Answer:
Explanation:
To convert from moles to grams, we must use the molar mass (also known as the gram formula mass).
First, look up the molar masses of the elements in the formula.
- C: 12.011 g/mol
- H: 1.008 g/mol
- O: 15.999 g/mol
Next, multiply by the subscript, because it tells us the number of atoms of each element in the formula.
- C₉: 4(12.011 g/mol)= 108.099 g/mol
- H₈: 8(1.008 g/mol)= 8.064 g/mol
- O₄: 4(15.999 g/mol)= 63.996 g/mol
Add the values.
- 108.099 + 8.064+63.996=180.159 g/mol
Use this molar mass as a ratio.
Multiply by the given number of moles, 0.40
The units moles of aspirin cancel.
The original number of moles has 2 sig figs (4 and 0), so answer must have the same. For the number we calculated, it is the ones place. The 0 in the tenth place tells us to leave the 2.
Some of the benefits of using measurements to find density include the following:
- It is easy and doesn't require experiments.
- The volume of both light and dense molecule can be gotten.
Some of the challenges of using measurements to find density include the following:
- Inconsistency in the grind setting
- Temperature changes not taken into account.
<h3>What is Density?</h3>
This is defined as the mass per unit volume of a substance or te degree of compactness of a substance and can be gotten with the use of measurements or experiments.
The measurement doesn't take the temperature changes into consideration which will lead to the result being most likely incorrect. It is also advantageous because less time is used thereby making it easier.
Read more about Density here brainly.com/question/406690
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Number 4. 1 and 2 are both wrong. Copper is a metal and sulfur is a nonmetal. And when a bond is made, energy is stored.
Answer:
It results from microscopic bumps and ridges
It causes a change in motion
It is opposite to the direction of the motion.
It is parallel to the surfaces that rub together.
Explanation:
