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Veseljchak [2.6K]

3 years ago

13

Warm air and water both tend to rise while cooler air and water sink. When different parts of the oceans are heated unevenly, th

is causes the water to
a.move in convection currents
b.form a tsunami.
c.stay in the same place.
d.mix together in the water cycle.

1 answer:

ale4655 [162]3 years ago

3 0

Answer:

a

Explanation:

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Answer:

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How do i find the square root of a number

DochEvi [55]

Answer:

Using the Guess Method

Explanation:

Finding the square root of a number is an automatic action in tools such as calculator and Excel without any rationale behind it. Hence, I find it more useful to describe as I learned at school: the guess and approach method (it can go by various other names).

The square root of a number is ‘a number which produces a specified quantity when multiplied by itself’.

The Guess Method is guessing that number by approximation until getting exactly the right one.

For example, we want to know the square root of, let’s say, 144. We know that 10*10 is 100. That’s close. Let’s add 1 to that. 11*11 is 121. Getting closer! 12*12 is… 144! Right on! Therefore, the square root of 144 is 12.

I used that technique every time I had to do the math by hand, no matter the number. I thought of a number that could be somewhat close enough (I would guess! Got the method name now? Lol) and adjust until I got my answer right.

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3 years ago

Write a balanced half-reaction for the oxidation of gaseous nitric oxide NO to nitrate ion NO−3 in acidic aqueous solution. Be s

crimeas [40]

Answer:

$2H_2O(l)+NO(g)\rightarrow NO_3^-(aq) +4H^+(aq)+3e^-$

Explanation:

Hello there!

In this case, according to the given information, it turns out possible to set up the initial version of the half-reaction as follows:

$NO\rightarrow NO_3^-$

Now, we assign the oxidation numbers to both nitrogen atoms:

$N^{2+}O\rightarrow N^{5+}O_3^-$

It means three electrons are carried, two water molecules are needed on the left side in order to balance the oxygen atoms and consequently four hydronium ions to balance hydrogen atoms in acidic media:

$2H_2O(l)+NO(g)\rightarrow NO_3^-(aq) +4H^+(aq)+3e^-$

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2 years ago

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marishachu [46]

Answer:

23.6 moles

Explanation:

From the question given above, the following data were obtained:

Mass of air = 3.6 Kg

Mass percentage of O₂ = 21%

Number of mole of O₂ =?

Next, we shall convert 3.6 Kg of air to grams (g). This can be obtained as follow:

1 kg = 1000 g

Therefore,

3.6 Kg = 3.6 Kg × 1000 / 1 kg

3.6 Kg = 3600 g

Next, we shall determine the mass of O₂ in the air. This can be obtained as follow:

Mass of air = 3600 g

Mass percentage of O₂ = 21%

Mass of O₂ =?

Mass of O₂ = 21% × 3600

Mass of O₂ = 21/100 × 3600

Mass of O₂ = 756 g

Finally, we shall determine the number of mole of O₂ in the sample of air. This can be obtained as follow:

Mass of O₂ = 756 g

Molar mass of O₂ = 2 × 16 = 32 g/mol

Number of mole of O₂ =?

Mole = mass /Molar mass

Number of mole of O₂ = 756 / 32

Number of mole of O₂ = 23.6 moles

Thus, the number of mole of O₂ in the

sample of air is 23.6 moles

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2 years ago

One of the most recognizable corrosion reactions is the rusting of iron. rust is caused by iron reacting with oxygen gas in the

zloy xaker [14]

Answer: $Fe(s) + 6H_2O(l) + 3O_2(g) -> 4Fe(OH)_3(s)$

Explanation:

The Chemical equation for the formation of rust is:

Iron + Water + Oxygen ----> Rust

4 Fe(s) + 6 H2O(l) + 3 O2(g) → 4 Fe(OH)3(s)

The Iron Hydroxide However dehydrates to produce Fe2O3 * nH2O

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3 years ago

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