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3 years ago

When we experience higher than normal low tides and lower than normal high tides we are experiencing?

Chemistry

2 answers:

DanielleElmas [232]3 years ago

3 0

Answer: a full or new moon

Explanation:

MissTica3 years ago

3 0

(doesn't sound too smart)

We're experiencing the moon changing positions.

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Вывести формулу оксигенсодержащего соединения, если массовая доля карбона в нем 52,2%, а гидрогена 13%

satela [25.4K]

No depot wey sorrey jauja ]>

6 0

2 years ago

Some covalent compounds contain atoms of just one element. true or false?

kifflom [539]

True, because diatomic elements (H2, O2, F2, Br2, I2, N2, Cl2) consist of only one element but are molecules with covalent bonds.

6 0

3 years ago

a gas in a container with a fixed volume was originally at a pressure of 317kpa and a temperature of 154k. what is the new press

goldfiish [28.3K]

<h2>Hello!</h2>

The answer is: 4.77atm

Since there's a fixed volume, we can use the the Gay-Lussac's Law which stablish a relation between the pressure and the temperature:

$\frac{P}{T}=k$

<em>P</em> is the volume of the gas

<em>t</em> is the temperature of the gas

<em>k </em>is the proportionality constant

We also have the following equation:

$\frac{P1}{T1}=\frac{P2}{T2}$

Where:

$P2=\frac{P1*T2}{T1}=\frac{317kPa*235K}{154K}=483.73kPa$

We are asked to find the pressure in atm, so we must convert 483.73kPa to atm:

$1kPa=0.009869atm$

Then,

$483.733kPa*\frac{0.009869atm}{1kPa}=4.77atm$

Have a nice day!

8 0

3 years ago

calcium is obtained industrially by electrolysis of molten cacl2 and is used in aluminum alloys. how many coulombs are needed to

Vinvika [58]

It takes 107 minutes 22 seconds and 96500 coulombs of charge produce 20.2 g of calcium.

The balanced equation for the reaction is,

$CaCl _{2} \:→ \: Ca ^{ 2 + } + 2Cl {}^{ - }$

The half-reaction of calcium is,

$Ca ^{2 + } + 2e ^{ - } → \: Ca$

Mass of calcium = 20.2 g

The molecular mass of calcium = 40 u.

The number of moles calcium are,

$Number \: of \: moles = \frac{mass}{molecular \: mass}$

$= \frac{20.2}{40}$

$= 0.5 \: moles$

One mole of Calcium is produced by 2 moles of electrons.

So, 0.5 moles of Calcium produce,

$= 0.5 \times 2$

$= 1 \: mole \: of \: electron$

The charge required to produce 202 g of calcium is,

$= 1 \:F$

$= 1 \times 96500 \: C$

$= 96500 \: C$

Current = 15 A

The time taken to produce 20.2 g of calcium is,

$I = \frac{Q}{T}$

$T = \frac{96500}{15}$

$= 6433.3 \: s$

$= 107 \: minutes \: 22 \: seconds$

Therefore, 96500 columns of charge are required to produce 20.2 grams of calcium. And it takes 107 minutes and 22 seconds.

To know more about charge, refer to the below link:

brainly.com/question/14713274

#SPJ4

7 0

1 year ago

How many mols are present in the a sample of silver nitrate which has<br> 5.3x10^24 molecules.

Westkost [7]

Answer: 5.3 x 10^24 formula units of silver nitrate is equivalent to 8.8 moles of silver nitrate. Silver nitrate is an ionic compound, therefore, its representative particle is called a "formula unit" instead of molecule. For every mole of a substance, we know that there are 6.022 x 10^23 representative units of that substance. The amount of particles in one mole of substance is called Avogadro's number.

Further Explanation:

We can convert from number of representative particles to moles using the formula:

$\boxed {no. \ of \ moles \ = \ ( given \ no. \ of \ particles) \ (\frac{1 \ mole}{\ 6.022 \ x 10^{23} particles})}$

For this problem, we can calculate the number of moles by plugging in the given values to the equation above,

$no. \ of \ moles \ = (5.3 \ x \ 10^{24} \ formula \ units \ AgNO_{3}) \ (\frac{1 \ mole \ AgNO_{3}}{6.022 \ x 10^{23} \ formula \ units AgNO_{3}}) \\\\\boxed {no. \ of moles \ AgNO_{3} \ = \ 8.8 \ moles}$

Learn More

Learn more about representative particles brainly.com/question/8969313
Learn more about Avogadro's number brainly.com/question/229300
Learn more about mole conversions brainly.com/question/1370888

Keywords: moles conversion, Avogadro's number

5 0

3 years ago