CHEMISTRY HIGH SCHOOL

5.This ancient element symbol
means ...
A. copper
B. silver
c. gold
D. tin

Answers

Answer 1
Answer:

Answer:

A im pretty sure

Explanation:

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water is mixed with solid calcium nitrate in a beaker. write balanced net ionic equation for the reaction

Answers

When calcium nitrate is added or mixed with water, the substance would dissociate into its corresponding ions which are calcium and nitrate ions. The ionic equation would be:

Ca(NO3)2 = Ca2+ + NO3-

Hope this answers the question. Have a nice day. Feel free to ask more questions.

Answer : The net ionic equation will be,

Ca^(2+)(aq)+2OH^(-)(aq)\rightarrow Ca(OH)_2(s)

Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The balanced ionic equation will be,

2H_2O(aq)+Ca(NO_3)_2(aq)\rightarrow 2HNO_3(aq)+Ca(OH)_2(s)

The ionic equation in separated aqueous solution will be,

4H^+(aq)+2OH^(-)(aq)+Ca^(2+)(aq)+2NO_3^(-)(aq)\rightarrow Ca(OH)_2(s)+2H^+(aq)+2NO_3^(-)(aq)

In this equation, H^+\text{ and }NO_3^- are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

Ca^(2+)(aq)+2OH^(-)(aq)\rightarrow Ca(OH)_2(s)

Which statement is true about an empirical formula?1. It is the true ratio of atoms in a formula unit.
2. It is the simplest ratio of atoms in a formula unit.
3. It represents the true molecular mass of a chemical formula.
4. It represents the highest ratio of coefficients in a chemical formula.

Answers

The statement that is true about an empirical formula is it is the simplest ratio of atoms in a formula unit. The answer is number 2. The rest of the statements do not answer the question above.

Answer:

2. It is the simplest ratio of atoms in a formula unit.

Explanation:

The empirical formula refers to how to provide the minimum proportion in which chemical elements combine into one substance. Sometimes it may happen that the minimum formula is equal to the molecular formula of the compound; However, this is not always true.  In short, the empirical formula refers to the simplest ratio of atoms in a unit of formula.

For example, the empirical or minimal formula of water is H2O, indicating that there is a 2: 1 ratio between the elements that make up water molecules. And, coincidentally, this is also the molecular formula of water.

Which of the following is the most electronegative element? a. He
b. I
c. N
d. O
e. C

Answers

none of these; the most electronegative element is fluorine because an atom of fluorine needs an additional electron to join it's outer membrane, so the atom can achieve stability.

a flourine atom on its own is always a negative ion.

A student is trying to solve the following problem by selecting the tile shown.Mass of container

Which of the following statements is true?
A. The student chose the wrong tile to solve the problem.
B. The student chose the correct tile, but needs to flip the tile to make the units cancel.
C. The student chose the correct tile, but needs to add a second tile to solve the problem.
D. There is nothing wrong. The problem is ready to be solved.

Answers

The student selected the correct tile for the problem and doesn't need to flip the tile or add another tile. The problem is ready to be solved using the chosen tile. selected the correct tile for the problem and doesn't need to flip the tile or add another tile. The problem is ready to be solved using the chosen tile.

The correct answer is option D.

The student seems to be using a tile with the following information: "1.293 metric ton + 1000 kilograms/1 metric ton" to convert the mass of the container from metric tons to grams. Given that 1 metric ton is equivalent to 1000 kilograms, this tile can be used to perform the conversion. The problem statement provides the mass of the container as 1.293 metric tons, and the student wants to find the mass in grams.

A. The student chose the wrong tile to solve the problem.

This option is not correct. The tile selected by the student is appropriate for the given problem since it allows for the conversion of metric tons to kilograms, which is a necessary step to eventually convert to grams.

B. The student chose the correct tile but needs to flip the tile to make the units cancel.

This is not the case. The tile is already set up to correctly convert from metric tons to kilograms, and subsequently to grams. There is no need to flip the tile; it is correctly oriented for the given problem.

C. The student chose the correct tile but needs to add a second tile to solve the problem.

This is not necessary either. The single tile provided by the student allows for the complete conversion from metric tons to grams.

D. There is nothing wrong. The problem is ready to be solved.

This is the correct choice. The student's tile choice is appropriate, and no additional tile is required. They can proceed to solve the problem by multiplying the given mass of the container (1.293 metric tons) by the conversion factor on the tile (1000 kilograms/1 metric ton) to obtain the mass of the container in grams.

Therefore , from the given options the correct one is D.

For more such information on:  student

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The question probable may be:

A student is trying to solve the following problem by selecting the tile shown. A container has a mass of 1.293 metric tons What is the mass of the container in grams?   1.293 metric ton + 1000 kilograms/ 1 metric ton  Which of the following statements is true? A. The student chose the wrong tile to solve the problem. B. The student chose the correct tile, but needs to flip the tile to make the units cancel. The student chose the correct tile,but needs to add a second tile to solve the problem D. There is nothing wrong. The problem is ready to be solved.  
In my opinion, the correct answer among the choices presented above is option D. A student is trying to solve the following problem by selecting the tile shown. With this method, there is nothing wrong. The problem is ready to be solved.

Then there will be an increase in the demand for most goods.If there is an increase in
А consumer price
B. production cost
C. quantity supply
D. consumer income
Please select the best answer from the choices provided
OA
OB
С
&
D

Answers

Answer:

d)consumer income

Explanation:

Answer:

D. consumer income

Explanation:

Edge 2020

The chemical properties of an element are largely determined by itsa. number of energy levels.
b. period number.
c. number of protons.
d. number of valence electrons.

Answers

The chemical properties of an element are largely determined by the number of valence electrons. Thus option D is correct.

what are valence electron ?

Valence electrons an atom is defined as the number of electron which lose or gain the nearest noble gas or inert gas electronic configuration.

The valence electrons are the main part of chemical reactions as these contain more energy as compared to the electrons present in inner orbits.

The number of valence electrons present  helps to determine the chemical properties of element like valence or valency, bonds with other elements.

It also show a picture of the mechanism of bond formation of an atom, the number of unpaired electrons and how many atoms can take part.

Learn more about valence electron, here:

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The chemical properties of an element are largely determined by its number of valence electrons. The answer is letter D. The rest of the choices do not answer the question above.
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