Please help me with this thank you !!

Answer:

Selenium

Explanation:

Answer:

O(Oxygen)

Explanation:

Oxygen or O among the given options has the highest electronegativity of 3.5 as compared to 2.4 of sulfur. Thus, there is a lesser attraction in the bonds of Sulfur. The other two elements Al(Aluminium) and Cu are less electronegative than Sulfur and Oxygen as they are metals and possess electropositivity while the latter displays more electronegativity due to being non-metals. Hence, Oxygen is the answer.

Answer:

Explanation:

Option B is the correct answer

Answer:

a)  quadruple covalent bond

Explanation:

Quadruple covalent bonds are the strongest covalent bonds. The more the number of bonding pairs, the stronger the bond becomes.

Single < double < triple < quadruple covalent bonds.

Answer:

to determine the number of neutrons in atom, we only have to subtract the number of protons from the mass number. the nucleus of an atom is composed of protons and neutrons. And the number of particles present in the nucleus is referred as mass number (Also, called as atomic mass).

Explanation:

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Answer:

Venus is very hot because of the clouds that surround it.  It is roughly the same size as Earth, it is just a little smaller.  Venus is a rocky planet and has a lot of volcanoes.

That's all I know, you might have to research it. :/

Answer:

Hey mate, here is your answer. Hope it helps you.

Explanation:

To show how substances in a chemical reaction interact and to keep track of all elements and the number of atoms in each element on each side of the equation.The purpose of writing a balanced chemical equation is to know: the reactants (starting material) and products (end results) that occur. the ratios in which they react so you can calculate how much reactants you need and how much products can be formed.

Answer:

Sample Response: Chemical equations show how chemicals interact when a reaction occurs. They use symbols and formulas to show the chemical reaction so that chemical names do not need to be written out. They also help keep track of all elements and the number of atoms of each element on each side of the equation.

Explanation:

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Answer:

Scientists have predicted that long-term effects of climate change will include a decrease in sea ice and an increase in permafrost thawing, an increase in heat waves and heavy precipitation, and decreased water resources in semi-arid regions

Explanation:

Answer:

CO₂

Explanation:

The product of the reaction is CO₂.

In a chemical reaction, the product is the substance usually found on the right hand side of the expression.

  Reaction equation is given as;

          C  +  O₂  →  CO₂  

In this reaction, C and O₂ are the reactants

  CO₂ is the product of the reaction.

Answer:D erosion

Explanation:

The question tells you how the students watched the dirt move so it makes sense that its erosion

Answer:

C. The initial version is tested during the third stage to determine what needs to be improved, and the beta version is tested during the fourth stage to ensure that criteria are met.

Explanation:

Edge 2021

The Testing of the initial version is carried out in the third stage to determine what needs to be improved, while the testing of the beta version is carried out during the fourth stage to ensure that all necessary criteria are met.

The process of technological design involves several distinctive processes which can be broken down into four stages.

The four stages involved in the  process of technological design are :

hence the testing of the initial version is to determine what needs improvement while the testing of the beta version is to ensure all criteria are met

learn more here: https://brainly.com/question/23367920

Answer:

Which of the elements below will form an anion?

CI (Chlorine)

Explanation: Chlorine generally behaves as an anion having an oxidation state -1

Answer:

Rolling down a steep hill

Explanation:

Explanation:

This Theory proves that every Organism is made of one cell.

This also explained spread of cells like that of cancer.

this also explains how organisms create and die.

it explained the why organisms of same breed are alike or similar

Answer:

36g

Explanation:

Given parameters:

Mass of H₂  = 4g

Unknown:

Mass of water produced  = ?

Solution:

The reactants in this experiment are hydrogen and oxygen gas. The product formed will be water, H₂O.

 Now write the reaction equation first;

                   2H₂  + O₂  →  2H₂O

Find the number of moles of Hydrogen gas;

         Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

  Molar mass of H₂  = 2(1) = 2g/mol

        Number of moles  = [tex]\frac{4}{2}[/tex]   = 2moles

From the balanced reaction equation;

             2 moles of H₂ will produce 2 moles of H₂O

So, mass of H₂O produced;

        Mass of H₂O = number of moles x molar mass

   Molar mass of H₂O  = 2(1) + 16  = 18g/mol

    Mass of H₂O  = 2 x 18 = 36g

We can see from the calculations that the use of 4g of hydrogen produces 36 g of water.

We know that water is produced from the equation;

2H2(g) + O2(g) ----> 2H2O(g)

Number of moles of hydrogen = 4 g/2 g/mol = 2 moles of hydrogen

From the reaction equation, we can see that 2 moles of hydrogen yields 2 moles of water.

Hence, If we use 4g  of hydrogen, we end up with 2 moles of water.

Mass of water = 2 * 18 g/mol = 36 g

Learn more about stoichiometry: https://brainly.com/question/1301963

Answer:

Explanation:

The momentum of an object can be found by using the formula

momentum = mass × velocity

From the question we have

momentum = 0.00001346 * 790204000

= 10636.14584

We have the final answer as

Hope this helps you

Answer:

thermal energy from the sun

Explanation:

because the sun have more potencia

Answer:

If the frequency is doubled, the wavelength is only half as long.

Explanation:

Wave speed equals frequency*wavelength. So doubling the frequency must halve the wavelength in order for wave speed to remain the same.

Answer:

two hydrogen atoms

Explanation:

Answer:

The chemical element of an atom is determined by the number of protons, or the atomic number, Z, of the nucleus. The element oxygen has an atomic number Z=8, while carbon has Z=6.

Explanation:

Answer:

The number of protons determines which kind of element an atom is. If an atom has 8 protons, we can determine this element is oxygen.

Explanation:

In the nucleus of an atom, there are protons and neutrons. Protons have a positive charge and neutrons have a neutral charge. All atoms have at least one proton that determines its atomic number.

Answer:

B. Nickel Chloride

Explanation:

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Answer:

B. Nickel chloride

Explanation:

did the assignment on edge

Answer:

See explanation

Explanation:

Since the -CH3CN and the -F are in 1,4 position, then the synthesis started with flourobenzene. This has to be because -F is ortho-para directing in nucleophilic substitution.

The next step is the Friedel craft alkylation of the substrate. The alkyl group is directed to the para position by the -F.

Bromination using NBS yields an alkyl bromide that undergoes SN2 substitution to yield the target compound.

Answer:

1. The body's immense blood supply (when blood vessels dilate or become larger heat loss occurs) When the blood vessels constrict it holds in heat

2. The skins blood supply also helps maintain body temperature (helps maintain homeostasis which is the "normal" state of our body)

3. Humidity in the air effects thermoregulation (heat regulation in the body) by limiting sweat evaporation (usually sweat evaporates into the environment when the humidity is low because the air has low "water levels" per say while you have high "water levels" because of your sweat

Answer:

mixture, because it is made of more than 1 ingredient.

2.67 × 10^19

Explaination:

The volume of the gas is 1c.c = 10^ - 3L

∴ Number of moles of the gas is=22.4 × 10^-3

Now,

Number of molecules = n × 6.022 × 10^23

∴ Number of Nitrogen Molecules

= 10^-3/22.4 × 6.023 × 10^23

  = 2.67 × 10^19

Answer:

6.02 x 10²⁰ molecules

Explanation:

Given parameters:

Volume of nitrogen  = 120cm³

Unknown:

Mass of Nitrogen = ?

Number of molecules present in it = ?

Solution:

At STP;

       1 mole of a substance contains 22.4dm³ particles

      100cm³ = 1dm³

     24cm³ will give 0.024dm³

        22.4dm³ of particles are in 1 mole of substances at STP

         0.024dm³ of particles will contain  [tex]\frac{0.024}{24}[/tex]   = 0.001mole

Mass of Nitrogen  = Number of moles x molar mass

  molar mass of nitrogen  = 14g/mol

   Mass of nitrogen  = 0.001 x 14  = 0.014g

Number of molecules present;

      1 mole of a substance contains 6.02 x 10²³ molecules

     0.001 mole of Nitrogen will contain 0.001  x  6.02 x 10²³ = 6.02 x 10²⁰

         6.02 x 10²⁰ molecules

Answer:

BiAs

Explanation:

Answer:

A

Explanation:

Answer:

in physics, a vapor or vapour is a substance in the gas phase at a temperature lower than its critical temperature, which means that the vapor can be condensed to a liquid by increasing the pressure on it without reducing the temperature. A vapor is different from an aerosol.

Explanation: