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MakcuM [25]
3 years ago
15

Which temperatures are equal? (Refer to the diagram of the thermometer in the lesson.)

Chemistry
2 answers:
ella [17]3 years ago
4 0

Answer:

d

Explanation:

Olegator [25]3 years ago
4 0

Answer: 212 F/100 C and 32 F/0 C... hope I helped you! Have a great rest of your day.

Explanation:

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How many moles of hydrogen are required to make 32 moles of water?
NNADVOKAT [17]
You multiply 32 by 2, since there are two hydrogens in every water molecule.
7 0
3 years ago
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19. What is the density of a 16.39
slavikrds [6]
Density= mass/volume

16.39g/18.00mL = 0.9105 g/mL
Make sure to use the correct number of significant figures (4)
7 0
3 years ago
Three common ores of iron are FeO, Fe2O3, and Fe3O4. Iron ores are often reduced to elemental iron by heating in the presence of
brilliants [131]

Answer:

Answers are explained below

Explanation:

(a)

Oxidation number of iron :

FeO = +2

Fe2O3= +3

Fe3O4 = +2 and +3 since Fe3O4 is the mixture of FeO and Fe2O3.

(b) FeO + CO ----> Fe (s) + CO2

(c) In a pure iron metallic bond is exist between the particles of Fe. But in the form of ore metals forms ionic bond with the non-metals.

Hence the properties vary.

Yes carbon steel has greater strength than that of pure iron but retains the property of iron because no chemical reaction occurs between carbon and iron.

d)

Mixing of carbon in iron is a type of physical change since there is no chemical reactions occur between the carbon and iron. Carbon atoms diffuses in the place between the iron atoms.

(f) One of the property of non-metals are brittleness. It is non ductile .

So when the percentage of carbon increases its atoms also occupying more and more free places.

And increasing the brittleness. So the iron becomes less ductile.

e)

6 0
3 years ago
Calculate the pH of lemon juice to three significant figures, with a hydrogen ion concentration of
Airida [17]

Answer:

pH = - log [2.12 x 10^-3]

what is the log of 2.22 x 10^-3]

Take the opposite of that,

That is the pH, now, just make certain you use the correct significant figures.

Explanation:

3 0
3 years ago
Which of the following statements is true regarding hybridization?Hybridization occurs in plants more often than in animals.Hybr
olya-2409 [2.1K]
<h2>Answer:</h2>

The correct answer is option A which is hybridization occurs in plants more often than in animals.

<h3>Explanation:</h3>
  • Hybridization means mixing of different things.
  • In the context of biology, hybridization means the mixing of genetic material of the two dissimilar species. The resulting offspring is known as the hybrid.
  • In the case of animals, they are usually infertile as a mule, a hybrid of donkey and horse.
  • Hybridization always involves interspecies mating. And sometimes the natural selection is in favor of hybridization.
  • In plants, it is very common which is also known as crossbreeding and different types of plants and fruits are produced by this method.
  • Hence the correct option is A.
7 0
3 years ago
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