The density of a gas is 1.96 g/L at STP. What is its molar mass? A) 65.2 g/mol B) 58.9 g/mol C) 11.4 g/mol D) 22.4 g/mol E) 43.9 g/mol How many moles are in a sample of ethanol, CH3CH2OH,...
百度试题 结果1 题目How many moles of Na+ ions are in 20 mL of 0.40 mol/LNa3PO4? ( ) A. 0.0080 B. 0.024 C. 0.050 D. 0.20 相关知识点: 试题来源: 解析 B 反馈 收藏
How many moles are in 29.0 grams of aluminum? Aluminum: Aluminum has been proved to be such a useful metal that it has a number of benefits. It has the characteristic of both light weight as well as being flexible. Answer and Explanation: ...
How many moles are in 45.0 grams of silver? Molar Mass of Chemical Elements: While the weighing scale is commonly used in chemical laboratories to establish the quantity of a sample of chemical, chemists sometimes prefer to work in alternative units called 'moles'. The advantage of this practic...
How many moles are in 150.0 grams of C4H10O? If you had 6 grams of CH4, how many moles would this be? If I have 0.21 grams of KHP, how many moles is that? Suppose the mass of one mole of a substance is 45.0 g. How many moles of the...
～How many moles are there in100 grams of sulfur? ( 100 克硫有多少摩尔 ～Per mole of sulfur atom consists of 6.02×1023 sulfur atoms and its qualty is 32 grams, so there are 100/32 moles in100 grams of sulfur. (1 摩尔的硫原子含 6.02×1023 个硫原子，质量为32克，...
moles of water in one drop = 0.002775 moles Using Avogrado's Number 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...
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0.1摩尔,氯气的摩尔质量为71g/mol.
Reaction: 2Q + 5R → 4S. If 10 moles of R react, how many moles of S are formed? A. 6 B. 8 C. 10 D. 12 相关知识点: 试题来源: 解析 B。5 摩尔 R 生成 4 摩尔 S,10 摩尔 R 生成的 S 的物质的量为 10÷5×4 = 8 摩尔。反馈 收藏 ...