answer:
0.1143M
Explanation:
if one 0.4moles=3.5l what about 1litre
The scenario that contains an exact number is 'A) You count 10 people in a room' (Option A).
<h3>What is the exact number?</h3>
An exact number can be considered a discrete variable because it does not involve a continuous range of values in a given measurement.
In conclusion, the scenario that contains an exact number is 'A) You count 10 people in a room' (Option A).
Learn more about discrete variables here:
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Answer : The moles of given compound is, 0.064 mole
Explanation : Given,
Mass of given compound = 40 g
Atomic mass of X = 50 amu
Atomic mass of Y = 45 amu
Atomic mass of Z = 10 amu
First we have to calculate the molar mass of given compound.
The given compound formula is, 
Molar mass of
= (5 × Atomic mass of X) + (7 × Atomic mass of Y) + (6 × Atomic mass of Z)
Molar mass of
= (5 × 50) + (7 × 45) + (6 × 10) = 625 g/mol
Now we have to calculate the moles of given compound.



Thus, the moles of given compound is, 0.064 mole