1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
natka813 [3]
3 years ago
5

The reaction between potassium chlorate and red phosphorus takes place when you strike a match on a matchbox. if you were to rea

ct 65.1 g of potassium chlorate (kclo3) with excess red phosphorus, what mass of tetraphosphorus decoxide (p4o10) could be produced?
Chemistry
1 answer:
Phantasy [73]3 years ago
6 0

Since the problem states that excess amount of red phosphorus is supplied, therefore this only means that all of potassium chlorate are consumed to form the product tetraphosphorus decoxide.

The reaction is given as:

10KClO3(s) + 3P4(s) → 3P4O10(s) + 10KCl(s) 

 

First, we calculate for the amount of KClO3 in terms of moles. The molar mass of KClO3 is 122.55 g / mol.

moles KClO3 = 65.1 g / (122.55 g / mol)

moles KClO3 = 0.5312 mol

 

Using stoichiometric ratio of the balanced reaction, 10 moles of KClO3 produces 3 moles of P4O10, therefore:

moles P4O10 = 0.5312 mol KClO3 (3 moles of P4O10 / 10 moles of KClO3)

moles P4O10 = 0.16 mol

Converting this to mass by multiplying the molar mass of P4O10 = 283.886 g/mol

mass P4O10 = 0.16 mol * 283.886 g/mol

mass P4O10 = 45.24 g

 

ANSWER: 45.24 g P4O10

You might be interested in
What is the mass of 2.80 grams of H2O
IrinaK [193]

The mass of 2.80 grams of h2o is 18.02 amu I believe

8 0
3 years ago
A student prepares a solution of Potassium Nitrate (KNO3) containing 95g at 40 C. This solution is -
Sholpan [36]

Answer:

unsaturated

Explanation:

4 0
2 years ago
Mandelic Acid is an organic acid composed of carbon (63.15%), hydrogen (5.30%), and oxygen (31.55%). Its molar mass is 152.14 g/
Dafna1 [17]

Answer:

Empirical formula is C3H3O

Molecular formula C9H9O3

Explanation:

From the question given, we obtained the following data:

Carbon = 63.15%

Hydrogen = 5.30%

Oxygen = 31.55%

We can obtain the empirical and molecular formula by doing the following as illustrated in the attached file. Please see attachment for explanation.

3 0
3 years ago
Read 2 more answers
Does an astronaut have more mass on earth then space? why or why not?
katovenus [111]

Answer:

No

Explanation:

No, his mass remains the same no matter where he is in the universe.

But then again the moon has less gravitational pull, therefore your weight and mass will be smaller in space and on the moon than on earth

I hope this was helpful! ;)

3 0
3 years ago
"How much NH4Cl, when present in 2.00 liters of 0.200 M ammonia, will give a solution with pH = 8.20? For NH3, Kb = 1.8 x 10-5"
Andru [333]

Answer:

245.66g of NH₄Cl is the mass we need to add to obtain the desire pH

Explanation:

The mixture of NH3/NH4Cl produce a buffer. We can find the pH of a buffer using H-H equation:

pH = pKa + log [A⁻] / [HA]

<em>Where [A⁻] is the molar concentration of the base, NH₃, and [HA] molar concentration of the acid, NH₄⁺. This molar concentration can be taken as the moles of each chemical</em>

<em />

First, we need to find pKa of NH₃ using Kb. Then, the moles of NH₃ and finally replace these values in H-H equation to solve moles of NH₄Cl we need to obtain the desire pH.

  • <em>pKa NH₃/NH₄⁺</em>

pKb = - log Kb

pKb = -log 1.8x10⁻⁵ = <em>4.74</em>

pKa = 14 - pKb

pKa = 14 - 4.74

pKa = 9.26

  • <em>Moles NH₃</em>

<em>2.00L ₓ (0.200mol NH₃ / L) = 0.400 moles NH₃</em>

  • <em>H-H equation:</em>

pH = pKa + log [NH₃] / [NH₄Cl]

8.20 = 9.26 + log [0.400 moles] / [NH₄Cl]

-1.06 =  log [0.400 moles] / [NH₄Cl]

0.0087 =  [0.400 moles] / [NH₄Cl]

[NH₄Cl] = 0.400 moles / 0.0087

[NH₄Cl] = 4.59 moles of NH₄Cl we need to add to original solution to obtain a pH of 8.20. In grams (Using molar mass NH₄Cl=53.491g/mol):

4.59 moles NH₄Cl ₓ (53.491g / mol) =

<h3>245.66g of NH₄Cl is the mass we need to add to obtain the desire pH</h3>

<em />

3 0
4 years ago
Other questions:
  • Which element is most likely to allow electricity to pass through it?
    6·2 answers
  • If an atom has 35 protons in the nucleus how many electrons will have orbiting the nucleus
    10·1 answer
  • 74) A solution is prepared by dissolving 0.60 g of nicotine (a nonelectrolyte) in water to make 12 mL of solution. The osmotic p
    5·1 answer
  • Weighted averages, help please
    5·1 answer
  • Match the element with its description. Match Term Definition Lithium A) Highly reactive gas Lead B) Nonreactive gas Fluorine C)
    12·1 answer
  • How much energy (in joules) is released when 0.06 kilograms of mercury is condensed to a liquid at the same temperature? A. 51,3
    7·2 answers
  • Typical residential shower controls mix streams of hot water (140 F, or 60 C) with cold water (60 F, or 15 C) to form a stream o
    5·1 answer
  • 1. Calculate the concentration of hydronium ion of both buffer solutions at their starting pHs. Calculate the moles of hydronium
    5·1 answer
  • Please help on question 7 and 8<br>​
    12·1 answer
  • A penny is 0.061 inches thick. What is the value of the 6 in the thickness of a penny? Mathematics not chemistry
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!