There are two that seem correct to me but i would go with the first answer choice, a mole of cu atoms has the same number or atoms as a mole of he atoms.
Answer:
Energy level where all chemical reactions occur. The remaining electrons are 'core' electrons that do not react.
Explanation:
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Answer:
54.092%
Explanation:
molar mass of ca(oh)2 is 74.09268g/mol
convert grams Ca(oh)2 to moles
40.078+(15.9994+1.00794)
Answer:
Re=2094,76
Explanation:
For a fluid that circulates inside a straight circular pipe, the Reynolds number is given by:

where (using the international measurement system):
- ρ: density of the fluid [kg/m3]
- v: velocity of the fluid [m/s]
- D: diameter of the pipe through which the fluid circulates [m]
- μ: dynamic viscosity [Pa.s]
To solve the probelm, we just need to replace our data using <u>THE CORRECT UNITS</u> in the Reynolds number equation. So we have:
ρ=1051 kg/m3,
v=34,3 cm/s=0,343 m/s
D=2,15 cm = 0,0215 m
μ = 3,7 cp * 10^-3 Pa.s/1 cp = 3,7*10^-3 Pa.s
Replacing in the main equation:

So the Reynolds number is 2094,76 (note that the Reynolds number is a dimensionless quantity).