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
题目16 How many moles of ions are present in 30 cm3 of 0.025 mol dm-3 barium hydroxide SO/ution,Ba(OH)_2(aq) C□ A C0.00075□ B 0.00150口 C 0.00225□D0.00450 相关知识点: 试题来源: 解析 CC is the correct answerBecause 30x0.025/1000x30=0.00225Question Number ...
The number of moles in a sample can be determined using the following g formula if we know the mass of the substance present: Number of moles = {eq}{\rm \dfrac{{Mass \ of \ substance}}{{Molar \ mass}} } {/eq}Answer and Explanation: ...
～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，所以 100 克硫中有 100/32 摩尔)...
athe eldest daughter,to translate 最老的女儿,翻译 [translate] aFor Experiments I and II, plates were incubated at least 48 为实验I和II,板材被孵化了至少48 [translate] aHow many moles of HCIO4 are in 100 g of solution HCIO4多少个痣在100 g中解答 [translate] ...
How many moles of NaNO3 are in 27.4 grams of NaNO3? Sodium Nitrate Another name of sodium nitrate is chile saltpeter. Its chemical formula is NaNO3. Sodium nitrate is used in the fertilizer industry, chemical industry, and pharmaceuticals. Answer and Explanation: Given data Mass of sodium ...
Molar mass of H=1g/mole. No. of moles= given massmolar mass No. of moles in 1g of H=1g1g/mole=1mole.Thus 1 mole of His present in 1 g of H. Was this answer helpful? 3Similar Questions Q1 How many moles of hydrogen are present in 1 gm of hydrogen? View Solution Q2 How ma...
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 ...
How many moles of calcium(Ca)atoms are in 77.4g of Ca ( 40.078 ) ? A. 40.078 B. 0.518 C. 1.931 D. uncertainty 如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: C 复制 纠错举一反三 ()违反《药品管理法》规定,给用药者造成损害的,依法...
How many moles are in 14.3g of C6H6 ? Calculate the mass of 3.22×1022 molecules of SiH4.There are 2 steps to solve this one. Solution Share Step 1 Here, it needs to determine the mole of C6H6 and mass of SiH4. Given that, View the full a...