Will an atom gain or lose an electron? CER

Answer:

double replacement

Explanation:

Answer: A dilation with rule: [tex](x,y)\to(\dfrac12x,\dfrac12y)[/tex]

Explanation:

A dilation is a non-rigid transformation that creates an image that is the same shape as the original but has a different size.

It uses a scale factor k such that

[tex](x,y)\to(kx,ky)[/tex]

(x,y)= coordinates of original figure

(kx,ky) = corresponding coordinate in the image.

To transform: A (3,-4) onto point A' (1.5,-2).

Using scale factor k= [tex]\dfrac12[/tex], we have

[tex]A(3,-4)\to A'(\dfrac12\times3, \dfrac12\times-4)=A'(1.5,-2)[/tex]

Required rule: [tex](x,y)\to(\dfrac12x,\dfrac12y)[/tex]

Answer:

How can drying a hydrate help you determine its mole ratio of water to salt?

Explanation:

When we are investigating the mole ratio of a hydrate by heating we can have some scientific  questions to solve here, like how much heat energy is needed to dry the hydrate of specified quantity, similarly how the evaporation helps to determine the mole ratio?

Some compounds easily absorbs water molecules into them and forms hydrates that are compounds associated with water molecules. The property getting moisture easily is called deliquescence.

There are many compounds which able to form hexahydrates, penta hydrates, dihydrates etc. The mole ratio with water depends on the nature of the compound and mostly to the bond type.

By heating the hydrates can be dried by evaporation of water. But the temperature used to evaporate varies with the water content. Thus, question we can have here, is how heating helps to find mole ratio and how heat energy is used to make it dry.

To find more on hydrates, refer here:

https://brainly.com/question/11202174

#SPJ2

Answer:

Ferrate (VI)

Explanation:

Explanation:

this are answers

Answer:

A) The solubility of NH3 increases, and the

solubility of KCl increases.

Explanation:

The solubility of ammonia and potassium chloride increases with decrease in temperature from 40°C to 20°C.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

Learn more about solubility,here:

https://brainly.com/question/29589228

#SPJ2

Answer:

A sample of helium gas has a volume of 620mL at a temperature of 500 K. If we ... to 100 K while keeping the pressure constant, what will the new volume be?

Explanation:

A sample of helium gas has a volume of 620. Ml at a temp of 500 K. If we decrease the temperature to 100K while keeping the pressure constant 124 ml will the new volume be.

Volume is a measurement of three-dimensional space that is occupied. It is frequently expressed quantitatively using SI-derived units, as well as several imperial or US-standard units. Volume and the notion of length are connected.

The capacity of an object is measured by its volume. For instance, a cup's capacity is stated to be 100 ml if it can hold 100 ml of water in its brim. The quantity of space occupied by a three-dimensional object can also be used to describe volume.

According to Charles' Law, at constant pressure,

V1 / T1 = V2 / T2

V1 = 620 ml and T1 = 500K, V2 = ? , T2 = 100K

620 ml / 500K = V2 / 100K

V2 = ( 620 ml ) ( 100K ) / 500K

Volume = 124 ml

Thus, If we decrease the temperature to 100K while keeping the pressure constant 124 ml will the new volume be.

To learn more about volume, follow the link;

https://brainly.com/question/1578538

#SPJ2

No, air is not a pure substance. Because air contains other gases like Nitrogen, Carbon monoxide etc..,

Answer:

Cell Wall

Explanation:

In plant cells, the cell wall is rigid the outer structure that protects the plant cell.

Answer:

44.8 g

Explanation:

Density = mass / Volume

Mass = density x Volume = 8.96x 5 = 44.8 g

Answer: Synthesis

0.84 moles of oxygen

25 moles of [tex]Fe_2O_3[/tex]

Explanation:

The balanced chemical equation is:

[tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]

This is a synthesis reaction as one product is formed by combination of two reactants.

According to stoichiometry :

a. 2 moles of [tex]Fe_2O_3[/tex] require = 3 moles of [tex]O_2[/tex]

Thus 0.56 moles of [tex]Fe_2O_3[/tex] require=[tex]\frac{3}{2}\times 0.56=0.84moles[/tex]  of [tex]O_2[/tex]

b. 4 moles of [tex]Fe[/tex] give = 2 moles of [tex]Fe_2O_3[/tex]  

Thus 50 moles of [tex]Fe[/tex] give =[tex]\frac{2}{4}\times 50=25moles[/tex]  of [tex]Fe_2O_3[/tex]

Answer:

Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and a rubber ball dropped together. Air resistance causes the feather to fall more slowly, while the ball falls more fast.

Answer:

A force pair is a couple of forces which are acting on any given body from opposite directions called action-reaction forces.

One can simply identify the force pair by identifying two objects which are interacting and by describing who is pushing whom and by identification of their drawing.

A book resting on table has two participants, a book applying force downwards due to gravity and the table pushing it away from the earth surface. These are action and reaction forces.

Answer:

A. Shivering

Explanation:

This is the job of the excretory system. You remove waste as a gas (carbon dioxide), as a liquid (urine and sweat), and as a solid. Excretion is the process of removing wastes and excess water from the body. Recall that carbon dioxide travels through the blood and is transferred to the lungs where it is exhaled.

?????????????????????????.

Answer: 1.31 × 10^47 sorry if its not the answer

Explanation:

Answer:

single replacment

Explanation:

Answer: Thermal Energy

Explanation:

Answer:

True

Explanation:

The given chemical equation is balanced as it has equal number of atoms of each element on both sides.Hence it is true.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

Learn more about chemical equation,here:

https://brainly.com/question/30087623

#SPJ6

Answer:

D. How several food chains are related

Explanation:

Answer:

molar mass of zn( no3) 2

is 189.36 g/ mol

Answer:

[Ar] 3d¹⁰ 4s² 4p²

Explanation:

Answer:

B

Explanation:

Brainlest is apprciatedddddddddddd

Answer:

The answer is 1.5 atm

Explanation:

Answer:

To support the body, protect the organs, produce blood cells, and store calcium.