How do electrons differ from protons and neutrons? A. They do not move. B. They are larger. C. They are not in a fixed position. D. They are located in the nucleus.

The average atomic mass of a sample of naturally occurring element X, comprised of isotopes ^51X, ^52X, and ^56X with natural abundances of 47%, 17%, and 36%, is calculated to be 52.97 atomic mass units (amu).

The average atomic mass of a sample of naturally occurring X can be calculated by taking into account the natural abundance of its isotopes. To find the average atomic mass of element X, we multiply the mass number of each isotope by its respective natural abundance (converted to a fraction), and then add these values together.

For isotopes ^51X, ^52X, and ^56X with natural abundances of 47%, 17%, and 36%, respectively, we calculate the average atomic mass as follows:

Summing these products gives us:

23.97 amu + 8.84 amu + 20.16 amu = 52.97 amu

Therefore, the average atomic mass of naturally occurring X is 52.97 amu.

Final answer:

To find the number of moles of hydrogen gas from the given 5.080 \u00d7 1016 molecules, divide by Avogadro's number, resulting in 0.0843 moles of hydrogen gas.

Explanation:

To convert the number of molecules to moles, we use Avogadro's number (6.022 \u00d7 1023 molecules/mol). Given the student has 5.080 \u00d7 1016 molecules of hydrogen gas (H2), we set up a conversion factor to cancel out the units of molecules and leave the units of moles.

The calculation to determine the number of moles from the given number of molecules is:

(5.080 \u00d7 1016 molecules H2) \u00d7 (1 mol H2 / 6.022 \u00d7 1023 molecules H2) = 0.0843 moles H2

This shows that the student has 0.0843 moles of hydrogen gas.

This problem is very vague since no other details are given. However for the sake of calculation let us assume that the compound is an ideal gas at STP.

So that the molar volume is: 1 mole = 22.4 L

density = (44.01 g/mol) * (1 mol / 22.4 L) = 1.96 g/L = 1.96 kg/m^3

Answer:

CO2

Explanation:

Carbon has a mass of 12.011 on the periodic table

Oxygen has a mass of 15.999 on the periodic table.

Well, there's one carbon and two oxygens in the compound CO2, and when you complete 12.011+15.999(2), you get 44.01 g/mol

Answer:

CO2

Explanation:

Carbon has a mass of 12.011 on the periodic table

Oxygen has a mass of 15.999 on the periodic table.

Well, there's one carbon and two oxygens in the compound CO2, and when you complete 12.011+15.999(2), you get 44.01 g/mol

Answer:

D a ionic compound with properties different from magnesium or oxygen.

Explanation:

The number of valence electron in silver is one.

Valence electrons are the electrons that are found in the outermost shell of an atom. They are the electrons that are involved in chemical bonding.

The atomic number of silver is 47, which means that there are 47 protons in the nucleus of a silver atom. The number of electrons in a neutral atom is equal to the number of protons in the nucleus. This means that there are also 47 electrons in a neutral silver atom.

The electron configuration of silver is [Kr] 4d¹⁰ 5s¹. This means that the outermost shell of silver has 1 electron. The 4d¹⁰ electrons are filled, and the 5s¹ electron is the valence electron.

The valence electron of silver is important for its chemical properties. Silver is a good conductor of electricity because the valence electron is easily removed from the atom. This allows silver to form bonds with other atoms and conduct electricity.

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The answer is A. Mixtures because they can still be seperated

Answer:

Covalent Bonding

Explanation:

If atoms have similar electronegativities (the same affinity for electrons), covalent bonds are most likely to occur. Because both atoms have the same affinity for electrons and neither has a tendency to donate them, they share electrons in order to achieve octet configuration and become more stable.

Answer: Protons

The answer is the last one.

Final answer:

The concentration of the original HBr stock solution can be calculated using the dilution equation by accounting for the serial dilution process and the given data on the final concentration and dilution volumes.

Explanation:

To determine the concentration of the original HBr stock solution when five standard solutions are prepared by serial dilution, we use the dilution equation C1V1 = C2V2, where C1 is the concentration of the stock solution, V1 is the volume taken from the stock solution, C2 is the concentration of the diluted solution, and V2 is the volume of the diluted solution. In this case, the final concentration C2 is given as 2.77 × 10−6 M, and each dilution involves diluting a 10.00 mL aliquot to 150.00 mL. Because there are five dilutions, the total dilution factor is (150.00/10.00)5. To find the original concentration C1, we rearrange the dilution equation to C1 = C2 × (V2/V1)n, where n is the number of dilutions, which is 5.you do the opposite operations. 3.17E-6 M (150.0 mL / 10.00 mL) = 4.76E-5 M (150.0 mL / 10.00 mL) = 7.13E-4 M (150.0 mL / 10.00 mL) = 1.07E-2 M (150.0 mL / 10.00 mL) = 0.160 M So the original stock was a 0.160 M HBr solution.

Answer: 1.6221*10^23 atoms

Explanation:

Butane = C4H10

Molar mass = 58g/mol

1 mole of butane has 4 carbon atoms.

% of carbon in 1 mole of C4H10 = 4*12/58 =82.8%

Mass of carbon in 4g of butane = 82.8/100 *4 = 3.312g.

3.312g of carbon is equal to how many moles of carbon?

No.of moles = mass/ molar mass

3.312/12 = 0.276 moles.

Using Avogadro's number,

Number of atoms in any substance = Avogadro's constant * no of moles of that substance

(6.02214*10^23) * 0.276 = 1.6221*10^23 atoms.

The eccentricity of Earth's orbit is a measure of its elliptical shape and is calculated using the distance to the foci and the semi-major axis of the orbit. Earth's orbital eccentricity is approximately 0.0167, indicating it is nearly circular with a slight elongation.

The eccentricity of Earth's orbit is a measure of its deviation from a perfect circle. The orbit of Earth is slightly elliptical, with an eccentricity that is generally known to be less than 0.1, which means it is very close to circular. To calculate the eccentricity (e), one can use the formula e = f/a, where f is the distance from the center of an ellipse to one of the foci, and a is half the long axis of the ellipse.

For Earth's orbit, we have an average semi-major axis of approximately 1.496 × 10¹ meters (the average distance from the Earth to the Sun) and specific calculations yield an eccentricity value of approximately 0.0167. This is indeed less than 0.1, confirming that Earth's orbit is nearly circular, but with a slight elongation.

The most effective method to separate oil and water is by using density differences with a separatory funnel. Distillation is also suitable but more complex. Filtration and separation by particle size are not appropriate for this mixture.

The student asked: Which method would be best to separate a mixture of oil and water?

The best method to separate a mixture of oil and water is separation by density. Since oil and water have different densities, the oil will float on top of the water. Using a separatory funnel, you can pour out the water from the bottom, leaving the oil behind.

Another method that could be used is distillation. Since water and oil have different boiling points, heating the mixture will allow the water to boil and be collected separately from the oil. However, this method is more complex and generally less practical for simple separation tasks.

Filtration and separation by particle size are not effective methods for this type of mixture because both oil and water are liquids and do not have different particle sizes or solid components that can be filtered.

Correct Question - Which method would be best to separate a mixture of oil and water?

The answer B. solute; solvent

Answer:

plato answer is b

Explanation:

Metals are placed on left side of periodic table and middle portion of it.Non-metals are placed on right side while the metalloids are along zig-zag line on right side of periodic table.

It is the tabular display of elements  which are discovered till date may it be natural or man -made.It provides a graphic representation of modern periodic law according to which elements are arranged in increasing order of their atomic numbers.

The table consists of seven horizontal rows called periods and 18 vertical columns called groups. The table has enabled classification of elements based on electronic configuration and atomic numbers.

The table is called periodic because the properties of elements repeat after regular intervals of atomic numbers.Hence ,elements with similar properties fall in same group of the periodic table.

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Vinegar

Sugar water

Soda pop in a sealed bottle

Answer:A,D,F

Explanation:

The blank should be filled with "Magma". Magma is melted rock beneath the Earth's surface. When magma slowly cools underground, it forms intrusive igneous rocks.

Magma is a mixture of molten rock, minerals, and gases that forms beneath the Earth's surface. It originates from the partial melting of rocks in the Earth's mantle or crust due to high temperature and pressure conditions.

When magma rises towards the Earth's surface, it can solidify underground before reaching the surface. This process occurs when the magma cools slowly over a long period of time. As it cools, the minerals within the magma crystallize and solidify to form intrusive igneous rocks. Since this process happens below the surface, intrusive igneous rocks are also known as plutonic rocks.

Intrusive igneous rocks have a coarse-grained texture because the slow cooling allows sufficient time for large mineral crystals to form. Examples of intrusive igneous rocks include granite, diorite, and gabbro. These rocks can be exposed at the Earth's surface through uplift and erosion, revealing the once-buried formations.

Propane is C3H8

So Molar mass propane = 3*12 + 8*1 = 44 
No. of moles of propane = 167/44 = 3.795 moles