<h3>
Answer:</h3>
= 3.384 × 10^23 atoms
<h3>
Explanation:</h3>
We are given 18.016 g of sulfur
We are required to determine the number of atoms of sulfur
We will use the following steps;
<h3>Step 1: Determine the number of moles of sulfur </h3>
Number of moles = Mass ÷ molar mass
Molar mass of sulfur = 32.065 g/mol
Therefore;
Number of moles = 18.016 g÷ 32.065 g/mol
= 0.562 moles
<h3>Step 2: Determine the number of atoms </h3>
Using the Avogadro's constant;
1 mole of an element = 6.022 × 10^23 atoms
Therefore;
For 0.562 moles;
= 0.562 moles × 6.022 × 10^23 atoms
= 3.384 × 10^23 atoms
Therefore; there are 3.384 × 10^23 atoms in 18.016 g of Sulfur.
Answer:
Explanation:
Given
Sugar = 56g
Tea = 78g
Required
Determine the mass percent of the sugar
First we need to calculate the total mass
The percentage mass is then calculated as thus
Substitute 56 and 134 for Sugar and Total mass respectively
Approximate
<em>Hence, the percentage mass of sugar is 42%</em>
According to <em>Prosen and Rossini, 1945</em>,
the standard heat of combustion of isooctane is -5461.3 kJ/mol. The negative sign is just to depict that there was a release of energy. Thus, to
produce 100 kJ energy,
100 kJ ÷ 5461.3 kJ/mol isooctane = 0.0183 moles isooctane.
0.0183 moles of isooctane must be burned.
I hope I was able to answer your question <span>J</span>
Surface runoff, its quite obvious in the picture
Answer:
trigonal pyramidal
Explanation:
In NF3, the nitrogen atom is sp3 hybridized. Now we must remember that according to the VSEPR theory, the number of electron pairs in the valence shell of the central atom in a molecule determines its shape.
Here, the nitrogen atom is the central atom and its outermost shell is surrounded by four electron pairs - one lone pair and three bond pairs. This means that it has a tetrahedral electron pair geometry.
However, due to the lone pair, the three fluorine atoms are arranged in a trigonal pyramidal geometry. Hence the correct shape of the molecule is trigonal pyramidal.