11 Jamila and Ahmed investigate displacement reactions
They put drops of different solutions into the dimples of a spotting tile.
They then add metals to each solution
The diagram shows their experiment.
zinc magnesium copper
metal metal metal
iron
metal
dimple
zinc nitrate
solution
♡
magnesium nitrate
solution
♡
» 2
Кеу
copper nitrate
solution
empty dimple
2
iron nitrate
solution
dimple with
metal and solution
spotting til
(a) Jamila and Ahmed look to see if a reaction takes place.
Suggest what they might see if a reaction takes place.

Ionic compound is defined as those which contains ion and are held together by the attractive forces among the oppositely charged ions.

The names of the ionic compounds is given above and is the most appropriate answer.

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Catabolic reactions break down large organic molecules into smaller molecules, releasing the energy contained in the chemical bonds. These energy releases (conversions) are not 100 percent efficient. The amount of energy released is less than the total amount contained in the molecule.

[tex]\\ \rm\longmapsto 3Mg+N_2\longrightarrow M_3gN_2[/tex]

Moles of Mg:-

[tex]\\ \rm\longmapsto \dfrac{2.4}{24}=0.1mol[/tex]

Here

B. Metal is a better conductor then cramic

nice to help you-!

Answer: The water Inside the cell is stored inside the vacuole(s)

Explanation:

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Answer: the number of a chemical element in the periodic system,

Explanation:

Answer:

A. Cl

Explanation:

because chlorine is an halogen so it needs only one electron in order for it to obtain a full outer shell.

Hope you could understand.

If you have any query, feel free to ask.

The heat of reaction is 180 kJ/mol hence the reaction is endothermic.

Bond energy is the energy that is required to form a bond and must be supplied in order to break the bond. In the question, we are told that the energy of the reactants is 860 kJ/mol and the bond energy of the products is 680 kJ/mol.

Heat of reaction = Bond energy of reactants - Bond energy of products

= 860 kJ/mol - 680 kJ/mol = 180 kJ/mol hence the reaction is endothermic.

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Answer:

c

Explanation:

plants decrease the levels of carbon dioxide in the atmosphere due to the process of photosynthesis

From what we know we can confirm that currently, the primary source of sulfur dioxide of emissions into the atmosphere is coal and other fossil fuel burning in industry.

From what we know, this compound has proved to be quite toxic for humans to breathe. Increased concentrations of this in the atmosphere lead to increased rates of lung disease among other health complications.

Therefore, we can confirm that the primary source of sulfur dioxide of emissions into the atmosphere is coal and other fossil fuel burning in industry.

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Answer:

C. an ether

Explanation:

Answer:

Krypton

Explanation:

It is a noble gas, so it isn't reactive since it already has 8 valence electrons.

Answer:

A. Karl Landsteiner is the most likely for her to mention.

Answer:

D

Explanation:

if they didn't all use accounting skills and info I'd be considered

We can confirm that the diameter of the double helix structure of DNA stays the same because hydrogen bonding is always between the A and T bases and the G and C bases.

The AGCT bases in DNA are the nucleotides that comprise it. These nucleotides include

By always bonding adenines with thymine and Guanine with cytosines, the DNA strand maintains a constant diameter.

Therefore, we can confirm that the diameter of the double helix structure of DNA stays the same because hydrogen bonding is always between the A and T bases and the G and C bases.

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Answer:

what do you need help with .

Explanation:

?

Answer:

Based on stoichiometry HNO3 to H2O is 6:2

Use 9 grams to find the moles of HNO3

9 grams/63g/mol=0.143 moles of HNO3

HNO3:H2O

6:2

0.143*2/6=0.048

H2O moles is 0.048moles

Mass of water =0.048moles*18g/mol=0.864g

To the nearest tenth=0.9grams

( sorry if its not right)

Answer:

If the speed is increasing, the car has positive acceleration. When the car slows down, the speed decreases. The decreasing speed is called negative.

Answer:

Option B

Explanation:

All people who are asked to testify in a criminal case must first be issued a subpoena by law enforcement, is a "false statement" or option B. A subpoena is a request to appear in court which is usually given out by the attorneys who are a part of the case, the law enforcement does not give out subpoenas, so this is indeed a false statement.

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Answer: B

Explanation:

Answer:

B,) a carboxylic acid and an amine

Explanation:

A functional group is an atom or group of atoms inside a molecule that has comparable chemical properties anytime it appears in numerous compounds. When other parts of the molecule are not similar, some functional groups react in certain manners.

Carboxylic acid is a carbonyl-containing functional group, with carbon atom bonded to an hydroxyl group on one side and on the other side is either a carbon or hydrogen atom.  

An amine group is composed of a nitrogen atom bonded to a combination of carbon and hydrogen atoms.

Answer:

a carboxylic acid and an amine

Explanation:

Answer: that all thre water cycle and C is vaporation

Explanation:

The chemical equilibrium has the concentration of reactants and products equal. The addition of NaCl shifts the equilibrium towards the left, leading to soap precipitation.

The chemical equation for the reaction is:

[tex]\rm C_{17}H_{35}COONa\;\leftrightharpoons C_{17}H_{35}COO^-\;+\;Na^+[/tex]

The addition of NaCl to the reaction results in the dissociation of Na and Cl ions.

At the equilibrium condition, the concentration of all the species is equal. The addition of NaCl results in an increase in the product concentration in the solution, with the common ion effect.

The increase in the product concentration results in the reaction moving towards the reactant formation and process in the left direction.

Thus, the addition of NaCl shifts the equilibrium towards the left, leading to soap precipitation. Thus, option B is correct.

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Answer:

the correct answer is (B The equilibrium will shift to the left to such an extent that it leads to the precipitation of solid soap.)

i just took the test

Explanation:

This problem is providing a chemical reaction between 0.15 mol of copper and 0.38 mol of HCl and asks for the moles of HCl that are left over. At the end, the answer turns out to be 0.08 mol.

In chemistry, we define stoichiometry as a tool allowing to calculate mole-mass or mole-mole relationships between different species involved in a chemical reactions.

In this case, for 0.15 mol of copper and 0.38 mol of HCl one can apply a mole ratio in order to calculate the moles of HCl consumed by the former, considering the 1:2 mole ratio between them:

[tex]0.15 molCu*\frac{2mol HCl}{1molCu} \\\\=0.30 mol HCl[/tex]

This means that if 0.30 moles of HCl react and 0.38 moles are available, there is a left over or unused moles of:

[tex]leftover=0.38mol-0.30mol\\\\leftover=0.08mol[/tex]

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C)Plasma

.............this was for 20 characters to submit the answer-dont mind this

Matter exists in three different physical states, namely solid, liquid and gaseous state. The plasma is also an another state of matter. The correct option is C.

The plasma is defined as the fourth state of matter. It is a hot ionized gas which consists of approximately equal numbers of positively charged ions and negatively charged electrons. It is not same as the neutral gas.

Since plasma contains electrically charged particles, they are strongly influenced by the magnetic and electric fields while the neutral gases are not. Like gases plasmas have no fixed volume or shape.

The density of plasma is also found to be less than solids or liquids. The plasma is known as a charged gas with strong electrostatic interactions. It is the plasma which make up the sun and stars and it is the most common state of matter in the universe as a whole.

Thus the correct option is C.

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