Which of the following has the lowest mass?

Question

BlackTom AI · Accepted Answer

Question: Which of the following has the lowest mass?

First, note that the provided data includes only one explicit option in the answer field: 'b. 0.5 mol of AlF3'. There are no other answer options listed, so a complete comparison across all choices cannot be performed from the given information.

To compare masses across different options, you would generally convert each option to a mass in grams using the formula:
mass = number of moles × molar mass.

For the option given (0.5 mol of AlF3):
- Determine the molar mass of AlF3. Aluminum (Al) has an approximate atomic mass of 26.98 g/mol, and fluorine (F) has an atomic mass of about 19.00 g/mol. AlF3 consists of 1 Al atom and 3 F atoms, so:
  M(AlF3) ≈ 26.98 + 3×19.00 = 26.98 + 57.00 ≈ 83.98 g/mol.
- Mass of 0.5 mol of AlF3 ≈ 0.5 × 83.98 ≈ 41.99 g (roughly 42 g).

With only this option available, you can say that this option corresponds to a mass of about 42 g. However, to determine whether this is the lowest mass, you would need the masses of all other options for direct comparison.

If you later obtain the missing options, apply the same method to each:
- Find the molar mass of the species in each option.
- Multiply by the number of moles given in that option to get the mass in grams.
- Compare the resulting masses; the smallest value is the lowest mass among the options.

Common pitfalls to avoid: assuming that a smaller number of moles always means a smaller mass without considering the molar mass; some compounds have very high molar masses per mole (e.g., heavy metal-containing species), which can offset fewer moles.

Summary: From the available data, the mass corresponding to 0.5 mol of AlF3 is about 42 g. To determine definitively which option has the lowest mass, you need the rest of the answer choices to compare directly.

Which of the following has the lowest mass?单项选择题

类似问题

Question textWhat is the molecular mass of your product in g/mol to the nearest whole number? [table] Chlorinated DBA-1 | Answer 1 Question 5 g/mol Chlorinated DBA-5 | Answer 2 Question 5 g/mol Chlorinated DBA-6 | Answer 3 Question 5 g/mol [/table]

What is the mass in kilograms of 10 moles of Ibuprofen (an anti-inflammatory drug) ? (MW Ibuprofen = 206.3)

Which sample will have the greatest mass?

What is the mass of 91.4 moles of NH3 molecules?

The molar mass for H is 1 and for He is 4. What is the ratio of the molar mass of He to that of H2?

Find the molar mass of ethanol, C 2 H 6 O C 2 H 6 O . BlackTom题目解析

Q13 V20.0438 mol of an organic compound has a mass of 1.84 g. The compound is likely to be an:

3.0 g of a gas occupies the same volume as 1.0 g of methane gas, CH4, at the same temperature and pressure. The gas could be: [ Molar Masses (g mol-1) C = 12.0 H = 1.00 O = 16.0 N =14.0 ]

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单