Which of the following combination of elements would result in covalent compound? * W X Y Z Vand X Wand Z Y and Z Wand y​

Answer:

n = 3.0 moles

V = 60.0 L

T = 400 K

From PV = nRT, you can find P

P = nRT/V = (3.0 mol)(0.0821 L-atm/K-mol)(400 K)/60.0L

P = 1.642 atm = 1.6 atm (to 2 significant figures)

Explanation:

1 chromium atom

Explanation:

number of (Cr) atom =

[tex] \frac{mass \: of \: cr}{molar \: mass \: (amu)} [/tex]

n = m/M

n = 52/52

n= 1g

Answer:

See explanation

Explanation:

The reaction equation is;

Cl2(g) + 3 F2(g) ------>2 ClF3(g)

If the volume of the flask containing the reactants in this exothermic reaction is decreased, the equilibrium position will shift towards the right hand side.

This is because, decrease in the volume of the reaction system drives the equilibrium in the direction producing the lower total volume which in this case is the forward direction

Hence when the volume of the reaction system is decreased, more ClF3 is obtained because the equilibrium position shifts towards the right hand side.

Answer: Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Explanation: Hope this helps!

Answer:  (1) Inhales (breathes in) Oxygen - good for the body - gives it to the Circulatory System to be transported throughout the body through the blood. (1) Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go.

Answer:

Ionic Bond

Explanation:

The bond between metals and non-metals is an ionic bond. This is due to the large difference in electronegativity between the non-metal and metal. Metals give up electrons easily, so they will have lower electronegativities. Non-metals can easily gain electrons, so they have high electronegativities. If you look at valence electrons, they will extensively/exclusively surround the non-metal.

A bond that occurs between metals and non-metals is called an [tex]\sf\purple{ionic\: bond}[/tex].

Explanation:-

Ionic bonds usually involves the transfer of electrons from a metal atom to a non-metal atom.

The metals lose electrons and form cations while the non-metals accept the lost electrons and form anions.

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Answer:

A

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Answer:

D.) When HX adds to an asymmetrical alkene, the halogen attaches to the least substituted sp² carbon.

Explanation:

Which of the following statements is NOT true?

A.) When HX adds to an asymmetrical alkene, the sp² carbon bonded to the most H atoms is protonated. TRUE. This is known as Markovnikov's rule.

B.) When HX adds to an asymmetrical alkene, protonation leads to the most stable carbocation intermediate. TRUE. The order of stability of carbocations is tertiary > secondary > primary.

C.) When HX adds to a symmetrical alkene, either of the sp² carbons can be protonated. TRUE. Since the alkene is symmetrical, either carbon can be protonated.

D.) When HX adds to an asymmetrical alkene, the halogen attaches to the least substituted sp² carbon. FALSE. The halogen attaches to the most substituted sp² carbon.

Answer:

pH = 10

Explanation:

As the problem states, with strong bases the hydroxide ion concentration [OH⁻] is equal to the concentration of the base. That means that in this case:

With [OH⁻] we can calculate the pOH of the solution:

Then with the pOH, we calculate the pH of the solution:

Answer: 98.08 g/mol

Explanation:

i just took this test and got it right

Answer:

A

Explanation:

Answer:

The correct answer is 150 kilograms.

Explanation:

Based on the given information, the ratio of zinc and copper within the alloy is 2:5. The amount of zinc used in the alloy is 60 kg. Now the amount of copper used within the alloy would be,

Zinc/Copper = 2/5

60/Copper = 2/5

Copper(Cu) = 60*5/2

Cu = 150 Kilograms.

Thus, the amount of Cu used in the alloy is 150 Kg.

Answer:

-OH functional group

Trust me

Answer: a

Explanation:

Answer:

gas molecules spread out in response to a concentration gradient.

Explanation:

Diffusion can be defined as the movement of gas molecules from a region of high concentration to a region of lower concentration until an equilibrium is attained or reached. This mixing of gas molecules in the liquid or gaseous state is due to their kinetic energy of random motion i.e without requiring bulk motion.

This ultimately implies that, diffusion is a phenomenon through which gas molecules in either a gaseous or liquid state spread out in response to a concentration gradient, which is simply the difference in concentration of the gases across a space.

In conclusion, increasing the surface area of a gas increases its collision rate and it's considered to be an evolutionary strategy that maximizes the diffusion of gas molecules by catalysing the rate of a gaseous reaction.

Answer:

I hope that helps. I did not round the answer at the end. Maybe you want the final answer in a specific decimal place.

Answer;

4.29%

Explanation:

molecular weight of Al(NO3)3 is

27+(14+16*3)3=213 amu

total mass of oxygen is 3*3=9 amu

percentage is 9/213*100=4.25%

Answer:

Graduated cylinders are long, slender vessels used for measuring the volumes of liquids. They are not intended for mixing, stirring, heating, or weighing. Graduated cylinders commonly range in size from 5 mL to 500 mL.

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The chemical equilibrium is the state at which the rate of reaction is constant. The increase in pressure shifts the reaction towards the product side, as fewer moles of the product are there.

The chemical equilibrium is shifters with the change in the concentration, temperature, pressure, and volume of the reaction.

The increase in the pressure results in more contact between the reactant molecules, as they are more in number and moles in the reaction.

The increased collision of the reactant molecules tried to reach the equilibrium condition, and the increased formation of the product is observed.

Thus, the increase in the pressure shifts the chemical equilibrium towards the product, as there were few moles of the product in the reaction.

Learn more about chemical equilibrium, here:

https://brainly.com/question/4289021

Answer:

its C

Explanation:

just took the test

Answer:

Option E

RbCL<CH3OH< CH3Cl< CH4

Explanation:

The boiling temperature of an organic compound increases with the increase in number of carbon atoms and hence as the length of the hydrocarbon chain increases the boiling temperature also increase due to increase in force of attraction between the molecules. Also presence of strong molecules such as OH – COOH also increases the boiling temperature while Cl and other elements with high electronegativity reduces the boiling temperature  

Hence, the correct order of increasing boiling temperature is option E

RbCL<CH3OH< CH3Cl< CH4

Answer:

The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in that medium is λ = λ0/n, where λ0 is the wavelength of that light in vacuum.

Explanation:

Answer:

The amount H2O produced is also halved

Explanation:

A strong acid as HCl reacts with a strong base as NaOH producing water and a salt, NaCl. The reaction is:

HCl + NaOH → NaCl + H₂O

Where 1 mole of HCl reacts per mole of NaOH to produce 1 mole of water.

That means, if the amount of HCl and NaOH is halved, the amount H2O produced is also halved because 1 mole of each reactant produce 1 mole of water

Answer:

I think the answer will be A

Answer:

ch3och3

Explanation:

Answer:

1 × 10−11 M

Explanation:

I took the test :) guy above me is right

Answer:

Most of the scientists worldwide do not accept this theory.

Explanation:

Lamarck's theory states that acquired traits can be passed on from parents to offspring. This theory can not be sufficiently substantiated by indisputable scientific evidences hence it is not accepted by majority of scientists worldwide.

Since science is empirical and the theory is mostly based on vague speculations rather than concrete evidence, it was long rejected by many biologists.

This theory suggests that all life forms will gradually evolve from simple to complex organisms while the simple organisms gradually disappear. This is not the case.

Answer:

0.170 M

Explanation:

As this is a series of dilutions, we can continuosly use the C₁V₁=C₂V₂ formula to solve this problem:

For the first step:

Then for when 129 mL of that 0.412 M are diluted by adding 183 mL of water:

Using C₁V₁=C₂V₂:

Answer:

0.464 L

Explanation:

Molarity (M) = number moles (n) ÷ volume (V)

According to the information given in this question:

number of moles (n) = 4.36 moles

Molarity = 9.4M

Volume = ?

Using M = n/V

9.4 = 4.36/V

9.4V = 4.36

V = 4.36/9.4

V = 0.464 L

Hence, 0.464L of water are needed the volume of water.

Answer: OB How to collect evidence.

Explanation: Forensics deals with evidence and analyzing it.

Since Tricia is a forensic scientist, the most likely title of her training session will be How to Collect Evidence.

A forensic scientist a scientist who collects evidence in order to investigate crimes .

Since Tricia is a forensic scientist, she will be training the police officers on how to collect evidence at crimes scenes as well as to conduct thorough investigations.

Therefore, the most likely title of her training session will be How to Collect Evidence.

Learn more about forensic scientists at: https://brainly.com/question/11718983

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Complete question is;

The specific heat capacity of a pure substance can be found by dividing the heat needed to change the temperature of a sample of the substance by the mass of the sample and by the change in temperature. The specific heat capacity of a certain substance has been measured to be 3.52 J/g°C. Suppose 420.0 g of the substance is heated until the temperature of the sample has changed by 43.8 °C.

Write an equation that will let you calculate the last Q that was needed for this temperature change. Your equation should contain only symbols. Be sure to define each symbol.

Answer:

Q = m•c•Δt

Q = 64753.92 J

Explanation:

We are given;

Mass (m) = 420 g

Change in temperature; (Δt) = 43.8 °C

Specific heat capacity (c) = 3.52 J/g °C

The last Q is simply the heat energy that caused that temperature change.

This is given by the formula;

Q = m•c•Δt

Plugging in the relevant values;

Q = 420 × 3.52 × 43.8

Q = 64753.92 J

Solution :

We know, molecular mass of NH₃ is , M = 17 g/mol .

Number of moles of NH₃ in 7.2 × 10²⁴ are :

[tex]n = \dfrac{7.2 \times 10^{24}}{6.022 \times 10^{23}}\\\\n = 11.96\ moles[/tex]

So, mass of NH₃ present in 11.96 moles is :

m = 11.96 × 17 gram

m = 203.32 gram

Hence, this is the required solution.