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3 years ago

True or False:

Chemistry

2 answers:

bezimeni [28]3 years ago

7 0

The answer is B, false

Debora [2.8K]3 years ago

5 0

B, false because it's pretty much still water, you melt the ice and it'll turn back to water so that's only a physical change

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If you reacted 93.7 grams of iron with excess copper sulfate solution, what mass of copper would you expect to make? you may nee

Mariana [72]

Answer is although the question should have 3 significant figures.

<h3>What is significant figures?</h3>

Chemical equation

Fe + CuSO4 --> Cu + FeSO4

It is already balanced

Molar ratios

1 mol Fe : 1 mol CuSO4 : 1 mol Cu : 1 mol FeSO4

atomic masses of Fe and Cu

Fe: 55.8 g/mol

Cu: 63.5 g/mol

number of moles of Fe

number of moles = mass in grams / atomic mass = 93.7 g / 55.8 g/mol = 1.679 mol

number of moles of Cu:

1 mol Fe / 1 mol Cu => 1.679 mol Fe / 1.679 mole Cu

mass of Cu in 1.679 moles Cu

mass = atomic mass * number of atoms = 63.5 g/mol * 1.679 moles = 106.6 g = 107 rounded to 3 significant figures.

To learn more about significant figures, refer to:

brainly.com/question/24491627

#SPJ4

3 0

2 years ago

Which of the following examples best represent the levels of organization from least to most complex in humans

Anika [276]

I’d say C not sure though

5 0

2 years ago

For the following reaction, 0.511 moles of sulfuric acid are mixed with 0.464 moles of zinc hydroxide. What is the formula for t

kkurt [141]

Answer:

Zinc hydroxide, Zn(OH)₂ is the limiting reactant.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

H₂SO₄ + Zn(OH)₂ —> ZnSO₄ + 2H₂O

From the balanced equation above,

1 mole of H₂SO₄ reacted with 1 mole of Zn(OH)₂.

Finally, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above,

1 mole of H₂SO₄ reacted with 1 mole of Zn(OH)₂.

Therefore, 0.511 mole of H₂SO₄ will also react with 0.511 mole of Zn(OH)₂.

From the calculation made above, we can see that it will take a higher amount (i.e 0.511 mole) of Zn(OH)₂ than what was given (i.e 0.464 mole) to react completely with 0.511 mole of H₂SO₄.

Therefore, Zn(OH)₂ is the limiting reactant and H₂SO₄ is the excess reactant.

3 0

3 years ago

The lower the pH level, the more acidic the solution<br><br> True or False?

Semenov [28]

Answer:True

Explanation:

3 0

3 years ago

Read 2 more answers

Argon has a completely filled p sublevel, giving it chemical stability. Potassium has one electron in the 4s sublevel and can ea

Stels [109]

Potassium has one electron in the 4 s sublevel and can easily lose this electron, so it has a low first ionization energy.

Therefore, it lose the 4 s electron to achieve an Argon electron configuration, giving it the added stability of the filled p sublevel.

The ionization energy (Ei) is the minimum amount of energy required to remove the valence electron, when element lose electrons, oxidation number of element grows (oxidation process).

Potassium has lowe first ionization energy, so potassium easier remove one valence electron (4s¹).

Electron configuration of potassium is: ₁₉K 1s²2s²2p⁶3s²3p⁶4s¹.

Electron configuration of argon atom: ₁₈Ar 1s² 2s² 2p⁶ 3s² 3p⁶.

6 0

3 years ago