Answer:
3.40x10¹⁰ grams
Explanation:
First we<u> convert 5.25x10³² atoms to moles</u>, using <em>Avogadro's number</em>:
5.25x10³² atoms ÷ 6.023x10²³ atoms/mol = 88.72x10⁸ mol
Then we<u> convert K moles to grams</u>, using its <em>molar mass</em>:
88.72x10⁸ mol * 39 g/mol = 3.40x10¹⁰ g
So 5.25x10³² atoms of K would weigh 3.40x10¹⁰ grams.
<u>Answer:</u> A chemical property is the characteristic property of a substance to chemically react or change in some way into a new substance.
<u>Explanation:</u>
A chemical property of a substance is determined by the chemical change.
A chemical change is defined as the change in the chemical composition of a substance resulting in the formation of new substance. It is usually an irreversible reaction.
Hence, a chemical property is the characteristic property of a substance to chemically react or change in some way into a new substance.
Answer:
12.8 g
Explanation:
Step 1: Write the balanced neutralization reaction
Al(OH)₃ + 3 HCl ⇒ AlCl₃ + 3 H₂O
Step 2: Calculate the moles corresponding to 17.9 g of HCl
The molar mass of HCl is 36.46 g/mol.
17.9 g × 1 mol/36.46 g = 0.491 mol
Step 3: Calculate the moles of Al(OH)₃ that completely react with 0.491 moles of HCl
The molar ratio of Al(OH)₃ to HCl is 1:3. The reacting moles of Al(OH)₃ are 1/3 × 0.491 mol = 0.164 mol
Step 4: Calculate the mass corresponding to 0.164 moles of Al(OH)₃
The molar mass of Al(OH)₃ is 78.00 g/mol.
0.164 mol × 78.00 g/mol = 12.8 g
