Rolf prepares four solutions using different solutes as shown in the table below.
Which solution is unsaturated?



Solution A
Solution B
Solution C
Solution D

Answer:

177.3kg C₂₁H₄₄

Explanation:

Based on the chemical reaction:

C₂₁H₄₄ → 3C₂H₄ + C₁₅H₃₂

Where 1 mole of C₂₁H₄₄ produce 3 moles of ethene, C₂H₄.

To solve this question we need to determine the moles of ethene in 50.4kg. 1/3 these moles are the moles of C₂₁H₄₄ that must be added:

Moles Ethene -Molar mass: 28.05g/mol-

50.4kg = 50400g * (1mol / 28.05g) = 1796.8 moles of ethene

Moles C₂₁H₄₄:

1796.8 moles of ethene * (1 mol C₂₁H₄₄ / 3 mol C₂H₄) = 589.93 moles C₂₁H₄₄

Mass C₂₁H₄₄:

589.93 moles C₂₁H₄₄ * (296g / mol) = 177283g =

Answer: [tex]1s^22s^22p^63s^23p^64s^2[/tex] , oxidation state = +2

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom. The electrons are filled according to Afbau's rule in order of increasing energies.

The electronic configuartion of Calcium with atomic number 20  is :

[tex]Ca:20:1s^22s^22p^63s^23p^64s^2[/tex]

As calcium can easily lose its two valence electrons to attain stability , its oxidation state is +2.

[tex]Ca^{2+}:18:1s^22s^22p^63s^23p^6[/tex]

The mole ratio Aluminium to Aluminum Oxide is 2 : 1

Given

Reaction

2Al + Fe ----> Al2O3 +2Fe

Required

The mol ratio

Solution

If we look at the reaction above, there is an element missing from the reactant i.e oxygen, because the number of atoms and elements involved in the reaction should be the same between the reactants and products.

So the possible and balanced reactions are:

2Al(s) + Fe₂O₃ (s)  →  Al₂O₃ (s)+ 2Fe (s)

From this reaction the ratio of Al: Al₂O₃ can be determined, which is 2: 1

Answer:

121.11m/s²

Explanation:

Given parameters:

Force   = 525N

Mass = 4.5kg

Unknown:

Acceleration  = ?

Solution:

From Newton's second law of motion, we can find the solution to this problem. Using the expression below:

       F  =  m x a

F is the force

m is the mass

a is the acceleration

      So'

              525  = 4.5 x acceleration

            Acceleration = 121.11m/s²

Answer:

Thermal heating and cooling

Explanation:

This process described results from thermal heating and cooling as a mechanism of mechanical weathering of rock bodies.

There is no answer, science is about empirical knowledge, technology is the sum of techniques, skills, methods, and processes. I do not believe that you will find a answer for that.

Answer: d. Ion-dipole

Explanation:

Answer:

I'm pretty sure the volume decreases because the volume is like how much space it takes up. Sorry if im wrong.

Answer:

a) filtrate: a liquid which has passed through a filter.

Explanation:

the other one didnt pop up

Answer:

Transform boundary

Explanation:

The boundary that is a site of recurring earthquake and faulting activities is the transform boundary.

At a transform boundary, there is a significantly high prevalence of earthquakes and faulting.

Answer:

Halogens

Explanation:

From the given choices, the halogens will have the smallest radius within the same period.

The size of an atom is estimated by the atomic radius. This is taken as half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance between two nuclei in the solid state.

Since halogen is the right most group from the choices given, it will have the smallest radius.

Answer: Digestive enzymes play a key role in breaking down the food you eat. These proteins speed up chemical reactions that turn nutrients into substances that your digestive tract can absorb. Your saliva has digestive enzymes in it

Explanation:

Answer:

that's ur answer cumulus clouds I hope it helps

Answer:

a. 69.5% and 30.5%

Explanation:

we know there are two naturally occurring isotopes of Mg, Mg-24  and Mg-25.

First of all we will set the fraction for both isotopes

X for the isotopes having mass 25

1-x for isotopes having mass 24

The average atomic mass of Mg is 24.305 amu.

we will use the following equation,

25x + 24 (1-x) =  24.305

25x + 24 - 24x =  24.305

25x- 24x = 24.305 - 24

1x = 0.305

x= 0.305 /1

x= 0.305

0.305 × 100 = 30.5 %

30.5 % is abundance of Mg-25 because we solve the fraction x.

now we will calculate the abundance of Mg-24.

(1-x)

1-0.305 =0.695

0.695  × 100 = 69.5%

69.5%   for Mg-24.

Answer:

D

Explanation:

Since the negative particles are going towards the negative section and the positive particles are leaving the positive section. Additionally, opposite charges attract each other and like charges repel each other.

There will be attraction between the opposite charges and repulsion among the like charges. Here the diagram D shows a correct interaction between the fields of two charged particles.

The electric force acting per unit charge is defined as the electric field. They are generally produced by changing the electric charges or magnetic fields. The electric field strength is expressed in volt per meter (V/m).

E = F/Q

In an electric field it is the electric charge which provides the direction of field. If the charge is negative, then the field is directed towards the charge. A field is directed away from the charge if the charge is negative.

All the electric fields start form a positive charge and end on a negative charge. If two positive charges interact then there will be repulsion between them. But if a positive charge interact with a negative charge then there will be attraction among them.

In diagram D there is an attraction between the opposite charges.

Thus the correct option is D.

To know more about the electric field lines, visit;

https://brainly.com/question/28128803

#SPJ5      

Answer:

exosphere thermosphere mesosphere stratosphere troposphere

Answer:

A

Explanation:

Atoms of elements can lose or gain electrons making them no longer neutral, they become charged. A charged atom is called an ion. When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons.

Answer:

Covalent bond is formed by mutual sharing of electrons between two atoms

Explanation:

Answer:

Well ice cubes are normally liquids but it is frozen water making it a solid. Since they are made of water particles, they wouldn't normally be a solid, but the particles are packed close enough together to make it one. Hope this helps! :D

Explanation:

Answer: It most likely represents a canyon.

Answer:

calcium chloride and silver nitrate

Explanation:

A precipitate is often formed in a double replacement reaction when the reaction yields an insoluble product.

Consider the reaction between calcium chloride and silver nitrate;

CaCl2(aq) + 2AgNO3(aq) -------->2AgCl(s) + Ca(NO3)2(aq)

AgCl is insoluble in water, hence the reaction leads to the formation of a precipitate.