Draw the electron dot structure for the hydrogen carbonate ion hco3-. Carbon is the central atom, and hydrogen is attached to oxygen in this polyatomic anion.

The author communicate that a liquid is similar to a gas due to its indefinite shape.

Gas and liquid are similar in one property which is that gas and a liquid is able to flow and take the shape of a container due to indefinite shape but both are different from one another due to the presence of definite volume of liquid which is not the property of a gas so we can conclude that indefinite shape is the property of both liquid and gas.

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Answer:

An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. Cooling a liquid decreases the speed of the molecules.

Explanation:

The nucleophile  used to react with butyl iodide to form te compound below is :

A Nucleophile is a molecule in a chemical reaction that seeks for a positive center of the reaction ( i.e. nucleus ) and this is because of the presence of a electron pair in the Nucleophile.

Given the compound expressed in the question the chemical reaction that takes place between the nucleophile and butyl iodide is called Nucleophilic substitution reaction.

Hence we can conclude that the nucleophile that could be used to react with butyl iodide is CH₃CH₂O⁻

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Attached below is the complete question

Answer:

The Chinese created black powder roughly 1000 years ago. It's a 75:15:10 mix of potassium nitrate (saltpeter), charcoal, and sulfur. Black powder is contained in a tube around a fuse in basic firework rockets. When lighted, more sophisticated fireworks shells are fired from a mortar containing black powder, which generates a lift-off response.

Distinct metals are mixed to generate different colors in fireworks. The difference between incandescence and luminescence is that incandescence is light created by heat and luminescence is light produced by other sources. Pure components are required for any type of light since traces of other chemicals will cloud the hue. Copper chloride produces a blue tint, while barium chloride produces a luminous green color.

The standard enthalpy of reaction of the given reaction is -865.71 kJ per mole of N₂H₃CH₃.

The standard molar enthalpy of formation of a compound is defined as the enthalpy of formation of 1.0 mol of the pure compound in its stable state from the pure elements in their stable states at P = 1.0 bar at a constant temperature.

Let's consider the following equation.

4 N₂H₃CH₃(l) + 5 N₂O₄(l) → 12 H₂O(g) + 9 N₂(g) + 4 CO(g)

We can calculate the standard enthalpy of the reaction using the following expression.

ΔH° = Σnp × ΔH°f(p) - Σnr × ΔH°f(r)

where,

ΔH° = 12 mol × ΔH°f(H₂O(g)) + 9 mol × ΔH°f(N₂(g)) + 4 mol × ΔH°f(CO(g)) - 4 mol × ΔH°f(N₂H₃CH₃(l)) - 5 mol × ΔH°f(N₂O₄(l))

ΔH° = 12 mol × (-241.81 kJ/mol) + 9 mol × (0 kJ/mol) + 4 mol × (-110.53 kJ/mol) - 4 mol × (54.20 kJ/mol) - 5 mol × (-19.56 kJ/mol)

ΔH° = -3462.84 kJ

In the balanced equation, there are 4 moles of N₂H₃CH₃. The standard enthalpy of reaction per mole of N₂H₃CH₃ is:

-3462.84 kJ / 4 mol = -865.71 kJ/mol

The standard enthalpy of reaction of the given reaction is -865.71 kJ per mole of N₂H₃CH₃.

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Answer:

Chlorine

Explanation:

It has the greatest mass out of the elements listed

Answer:

Because photosynthesis ceases due to the lack of sunlight.

Explanation:

Plants typically absorb CO2 and release oxygen, but they also “exhale” CO2, particularly at night, when photosynthesis ceases due to the lack of sunlight. Forests also emit more CO2 when they are stressed by increasing temperatures.

Answer:

Instead, pour a small amount into a beaker or clean weigh dish. Once you have added a chemical to a container, label it promptly. When you are finished with the experiment, dispose of the excess chemical as chemical waste. Do not simply pour the excess chemical down the sink.

Answer:

i think the answer is D

Explanation:

Answer:

C: O2

Explanation:

Hope it helps

Peace out

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Answer:

c

Explanation:

Answer:

a fur

Explanation:

I took the test

Hope it helps.

If you have any query, feel free to ask.

Answer:

2.2 moles

Explanation:

right on test

Answer: I would say c

Explanation:

A chemical reaction is said to be at equilibrium when the rate of the forward and backward reactions are equal.

Chemical reaction is the combination of two or more substances called reactants to form products.

A chemical reaction can exist in equilibrium when the rate of the forward and backward reactions are equal.

Forward reactions are reactions in which products are produced from reactants and it goes from left to right in a reversible reaction.

Backward reaction is when reaction goes from products to reactants.

Therefore a reaction is said to be at equilibrium when the rate of formation of products is the same as the rate of formation of reactants in a reversible reaction.

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Answer: They use their feathers

Explanation: They fluff their feathers for warmth I think so at least

Because I'm sure they stay in the forest and don't really hibernate

Answer:

They fluff there feathers for warmth

Explanation:

I did the test and got 100

Answer: creates the pressure to fuse atoms

Answer:

16.7 mL of 6.0 M HCl

Explanation:

Answer:

If you are looking for a temperature then it would be 961.8 degrees Celsius  

Explanation: Hope this helps<3

Answer:

1.1782 moles

Explanation:

Number of moles of C3H8

= mass ÷ molar mass

= 75.6 g x [(3 x 12) + (8 x 1)]

= 75.6 g x 44

= 1.1782 moles

Answer:

not sure what to say to this but the rays of the sun contain solar energy which is then converted into energy to use for electrical power

Answer:

Convection cells

Answer:

sticky notes will open where you left them in the list of notes Tao or double click a notes to open it or from the keyboard press ctrl+n to start a new note to close a note tap or double click the class icon (x)

Answer:

Option 1

Explanation:

Here the formation of water is shown

[tex]\\ \tt\bull\rightarrowtail H_2+O_2\longrightarrow H_2O[/tex]

Hydrogen and oxygen combine together to form water.

Answer: The answer is C.) NH3

Explanation:

Ammonia is a covalent compound because the nitrogen and hydrogen atoms are nonmetals in nature. Ammonia (NH3) is a covalent compound because the nitrogen and hydrogen atoms are nonmetals in nature, they don’t have any tendency of either accepting or donating the electrons but both nitrogen and hydrogen atoms have a tendency to share their valence electron with each other.

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Answer:

34.2

Explanation:

Bc it is the loser one to it

The oxygen in the final equation appears as reactant Upper O subscript 2 (g). Thus, option A is correct.

The chemical equations are the representation of the chemical formula involved in the equation as the reactant and the formed product.

The given chemical equations are:

The final chemical equation formed for the formation of Carbon dioxide is the sum of the two equations.

The final equation is achieved by substituting equation 1 in equation 2.

[tex]\rm C\;(s)\;+\;\frac{1}{2}\;O_2\;(g)\;+\;\dfrac{1}{2}\;O_2\;(g)\;\rightarrow\;CO_2\;(g)\\\\ C\;(s)\;+\;O_2\;(g)\;\rightarrow\;CO_2\;(g)[/tex]

The oxygen in the final equation appears as reactant Upper O subscript 2 (g). Thus, option A is correct.

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Answer:

H:H

Explanation:

The boys can arrive at the conclusion that as temperature increases, a greater mass of copper sulfate is dissolved in water.

An experiment is a scientific investigation that seeks to obtain cause and effect relationships. There must be a dependent and an independent variable in every experiment.

The average of the temperature readings is; 20 + 30 + 40 + 50 + 60 + 70 + 80/7 =  50

They used an interval of 10 degrees for the temperature readings. The boys should have kept the heating time the same. The independent variable in this experiment is the temperature. The boys can arrive at the conclusion that as temperature increases, a greater mass of copper sulfate is dissolved in water.

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a. The range of temperatures that the boys used is 60.

b. The interval used for temperature = 10

c. Boys must have kept the amount of water same.

d. Independent variable is the amount of water.

e. The conclusion that can be made is the mass dissolved increases at higher temperature.

An experiment is a scientific investigation that seeks to obtain cause and effect relationships. There must be a dependent and an independent variable in every experiment.

An independent variable is the variable you manipulate or vary in an experimental study to explore its effects. It’s called “independent” because it’s not influenced by any other variables in the study.

A dependent variable is the variable that changes as a result of the independent variable manipulation. It’s the outcome you’re interested in measuring, and it “depends” on your independent variable.

Given,

a. Initial temperature = 20°C

Final temperature = 80 °C

Range = final temperature - initial temperature

= 80 - 20

= 60

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The change in enthalpy for the reaction of carbon dioxide is -393.5 kJ/mol. Thus, option A is correct.

The change in enthalpy of the reaction is given by the energy of the product and the energy of reactant difference.

The chemical equation for the reaction is:

[tex]\rm C \;(s)\;+\;2\;O_2\;(g)\;\to\;CO_2\;(g)[/tex]

The standard enthalpy change for carbon dioxide is -393.5 kJ/mol

The standard enthalpy change for oxygen is 0 kJ/mol

The change in enthalpy of reaction is given as:

[tex]\rm \Delta \textit H=CO_2-2\;\times\;O_2\\\Delta \textit H=-393.5\;kJ/mol-2\;\times\;0\;kJ/mol\\\Delta \textit H=-393.5\;kJ/mol[/tex]

The change in enthalpy for the reaction of carbon dioxide is -393.5 kJ/mol. Thus, option A is correct.

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Answer:

-393.5 kJ

Explanation:

edg 22, goodluck!

the molar mass of Zn is 65

2.the molar mass of Ag is 108