Which of the following pairs of elements is most likely to form an ionic bond?
A.
nitrogen and oxygen
B.
lithium and chlorine
C.
phosphorus and chlorine
D.
selenium and bromine

Answer:

1. C

2. A

3. A

Explanation:

Answer:

toda

Explanation:

:todo lo que tienes que hacer es hacer la cosa

Answer:

16.6km/h

Explanation:

Speed is distance/time.

speed for 1st event = 1/0.4 = 2.5km/h

speed for 2nd event = 50/1.5 = 33.3 km/h

speed for 3rd event = 10/0.7 = 14.28 km/h

Average speed = 2.5 + 33.3 + 14.28 /3 = 50/3 = 16.6 km/h

Answer: 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

The balanced chemical reaction is:

[tex]6HCl(aq)+2Al(s)\rightarrow 3H_2(g)+2AlCl_3(aq)[/tex]  

According to stoichiometry :

2 moles of [tex]Al[/tex] produce = 3 moles of [tex]H_2[/tex]

Thus 1.20 moles of [tex]Al[/tex] will produce=[tex]\frac{3}{2}\times 1.20=1.80moles[/tex]  of [tex]H_2[/tex]

Thus 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.

Answer:

The reddish-brown substance is a different color than the fertilizer, which is white, and the substance that makes up the pipe, which is gray. This means that they cannot be the same substance because they do not have the same properties. The atomic models show that the reddish-brown substance is made up of different repeating groups of atoms than the fertilizer and the pipe substance. The difference in atoms caused the difference in properties.

Explanation:

lul

People of westfield identifying the reddish brown substance and that substance is rust i.e. iron oxide.

Rust is a chemical compound which is formed by the oxidation reaction between iron and oxygen for the formation of iron oxide.

People of westfield observed the reddish brown color in the water, that is the rust compound which is obtained by the chemical reaction occur between the iron pipes and the compound present in the fertilizers that are present in water.

Hence, the reddish brown substance in rust.

To know more about rust, visit the below link:
https://brainly.com/question/16771450

Answer: a. BaO

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here element barium is having an oxidation state of +2 called as [tex]Ba^{2+}[/tex] cation and [tex]O^{2-}[/tex] is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]BaO[/tex]

Answer:

If I am not wrong is C x2y5

Explanation:

The concept of valency is used here to determine the formula of the ionic compounds. The number of valence electrons in 'X' is 2 and that of 'Y' is 5. The formula is X₃Y₂. The correct option is D.

The crystalline solids which are formed by neatly packed ions of opposite charges are defined as the ionic compounds. These compounds are formed by the combination of metals with non-metals.

The combining capacity of an element is given by valency. The elements belonging to the same group have the same valency. It is related to how many electrons are in the outer shell.

Here the number of valence electrons in 'X' = 2

The number of valence electrons in 'Y' = 5

The element 'X' need 6 electrons to attain the octet and 'Y' needs 3 electrons to attain the octet.

X - 6

Y - 3

The formula of the ionic compound is X₃Y₂.

To know more about ionic compound, visit;

https://brainly.com/question/3222171

#SPJ2

Answer:

Mercury chloride's(HgCI2) empirical formula is HgCI.

Explanation:

Answer:

I'm thinking its "Your friend had colder winters than you do."

Explanation:

It is not "Your friend has warmer winters than you do." Or "You Have less precipitation than your friend does." I was doing this quiz before that had this question and its not those.

In the ocean side the the winter will be colder by the ocean breeze in the day time. The location of your friend farther from the ocean will have  warmer winters than you.

Any wind that flows from a big body of water onto or onto a landmass is called a sea breeze or an onshore breeze. Sea breezes form as a result of changes in air pressure brought on by the different heat capacities of water and dry land. Sea breezes are therefore more confined than prevailing winds.

A sea breeze is frequently seen along coasts after sunrise because land warms up far more quickly than water does when exposed to solar radiation. While dry ground also cools faster than water, a land breeze or offshore breeze has the opposite effect.

In winter seasons, along with the sea breeze make the climate more colder than that in locations farther from oceans. Hence, option b is correct.

Find more on sea breeze:

https://brainly.com/question/7380142

#SPJ6

Answer: 1. 2 moles of oxygen atoms = 32 grams

2. 2 moles of oxygen molecules = 64 grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number of particles.

1 mole of oxygen atom (O) weighs = 16 g

Thus 2 moles of oxygen atom (O) weighs = [tex]\frac{16}{1}\times 2=32 g[/tex]

Also 1 mole of oxygen molecule [tex](O_2)[/tex] weigh = 32 g

Thus 2 moles of oxygen molecule [tex](O_2)[/tex] = [tex]\frac{32}{1}\times 2=64 g[/tex]

Answer:

a

Explanation:

It increases the reaction rate by lowering the activation energy for a reaction

Answer:

Well I know that the first one is true.

Explanation:

Answer:

1. TRUE

2. FALSE

3. C

Explanation:

Answer:

We can tell by how the continents look. Scientists who propose the pangea theory have said this. You can see for yourself because all the continents look like puzzle pieces you could put together. Scientists can also tell from the species. For example, let's say a scientist found a bone of a creature at the edge of a continent, the edge of another would have the same species. They have also calculated that the continents in itself are still splitting apart, but very slowly. The reason they split up was because tectonic plate movements.

Answer:

A

Explanation:

Because It's dense meaning that it doesn't burn

Explanation:

https://youtu.be/f_kgUUaMZlw

Answer:

C

Explanation:

Answer: The answer is C

Explanation:

Answer:

According to the stoichiometry, the theoretical yield is 11.5 grams. Multiplying this by 0.650, you get 7.48 grams.

Explanation:

Answer:

CO2 should be 50.88 g

Explanation:

CH4 + 2 O2  -->  CO2 + 2 H2O

First, find the moles of CH4:

Molar Mass of CH4 (formular mass):

12+1*4=16 g/mol (actually just use the atomic mass in your periodic table to add them up)

Then we can find how many moles in CH4 = 18.5÷16=1.15625 mol

As we know 1 mole of methane(CH4) makes 1 mole of CO2, so if 1.15625 moles of methane is reacted, 1.15625 moles of CO2 will be made.

So the moles of CO2 is 1.15625 moles.

Calculate the mass of CO2:

Molecular mass: 12+16*2=44 g/mol

Mass=44*1.15625=50.88 g (cor. to 2 d.p.)

Answer:

you cant answer this

Explanation:

you left something out of the question

Answer:

plants can grow in between rocks and break apart into smaller pieces

Explanation:

Answer:

There are the same number of oxygen atoms in the reactants and the products

Explanation:

However the equation is not balanced

3 Ca on one side and 1 on the other

Answer: the moons gravitational force

Explanation:

Answer:

D because it is in a fixed position

Answer:

Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature. Water at its boiling point.

Explanation:

g00gle worls

Answer:

0.0389757845886336

Explanation:

Answer:

When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.

Answer:

Two objects are in thermal equilibrium if they are in close contact that allows either to gain energy from the other.

Answer: The Objects have the same temperature

Explanation: i just took the test

Answer:

C

Explanation:

Alcoholism is the inability to control drinking due to both a physical and emotional dependence on alcohol.