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qwelly [4]
3 years ago
9

Use what you have learned to match the parts of the

Chemistry
1 answer:
andre [41]3 years ago
6 0

Answer:

the crust is the outermost layer

Explanation:

the mantle is under the crust, the core is the innermost layer

land and water.is for crust-mantle. contain semi-molten iron and nickel please make the question clear

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Describe how an acidic solution forms when HCHIS
kakasveta [241]
The presence of H3O+ is the hydronium ion, and one definition of an acid is something that donates a proton (H+). HCl in this case does just that. Basic solution forming with NaOH and water: ... NaOH + H2O ==>Na+ + OH- so it donates or produces OH- ions, thus making a basic solution
6 0
4 years ago
10. Is the identity of an element determined by its mass number or atomic number?<br> By omak
SpyIntel [72]

Answer:

atomic number

Explanation:

mass is determined by the protons and neutrons

5 0
3 years ago
Calculate the concentration (in m) of hydroxide ions in a solution at 25. 0 °C with a poh of 3. 58.
Reika [66]

The concentration (in M) of hydroxide ions in a solution at 25°C with a pOH of 3.58 is 2.6 × 10⁻⁴ M.

pOH is the measure of basic nature of a solution by evaluating the [OH⁻] concentration.

It is the negative logarithm of the hydroxide ion concentration.

Given,

pOH = 3.58

Temperature = 25°C = 298K

At 25°C, the relation of pOH and [OH⁻] concentration is as follows:

∴ pOH = -log [OH⁻]

⇒ 3.58 = -log [OH⁻]

⇒log [OH⁻] = -3.58

⇒ [OH⁻] = antilog (-3.58)

⇒[OH⁻] = 2.6 × 10⁻⁴ M

The concentration (in m) of hydroxide ions in a solution at 25.0 °C with a pOH of 3. 58 is 2.6 × 10⁻⁴ M.

Learn more about pOH here, brainly.com/question/17144456

#SPJ4

3 0
2 years ago
PLEASE HELP!! WILL MARK BRAINLIEST
Andrew [12]

Answer:

The answer to your question is below

Explanation:

                                         Trial 1                   Trial 2

mass of Mg                      0.255 g                0.353 g

mass of MgO                   0.418 g                 0.576 g

Chemical reaction

                                2Mg(s)    +  O₂(g)     ⇒   2MgO(s)

Question 1.

Atomic mass of Mg = 24.31 x 2 = 48.62 g

Molecular mass of MgO = 2(24.31 + 16) = 80.62 g

Trial 1

                          48.62 g of Mg ----------------- 80.62 g of MgO

                          0.255 g            ----------------   x

                          x = (0.255 x 80.62)/48.62

                          x = 0.422 g of MgO

Trial 2                48.62 g of Mg ----------------- 80.62 g of MgO

                          0.353 g            ----------------   x

                          x = (0.353 x 80.62)/48.62

                          x = 0.585 g of MgO

Question 2

Trial 1          

Percent yield = 0.418/0.422 x 100 = 99%

Trial 2

Percent yield = 0.576/0.585 x 100 = 98.5%

Question 3

Average = (99 + 98.5)/2

              = 98.75%

3 0
3 years ago
All atoms of a given element have the same number of____
maksim [4K]
<h3>Answer:</h3>

Protons

<h3>Explanation:</h3>
  • An atom is the smallest particle of an element that can take part in a chemical reaction.
  • All atoms of the same element are similar in that they have the same number of protons.
  • Atoms of the same elements may have a different number of electrons or neutrons but will always have the same number of protons.
  • Atoms of the same elements with a different number of neutrons are known as isotopes.
  • When neutral atoms gain or lose electron(s) they form charged atoms known as ions.
3 0
4 years ago
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