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Brilliant_brown [7]
3 years ago
10

Which of these describes Busan?

Chemistry
2 answers:
Ilya [14]3 years ago
5 0

The answer for this question is B.

iren [92.7K]3 years ago
4 0

The correct answer is C. The largest port city in South Korea located on the southern tip of the Korean Peninsula

Explanation:

Busan is an important city in South Korea, which is an Asiatic country located in the east of the continent. This city is the most important in the country after Seoul, which is the capital city. Moreover, this city is relevant because it acts as one of the most important ports in South Korea, which makes this city an important trade center. Besides this, in terms of geographical location, Busan is located in the south of the Korean Peninsula that includes both South Korea and North Korea. Thus, the statement that describes Busan is "The largest port city in South Korea located on the southern tip of the Korean Peninsula".

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Which contains 3 significant figures.
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B, E, F have 3 significant figures
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What kind of chemical change involves breaking down substances using electricity?
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The chemical change that involves breaking down substances using electricity is C. Electrolysis.
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2. What's the kinetic energy of an object that has a mass of 12 kilograms and moves with a velocity of 10 m/s?
Dennis_Churaev [7]
<h2>Let us solve for it </h2>

Explanation:

Energy

It is ability to do work .

There are so many forms of energy .

out of which mechanical energy is also one of the form .

Mechanical energy

It is the energy possessed by the body by virtue of its motion and state .

It is of two types :

  • Kinetic energy
  • Potential energy

Kinetic energy

It is the energy possessed by the body by virtue of its motion .

Its expression is :

K.E=1/2mv²

Here in above question it is given that :

mass = 2Kg

V=10m/sec

K.E will be = 1/2 x 2 x 10 x 10

K.E=100 J

8 0
3 years ago
Which iron pot has the least thermal energy?
Yuki888 [10]

Answer:

B

Explanation:

4 0
3 years ago
3H2 + N2 —&gt; 2NH3 .
In-s [12.5K]

Answer:

\boxed{1.26 \times 10^{20} \text{ molecules NH}_{3}}

Explanation:

We will need a balanced chemical equation with masses, moles, and molar masses.

1. Gather all the information in one place:

M_r:      2.016                 17.03

              3H₂   +   N₂ ⟶ 2NH₃

m/g:  6.33 × 10⁻⁴  

2. Calculate the moles of H₂

\text{Moles of H}_{2} = 6.33 \times 10^{-4}\text{ g H}_{2} \times \dfrac{\text{1 mol H}_{2}}{\text{2.016 g H}_{2}} = 3.140 \times 10^{-4} \text{ mol H}_{2}

3. Calculate the moles of NH₃

The molar ratio is 2 mol NH₃/3 mol H₂.

\text{Moles of NH}_{3} = 3.140 \times 10^{-4} \text{ mol H}_{2} \times \dfrac{\text{2 mol NH}_{3}}{\text{3 mol H}_{2}} = 2.093 \times 10^{-4}\text{ mol NH}_{3}

4. Calculate the molecules of NH₃

There are 6.022 × 10²³ molecules of NH₃/1 mol NH₃.

\text{Molecules of NH}_{3} = 2.093 \times 10^{-4}\text{ mol NH}_{3} \times \dfrac{6.022 \times 10^{23}\text{ molecules NH}_{3}}{\text{1 mol NH}_{3}}\\= 1.26 \times 10^{20}\text{ molecules NH}_{3}\\\text{The reaction produces } \boxed{\mathbf{1.26 \times 10^{20}} \textbf{ molecules NH}_{3}}

3 0
3 years ago
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