One mole of silicon has a mass of 28.1 g, and one mole of oxygen has a mass of 16.0 g. What is the mass of one mole of silicon dioxide? Molar Mass: The molar mass pertains to the mass of one mole of a substance. ...
The molar mass of a substance is the mass of one mole of that substance. What is the unit of molar mass? A. g/mol B. mol/g C. L/mol D. mol/L 相关知识点: 试题来源: 解析 A。本题考查摩尔质量的单位。摩尔质量是指单位物质的量的物质所具有的质量,单位是克每摩尔(g/mol)。选项 B ...
37. What happens when one mole of ethane is mixed in the dark at room temperature with six moles of chlorine gas?A A. There is no reaction. B. Only$$ C _ { 2 } C _ { 4 } $$is are formed. C. $$ C _ { 2 } C l _ { 5 } $$ and HCl are formed. D.$$ C H _ ...
(b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27)? (c) 10 moles of sodium sulphite(Na2SO3)? View Solution (a) Calculate the formula unit mass ofNa2SO4 (b) What is the mass of one mole of sulphur atoms? (c) Convert 12 g of oxygen into mole. ...
If one mole of nitrogen molecules weighs28g, calculate the mass of one molecule of nitrogen in grams. View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep,...
This is given by simple equation {eq}moles = \dfrac{no.\ of\ molecules}{Avogadro's\ number} {/eq}, where {eq}Avogadro's number = 6.022 \times 10^{23}\ \frac{molecules}{mole} {/eq}.Answer and Explanation: Solving the number of moles given the number of molecules using...
9 What is the number of oxygen atoms, in terms of the Avogadro number $$ N _ { A } $$, in one mole of carbon dioxide ($$ ( C O _ { 2 } $$)?A$$ \frac { 1 } { 3 } N _ { A } $$B$$ \frac { 2 } { 3 } N _ { A } $$C$$ N _ { A } $$D$$ 2 N...
When 6.66 g of methane (CH_4) gas, was burned in excess oxygen at 75 degrees C, the internal energy change was -367.2 kJ. Calculate the enthalpy change for the combustion of one mole of methane at 75 degrees C. Using the standard heats of formation, what is ...
Mole (Chemistry) (TerminologyTerms and phrases (EvaluationJeannin, YvesMills, Ian MInternationalunionofpureandappliedchemistryJeannin Y 2010 A fixed Avogadro constant or a fixed carbon-12 molar mass: which one to choose? Chem. Int. 32 (January-February) 8-10...
1.Water is composed of two atoms of hydrogen and one atom of oxygen per molecule,which represents 11.2 percent hydrogen and 88.8 percent oxygen by( ). A.mass B.volume C.mole D.molecule 2.Compounds may contain more than one atom of the same element.The following selections all comply with...