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
dezoksy [38]
2 years ago
10

Magnesium oxidizes via the reaction: 2 Mg + O2 → 2 MgO The reaction has a △Hrxn = -1203 kJ. How much heat (in kJ) is released wh

en you completely react 3.000 moles of O2?
Chemistry
1 answer:
Juli2301 [7.4K]2 years ago
3 0

Answer : The amount of heat released is, -3609 KJ

Solution : Given,

Enthalpy of reaction, \Delta H_{rxn} = -1230 KJ

Moles of O_2 = 3 moles

The given balanced reaction is,

Mg+O_2\rightarrow 2MgO

From the balanced reaction we conclude that

1 mole of O_2 releases heat = -1230 KJ

3 moles of O_2 releases heat = \frac{3moles}{1mole}\times -1230KJ=-3609KJ

Therefore, the amount of heat released is, -3609 KJ

You might be interested in
Choose the correct name for each acid. Click here
Zigmanuir [339]

Answer:

1. Nitrous Acid

2. Hydroiodic Acid

3. Phosphoric Acid

Explanation:

Just did the lesson

7 0
3 years ago
Read 2 more answers
What is the limiting factor in determining the accumulation of siliceous ooze/calcareous ooze, respectively?
zhannawk [14.2K]

Answer:

productivity and water depth

Explanation:

The productivity and the depth of water are both equally important as it directly affects the accumulation of biogenic sediments such as the siliceous ooze and calcareous ooze. In the equator and the coastal upwelling areas, and at the site of divergence of oceans, there occurs a high rate and amount of productivity, and these are considered to be the primary productivity.  

The siliceous oozes are a good indicator of extensively high productivity in comparison to the carbonate oozes. The main reason behind this is that the silica can be easily dissolved in the surface water. On the other hand, the carbonates dissolve at a relatively lower ocean water depth, so there requires a high amount of surface productivity in order to allow these siliceous oozes to reach the ocean bottom.

Thus, the water depth and productivity, both are considered as the limiting factor in determining the accumulation of biogenic oozes.

8 0
2 years ago
The following exothermic reaction is allowed to reach equilibrium. What
Anon25 [30]
The answer is gonna be the last one :)
5 0
2 years ago
A rectangular block has the following dimensions: 3.21 dm, 5.83 cm, and 1.84 in. The block has a mass of 1.94 kg. What is the de
spin [16.1K]

The density of the rectangular block in g/mL is 7.0.

<u>Given the following data:</u>

  • Mass of block = 22.8 gra1.94 kg
  • Length of block = 3.21 cm
  • Width of block = 5.83 cm
  • Height of block = 1.84 in.

To find the density of the block in g/mL:

First of all, we would determine the volume of the rectangular block by using the following formula:

Volume = length × width × height

<u>Conversion:</u>

1 in = 2.54 cm​

5.83 in = X cm

Cross-multiplying, we have:

X = 2.54(5.83)\\\\X = 14.81 \; cm

Volume = 3.21 × 5.83 × 14.81

Volume = 277.16 cubic centimeters.

<u>Note</u>: Milliliter (mL) is the same as cubic centimeters.

1000 grams = 1 kg

Y grams = 1.94 kg

Cross-multiplying, we have:

Y = 1940 grams

Now, we can find the density:

Density = \frac{Mass}{Volume}\\\\Density = \frac{1940}{277.16}

<em>Density </em><em>= 7</em><em>.0 g/mL</em>

Therefore, the density of the rectangular block in g/mL is 7.0.

Read more: brainly.com/question/18320053

4 0
2 years ago
Which of the following processes are physical changes?
Stolb23 [73]
C) and d) are physical changes while b) is chemical
7 0
2 years ago
Read 2 more answers
Other questions:
  • At what temp will a gas be at if you allow it to expand from an original 456 mL to 65°C to 3.4 L
    11·2 answers
  • Which conditions are likely to follow the current conditions in the area? Select three responses.
    6·2 answers
  • A gas of unknown pressure is contained in a vertical cylinder with a piston, of mass 1.1 kg and diameter 10.0 cm. The piston is
    12·1 answer
  • State 3 characteristics of a temporary physical change<br>​
    10·1 answer
  • How many grams of salt are in 5 L of a solution with a concentration of 3 g/L
    8·1 answer
  • Pepper is trying to determine the density of her gold ring. The ring’s mass is 100 grams and the volume displaced by the ring is
    14·1 answer
  • Why is the finance charge important to consider when shopping for credit?
    6·1 answer
  • What is the molar mass of the anhydrous compound? Answer using four significant figures.
    10·2 answers
  • What is the conclusion of Rutherford atomic model?​
    10·1 answer
  • Matthew added a sample of sodium chloride to water and
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!