Density is the <u>degree of the heaviness of a particular substance. </u>
- Density can also be defined as the<u> unit mass of a substance per the substance's volume.</u>
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Density is said to be the characteristic property of a pure substance because the <u>density of a pure substance</u> is <u>constant and fixed </u>
- <u>Pure substances</u> are substances that are homogenous in nature, which means they are uniform and are made up of only <u>one component.</u>
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- Density is said to be the <u>characteristic property</u> of a <u>pure substance </u>because the density of a pure substance<u> is constant and fixed</u> but its <em>mass and volume can vary. </em>
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Answer:
317.6 mL
Explanation:
Step 1: Write the balanced neutralization equation
MgO + 2 HCl ⇒ MgCl₂ + H₂O
Step 2: Calculate the mass corresponding to 640.0 mg of MgO
The molar mass of MgO is 40.30 g/mol. The moles corresponding to 640.0 mg (0.6400 g) of MgO are:
0.6400 g × (1 mol/40.30 g) = 0.01588 mol
Step 3: Calculate the moles of HCl that react with 0.01588 moles of MgO
The molar ratio of MgO to HCl is 1:2. The moles of HCl are 2/1 × 0.01588 mol = 0.03176 mol
Step 4: Calculate the volume of 0.1000 M HCl that contains 0.03176 moles
0.03176 mol × (1 L/0.1000 mol) = 0.3176 L = 317.6 mL