137 Answered Questions for the topic Moles


How many individual Ni atoms are contained in 1.25 grams of Ni? (

I don't know if I'm missing something or not, but I've tried this question so many times. My answer is always wrong. I'm using the correct conversion formula, but my answer is always wrong.


help: Calculate the value of the equilibrium constant, Kc

A mixture initially contains A, B, and C in the following concentrations:  A= 0.350M  ,  B= 1.35M  , and  C= 0.300 M . The following reaction occurs and equilibrium is established:A+2B ⇌ CAt... more

A certain mass of an unknown third period metal hydroxide reacts with an certain volume and concentration of a diprotic acid. How do I figure out the identity of the metal?

I used dimensional analysis and the molarity of the acid to find the moles of the acid, then multiplied it by the 1:2 stoichiometric ratio since it's a diprotic acid. This gave me the moles of the... more


Chemistry moles, molecules, ions, and molarity question

A solution containing 50.8 g of sodium sulfate in a volume of 0.558 L was prepared. Calculate the number of moles of sodium sulfate in this solution. Calculate the number of molecules of sodium... more
Moles Chemistry


S   +   6 HNO3 →  H2SO4  +  6 NO2  +   2 H2O

S   +   6 HNO3 →  H2SO4  +  6 NO2  +   2 H2OIn the above equation, how many grams of water can be made when 13.6 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more

What is the number of moles from this chemical equation below?

2NaOH(aq) + CaBr2(aq) ==> Ca(OH)2 + 2NaBr(aq)

What is the number of particles or formula units of this chemical eqution?

2NaOH(aq) + CaBr2(aq) ==> Ca(OH)2 + 2NaBr(aq)
Moles Chemistry Chem


chemistry/ how many moles

How many moles of NH₃ can be produced from 5.48 moles of nitrogen in the following reaction: N₂ (g) + 3 H₂ (g) → 2 NH₃ (g) ?

4NH3 + 5O2 = 4NO + 6H2O How many grams of Oz were required to make 10.00 grams of H20?

Grateful for any help given!

4NH3 + 5O2 = 4NO + 6H2O How many moles of NO are produced if 6.96 grams of NH3 react with an excess amount of oxygen?

Grateful for any help! If you could explain the work that'd be helpful as well!

4NH3 + 5O2 = 4NO + 6H2O If you made with 9.67 moles of H20, how many moles of NO were also produced?

Already balanced equation I keep getting this one wrong and I'm not sure if it's my setup or if I'm dividing something wrong. Grateful for any help given!

Mass of CaCl2: 10,0 g Mass of Na2CO3: 10.0 g Actual amount collected: 2.00 g CaCO3 1. Write a balanced chemical equation.

A student performs a lab at school. They massed out both reactants and then mixed them together. The reaction produced a precipitate. They filtered out the product and took the mass of it. (I'm a... more


stiochiometry: chemistry

1 C5H12 + 8 O2 --> 5 CO2 + 6 H2OStarting with 83.42 grams of Oxygen gas in excess C5H12, how much Carbon Dioxide can be created?


Equation: C3H8 + 5O2 --- 3CO2 + 4H2O

Equation: C3H8 + 5O2 --- 3CO2 + 4H2Oa) How many moles of CO2 are produced from 14.8 g of C3H8?b) How many moles of CO2 are produced from 3.44 g of O2?c) If you mixed 14.8 g C3H8 with 3.44 g O2,... more

Calculate the amount of aniline - in mL - needed for the reaction

A reaction uses 5.00 millimoles of aniline. the molecular weight of aniline is 93.13 g/mol and the density is 1.02 g/mL. Calculate the amount of aniline - in mL - needed for the reaction

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