The concentration of sodium chloride in units of weight/volume percent is 3.93g/ml
Given that
3.93 (w/v) NaCl
Weight NaCl = 3.14g
Volume of water = 79.9mL
W/V is usually represented in g/mL, so no need to change anything
3.14g/79.9mL *100 = 3.93 g/mL (%)
One mole of NaCl contains 6.022 x 10 23 NaCl formula units.
• Use the mole quantity to count formulas by weighing them.
• Mass of a mole of particles = mass of 1 particle x 6.022 x 1023
• The mass of an atom in amu is numerically the same
as the mass of one mole of atoms of the element in grams.
• One atom of sulfur has a mass of 32.07 amu;
one mole of S atoms has a mass of 32.07 g.
Mass of 1 H atom: 1.008 amu x 1.661 x10-24 g/amu = 1.674 x10-24 g
Mass of 1 mole of H atoms:
1.674 x10-24g/H atom x 6.022 x1023H atoms = 1.008 g
Learn more about Weight / volume Percentage here
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Answer:
121.8bar
Explanation:
The partial pressure is the pressure a gas would exert if it were alone in the volume of the gas mixture;
Given parameters:
Total pressure = 2558psi
Partial pressure of carbon dioxide = 54.6bar
Unknown:
Partial pressure of nitrogen dioxide gas = ?
Solution:
Total pressure = partial pressure of carbon dioxide + partial pressure of nitrogen dioxide gas
Let us convert from psi to bar;
14.504psi = 1 bar
2558psi =
= 176.37bar
Now;
Partial pressure of nitrogen oxide = 176.37bar - 54.6bar = 121.8bar
Hydrazine and UDMH are both organic nonpolar liquids. Despite having different densities, their miscibility with each other allows the mixture of the two to homogenize. This means that the concentration of hydrazine and UDMH in all parts of the mixture are the same. This is also the reason why the mixture is called Aerozine 50 because the components are not distinguished but rather, stay well mixed in the system providing a stable set of properties unique to Aerozine 50.
<span>Answer: HgNO₃
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<span>Explanation:
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The empirical formula is the formula that shows the ratio of the atoms in its simplest form, this is using the smallest whole numbers.
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<span>The empirical formula may or may not be the same molecular formula.
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<span>In this case you are given the molecular formula Hg₂(NO₃)₂. Since, the ratio of the atoms of Hg, N, and O is 2: 2: 6, respectively, the same ratio is expressed if you divide by the greatest common factor (GCF).
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</span><span>The GCF of 2, 2, and 6 is 2. So, the ratios can be simplified to 1:1:3, meaning 1 mol of Hg, 1 mol of N, and 3 mol of O or HgNO₃.</span>