The Avogadro number represents the number of units in one mole of a chemical substance.
So to find the mole number of a chemical element, you divide its atom number of the Avogadro number which Na = 6.02*10^23 approx.
So n=N/Na (n=mole number, N=number of atoms, Na=Avogadro number)
n=1.0*10^15/6.02*10^23
n=1.6 * 10^-9
So 1.0*10^15 atoms of Sodium represent 1.6*10^-9 mol.
Hope this Helps! :)
Answer:
Explanation:
We are asked to find the volume of a substance.
We are given the density and the mass. The density of a substance is its mass per unit volume. The formula for calculating density is:
We know the density of the substance is 13.6 grams per cubic centimeter and the mass is 3.0 grams.
Substitute these values into the formula.
We are solving for the volume, so we must isolate the variable v. First, cross multiply. Multiply the first numerator by the second denominator, then multiply the first denominator by the second numerator.
Multiply on the right side of the equation.
The variable is being multiplied by 13.6 grams per cubic centimeters. The inverse operation of multiplication is division, so we divide both sides of the equation by 13.6 g/cm².
The units of grams cancel.
The original measurement of density has 3 significant figures and the measurement of mass has 2. Our answer must have the least number of sig figs, which is 2. For the number we found, that is the hundredth place. The 0 in the thousandth place tells us to leave the 2 in the hundredth place.
The volume of the substance is approximately <u>0.22 cubic centimeters.</u>
Foods that are high in carbohydrates have the least impact on slowing the body's absorption rate of alcohol.
What is human digestive system?
The digestive system of the human body is made up of the gastrointestinal tract and additional digestive organs (the tongue, salivary glands, pancreas, liver, and gallbladder). In order for food to be absorbed and incorporated into the body, it must first be broken down into smaller and smaller components during digestion. Cephalic, gastric, and intestine phases make up the three
Our body will immediately start absorbing alcohol when you are hungry. However, because alcohol is not soluble in fat, fatty foods effectively create a barrier through which it cannot easily travel. This will greatly slow down alcohol absorption.
Hence, foods that are high in carbohydrates have the least impact on slowing the body's absorption rate of alcohol.
To know more about digestive system from the given link
brainly.com/question/18639907
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Answer:
Q1) B
Q2) C
Kelvin is the SI unit of temperature.
