Draw the Lewis structure for sulfur tetrafluoride, SF4

Answer:

F is correct

Explanation:

When an atom or group of atoms" has more protons than electrons",it is positively charged. An atom or group of atoms that has the same number of protons and electrons is neutrally charged.

Answer: If an object that has an excess of positive electrons it is a positively charged object.

Answer:

what I don't understand anymore JJ is the best thing I think it's help with that I hope it's a pako I will be there in about a

Answer:

car horn preventing accidents

Answer:

d) car horns preventing accidents

Explanation:

the use of car horns represents sound energy in everyday life. batteries use chemical energy that is turned into electrical energy, fireplaces use thermal energy, and lights use electrical energy!

Answer:

22.25 °C

Explanation:

Determine the final temperature when a 25.0 g piece of iron at 85.0 °C is placed into 75.0 grams of water at 20.0 °C.

Explanation:

Wind helps to get out molecules of water from clothes.

In summer Ball is hard b because due to heat kinetic energy of molecules increases

The volume, in Liters, that would be required to obtain 0.500 moles of Br ions from 1.40 M FeBr2 will be 0.36 L

Recall that:

Molarity = mole/volume

In this case, molarity = 1.40 M and moles = 0.500 moles

Thus:

Volume = mole/molarity = 0.500/1.40 = 0.36 L

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Answer:

1043.5 g of air  to the nearest tenth.

Explanation:

4P + 5O2 ---> 2P2O5

4*31 g P reacts with 5*32 g oxygen

124 g   ..   ..   .   ....  .   160g oxygen

186 g   ..   ..   ..   ..   ..   (160*186)/124 g oxygen

-  so the mass of air required =  [(160*186)/124] / 0.23

= 240 / 0.23

= 1043.5 g of air.

Answer:

There are different ways to write this:

N[tex]a^{+}[/tex] + C[tex]l^{-}[/tex] + H2O

N[tex]a^{+}[/tex](aq) + C[tex]l^{-}[/tex](aq)

Explanation:

(aq) means aqueous in water, which means dissolved in water.

Hope this helps.

- profparis

The mass of fluorine that were formed is 592 mg

From the question, we are to determine the mass of fluorine formed

First, we will write the balanced chemical equation for the decomposition reaction

The balanced chemical equation for the reaction is

CaF₂ → Ca + F₂

This means

1 mole of calcium fluoride decomposes to give 1 mole of calcium and 1 mole of fluorine

Now, we will determine the number of moles of calcium produced

From the given information,

Mass of calcium produced = 625 mg = 0.625 g

Using the formula,

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

Atomic mass of calcium = 40.078 g/mol

Then,

Number of moles of calcium produced = [tex]\frac{0.625}{40.078}[/tex]

Number of moles of calcium produced = 0.01559 mole

Since

1 mole of calcium fluoride decomposes to give 1 mole of calcium and 1 mole of fluorine

Then,

0.01559 mole of calcium fluoride will decompose to give 0.01559 mole of calcium and 0.01559 mole of fluorine

∴ Number of mole of fluorine formed was 0.01559 mole

Now, for the mass of fluorine formed

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of fluorine = 38 g/mol

Then,

Mass of fluorine formed = 0.01559 × 38

Mass of fluorine formed = 0.59242 g

Mass of fluorine formed = 592.42 mg

Mass of fluorine formed ≅ 592 mg

Hence, the mass of fluorine that were formed is 592 mg.

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Answer:

The Haber process, also called the Haber–Bosch process, is an artificial nitrogen fixation process and is the main industrial procedure for the production of ammonia today. It is named after its inventors, the German chemists Fritz Haber and Carl Bosch, who developed it in the first decade of the 20th century. 

Answer:

a catalytic process for synthesizing ammonia from nitrogen and hydrogen

Explanation:

No of molecules

Note that

Answer:

[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} + 8 {H}^{ + } \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]

Explanation:

To balance any redox reaction the primary factor is to identify the species undergoing oxidation and reduction.

Below are the steps to identify species undergoing oxidation and reduction:

let's calculate oxidation number,

given reaction

[tex]{Fe}^{ + 2} +{MnO_4}^{ - 1} \rightarrow {Fe}^{ + 3} + {Mn}^{ + 2}[/tex]

Of reactant,

[tex]Fe = +2, {MnO_4}^{ - 1} \\ Let \: oxidation \: of \: Mn \: is \: x \: and \: Oxygen -2 \\ {MnO_4}^{ - 1} \rightarrow \: x + 4 \times ( - 2) = - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x + - 8 = - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x = + 8 - 1 \\ {MnO_4}^{ - 1} \rightarrow \: x = + 7 \\ \fbox{ Mn \: +7, O \: -2}[/tex]

Of product,

[tex]\fbox{Fe \: +3, \: Mn \: +2}[/tex]

Now calculate the change in oxidation number

[tex]Fe = +3-(+2) = +1 \\ Mn = +2-(+7) = -5[/tex]

now balance the increase in oxidation number and decrease in oxidation number,

thus we require 5 Fe for 1 MnO4-,

Now putting these numbers as their coefficient,

[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2}[/tex]

now balance oxygen atom on product side by adding water,

since there are 4 oxygen atoms in reactants 4 water molecules will be there on product side.

[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]

now balance Hydrogen atom on reactant side by adding H+ ion, since there are 4 water molecules on product 8 H+ ion will be in reactants!

[tex]5{Fe}^{ + 2} +1{MnO_4}^{ - 1} + 8 {H}^{ + } \rightarrow 5{Fe}^{ + 3} + 1{Mn}^{ + 2} + 4H_2O[/tex]

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Confirming the balanced reaction, by checking number of atoms and charge on reactant vs Product side.

Total number of Fe on reactant and product = 5

Total number of Mn on reactant and product= 1

Total number of Oxygen on reactant and product = 4

Total number of hydrogen on reactant and product= 8

Total charge on reactant side= 5×(+2)-1+8=17

Total charge on product side = 5×(+3)+1×(+2)=17

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

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If 6 units of AB were reacted with 10 units of CD in the described equation, the limiting reactant would AB

They are reactants that determine how far a reaction can go in terms of yield.

From the equation: 3AB + 4CD --> 2AD + 6CB

The mole ratio of AB to CD is 3:4

Thus, 6 units of AB will require 8 units of CD.

But 10 units of CD were reacted with only 6 units of AB. This means that CD is in excess by 2 units while AB will limit the yield of the reaction.

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The corresponding change in pressure in atm is 0.285 atm.

To solve the question, we need to know what pressure is.

This is the force per unit area acting on a surface.

The change in pressure in the mercury barometer is given by ΔP = ρgh where

So, ΔP = ρgh

= 13600 kg/m³ × 9.8 m/s² × 0.217 m

= 28921.76 kg/m-s²

= 28921.76 N/m²

= 28921.76 Pa

Since 1 atm = 101325 Pa

28921.76 Pa = 28921.76 Pa × 1 atm/101325 Pa

= 0.285 atm

So, the corresponding change in pressure in atm is 0.285 atm.

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Answer:

ik that its not 48 because i answerd 48 and i got it wrong and im pretty sure its also not 144

Explanation:

From the calculations and the data given, the volume of the triangular prism is 24 m3.

The trangular prism is a prismatic figure that has a trianguar base. We know that the formula for the volume of a triangular prism is;

V = 1/2 a c h

Now;

a =  2 m

b =  3 m

h =  8 m

V = 1/2 * 2 m *  3 m * 8 m

= 24 m3

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Answer:

they share electrons to complete eachothers outer shell

Explanation:

Answer:

car hornsss

Explanation:

they loud asl

Both ionization energy and electron affinity are opposite processes to each other because of their functions.

The main difference between electron affinity and ionization energy is that electron affinity refers to the amount of energy released when an atom gains an electron while on the other hand, ionization energy is the amount of energy required to remove an outermost electron from an atom.

So we can conclude that both ionization energy and electron affinity are opposite processes to each other because of their functions.

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Answer:

Have some attraction towards each other

Explanation:

Gases deviate from the ideal gas behavior because their molecules have forces of attraction between them. At high pressure, the molecules of gases are very close to each other so the molecular interactions start operating and these molecules do not strike the walls of the container with full impact.

Hope this helps :-)

Have a great rest of your day or night!

Enjoy your studies and assignments

<3 simplysun

ps. I do not own any of these answers so please don't give full credit to me

Answer:

n S = 60 32 = 1.875 , n_S=\tfrac{60}{32}=1.875, nS=3260=1.875, n O = 40 16 = 2.5.

Explanation:

The volume of carbon dioxide produced if 8.45 g of propane is burned would be 12.9 L

From the equation of the burning:

[tex]C_3H_8+ 5O_2 -- > 4H_2O+ 3CO_2[/tex]

The mole ratio of propane burned to carbon dioxide produced is 1:3.

Mole of 8.45 g propane = 8.45/44.1 = 0.19 moles

Equivalent mole of carbon dioxide produced = 0.19 x 3 = 0.57 moles

1 mole of any gas at STP = 22.4 L

0.57 moles of carbon dioxide at STP = 22.4 x 0.57 = 12.9 L

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A coarse particle has a diameter of 1x10-6m. a nanoparticle has a diameter of 1.6 x 10-9m. Calculate how many times bigger the diameter of the coarse particle is than the diameter of the nanoparticle

Taking into account the Ideal Gas Law, the mass of nitrogen gas collected is 21.1 grams.

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of gases:

P×V = n×R×T

In this case, you know:

Replacing in the ideal gas law:

2 atm ×20 L = n×0.082 [tex]\frac{atm L}{molK}[/tex] ×323 K

Solving:

n= (2 atm ×20 L) ÷(0.082 [tex]\frac{atm L}{molK}[/tex] ×323 K)

n= 1.51 moles

Being the molar mass of nitrogen 14 g/mole, that is the amount of mass that a substance contains in one mole, the mass of nitrogen gas collected is calculated as:

[tex]mass of nitrogen gas=1.51 molesx\frac{14 grams}{1 mole}[/tex]

mass of nitrogen gas= 21.1 grams

Finally, the correct answer is option A.: the mass of nitrogen gas collected is 21.1 grams.

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Answer:

contact process, modern industrial method of producing sulfuric acid; it has largely replaced the chamber, or lead-chamber, process. Sulfur dioxide and oxygen, passed over a hot catalyst, unite to form sulfur trioxide, which in turn combines with water to make sulfuric acid.

Answer:

At home, a water hammer may occur when a dishwasher, washing machine or toilet shuts off water flow. The result may be heard as a loud bang or repetitive banging since the shock wave travels back and forth in the plumbing system.

Answer:

270 g of water

Explanation:

Answer:

37.5 moles of O2 needed

Explanation:

2 moles of  C6H6   need   15 moles of O2

5/2  * 15 = 37.5   of O2 needed