What is the name of this molecule?

Answer:

Polar Covalent Bonds. A polar covalent bond exists when atoms with different electronegativities share electrons in a covalent bond. Consider the hydrogen chloride (HCl) molecule. Each atom in HCl requires one more electron to form an inert gas electron configuration.

Explanation:

Answer:

2 atoms

Explanation:

Answer:

bobo ang brainly

Explanation:

kasi hindi nya binibigay a ng tamang question

Answer: Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.

Explanation:

When evaporation takes place in sea water then of course there will occur an increase in salinity.

But as this evaporated water is replaced by water coming from rivers. As a result, the raising salinity is counter balanced by the water coming from rivers.

Hence, salinity remains balanced in sea water.

Thus, we can conclude that because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.

so the other guy can have branliest have a wonderful summer guys! :)

Answer:

no

Explanation:

because the characters are invalid

Answer:

no

Explanation:

because they are not valid

Answer:

8.99×10^-7m

Explanation:

The wavelength can be calculated using the expression below

E=hcλ

Where E= energy= 2.21 x 10^-19 J.

C= speed of light= 3x10^8 m/s

h= planks constant= 6.626 × 10^-34 m2 kg / s

E=hcλ

λ= E/(hc)

Substitute for the values

λ=( 2.21 x 10^-19 )/(6.626 × 10^-34 × 3x10^8 )

= 8.99×10^-7m

Answer:

Look at the explanation this one is hard

Explanation:

show your work:

E = hc/ λ

E λ = hc

λ = hc/E

λ = 6.626 x 10^-34 x 3 x 10^8 / 2.21 x 10^-19  

=

8.994 x 10-7 m or 899.4 nm

800nm – 3mm is the range of wavelengths for infrared waves.

Night vision cameras use infrared waves.

Answer:

HF(aq)+NaOH(aq)→NaF(aq)+H2O(l)

Explanation:

Complete question

Dissolved hydrofluoric acid reacts with dissolved sodium hydroxide to form water and aqueous sodium fluoride. What is the net ionic equation

Equilibrium equation between the undissociated acid and the dissociated ions

HF(aq)⇌H+(aq)+F−(aq)

Sodium hydroxide will dissociate aqueous solution to produce sodium cations, Na+, and hydroxide anions, OH−

NaOH(aq)→Na+(aq)+OH−(aq)

Hydroxide anions and the hydrogen cations will neutralize each other to produce water.

H+(aq)+OH−(aq)→H2O(l)

On combining both the equation, we get –  

HF(aq)+Na+(aq)+OH−(aq)→Na+(aq)+F−(aq)+H2O(l)

The Final equation is  

HF(aq)+NaOH(aq)→NaF(aq)+H2O(l)

Answer:

Explanation:

The pH of a solution can be found by using the formula

[tex]pH = - log ([ {H}^{+} ])[/tex]

From the question

[H+] = 0.045 M

We have

[tex]pH = - log(0.045) \\ = 1.346787...[/tex]

We have the final answer as

Hope this helps you

Answer:

1.35

Explanation:

Answer:

I dont see the image

Explanation:

pls make it close up

Answer:

1. Hot air rises and cold air descends for exactly the same reason

Matter are anything that is made up of atoms. The quantity of matter can be seen only on the basis of mass and volume calculation. Therefore, warm air rise and cold air sink.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science.

Matter is anything that is made up of atoms. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter.

Warm air rises while cold air descends. This is because hotter air takes more energy than cooler air. Furthermore, hot and cold temperatures are precisely proportionate to their density. As a result, when it's really hot, the hotter air is more likely to rise than when it's very cold.

Therefore, warm air rise and cold air sink.

To learn more about matter, here:

https://brainly.com/question/4562319

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Answer:

faults are wrong or disallowed options or suggestions.

Answer:

1 hour

Explanation:

Travelling at 15 miles per hour will get take 1 hour to travel 15 miles.

Answer:

Explanation:

The answer is B  heavy nucleus splits into two smaller nuclei

Answer:

According to Dalton's law of partial pressures, the total pressure by a mixture of gases is equal to the sum of the partial pressures of each of the constituent gases. The partial pressure is defined as the pressure each gas would exert if it alone occupied the volume of the mixture at the same temperature.

Answer:

Sorry for the wrong answer plz

99% was the percent yield of the reaction. So, the correct option is A.

Percent yield is defined as the percentage ratio of the actual yield to the theoretical yield. It is a measure of the amount of moles of product formed in relation to the reactant obtained in a chemical reaction, expressed as a percentage.

For percent yield, we have to first find the number of moles.

1 Mg(S) + 2 HCl(Aq) → 1 MgCl2(Aq) + 1 H2(G)

Mole of Mg (s)= Mass of Mg/ Molar mass

=48/24= 2 moles

Moles of HCl= 73/36.5= 2moles

So, 1 mole of Mg reacts with 2 moles of HCl as per the equation which means HCl is the limiting reagent. Mg will act as excess reagent so only 1 mole of Mg will react while the unreacted Mg will be 24g i.e. 1 mole.

The product which is experimental= 120-24= 96g

Theoretical product formed= 1mole of [tex]MgCl_2[/tex]+ 1 mole of HCl= 95+2= 97gm/mole

Percentage Yield = (experimental Yield / Theoretical Yield) × 100 %

= (96/97)*100 = 98.96% which is approx. 99%

Thus, 99% was the percent yield of the reaction. So, the correct option is A.

Learn more about Percent yield, here:

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Your question is incomplete, most probably the complete question is:

The Following Reaction Is Carried Out:

1 Mg(S) + 2 HCl(Aq) → 1 MgCl2(Aq) + 1 H2(G)

The Initial Masses Of The Uncombined Reactants appear below:

Mass of magnesium- 48g

mass of hydrochloric acid= 73g

The reactants are combined and the final mass of the system is determined. If the final mass of the system is 120g, what was the percent yield of the reaction?

Answer:

2.5 moles of Al

Explanation:

We'll begin by calculating the number of mole in 127 g of Al₂O₃. This can be obtained as follow:

Mass of Al₂O₃ = 127 g

Molar mass of Al₂O₃ = 101.961 g/mol

Mole of Al₂O₃ =?

Mole = mass / molar mass

Mole of Al₂O₃ = 127 / 101.961

Mole of Al₂O₃ = 1.25 mole

Finally, we shall determine the number of mole of Al that reacted. This can be obtained as follow:

4Al + 3O₂ —> 2Al₂O₃

From the balanced equation above,

4 moles of Al reacted to produce 2 moles of Al₂O₃.

Therefore, Xmol of Al will react to produce 1.25 moles of Al₂O₃ i.e

Xmol of Al = (1.25 × 4)/2

Xmol of Al = 2.5 moles.

Thus, 2.5 moles of Al is needed for the reaction.

Answer:

Explanation:

Wind is more of an efficient power source than solar. Compared to solar panels, wind turbines release less CO2 to the atmosphere, consume less energy, and produce more energy.

B.

Replace sentence 4 with: In addition, some readers were concerned that the technical details about robots would not be of interest to most students.

Explanation:

i just did the test

Answer:

It's B.

Explanation:

Answer:

n = 2

Explanation:

To solve this question we must find the moles of the anhydrate CuCl2 (Obtained from the mass of 19.72g) and the moles of water (Obtained from the 5.32g):

Moles CuCl2 -Molar mass: 134.45g/mol-

19.72g * (1mol / 134.45g) = 0.14667 moles

Moles H2O -Molar mass 18.01g/mol-

5.32g * (1mol / 18.01g) = 0.2954 moles

The ratio of moles of H2O:CuCl2 is:

0.2954 moles / 0.14667moles = 2.0

That means n = 2 and the formula is:

CuCl2∙2H2O

Answer:

A. 1:1

Explanation:

The ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound is 1:1 because sodium needs to lose one electron and bromine needs one electron to become stable and complete its outermost shell. When sodium lose electron, it become cation and gain +1 charge while on the other hand, the bromine accept one electron and become anion and gain -1 charge so that's why we can say that there is 1:1 of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound.

Answer:

mechanical energy to electrical energy

Explanation:

The water turns the turbine with produces mechanical energy so the generator converts it to electrical energy

Answer:

Tough outer shell

Explanation:

Three types of space suits based on their purpose are IVA (Intravehicular activity), EVA (extravehicular activity), and IEVA (intra/extravehicular activity)

Space suits have an outer layer known as the Integrated Thermal Micrometeoroid Garment also known as the TMG or ITMG

The functions of the TMG includes the provision of an insulation medium to the wearer of the suit thereby preventing loss of heat and keeping the wearer warm, protect the wearer from solar radiation which are harmful as well as from Micrometeoroid and debris orbiting in space known as MMOD

The outermost layer of the EMU TMG suits is white Ortho-Fabric that consists of Nomex, Kevlar and Gore-Tex, making it fire resistant, very strong and very tough, and water proof as well as breathable.

Answer:

The relative molecular mass of ammonium nitrate is 80 gm

Explanation:

[tex]M_{NH4NO3}[/tex] = 14 + (4 × 1) + 14 + (16 × 3) = 80 (gm)

Explanation:

c.

[tex]from \\ \frac{P _{1} V _{1} }{T _{1}} = \frac{P _{2} V _{2}}{T _{2}} \\ \frac{2 \times 75}{(10+273)} = \frac{V _{2} \times 1}{(35+273)} \\V _{2} = \frac{2 \times 75 \times (35+273)}{(10+273) \times 1} \\ V _{2} = 163 \: ml[/tex]

Answer:

Sorry I really don't know but can you help with one of my question I posted please thanks.

Answer:

A

Explanation:

A spontaneous reaction doesn't require any addition of heat.

The rest of the choices require a transfer of heat energy.

Answer:

Your answer choice is D

Explanation:

I just got it right on USATestprep :))

Answer:

The theoretical yield of sulfur trioxide is 88.0 Litres

Explanation:

The chemical reaction occurring between oxygen and sulfur dioxide is given in the chemical equation below :

2SO₂ + O₂ ----> 2SO₃

From the equation of reaction, 2 moles of sulfur dioxide reacts with 1 mole of oxygen to produce 2 moles of sulfur trioxide.

Volume of 1 mole of a gas at STP is 22.4 L

Number of moles of gas in 44.0 L = 44.0/22.4 moles

1 mole of oxygen reacts with 2 moles sulfur dioxide to produce 2 moles of sulfur trioxide;

44/22.4 moles of oxygen will react with excess sulfur dioxide to produce 2 × 44/22.4 moles of sulfur trioxide = 88/22.4 moles of sulfur trioxide

88/22.4 moles of sulfur trioxide will have a volume of 88/22.4 × 22.4 Litres = 88.0 Litres

Therefore, the theoretical yield of sulfur trioxide is 88.0 Litres