PLEASE HELPPPPP Antimony exists naturally as 2 isotopes. Antimony-121 has a mass of 120.9038 amu and an abundance of 57.30%. Determine the mass of the other isotope, antimony-123 knowing the average atomic mass of the element is 121.80 amu.

Answers

Answer 1

Answer:

Answer: 1.6.905.x2.00=amu

Explanation:

if you multiply the atomic mass x 2.00 it will give you 1.6.905x2.00Amu your welcome

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Describe what happens to a hydrogen bond between two water molecules

Answers

Explanation:

Hydrogen atoms of one water molecule are attracted towards the oxygen atom of a neighboring water molecule can be termed as an intramolecular bond.

Generally, the oxygen atom is partially negatively charged, and the hydrogen atom is partially positively charged, so an arttraction occurs which forms this hydrogen bond. The attraction of the O-H bonding electrons towards the oxygen atom leaves a deficiency on the far side of the hydrogen atom relative to the oxygen atom. The result is that the attractive force between the O-H hydrogen and the O-atom of a nearby water molecule is strong.

Calculate the number of atoms of carbon in 3.8 moles of methane (CH4)

Answers

Total, 2.28916 × 10²⁴ atoms of carbon in 3.8 moles of methane.

To calculate the number of atoms of carbon in 3.8 moles of methane (CH₄), we need to consider the molecular formula of methane, which is CH₄. This indicates that each molecule of methane contains one carbon atom (C) and four hydrogen atoms (H).

First, let's find total number of carbon atoms in 3.8 moles of methane:

Number of moles of carbon in 1 mole of methane (CH₄) = 1 mole (because there is 1 carbon atom in each molecule of CH₄)

Number of moles of carbon in 3.8 moles of methane = 3.8 moles

Now, we'll use Avogadro's number to convert moles to the number of atoms:

Avogadro's number (NA) = 6.022 × 10²³ atoms/mol

Number of carbon atoms in 3.8 moles of methane = 3.8 moles × Avogadro's number

Number of carbon atoms in 3.8 moles of methane = 3.8 moles × 6.022 × 10²³ atoms/mol

Now, let's calculate:

Number of carbon atoms in 3.8 moles of methane ≈ 2.28916 × 10²⁴ atoms

So, there are approximately 2.28916 × 10²⁴ atoms of carbon in 3.8 moles of methane.

To know more about carbon atoms here

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There are 6.02*10^23 molecules per mole substances. And there is one carbon atom per molecule of CH4. So the atoms number is 3.8*6.02*10^23=2.29*10^24.

In the last 100 years, the level of CO2 in the atmosphere has been significantly increased by man by: pesticides the burning of fossil fuels domestic heat incineration of waste products

Answers

The major contributor of CO2 in the atmosphere which has a human source is the burning of fossil fuels - this is the correct answer. This is especially serious concern since the industrialization, but also includes heating with coal in people's private homes.

Answer:

The correct answer is Option (2)- Burning up of fossil fuels

Explanation:

Fossils are the remnants of the ancient plants and animals that were buried millions of years ago. Those fuels that are made up of these fossilized matters are commonly termed as fossil fuel. For example, Petroleum, Coal and natural gas. These are the major source of energy.

These fossil fuels are limited in amount and are non-renewable sources of energy. These are exploited rapidly by human beings. This burning up of fossil fuels leads to the production of a large amount of Carbon dioxide (CO₂) gas that causes a significant impact on the atmosphere. The increase in the CO₂ content also leads to an increase in the global temperature of the earth.

In the last 100 years, the CO₂ level in the atmosphere has immensely increased.

Hence, the correct answer is option (2).

If the [H+] in a solution is 1*10^-1 mol/L, what is the [OH]?

Answers

K(w)=[OH⁻][H⁺] (K(w)=1×10⁻¹⁴)

[OH⁻]=K(w)/[H⁺]
[OH⁻]=(1×10⁻¹⁴)/0.1
[OH⁻]=1×10⁻¹³M

I hope this helps. Let me know if anything is unclear.

When the equation H2S + HNO3 → S + NO + H2O is balanced, what is the coefficient for H2O?

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It isn't balanced. You have 3 *H and 3 * O, so something in the first formula must be changed. Have been searching for 1 hour and can't find the answer.

the answer is not 3 but i am guessing 6 please let me know

Pure,24k gold is very malleable.by mixing gold with other metals it becomes less malleable.in what situations would you want to use gold that is not as malleable?

Answers

You could use the less malleable mixture of minerals. Say you have a gold earring this is bad because overtime it goes through lots of wear and tear, the shape of the earring will change. If it was less malleable it will withstand more wear and tear.

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