What is the period of a wave with a frequancy of 3 Hz and an amplitude off 0.01
1 answer:
0.33 seconds is the period of a wave with a frequency of 3 Hz and an amplitude off 0.01 .
<u>Explanation:</u>
We have , period of a wave with a frequency of 3 Hz and an amplitude off 0.01 . We know that period of a wave is amount of time needed to complete one oscillation . In order to calculate period of wave we use frequency and the formula use is . We are given that frequency = 3 Hz:
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Therefore, 0.33 seconds is the period of a wave with a frequency of 3 Hz and an amplitude off 0.01 .
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Answer:
55.9 g KCl.
Explanation:
Hello there!
In this case, according to the definition of molality for the 0.500-molar solution, we need to divide the moles of solute (potassium chloride) over the kilograms of solvent as shown below:
Thus, solving for the moles of solute, we obtain:
Since the density of water is 1 kg/L, we obtain the following moles:
Next, since the molar mass of KCl is 74.5513 g/mol, the mass would be:
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Answer:
B.3/5p
Explanation:
For this question, we have to remember <u>"Dalton's Law of Partial Pressures"</u>. This law says that the pressure of the mixture would be equal to the sum of the partial pressure of each gas.
Additionally, we have a <em>proportional relationship between moles and pressure</em>. In other words, more moles indicate more pressure and vice-versa.
Where:
=Partial pressure
=Total pressure
=mole fraction
With this in mind, we can work with the moles of each compound if we want to analyze the pressure. With the molar mass of each compound we can calculate the moles:
<u>moles of hydrogen gas</u>
The molar mass of hydrogen gas () is 2 g/mol, so:
<u>moles of oxygen gas</u>
The molar mass of oxygen gas () is 32 g/mol, so:
Now, total moles are:
Total moles = 2 + 3 = 5
With this value, we can write the partial pressure expression for each gas:
So, the answer would be <u>3/5P</u>.
I hope it helps!
The number of moles of Mg, Cl, and O atoms is 7.60 moles of magnesium perchlorate 7.60, 15.2, and 60.8 moles respectively.
<h3>What is the mole?</h3>Mole is a standard scientific unit that is used to measure large quantities of small things such as atoms, molecules, atoms, etc. A mole is the amount of a substance that contains 6.023× 10²³ particles of a substance.
The number 6.023× 10²³ is also known as the Avogadro number and is designated by the symbol .
The total number of atoms in every molecule of magnesium perchlorate needs to calculate. The chemical formula of the magnesium perchlorate is Mg(ClO₄)₂.
Therefore the number of atoms of magnesium, chlorine, and oxygen are 1, 2, and 8 respectively. Then, the number of moles of Mg, Cl, and O in 7.60 moles of magnesium perchlorate will be equal to :
Number of moles of Mg = 1 × 7.60 moles = 7.60 mol
Number of moles of Mg = 2 × 7.60 moles = 15.2 mol
Number of moles of Mg = 8 × 7.60 moles = 60.8 mol
Therefore, the number of moles of Mg, Cl, and O in 7.60 moles of Mg(ClO₄)₂ is 7.60, 15.2, and 60.8 moles respectively.
Learn more about the mole concept, here:
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Your question is incomplete, but most probably your full question was,
Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 2.60 moles of magnesium perchlorate, mg(clo4)2. express the number of moles of Mg, Cl, and O atoms numerically, separated by commas.