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
Veseljchak [2.6K]
3 years ago
8

D

Chemistry
1 answer:
boyakko [2]3 years ago
4 0

Answer:

My conclusion about the picture above. Is cleaning or arrange all things in the kitchen is one of the reason to avoid us in danger.The things that we can prevent danger in the kitchen always clean the kitchen room,things especially to a hazard things.

burning is one of danger things that happrn in the kitchen.

You might be interested in
One reaction involved in the conversion of iron ore to the metal is FeO(s) + CO(g) → Fe(s) + CO2(g) Use Hess’s Law to calculate
Ugo [173]

Answer:

\delta H_{rxn} = -66.0  \ kJ/mole

Explanation:

Given that:

3FeO_3_{(s)}+CO_{(g)} \to 2Fe_3O_4_{(s)} +CO_{2(g)} \  \ \delta H = -47.0 \ kJ/mole  -- equation (1)  \\ \\ \\ Fe_2O_3_{(s)} +3CO_{(g)} \to 2FE_{(s)} + 3CO_{2(g)}  \ \ \delta H = -25.0 \ kJ/mole  -- equation (2)  \\ \\ \\ Fe_3O_4_{(s)} + CO_{(g)} \to 3FeO_{(s)} + CO_{2(g)} \ \delta H = 19.0 \ kJ/mole  -- equation (3)

From equation (3) , multiplying (-1) with equation (3) and interchanging reactant with the product side; we have:

3FeO_{(s)} + CO_{2(g)}    \to    Fe_3O_4_{(s)} + CO_{(g)}   \ \delta H = -19.0 \ kJ/mole  -- equation (4)

Multiplying  (2) with equation (4) ; we have:

6FeO_{(s)} + 2CO_{2(g)}    \to    2Fe_3O_4_{(s)} + 2CO_{(g)}   \ \delta H = -38.0 \ kJ/mole  -- equation (5)

From equation (1) ; multiplying (-1) with equation (1); we have:

2Fe_3O_4_{(s)} +CO_{2(g)} \to     3FeO_3_{(s)}+CO_{(g)}   \  \ \delta H = 47.0 \ kJ/mole  -- equation (6)

From equation (2); multiplying (3) with equation (2); we have:

3 Fe_2O_3_{(s)} +9CO_{(g)} \to 6FE_{(s)} + 9CO_{2(g)}  \ \ \delta H = -75.0 \ kJ/mole  -- equation (7)

Now; Adding up equation (5), (6) & (7) ; we get:

6FeO_{(s)} + 2CO_{2(g)}    \to    2Fe_3O_4_{(s)} + 2CO_{(g)}   \ \delta H = -38.0 \ kJ/mole  -- equation (5)

2Fe_3O_4_{(s)} +CO_{2(g)} \to     3FeO_3_{(s)}+CO_{(g)}   \  \ \delta H = 47.0 \ kJ/mole  -- equation (6)

3 Fe_2O_3_{(s)} +9CO_{(g)} \to 6FE_{(s)} + 9CO_{2(g)}  \ \ \delta H = -75.0 \ kJ/mole  -- equation (7)

<u>                                                                                                                      </u>

FeO  \ \ \ +  \ \ \ CO   \ \  \to   \ \ \ \ Fe_{(s)} + \ \ CO_{2(g)} \ \ \  \delta H = - 66.0 \ kJ/mole

<u>                                                                                                                     </u>

<u />

\delta H_{rxn} = \delta H_1 +  \delta H_2 +  \delta H_3    (According to Hess Law)

\delta H_{rxn} = (-38.0 +  47.0 + (-75.0)) \ kJ/mole

\delta H_{rxn} = -66.0  \ kJ/mole

8 0
3 years ago
What happens if a geologist drips a small amount of vinegar (acetic acid) onto a sample of dolomite?
Lapatulllka [165]
Hydrochloric acid on a rock or mineral and watching for bubbles of carbon dioxide gas to be released. The bubbles signal the presence of carbonate minerals such as calcite and dolomite.
4 0
4 years ago
Whats the si unit chemist use to measure the amount of an element substance?
Westkost [7]
The SI unit for the amount of substance present is the mole.

The mole is defined as the amount of substance that has the same amount of particles as there are atoms in 12 grams of carbon-12. Mathematically, the moles of a substance may be computed using:

moles present = mass of substance / molecular mass of substance
4 0
3 years ago
Two sound waves are emitted from identical sources at the same time. They each travel a distance of 10 m, but one wave reaches t
kompoz [17]

Answer:

<em>Varying frequency</em> between both waves accounts for difference in speed.

Explanation:

The speed of a wave is dependent on four major factors:

  1. wavelength
  2. frequency
  3. medium, and
  4. temperature 

Assuming equal temperature and medium of travel of these sound waves, and given that the wavelength (that is distance of travel) is equal, the only varying factor would be their frequency.

Wave speed is calculated by multiplying the wavelength times the frequency

⇒ Speed = λ * <em>f</em>

4 0
3 years ago
Read 2 more answers
How many moles are in 6 x 10^23 molecules of H2O
goldfiish [28.3K]
One mole represents 6.022∙1023 separate entities, just like one dozen represents 12 objects. So, if there are 6.022∙1023 H2O molecules, that is the same as one mole of water.
7 0
3 years ago
Other questions:
  • What phases (solid, liquid, gas) are present in the unlighted candle? In the burning candle? Which phase appears to take part in
    8·2 answers
  • Can someone help me complete this chart down below? (READ CAREFULLY)
    13·1 answer
  • How does the law of conservation of mass apply to this reaction: C2H4 + O2 → H2O + CO2?
    8·2 answers
  • Table C: Known Specific Heat Values for Common
    8·2 answers
  • Under the same conditions of temperature and pressure a liquid differs from a gas because the particles of the liquid
    13·2 answers
  • Why are vitamins and minerals are not classified as a food?
    7·1 answer
  • During the process of succession,
    14·2 answers
  • What are tiny cell structures that carry out specific functions within the cell?​
    14·1 answer
  • Do bacteria help people?? This is science but there is no tab
    10·1 answer
  • The theoretical yield of zinc oxide in a reaction is 486 g. what is the percent
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!