Qualitative I believe is right
Nitrates and chlorides are highly soluble, whereas sulfates and phosphates are less soluble along with the common ions used in medicine.
<u>Explanation:</u>
Mostly calcium and magnesium salts are utilized in medications. On the basis of the solubility rules, chlorides and nitrates are highly soluble also have few precipitates among the metal salts.
But, sulfates produces a lower solubility salt with calcium, generally in many medications.Additionally phosphate forms the low solubility salts along with Magnesium and calcium that are used in medications.
Answer: 0.50 mole K2O
Explanation: To convert the mass of K2O to moles we will need to find the molar mass of K2O.
47.2 g K2O x 1 mole K2O / 94 g K2O
= 0.50 mole K2O
Answer:
38.3 miles
Explanation:
First, we <u>convert 1.95 gallons to mililiters</u>:
- 1.95 gallons * = 7380.75 mL
Then we <u>calculate how many grams of octane are available for the reaction</u>, using its density:
- 0.6916 g/mL * 7380.75 mL = 5104.53 g C₈H₁₈
Now we <u>convert octane grams into octane moles</u>, using its molar mass:
- 5104.53 g C₈H₁₈ ÷ 114 g/mol = 44.78 mol C₈H₁₈
Then we <u>calculate how many kJ are produced from the combustion of 44.78 mol C₈H₁₈</u>, <em>if 2 moles produce 10900 kJ</em>:
- 44.78 mol * 10900 kJ / 2 mol = 244032 kJ
We<u> calculate how many seconds is the car available to keep going</u>, <em>if it spends 115 kJ per second</em>:
- 244032 kJ * 1 s / 115 kJ = 2122.02 s
We convert seconds to hours:
- 2122.02 / 3600 = 0.59 hours
Finally we calculate the distance:
- 65 mi/hour * 0.59 hour = 38.3 mi