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
soldier1979 [14.2K]
2 years ago
7

Short Response

Chemistry
1 answer:
Natalija [7]2 years ago
8 0

Answer:

6.)

7.)  134.4 g O₂

Explanation:

The unbalanced equation:

NH₃ (g) + O₂ (g) ---> N₂ (g) + H₂O (g) + energy

<u>Reactants</u>: 1 nitrogen, 3 hydrogen, 2 oxygen

<u>Products</u>: 2 nitrogen, 2 hydrogen, 1 oxygen

The balanced equation:

4 NH₃ (g) + 3 O₂ (g) ---> 2 N₂ (g) + 6 H₂O (g) + energy

<u>Reactants</u>: 4 nitrogen, 12 hydrogen, 6 oxygen

<u>Products</u>: 4 nitrogen, 12 hydrogen, 6 oxygen

To convert from moles to grams, you need to multiply the starting value (4.2 moles) by the molar mass (32.00 g/mol). The molar mass can serve as a conversion because it technically means there are 32.00 grams O₂ per every 1 mole. It is important to arrange this ratio in a way that allows for the cancellation of units (the desired unit should be in the numerator).

4.2 moles O₂          32.00 g
--------------------  x  ----------------  =  134.4 g O₂
                                1 mole

You might be interested in
A standard lanthanum solution is prepared by dissolving 0.1968 grams of lanthanum oxide (La2O3) in excess nitric acid and diluti
sweet-ann [11.9K]

Answer:

1.208x10⁻³M and 392.5ppm La(NO3)3

Explanation:

The reaction that occurs is:

La2O3 + 6HNO3 → 2La(NO3)3 + 3H2O

Molarity is defined as the moles of solute (In this case, LaO3) per liter of solution. And ppm, are mg of solute per liter of solution.

To solve this question we must find the moles of La(NO3)3 produced and its mass in milligrams to find molarity and ppm:

<em>Moles La2O3 -Molar mass: 325.81g/mol-</em>

0.1968g * (1mol / 325.81g) = 6.04x10⁻⁴ moles La2O3

<em>Moles La(NO3)3:</em>

6.04x10⁻⁴ moles La2O3 * (2mol La(NO3)3 / 1mol La2O3) = 1.208x10⁻³ moles La(NO3)3

<em>Molarity:</em>

1.208x10⁻³ moles La(NO3)3 / 1L =

<h3>1.208x10⁻³M</h3>

<em>Mass La(NO3)3 -Molar mass: 324.92g/mol-</em>

1.208x10⁻³ moles La(NO3)3 * (324.92g / mol) = 0.392.5g La(NO3)3

In mg:

392.5mg La(NO3)3 / 1L =

392.5ppm La(NO3)3

7 0
3 years ago
How surface area affects the rate of a reaction.
alexandr402 [8]
The smaller the surface area, the faster the rate of reaction will be. Think of ice. A full sized ice cube will take longer to melt than crushed ice. Crushed ice will melt much quicker because there is more surface area exposed. So if the surface area can be increased, so will the rate of reaction.

Hope this helps! :)
8 0
3 years ago
Magda drew a figure on a coordinate plane below.
barxatty [35]
D. She rotated the figure 180 degrees about the origin
7 0
3 years ago
Question 1 Is the following question true or false All of today's continents were part of one large land mass 225 million years
cupoosta [38]


Question 1 is true because it was called Pangea

Question 2 is false because it had a lot of impact on the distribution of species, before the moving continents animals could roam where ever they want but after the splitting of the continents the species were stuck in one place because water separated other continents and land species cant swim.

7 0
3 years ago
Read 2 more answers
Which element has properties most similar to those of chromium? Why?
Ludmilka [50]

Answer:

Answer : Molybdenum (Mo) and Tungsten (W)

Explanation:

because their properties are similar to that of Chromium (Cr) because it belongs to group 6 in the modern periodic table.

3 0
3 years ago
Other questions:
  • Why do crocodiles walk so gayly?
    6·1 answer
  • A boy fell off a 100 foot ladder. But he did not get hurt. Why not?
    12·2 answers
  • Which of the following materials is a metalloid or semi-metal (has some metallic properties and some properties similar to non-m
    11·1 answer
  • Write a balanced chemical equation for the complete combustion of C3H7BO3, a gasoline additive. The products of combustion are C
    15·1 answer
  • Which volcanoes are located on a diverging boundaries
    12·1 answer
  • Name the following inorganic compounds:
    10·1 answer
  • What is the oxidation number of carbon in the compound carbon dioxide, CO2?
    10·1 answer
  • What do you think are the necessary skills needed by scientists to solve a particular problem?
    6·1 answer
  • Which substance would retain the most heat for the longest period of time?
    8·2 answers
  • What is the main limitation of using renewable energy sources?.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!