6. Dopamine (C§H11NO2) is a neurotransmitter, a substance that sends signals from one nerve to another. What is the percent composition by mass of each element in one mole of dopamine?

Q: How many moles of N₂H4 are in 3.94 x 1022 molecules?

A: N2H4 is called as hydrazine. It is a hydride of group-15 elements.

Q: A.How many moles of boron trichloride are present in 1.03 x 10^23 molecules of this compound? B.How…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: ow many ions are present in 6.5 moles Al(NO3)3?

A:

Q: the mass of 1 gallon of gasoline is about 2.7 kg. Assuming the gasoline is entirely octane, C8H18,…

A: Given The mass of 1 gallon of gasoline is about 2.7 kg or 2700 grams and the gasoline is entirely…

Q: 4. Calculate the number of moles of CuSO4•5H2O in 100 g of the solid.

A: Given details, Mass (m) = 100g Atomic mass of CuSO4.5H2O = 249.68 g/mol To calculate the number of…

Q: The fuel tank of an automobile contains 62.0 kg of gasoline. If the gasoline reacts completely with…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves the…

Q: How many H atoms are present in 7.52 g of propane, C3H8?

A: The given data contains, mass of propane = 7.52 g.

Q: The reaction between potassium chlorate and red phosphorus takes place when you strike a match on a…

A:

Q: What is the mass (in kg) of 6.89 x 1025 molecules of CO2?  The molar mass of CO2is 44.01 g/mol.

A:

Q: How many moles of carbon tetrabromide are present in 4.07 x 1022 molecules of this compound?

A:

Q: How many molecules of C2H4 are in 15.0 g of this compound?

A: The molecular formula of compound is C2H4. The amount of compound is 15.0 g.

Q: How many moles of nitrogen dioxide are present in  3.36 x 10^21 molecules of this compound?  _____…

A: Number of moles of nitrogen dioxide present in can be solved by using this formula, substituting…

Q: (b) The number of moles of potassium that contains 8.93 × 104 atoms. x 10 mol

A: Given  Atoms of potassium = 8.93 x 1025  To find = number of moles of potassium

Q: What's the percentage by mass of Cl in MgCl2 if it  is 24.6% Mg by mass?

A: Intrdouction : %age by mass of Mg = 24.6%

Q: Calculate the mass in grams of 6.12 mole Cu(NO3)2.

A: Solution stoichiometry is mainly based on the calculation of moles and volumes. These two values are…

Q: How many total Cl atoms are in 5.00 g FeCl3?

A: Given that : The mass of FeCl3 = 5.00 g The molar mass of FeCl3 is 162.2 g/mol.

Q: A compound has an empirical formula of C2H4O and a molar mass of 88.g/mole. What is the molecular…

A:

Q: W

A: A mole can be defined as a unit for the amount of substance. Formula for number of moles:

Q: Calculate the percent composition by mass of calcium sulfite, CaSO3 2. Calculate the percent…

A: To Solve this problem we will calculate the percentage composition of each element present in given…

Q: 1. What is the mass of 1.22 x 1022 molecules of silicon monocarbide? How many molecules are in 99.5…

A: 1) given, molecules of silicon monocarbide = 1.22×1022 molecules Avogadro's constant, Na =6.022 ×…

Q: A thyroid condition called goiter can be treated by increasing iodine in the diet. Iodized salt…

A:

Q: How many moles are in 3.45 x 10^23 molecules of H2CO3?

A:

Q: How many moles would 1.00 x 10^23 molecules of methane(CH4) represent

A: Given  Number of molecule of CH4  = 1 × 1023 molecule  Number of mole = ?

Q: NaCl + Pb(NO3)2 ➞ 2 NaNO3 + PbCl2 How many grams of lead (II) chloride can be formed from 32.5 g…

A:

Q: How many molecules of ethanol (C2H5OH) (the alcohol in alcoholic beverages) are present in 145 mL of…

A: In order to calculate number of molecules of ethanol, first we have to calculate the number of moles…

Q: what is the mass(in grams). 5.05니 x023 of Of Carbon diox id e?

A: According to the question,  We need to calculate the mass of 5.054*1023 molecule of carbon dioxide.…

Q: Calculate the mass in grams of 4.66×10244.66×1024 molecules of propane. The chemical formula for…

A: The question is based on mole concept. we have been given molecules of propane. we have to calculate…

Q: Consider a 134.5 g sample of the compound manganese(IV) perchlorate.What is the molar mass of…

A: Since, Molar mass is the sum of atomic masses of the atom present in the molecule or compound. Thus,

Q: A rock is 6.5% by mass fayalite (Fe2SiO4), 14.2% by mass forsterite (Mg2SiO4), and the remainder…

A: In this question given: Fe2SiO4- Fayalite has 6.5% and 14.2% by mass forsterite, remaining is 79.3%…

Q: 10) What is the mass in grams of 0.852 moles of ferric oxide (Fe,O,) ? A) 136 g B) 17 g C) 5.34 x…

A: Number of moles = 0.852 mol

Q: Approximately how many molecules of H2O are in one spoonful of water, assuming that the spoon holds…

A: Given, a spoon holds about 18 mL of water.we are asked to calculate the number of water molecules in…

Q: Calculate the mass (in kilograms) of chlorine in 25 kg of chlorofluorocarbon (CFC). CF3Cl

A: The given data contains, chlorine = 25 kg.

Q: major component in steel is iron. Iron is obtained from rocks where it is often found as iron oxide…

A:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".