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用过量铁片与稀盐酸反应，为加快其反应速率而生成氢气的量不变，下列措施中可行的是①以铁屑代替铁片②用过量锌片代替铁片③在稀盐酸中加入少量CuSO4溶液④在稀盐酸中加入CH3COONa固体⑤在稀盐酸中加入等物质的量浓度的硫酸⑥在稀盐酸中加入硫酸钾溶液⑦微热（不考虑HCl的挥发）⑧在稀盐酸中加入NaNO3固体 ...
40 grams ofNaOHin 1000 mL of water equals how many equivalent(s) ofOH−? a. 23 b. 17 c. 3 d. 1 e. 40 Equivalents: For bases as well as acids, the count of moles of hydroxide or hydronium ion liberated upon dissolution is called equivalents. It is calculated...
How many grams of KOH are present in 34.5 mL of a 6.02 M KOH solution? How many grams of KOH are contained in 50.00 mL of an aqueous solution of 0.650 M? How many moles NaOH are in 66.4 mL of 0.1 M solution? How many moles of NaOH are present in 850 mL of 0.6 ...
Find the molar mass of an NaOH. What is the mass of 2.10 x 10^22 molecules of NaOH (molar mass = 40.0 g/mol)? How many grams of sodium are in 2.5 moles? How many moles are in 14.0 grams of sodium? How many moles are in 7.633 grams of sodium? How many moles are in 4.50 gra...
1 物质的量浓度 3.\x05Ex.How many milliliters of 12.0 M hydrochloric acid contain 7.30g of HCl solute (36.46g/mol)? 4.\x05What is the mass of H2SO4 (98.09 g/mol) in 50.0mL of 6.00M sulfuric acid? 5.\x05How many grams of NaOH are there in 2.50L of 0.343M solution? 反馈...
The molar mass of NaOH is 40g/mol, how many grams of NaOH are required to yield 0.65 mol? How many moles of H2O are produced when 2.66 moles of NaOH and 1.40 moles of CO2 are allowed to react? 2NaOH(s) + CO2(g) arrow ...
In other words, how many milligrams of the salt would you need to weigh out and add to a liter of solution? First, begin by converting millimolar to molar: (10 mmol MgCl2/1 L)x(1 mol/1000 mmol) = 0.010 mol MgCl2/1 L. Next, you can use the molar mass to find how many grams ...
How many moles of H2SO4 are requried to produce 1 " mol of "H2S when KI reacts with H2SO4 producing I2 and H2S? View Solution What weight of 98% pure H2SO4 is required to neutralize 80gm of NaOH? View Solution How many gram equivalents of H2SO4 are present in 200 ml of N10...
Now let us tackle your question in exactly the same way : I will give you 8.32 x 10^24 molecules of water How many moles of water have I given you ? Then I tell you that 1 mol of olecules is 6.022*10²³ molecules Now you have no problem : ...