A compound is a substance that consists of 2 or more elements chemically combined in a fixed proportion.
Compounds can be broken down ijt0 simple substances by chemical means but, elements cannot.
To determine the absolute pressure of this gas, all you need to do is to add the value of atmospheric pressure and the value of gage pressure.
Atmospheric pressure is equivalent to 100 kPa.
Gage pressure is 276 kPa.
Then, we add both values.
N = 100 kPa + 276 kPa
N = 376 kPa
The absolute pressure of this gas is 376 kPa.
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A. The molarity of solution containing 5.2 g of sodium sulphate is 0.0732 M
B. The number of mole of sodium in the solution is 0.0732 mole
<h3>How to determine the mole of sodium sulphate Na₂SO₄</h3>
- Mass of Na₂SO₄ = 5.2 g
- Molar mass of Na₂SO₄ = (23×2) + 32 + (16×4) = 142 g/mol
Mole = mass / molar mass
Mole of Na₂SO₄ = 5.2 / 142
Mole of Na₂SO₄ = 0.0366 mole
<h3>A. How to determine the molarity </h3>
- Mole of Na₂SO₄ = 0.0366 mole
- Volume = 500 mL = 500 / 1000 = 0.5 L
Molarity = mole / Volume
Molarity = 0.0366 / 0.5
Molarity = 0.0732 M
<h3>B. How to determine the mole of sodium (Na) </h3>
1 mole of Na₂SO₄ contains 2 moles of Na.
Therefore,
0.0366 mole of Na₂SO₄ will contain = 0.0366 × 2 = 0.0732 mole of Na
Thus, 0.0732 mole of Na is present in the solution.
Learn more about molarity:
brainly.com/question/15370276
<span>1. Fill a beaker or graduated cylinder with enough water to completely immerse the sphere in. 2. Record the baseline initial measurement. 3. Drop the sphere in. 4 <span>Record final measurement.</span></span>
The first one because they can move forward
