How many moles of Na2CO3 would be needed to react with 750 mL of 0.250 M H2SO4 solution? How many moles of H2SO4 are present in 25 mL of a 6.0 M sulfuric acid solution? How many moles of KMnO4 are present in 270 mL of a 4.20 x 10-2 M solution? How many m...
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 43.0 grams of Mg(OH)2? How many moles are in 31.8 grams of Mg(OH)2? How many moles are in 19.2 grams of Mg(OH)2? How many moles are in 18.0 grams of Mg(OH)2? How many moles are in 25.0 grams of Mg(OH)2? How many grams of Mg(OH)2 are in 0.24...
1.72g of HCl is 1.72g / 36.5g/mol=0.047mol 3.40g of SO2 is 3.40g / 64g/mol=0.053mol 1dm^3=1L 1dm3 结果一 题目 calculate the number of moles present in 1.72g of hcl 3.40g of so22.how many moles in each of the following solutions.1dm3 of 1MHCL 答案 1.72g of HCl is 1...
How many moles are in 16.48 g Mg? Answer in units of mole.Molar Mass:One mole is defined as {eq}\displaystyle 6.022\ \times\ 10^{23} {/eq} atoms or molecules. Now since one atom or molecule has a unique mass due to the atomic model, each measurement of one mole will have a...
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...
cExplanation: The balanced reaction tells us that for every 2 moles of , it will need 1 mole of for the reaction to proceed to completion. In other words, the mole ratio is 2: 1 . In the example, the student only used 1 mole of . Because of the 2:1 ratio, this amount of will...
If one mole of a substance has a mass of 58.44 grams, how many moles are in 1.0 grams of the substance?Molar Mass:Molar mass refers to the mass expressed in grams of all the elements that compose a substance. It can be simply described as the ...
题目(e) Calculate how many moles of I2 were liberated from potassium iodide in the flask by25.0 cm3 of FA5.4.90×Moles of I2 =--[2] 相关知识点: 试题来源: 解析 4.90×Amount of liberated =(1.475-9.85) mol =4.90 mol 反馈 收藏 ...