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4 years ago

CHEMISTRY HELP !?????

Chemistry

1 answer:

zheka24 [161]4 years ago

8 0

3. Plasma

- indefinite shape & volume

- affected by magnetic and electric field

- drift and flow freely

4. Liquids have fixed volume meaning packed tighter together as gases do not have fixed shape or volume .

D would be correct

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SC1^2 iconic or covalent

yulyashka [42]

Answer:

Covalent

Explanation:

Sulfur and Chlorine are non metals so if they combine, they become covalent.

4 0

3 years ago

Light waves travel much__________________________________ than sound waves.

LUCKY_DIMON [66]

Yeah, a lot faster than sound.

3 0

3 years ago

How many atoms are in 4H3BO3

maksim [4K]

1 mole of h3bo3...........6.023*10²³ each h and B and 0 so we will have 3hydrogen+ 1 B+3 oxygen = 7*6.023*10²³ atoms

1 mole .......7*6.023*10²³atoms

4 moles ........x atoms

x=4*7*6.023*10²³.

3 0

3 years ago

Which of the following elements has the largest atomic radius?

Pachacha [2.7K]

Answer:

nitrogen

Explanation:

as the group number increases, the atomic radius decreases

3 0

3 years ago

a 1.25g sample of ore containing iron pyrite (FeS2) was pulverized and ignited in air, converting the FeS2 to Fe2O3 and SO2(g).

svp [43]

Answer:

28.9%

Explanation:

Let's consider the following balanced equation.

2 FeS₂ + 11/2 O₂ ⇒ Fe₂O₃ + 4 SO₂

We can establish the following relations:

The molar mass of Fe₂O₃ is 159.6 g/mol
1 mole of Fe₂O₃ is produced per 2 moles of FeS₂
1 mole of Fe is in 1 mole of FeS₂
The molar mass of Fe is 55.84 g/mol

The amount of Fe in the sample that produced 0.516 g of Fe₂O₃ is:

$0.516gFe_{2}O_{3}.\frac{1molFe_{2}O_{3}}{159.6gFe_{2}O_{3}} .\frac{2molFeS_{2}}{1molFe_{2}O_{3}} .\frac{1molFe}{1molFeS_{2}} .\frac{55.84gFe}{1molFe} =0.361gFe$

The percent of Fe in 1.25 g of the ore is:

$\frac{0.361g}{1.25g} .100\%=28.9\%$

4 0

3 years ago