A 58g sample of a gaseous feul mixture contains 0.43 mole fraction C3H8. 这句话怎么理解?是样品...A 58g sample of a gaseous feul mixture contains 0.43 mole fraction C3H8. 这句话怎么理解?是样品含0.43mol 丙烷还是丙烷的摩尔

a sample of gas has a density of 1.96g/l at STP.Determine its molar mass. A 58g sample of a gaseous feul mixture contains 0.43 mole fraction C3H8. 这句话怎么理解?是样品...A 58g sample of a gaseous feul mixture contains 0.43 mole fraction C3H8. 这句话怎么理解?是样品含0.43mol 丙烷还是丙烷的摩尔 If Sample is a class,________ is correct copying constructor of this class.a) void Sample(const int& a); b) void Sample(const int& a) const; c) Sample(const int& a); d) Sample(const int& a) const Combustion of a 0.9835-g sample of a compound containing only carbon,hydrogen,and oxygen produced 1.900 g of CO2 and 1.070 g of H2O.a.What isthe empirical formula of the compound? 英语翻译cell sample in a final volume of 100 ul. a 0.7549 g sample of a compoun burns in O2 to produce 1.9061g of CO2 and 0.3370g H201.calculate the individual masses of ,c,h,and o in the 0.7549 sample2.determine the empirical formula of the compound. SAT2化学题,涉及randomnessIncreased randomness results under which of the following conditions?1.A 1L sample of He(g) and 1L sample of Ne(g) are mixed in a 2L flask.2.Ice melts.3.CaO(s) reacts with CO2(g) to form CaCO3(s).(A)1 only(B)2 only(C)1 a Matlab 里编写的牛顿迭代法,不知道什么出错了,请大家帮帮忙function newton(f,a)g=diff(f);for n=1:20 x=a; fa=eval(f); ga=eval(g); a=a-fa/ga; X=a; format longdisp(X)%output 'approximate value of a'end 当我用x^3+x^2+5 A 1.778g sample of a component of the light petroleum distillate called naphtha is found to yield5.450g CO2(g) and 2.602g H2O(l) on complete combustion.Use the masses of carbon dioxide,CO2,and water,H2O,to determine the empirical formula of the alkan Sample of the product,where possible,if not a justification why it has not been possible to obtain a sample英翻中，打错了。 急需一篇英文文献The Relationship Between Parenting Styles andCreativity in a Sample of Jamaican Children a sample used for the shipping approval of products prior to shipment after mass production Why was the origin of life a sample step in the Earth's history? #include class Sample { int x; public:Sample(){}; Sample(int a){x=a;} Sample(Sample &a为什么输出是X=3X=12后边的不是2+1+10=13呢?全程序是这样#includeclass Sample{int x;public:Sample(){};Sample(int a){x=a;}Sample(Sample &a){x=a.x++ +10 计量单位请问a.i.g/hm2和ga.i./ha分别是什么单位? 英语翻译：sample looks a bit hippy NO VALUE-COMMERCIAL SAMPLE.客户的邮件：We also need you send us a sample of its product for better evaluation.Please send like:NO VALUE-COMMERCIAL SAMPLE.我是刚刚从事外贸工作的. A sampling distribution problem?A random sample of size 81 is drawn from a population with a standA random sample of size 81 is drawn from a population with a standard deviation of 16.If only 18% of the time a sample mean greater than 300 is obtained