Answer:
Elements combine to form chemical compounds that are often divided into two categories
When two or more atoms chemically bond with each other, the resultant chemical structure is a molecule.
Answer:
171°F is the answer of this question
Answer:
The town should find a new source of water.
Explanation:
Step 1: Convert the mass of copper to milligrams
We will use the conversion factor 1 g = 1000 mg.
0.002 g × (1000 mg/1 g) = 2 mg
Step 2: Convert the mass of solution to kilograms
We will use the conversion factor 1 kg = 1000 g.
1000 g × (1 kg/1000 g) = 1 kg
Step 3: Calculate the concentration of Cu in ppm (mg/kg)
2 mg/1 kg = 2 ppm
This is over 1.3 ppm, so the town should find a new source of water.
Answer:
124.56 moles of Hydrogen atoms.
Explanation:
We'll begin by calculating the number of moles of ethane that contains 1.25×10²⁵ molecules. This can be obtained as follow:
From Avogadro's hypothesis, 1 mole of any substance contains 6.02x10²³ molecules. This implies that 1 mole of ethane also contains 6.02x10²³ molecules.
Thus, 6.02x10²³ molecules are present in 1 mole of ethane.
Therefore, 1.25×10²⁵ molecules are present in = 1.25×10²⁵/6.02x10²³ = 20.76
Therefore, 20.76 moles of ethane contains 1.25×10²⁵ molecules.
Finally, we shall determine the number of mole of Hydrogen in 20.76 moles of ethane. This can be obtained as follow:
Ethane has formula as C2H6.
From the formula, 1 mole of ethane, C2H6 contains 6 moles of Hydrogen atoms.
Therefore, 20.76 moles of ethane will contain = 20.76 × 6 = 124.56 moles of Hydrogen atoms.
Therefore, 1.25×10²⁵ molecules of ethane contains 124.56 moles of Hydrogen atoms.
