Which of these changes most likely results in an increase in the volume of a gas? A0 Decreasing the pressure on the gas. B) Cooling the gas. C) Removing some of the gas form the sample.

Answers

Answer 1

Answer:

The answer is (B) decreasing the pressure on the gas, as Boyle's law states that at a constant temperature, the volume of a gas is inversely proportional to its pressure.

Removing some of the gas from the sample is the change that most likely results in a decrease in the volume of the gas, rather than an increase. This is because decreasing the amount of gas in the sample will reduce the total volume of the gas.

On the other hand, cooling the gas will typically cause it to contract, reducing its volume. Similarly, decreasing the pressure on the gas will typically cause it to expand and increase in volume.

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Which atomic model proposed that electrons move in specific orbits around the nucleus of an atom

Answers

The atomic model that proposed that electrons move in specific orbits around the nucleus of an atom is the Bohr model, or the Rutheford-Bohr model, envisioned by Niels Bohr in 1913.

How many protons , electrons, and neutrons are contained in gallium-69?

Answers

In gallium-69, there are 31 protons, and and 31 electrons, if it is an atom of gallium-69. There are 38 neutrons as well.

Final answer:

Gallium-69, an isotope of Gallium, contains 31 protons, 31 electrons and 38 neutrons.

Explanation:

Gallium-69 is a specific isotope of the element Gallium.Gallium is the element with atomic number 31 on the periodic table. This atomic number means that a Gallium atom has 31 protons in its nucleus. Given that in a neutral atom the number of electrons equals the number of protons, we can also deduce that Gallium-69 contains 31 electrons.

The number following the name of the element, 69 in this case, is the isotope's mass number, which is the total number of protons and neutrons that an atom of that isotope contains in its nucleus. To find the number of neutrons in Gallium-69, you simply subtract the number of protons from the mass number. This yields 69 - 31 = 38. Thus, Gallium-69 has 38 neutrons.

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Net ionic equation for Lead acetate (II) + potassium chromate

Answers

Answer:Pb ( C2 H3O2)2 + K2 CrO4 → Pb CrO4 + 2 CH3 CO2K

Explanation:

The balanced molecular equation for the reaction between lead (II) acetate and potassium chromate is ^

2.0 g of H2 gas reacts with 32 g of O2 gas to form water. Assuming the reaction goes to completion, how many grams of water will be produced?

Answers

In order to solve this problem, the balanced chemical equation of the reaction must be used. This gives the equation:

2H2 + O2 --> 2H2O

Next, the moles of the reactants must be used in order to apply their stoichiometric relationships. Note that 1 mole of oxygen needs 2 moles of hydrogen for the reaction proceed. Since there is only 1 mole of H2, only 0.5 moles of oxygen are consumed.

moles H2 = 2 g/ 2g/mol = 1 mole H2
moles O2 = 32 g/ 32g/mol = 1 mole O2

2H2 + O2 --> 2H2O
i 1 1 0
c 1 0.5 1
e 0 0.5 1

Assuming the reaction will proceed, there will be an excess of 0.5 mol O2 and a product of 1 mol H2O. This gives 18 grams of water.

Which molecule, when added to a solution, would give the solution the highest pH?HCl
H2SO4
KOH
H2O

Answers

The molecule, when added to a solution, would give the solution the highest pH is KOH. This is because when KOH is in the solution, it will give a very strong basic properties due to the -OH and the K which is highly electropositive.

Answer:

The answer is C.

Explanation:

Because, KOH is the highest PH in the molecule(s).

NEED HELP!!!!!!1s² 2s² 2p⁶ 3s² 3p⁵ is the electron configuration for which element? *

fluorine
chlorine
sulfur
bromine

Answers

1s² 2s² 2p⁶ 3s² 3p⁵ is the electron configuration for B)chlorine.

What are the 4 types of electron configuration?

The 4 special types of orbitals (s,p,d, and f) have distinctive shapes, and one orbital can hold a most of twoelectrons. The p, d, and f orbitals have different sublevels, accordingly can keep extraelectrons. As stated, the electronconfiguration of each detail is precise to its position on the periodic table.

In atomic physics and quantumchemistry, the electronconfiguration is the distribution of electrons of an atom or molecule (or different bodily structure) in atomic or molecularorbitals.

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Chlorine.

If you search Google images for "Aufbau principle periodic table," you'll find some handy diagrams that will make it much easier to determine an element based on its electron configuration. Determine the number of electrons in the last part of the configuration (in this case, 5), locate that group on the Aufbau periodic table diagram, then count that number from left to right within that group. In this case, within the "3p" portion of the Periodic table, count to 5 and you'll find Chlorine as the answer.

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