Question 14 of 32
Which of the following pairs of elements will form covalent bonds with each
other?
The Periodic Table
O A. Silicon (Si) and nitrogen (N)
B. Magnesium (Mg) and oxygen (0)
C. Chromium (Cr) and zinc (Zn)
O D. Potassium (K) and bromine (Br)

Answer:

8000

Explanation:

it wil be twice the amount of the cars weight

Two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.

Its 2

Answer:

2 would be the amount to form a covalent bond

pH ranges depending on the solution, for a solution with weak acid pH will be between 4.0-7.0.

pH is helps to determine if a solution is acidic or basic in nature.

A pH meter is the instrument that can be used for the measurements.

Methyl orange is used when titrating a strong acid against a weak base.

Therefore, the pH of the solution which is a weak acid will be between 4.0-7.0.

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The experimental results would change if a different gas, such as CO₂, were used instead of air.

This comprises of gases that form the atmosphere and they include:

Due to the presence of other gases in air, there would be a change in experimental results.

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Answer: Decreases

Explanation: Electronegativity decreases because the valence electrons are farther from the nucleus.

Answer:B:63.75

Explanation:(5/8 x 63)+(3/8 x 65)=(0.625 x 63)+(0.375 x 65)=63.75

Answer:

62.7 gram

Explanation:

Molar mass = (6)(12)+(10)(1)+(1)(32)=114 g/mol

Mass = no of moles × molar mass

= 0.55 × 114 = 62.7 gram

The mass of 0.55 moles of compound C₆H₁₀S is equal to 62.7 g.

A mole is defined as a standard unit that is used to find a huge number of quantities such as atoms, molecules, ions, or other particles. The mass of the 1 mole of any chemical element is equal to the atomic mass of the element and that of any chemical compound is known as molar mass.

The number of entities in 1 mole was found to be equal to 6.023 × 10²³ which is known as Avogadro’s number or Avogadro's constant

Given, the number of moles of the given compound = 0.55 moles

The mass of 1 mole of given compound C₆H₁₀S  = 114 g/mol

The mass of 0.350 moles of the given compound = 0.55 × 114 = 62.7 g

Therefore, 62.7 grams is the mass of 0.55 moles of C₆H₁₀S.

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#SPJ2

Answer:

56.6 g Fe2O3

Explanation:

Balanced equation is given by

[tex]\\ \rm\Rrightarrow 4Fe+3O_2\longrightarrow 2Fe_2O_3[/tex]

On both sides

Hence balanced

Now

Moles of O_2:-

Moles of Fe_2O_3;

Mass of Fe_2O_3:-

Answer:

ANSWER: (a) 6.93 m3 (b) 54.286 m3 (c) 20.45% CO2, 1.3496 02, 78.21% N2

Explanation:

mark me as a brain list

Answer: I think it's C.

Explanation: I can't explain

Answer:

I thought A not C

Explanation:

But ill double check

After series of conversion from one unit to another, the number of gallons was found to be 12 litres

Given Data

Conversion from pounds to Gram

1 kg ---------2.204 lb

x kg ---------184.33 lb

x = 184.33/2.204

x = 83.634 kg

hence the mass in gram = 83.634*1000

mass in gram = 83634 g

Now let us find the volume

We know that density = mass/volume

volume = mass/density

volume = 83634/1.84

volume = 45453.26 cm^3

Convert cm^3 to litres

Volume in litres = 45453.26 /1000

Volume in litres = 45.45 Litres

Convert from Litres to Gallons

1 gallon = 3.79 L

x gallons =  45.45 L

x =  45.45/3.79

x gallons = 11.99 L

Approx = 12 Litres

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Answer:

2 protons per atom of Helium

Explanation:

The number of proton in a given element is given by its place on the periodic table which is for He 2 protons b/c the atomic number for He is 2.

Other Examples:

Hydrogen (H-1) or Protium has 1 proton b/c its atomic number is 1.

Magnesium (Mg-24) has 24 protons  b/c  its atomic number is 24.

Lead (Pb-207) has 82 protons b/c its atomic number is 82.

Uranium (U-238) has 92 protons b/c its atomic number is 92.

The periodic table order of arrangement of elements is based upon 'The Periodic Law'. => The chemical and physical properties of the elements is a periodic function of atomic numbers, or number of protons in the nucleus.

Answer:

The Electron Configuration for Sulfur(S)= 1s^2  2s^2  2p^6  3s^2  3p^4

Explanation:

Use the sheet attached to help with a future question. (Hint: Follow the red lines). The atomic number will be equal to the number of powers raised.

Answer:

-I dont have a calculator on me but I can explain to you how to do it and you can put it in your calculator

Explanation:

-First you have to balance the equation because its not balanced

4Na+2H2O —-> 4NaOH

-After you balance it you have to add up the grams of H2 gas,

-The mass of each element is measured in grams

- You find how many grams each element it by looking at the periodic table and looking at the number at the bottom, thats called the mass

- Afterward if the element mass you are looking for has a small number as its subscript, that means there is more than one, so you must add them together to get the correct amount of grams it has

1+1=2grams

-After that, you take that and convert it to moles

2grams x 1mole/(6.02^23)grams = (unknown) moles

-And finally you convert that answer from moles to liters

(Unknown) moles x 22.4 Liters / 1 mole = FINAL ANSWER

I hope this was helpful, I tried to break it down the best I could for you <3

Answer:

Nitrogen is the answer my good sir.

Explanation:

Answer:

They are big rocks that fly through space and are made of most commonly chondrite. When they collide, they collide with such force that they create craters on places like the moon.

Based on the reactants and products,

A precipitate is a solid product formed in when two solutions of salts react by double replacement.

The molecular equation of the reaction of Al(NO3)3 solution with a KOH solution is:

Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3

The complete ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:

Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+

The net ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:

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Answer: I THINK THIS IS THE ONE...

Explanation: This means “the configuration of xenon plus 6s2 4f14 5d10 6p2.”

Answer:

In classical soil science, humus is the fraction of soil organic matter that is amorphous and without the "cellular cake structure characteristic of plants

Explanation:

anyways were r we going 2 talk?

and wut did i miss?

Answer:

32 g

Explanation:

the molar mass of oxygen is 16 g

if it's asking o2 then 64

Reproduction is an energy requiring process as new organisms are produced from parents.

Reproduction is the process by which living organisms produce young ones of their own kind.

Reproduction can either be by;

Reproduction is an energy consuming process.

Energy is required for cell division and for building up new news in the new organism.

Therefore, during reproduction, energy is required.

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Answer:

a) there are three transition states

b) there are two intermediates; carbocation and protonated alcohol

c) The first step in the forward direction

Explanation:

The acid-catalysed hydration of alkenes proceeds via a carbocation mechanism.

Three transition states can be identified in this mechanism for the acid-catalyzed hydration of alkenes.

The three transition states are derived from the three steps in the reaction sequence:

1) Protonation of the alkene by hydronium ion

2) Addition of water to the carbocation

3) loss of a proton to yield the alcohol

The first step involves the breaking of a pi bond, hence it is a slow step hence it has the smallest rate constant. The other two steps are fast steps.

Explanation:

k

ca

mg

zn

fe

sn

pb

h

cu

hg

ag

pt

au

the answer is calcium or magnesium

because that metal's activity will be higher than al and

lower than Na. so that the metal will be ca or mg.

Answer:

0.13 M

Explanation:

The reaction equation is;

NaOH(aq) + KHC8H4O4(aq) ------> KNaC8H4O4(aq) + H2O(l)

Molar mass of KHP = 204.22 g/mol

Amount of KHP= mass/ molar mass = 0.3365 g/204.22 g/mol = 1.65 × 10^-3 moles

n= CV

Where;

C= concentration

V= volume in dm^3

n= number of moles

C= n/V = 1.65 × 10^-3 moles × 1000/250 = 6.6 × 10^-3 M

If 1 mole of KHP reacts with 1 mole of NaOH

1.65 × 10^-3 moles of KHP will react with 1.65 × 10^-3 moles of NaOH

From

n= CV

We have that only 12.44 ml of NaOH reacted

C= n/V = 1.65 × 10^-3 moles × 1000/12.44

C= 0.13 M

At the equivalence point, the KHP solution turned light pink.

Answer:

i think it would be

Explanation:

What is the unit rate of the better deal? (Number answers only.)

LaTeX: \frac{160\:miles}{5\:gallons}\:or\:\frac{315\:miles}{9\:gallons}160 m i l e s 5 g a l l o n s o r 315 m i l e s 9 g a l l o n s

The better deal has a unit rate of [m] miles per gallon.

Answer:

Air at sea level

Explanation:

sry If Im wrong

The reactants of the reaction will be solid gold (III) sulfide and hydrogen gas, while the products will be pure solid gold and hydrogen sulfide gas.

Reactants react together during reactions to arrive at products.

In this case, solid gold (III) sulfide and hydrogen gas react according to the following equation:

[tex]Au_2S_3(s) + 3 H_2 (g)-- > 2 Au(s) + 3H_2S(g)[/tex]

Reactants = solid gold (III) sulfide, hydrogen gas

Products: pure solid gold, hydrogen sulfide gas

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Answer:

According to mass and volume,  block density is 2 g/ml

Explanation:

Density is a measure, usually used in physics and chemistry, that relates the mass and volume of a solid or compound.

In general terms, the density is directly proportional to the mass, and inversely proportional to the volume, so increasing the mass will also increase the density.

The formula used to calculate the density is

ρ = [tex]\frac{m}{V}[/tex]

Therefore, according to the mass and density of the block

ρ = [tex]\frac{12}{6}[/tex] = 2g/ml

Being the density of the block equal to 2 g/ml.

The other options are not possible, because the values given do not correspond to the result of the equation.

Answer:

The molar mass of an element is the mass in grams of one mole (6.02 x 1023 particles) of the element.

Hope it help

Explanation:

good luck