百度试题 结果1 题目In one mole of a solution with a mole fraction of 0.5 water, how many water molecules would there be? A. 0.5NA B. 1.0NA C. 0.25NA D. 2.0NA 相关知识点: 试题来源: 解析 A 反馈 收藏
After the revision of the International System of Units (SI), the mole (the SI unit of amount of substance) is based on a fixed number of specified entities. This number is the fixed numerical value of the Avogadro constant N-A. Experiments for the practical realization of the mole on a...
Finally, useAvogadro's numberto determine the number of molecules in a drop of water. Avogadro's number tells us there are 6.022 x 1023molecules of water per mole of water. So, next we calculate how many molecules there are in a drop of water, which we determined contains 0.002775 moles:...
百度试题 结果1 题目How many molecules of CO2 are produced per mole of acetyl COA in TCA cycle? A. 1 B. 2 C. 0 D. 4 E. 3 相关知识点: 试题来源: 解析 B 反馈 收藏
How many molecules, N, are in m=7.27×10−19 grams of carbon dioxide, CO2 ? (atomic masses: C= 12u;O=16u ). Please round your answer to the nearest whole number (integer). Equation: N=MmNA where M is the molar mass of CO2 and...
How many molecules are in 12.0 grams of O2? Avogadro's Number:When working with very large quantities, Avogadro's number is employed. By linking the quantity of material to the number of particles, it connects the macroscopic and microscopic worlds....
There is no way to know how many molecules are in a tablet weighing 500 mg without knowing the molecules in the table. Each molecule has a different... See full answer below.Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our ...
How many atoms are contained in each of the following? (Enter your answer in scientific notation if necessary, i.e.,1.00E+10) 4molecules5 ◻atoms Here’s the best way to solve it.
Answer to: How many nitric acid molecules are in 4.20 grams of HNO3? By signing up, you'll get thousands of step-by-step solutions to your homework...
The mass of an element or molecule in atomic mass units is equal to the mass of a mole of the same particles in grams. Divide the number by 1,000 to get the molar mass in kilograms. What Is a Mole? A mole is a very large number of atoms or molecules. This large number, known ...