How many grams of H2 would be formed if 34 grams of carbon reacted with an unlimited amount of H2O? The reaction is:C + H2O CO + H2
1) Is this equation balanced?
2) What is the starting substance?
3) What is the ending substance that is asked for in the problem?
Additional info: The atomic mass of C is 12.01 g/mole. The atomic mass of H2 is 2.016 g/mole.
Answers
Left side: 1C, 2H and 1O
Right side: 1C, 1O, 2H
2) Starting substances: water and carbon
There are two starting substances also called reactants. H2O which is a compound and C which is an element.
3) Ending substance asked for: H2.
This is hydrogen gas.
Stoichiometry:
1 mol of C produces 1 mol of H2
12.01 g of C productes 2.016 grams of H2
Ratio: 2.016 g of H2 / 12.01 g of C = X g of H2 / 34 g of C =>
x = 34 g of C* 2.016 g of H2 / 12.01 g of C= 5.707 g of H2
Related Questions
Rank the four gases (air, exhaled air, gas produced from from decomposition of H2O2, gas from decomposition of NaHCO3) in order of increasing concentration of oxygen).
Suppose you had 2.0158grams of hydrogen (H2). A.How many moles of hydrogen do you have? B. How many moles of oxygen would react with this much hydrogen? C. What mass of oxygen would you need for this reaction? D. How many grams of water would you produce?
On day 5, only two turtles are on the beach. Describe an unknown variable that could have affected the data.
Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N2 → Mg3N2 In a particular experiment, a 9.27-g sample of N2 reacts completely. The mass of Mg consumed is __________ g.
b. sugar.
c. water.
d. vinegar.
Answers
How many moles of H2 are produced?
How many liters of H2 are produced?
Answers
0.5 moles is required for the given reaction to occur. Mole is a constant that represents a certain amount of particles such as atoms, ions, or molecules.
What is the Mole concept?
It is the number or constant that represents a certain amount of particles such as atoms, ions, or molecules.
1 mole = particles.
Where,
- number of moles
- given mass = 13.5 g.
- molar mass = 26.98 g/mol.
Put the values in the formula,
Therefore, 0.5 moles is required for the given reaction to occur.
Learn more about Mole concept:
Answer:
1) 0.5 mol.
2) 0.75 mol.
3) 16.8 L.
Explanation:
1) How many moles of Al react?
- We can calculate the number of moles of Al (n) using the relation:
n = mass / molar mass,
Mass of Al = 13.5 g.
Molar mass mass of Al = 26.98 g/mol.
∴ The number of moles of Al (n) = mass / molar mass = (13.5 g) / (26.98 g/mol) = 0.5 mol.
2) How many moles of H₂ are produced?
- It is a stichiometry problem.
- We should write the balanced equation of the reaction:
2Al + 6HCl → 2AlCl₃ + 3H₂.
- It is clear that 2.0 moles of Al reacts with 6.0 moles of HCl to produce 2.0 moles of AlCl₃ and 3.0 moles of H₂.
Using the cross multiplication:
2.0 moles of Al → 3.0 moles of H₂, from the stichiometry,
0.5 mole of Al → ??? moles of H₂.
∴ The number of moles of H₂ are produced = (0.5 mole)(3.0 mole) / (2.0 mole) = 0.75 mol.
3) How many liters of H₂ are produced?
It is known that at STP, 1.0 mole of any gas occupies a volume of 22.4 L.
Using cross multiplication:
1.0 mole occupies → 22.4 L.
0.75 mole occupies → ??? L.
∴The number of liters of H₂ are produced = (0.75 mole)(22.4 L) / (1.0 mole) = 16.8 L.
It is a strong base and a very poor conductor of electric current.
B.
It is a strong acid and a very good conductor of electric current.
C.
It is a weak base and a very good conductor of electric current.
D.
It is a weak acid and a poor conductor of electric current.
Answers
Substance A is mixed with water and donates 0.4% of its H⁺ ions, therefore given substance is a weak acid & show poor conduction of electric current.
What are acids?
According to the Arrhenius theory of acids and bases, acids are those species which gives H⁺ ion to the solution.
In the question it is given that, substance A is mixed with water and it donates H⁺ ion, from this it is clear that given substance is acid. It is also mention that it donates only 0.4% of its H⁺ ion means partial dissociation is observed, so we conclude that this acid is weak in nature. And due to weak dissociation and less number of available H⁺ ion it did not conduct electricity effectively.
Hence, option (D) is correct i.e. it is weak acid and a poor conductor of electric current.
To know more about acids, visit the below link:
Answer:
D
Explanation:
Answers
Answer:
Independent Variable = Years
Dependent Variable = Number of Mobiles phone owners
Explanation:
Independent variables are plotted on x-axis and the dependent variables are plotted on y-axis.
In given graph the "Years" belong to x-axis hence, years are the independent variables.
Also, "Number of Mobile phones owners" belong to y-axis hence, this number is the dependent variable.
a. distillation
b. chromatography
c. filtration
d. crystallization
Answers
Answer:
c.filtration is the answer
Answers
Weak acid dissociates partially in water to form hydronium ion and conjugate base of the acid. Since the acid is weak the conjugate base is strong. Acetic acid is a weak acid which dissolves in water to form hydronium ion and acetate ions (conjugate base).
CH₃COOH + H₂O → H₃O⁺ + CH₃COO⁻