if 2.0 mol of HF are exposed to 4.5 mol of SiO2,which is the limiting reactant?SiO2(s)+4h=HF(g)→SiF4(g)+2H2O(I)

if 2.0 mol of HF are exposed to 4.5 mol of SiO2,which is the limiting reactant?SiO2(s)+4h=HF(g)→SiF4(g)+2H2O(I) HF burning~if you are dreaming of翻译中文 if you afraid losing me和if you are afraid of losing me有什么区别 将浓度为0.1mol/L HF 溶液加水不断稀释,为什么 氢离子的浓度/HF的浓度 始终保持增大? 英语翻译：Children are easily( 噎住 )if they are not taken good care of. pets are parts of people's life.if you are like Excuse me ,how much are these postcards?They are for _____ if the cost of o If you are aware of what you are doing, you can manage yourself什么意思 the life of fish什么意思If you are interested in the life of fish. Have a s____ of the eggs and tell me if they are goodHave a s____ of the eggs and tell me if they are good If you take a 0.1g does of Vitamin C,C6H8O6,how many moles is this?A.0.1MOL B.5.68×10^-4 C.17.61MOLD.2.01MOL If you have the stone of Wind gusts of strong wind are know of blow in the caves 英语翻译If words of command are not clear and distinct,if orders are not thoroughly understood,the general is to blame.But if his orders are clear,and the soldiers nevertheless disobey,then it is the fault of their officers. 下面一定能说明HF是弱酸的是?1常温下NaF溶液的PH大于7 2.用HF溶液做导电性实验,灯泡很暗3.HF与NaCl不能发生反应4.常温下0.1mol/L 的 HF 溶液的PH为2.35.HF能与碳酸钠溶液反应,产生二氧化碳6.HF能与 化学平衡移动的计算已知HF气体中存在下列平衡：2(HF)3可逆3（HF）2,（HF）2可逆2HF.若平衡时,混合气体的平均摩尔质量为42g/mol,则（HF）3的体积分数为（.）A.10% B.＜10%C.＞10 D.不能 Tom ,here are some kinds of food.Help _______ To some if you like. 英语翻译if you were any kind of gentlemen 其中的 were改成 are可以吗原因