Which describes the molecule shown below?
H
HC-H
H
Η Η
H-C-C-C-C-H
IL
Η Η Η Η
A. Unsaturated alyane
B. Unsaturated alkene
ОС
C. Saturated alkene
D. Saturated alkane

Answer:

1) 90.0 mL

2) 11.25 M

3) 0.477 M

4) 144 mL

Explanation:

The main formula that will be used for all these calculations is:

                                                     C₁V₁ = C₂V₂

C stands for concentration and V stands for volume and the subscripts 1 and 2 indicate an initial concentration or volume and a final concentration or volume.

For each problem, it's best to start by figuring out what you have and what you need to find. Figure out if you're looking for an initial value or a final value.

1) We need to find the initial volume. So, take what values you have and plug them in and then solve for whatever variable:

5.00 M · V₁ = 500.0mL · 0.900 M                        - divide by 5.00

C₁ = 90.0 mL

2) This time we're finding the initial concentration:

20.0mL · C₁ = 150.0mL · 1.50 M                          - divide by 20.0mL

C₂ = 11.25 M

3) Now we're finding the final concentration:

12.00mL · 3.50 M = 88.0mL · C₂                         - divide by 88.0mL

C₂ = 0.477 M

4) Finally, we're looking for the final volume:

9.0mL · 8.0 M = 0.50 M · V₂                                - divide by 0.50 M

V₂ = 144mL

The functional groups which are found in the molecules are responsible for their chemical reactions. Here the first organic compound is an acid, second one is an ether, third one is an alkyl halide and the fourth is an primary amine.

The functional groups in the field of organic chemistry can be defined as the substituent atoms or groups of atoms which are attached to the specific molecules. They have distinct features and properties and they are independent of the molecules they are attached to.

The compound with the functional group R-COOH is acid, R-O-R¹ is ether, R-X and R-NH₂ is a primary amine.

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Answer:

7. Option 2. Atom 1 and Atom 4

8. The same number of valence electron

Explanation:

7. Determination of which symbol represent an isotope.

Isotopes are atoms having the same atomic number but different mass number due to the difference in the neutron number.

From the question given above, the following were obtained:

Z => atomic number

A => mass number

Atom >>> Isotope >>>>> Z >>>> A

1 >>>>>>> ¹⁷₇E >>>>>>>> 7 >>>> 17

2 >>>>>>> ¹⁷₈E >>>>>>> 8 >>>> 17

3 >>>>>>> ¹⁸₆E >>>>>>> 6 >>>> 18

4 >>>>>>> ¹⁸₇E >>>>>>> 7 >>>> 18

From the table above, only atom 1 and 4 has the same atomic number. Hence, atom 1 and atom 4 are isotopes.

8. To know the correct answer to the question, we shall write the electronic configuration of magnesium and calcium. This can be obtained as follow:

Mg (12) => 1s² 2s²2p⁶ 3s²

Valence electron => 2

Ca (20) => 1s² 2s²2p⁶ 3s²3p⁶ 4s²

Valence electron => 2

We can see that magnesium and calcium both have the same valence electron. Hence, they will have similar chemical properties.

Answer:

Ocean acidification

Explanation:

Ocean acidification is the progressive decrease in the pH of the oceans on Earth as the increasing amount of carbon dioxide CO₂ in the atmosphere which is due mainly to fossil fuel combustion, is dissolved into the oceans

Carbonic acid is formed when carbon dioxide, CO₂, in the atmosphere is dissolved in the ocean water to form carbonic acid as follows;

CO₂ + H₂O → H₂CO₃

H⁺(aq) ⇄ HCO₃⁻ (aq)

According to L e C h a t e l i e r ' s an increase in the amount of carbon dioxide in the atmosphere will result in more CO₂ dissolving into the oceans and forming more carbonic acid, HCO₃⁻ (aq), thereby increasing the acidity of the oceans which is equivalent to a reduction in the pH of the ocean waters.

Answer:

4 moles of HCl will be required to produce 2 moles of H2.

Explanation:

A balanced chemical equation gives the stoichiometric ration of moles of reactants required to produce a certain number of moles of products. The ratio of moles of reactants to moles of products is known as the mole ratio and is constant for a given chemical reaction.

In the given balanced equation of reaction shown below:

Zn + 2HCl → ZnCl2 + H2

The mole ratio of HCl and H2 is 2:1. This means that in this reaction between Zinc metal and hydrochoric acid to produc zinc chloride and hydrogen gas, every two moles of hydrochloric acid used in the reaction will result in the production of one mole of hydrogen gas.

Therefore for two moles of H2 to be obtained from the reaction, twice the number of moles of HCl is required.

Moles of HCl required = 2 × 2 moles = 4 moles of HCl.

Answer:

Fossil fuels..........

Answer:

True

Explanation:

Competition is the act of competing with one another for a particular resource. An example is two animals quarrelling over a food or two people quarreling over who lost their money. Competing is a type of rivalry in which two people compete for one resource. The answer for this question is True.

The answer is TRUE. Competition is rivalry between individuals for a particular resource

Competition amongst individuals?

Competition can be described as an interaction between two individuals in which they both fight for the available resources in the environment.

For example, when there is limited source of food and water in an environment, the individuals or organisms present will struggle to take the available food in order to survive while those individuals that were unable to get this resource might end up dead as the available food is limited.

This also occurs in plants and they also compete for sunlight, food, water.

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Answer:

3Sn(s04)2

Explanation:bc it cant be anything else

2Fe(No2)3

Explanation:

by multiplying 2×3 we get 6

then 2×6 so we get 12 atoms of o

Answer:

88g of Sr(NO3)2 are present

Explanation:

To solve this question we must, as first, find the moles of oxygen. Based on the chemical formula of strontium nitrate, there are 6 atoms of oxygen per mole of strontium nitrate. Thus, we can find the moles of strontium nitrate and its mass as follows:

Moles Oxygen:

40g * (1mol / 16g) = 2.5 moles Oxygen

Moles Strontium nitrate:

2.5 moles Oxygen * (1mol Sr(NO3)2 / 6mol O) = 0.4167 moles Sr(NO3)2

Mass (Molar mass Sr(NO3)2: 211.63g/mol)

0.4167 moles Sr(NO3)2 * (211.63g / mol) =

Answer:

In a molecular formula, it states the total number of atoms of each element in a molecule.

Explanation:

Answer:

19ml

Explanation:

trust me

Answer:

C. volume

Explanation:

Answer:

Explanation:

We know that

pH +pOH = 14

Given pH = 8.30

⇒ p0H = 14-8.30 = 5.70

Since, we know that

[tex]10^{-pH} = [H^{+}][/tex]

Answer: Electricity

Answer:

J.J Thomas in 1897

Answer:

79.89%

Explanation:

Copper has a molar mass of 63.55

Oxygen has a molar mass of 16.00

If you add these you get 79.55

To get the mass percent of copper divide copper by the whole. 63.55/79.55*100= 79.89%

Answer:

adding an acidic solution

Explanation:

Strong acids dissociate completely in water and the H⁺ ions react with the OH⁻ ions to make H₂O. If we add an acid to our solution of Ca(OH)₂, the acid protons would react with some of the OH⁻ ions and drive the equilibrium to the right. More of the solid Ca(OH)₂ should dissolve.

Answer:

It would take 13 minutes.

Explanation:

The temperature decreases at a linear rate, meaning that we can describe the process by using the following formula:

Where T₂ is the final temperature, T₀ is the initial temperature; and t is the elapsed time in minutes.

We input the data given by the problem:

And solve for t:

Answer:

The Sun

Explanation:

Solar power is energy from the sun that is converted into thermal or electrical energy.

Answer:

The sun

Explanation:

The sun is the main source of solar energy.

Answer:

B.) Lobbying for policy changes

The Alliance to Save Energy seeks to increase energy efficiency through lobbying for policy changes and the correct option is option B.

The Alliance to Save Energy (ASE) is a nonprofit organization formed by industrial, technological, environmental and consumer leaders. It promotes energy efficiency across the world through research, education and advocacy.

Their mission is to improve energy productivity by:

Therefore, The Alliance to Save Energy seeks to increase energy efficiency through lobbying for policy changes and the correct option is option B.

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Answer:

its B

Explanation:

I took the test and its that passage way thing. (tell me if this works for you! it will but just wanna make sure!)

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

we have

[tex]n = \frac{1.88 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 31.229235...[/tex]

We have the final answer as

Hope this helps you

Answer:

b

Explanation:

i took the quiz

Answer:

B: reflecting

Explanation:

Sound waves can bounce off smooth

Answer:

126 g of H₂O

Explanation:

Firstly, we complete the equation:

2H₂  +  O₂  →  2H₂O

If we have 7 moles of hydrogen, we assume, the oxygen is in excess.

Ratio is 2:2.

2 moles of hydrogen can produce 2 moles of water

Then, 7 moles of H₂ must produce 7 moles of water.

We convert moles to mass → 7 mol . 18 g/mol = 126 g

Answer:

D. The energy level of the electron.

Explanation:

There are four quantum numbers which are used to describe the movement and paths or positon of each electron within an atom. Quantum numbers can be used to determine the electronic configuration of atoms and the most likely location of the atom's electrons. Quantum numbers are also used in determining other characteristics of atoms, such as ionization energy and the atomic radius.

The four quantum numbers are namely, principal, azimuthal, magnetic and spin quantum numbers.

Principal quantum numbers are denoted by the symbol ‘n’. They describe the principal electron shell or energy level the atom.The value of the principal quantum number are positive integer values that is equal to or greater than one. The value n = 1 represents the innermost electron shell of an atom, which corresponds to the lowest energy state of an electron. The larger the values of 'n' the greater the energy level and the farther the electron is from the nucleus.

Answer:

the answer is b edg 2021

Explanation:

it just is