B I believe. Hope this helps you!
-Belle
Answer:
9.72 × 10^20 molecules
<h3>
Explanation:</h3>
We are given;
- The mass of the compound C16H18N2O4S as 540 mg
- Molar mass of C16H18N2O4S = 334.4 g/mol
We are required to determine the number of molecules in 540 mg of penicillin.
- We know that 1 mole of a compound contains molecules equivalent to the Avogadro's number.
- That is, 1 mole of a compound = 6.022 × 10^23 molecules
- Therefore, 1 mole of C16H18N2O4S = 6.022 × 10^23 molecules
But, 1 mole = 334.4 g
Thus, 334.4 g of C16H18N2O4S contains 6.022 × 10^23 molecules
Mass of C16H18N2O4S = 540 mg or 0.54 g
Molecules in 0.54 g will be;
= (0.54 g ÷ 334.4 g) × 6.022 × 10^23 molecules
= 9.72 × 10^20 molecules
Answer:
increases only slightly; large
explanation
Water has one of the highest specific heats of any known liquid. This means that the temperature of a water sample _only increase slightly_______ with the input of a __large______ amount of energy.
Answer: The mole allows people to calculate the number of middle schoolers entities (usually atoms or molecules. Isabella's number is an absolute number: there are 6.022 × 1023 middle schoolers entities is in 1 mole. This can also be written as 6.022 × 1023 mol-1.
Explanation: I hope that helped !!
Answer:
Direct current is transferred over the wire and is then added to the bulb. The bulb then uses the electrons and heats an element causing it to glow.
Explanation:
Battery's are direct current not Alternating current AC/DC. Electrons flow over a wire not through it. bulbs use heat and resistance to illuminate.