Need help with these.

Answer:

By the wavelength of the light transmitted by it.

Explanation:

The color of a transparent object is determined by the wavelength of the light transmitted by it. An opaque object that reflects all wavelengths appears white; one that absorbs all wavelengths appears black.

Answer: a) 35 , b) 45 , c) 35 , d) 35 , e) 80

Explanation:

a) - protons equal to atomic number of element , b) - subtract atomic number by number of protons to get neutrons (80 - 35 = 45) , c) - protons same as electrons unless its an ion , d) - atomic number is equal to protons , e) - protons plus neutrons equal mass number (35 + 45 = 80). :)

Answer:

Earth

Explanation:

The condensation reaction between two molecules of glucose would result in the formation of maltose (C12H22O11) and the release of water.

Carbohydrates are organic compounds that are used to store energy. An example of a carbohydrate is glucose, which is a single sugar or a monosaccharide. The process of forming larger molecules from the combination of simple sugars is called the condensation process. A water molecule is released in the process of combining the molecules together through a glycosidic bond.

The condensation reaction for two molecules of glucose (C6H12O6) results in the formation of maltose, a disaccharide, and the release of water. The molecular formula of maltose is C12H22O11. It can be observed that the condensation reaction shown below is balanced.

Glucose (C6H12O6) + Glucose (C6H12O6)  → Maltose (C12H22O11) +H2O

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Answer:

Ring is made up off copper.

Explanation:

Given data:

Mass of ring = 89.2 g

Volume of water = 10 mL

Volume of water + ring = 20 mL

Ring is made up of = ?

Solution:

Volume of ring = (Volume of water + ring) - Volume of water

Volume of ring = 20 mL - 10 mL

Volume of ring = 10 mL

Density:

Density = mass/volume     ( 1 mL = 1 cm³)

d = 89.2 g/  10cm³

d = 8.92 g/cm³

Thus, ring is made up off copper.

Answer:

A option

Explanation:

water gets split in photosynthesis

Answer:

C option

Explanation:

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Answer:

[Ar]4s23d3

Explanation:

Answer:

Its answer choice C

1. Sara wants to see if a new brand of hair dye lasts longer than the brand she

currently uses. She puts the new hair dye on the left side of her head and the old

brand on her right side. After 2 weeks she observes which side of her head has

more gray hair showing through.

Answer:

True

Explanation:

Answer:

The third option should be right

Answer:

C.

Explanation:

edg. 2020 just took the test

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question we have

[tex]denstity = \frac{100}{10} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

thanks

Explanation:

Answer:

short answers:

A learned behavior is a behavior that develops during an animal’s lifetime.

Examples of learned behaviors include tying one’s shoes or solving a math problem.

An inherited behavior is a behavior that an animal is born with.

An example of an inherited behavior is a bird building a nest.

Explanation:

Learned behaviors are those which are gradually developing in us through learning at different ages and it takes time. Inherited behaviour is innate to us which are incorporated with us by birth.

An organism develops a learned behavior as a result of experience. In contrast to learned actions, inherent behaviors are genetically preprogrammed and can be carried out without any prior knowledge or instruction.  

Certain behaviors have features that are both acquired and innate. Zebra finches, for instance, have a genetic predisposition to learn a song, but the song they sing is influenced by what they hear from their dads.

Inherited behaviors are inherited from parents to their offsprings. Such as  similar nature in sound, angriness, some diseases etc. They are not gathered from any experience and are accompanied by birth.

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Answer:

m-CPBA followed by base catalysed hydrolysis

Explanation:

The scheme of this reaction is shown in the image attached.

We can see here that the acetophenone reacts with metachloroperoxybenzoic acid (m-CPBA) as shown in the image to yield phenyl acetate.

Phenyl acetate is now hydrolysed by a base as shown to yield the acetate ion and phenol.

Answer:

Thank you! Thank you! Thank youuuuuu

Explanation:

You saved my buttt!?!???!?!?!!?

Answer:

The elements in the alkaline earth metals group; beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra), have two electrons in their outer electronic shell.

Explanation:

The alkaline earth metals consisted of 5 shells have been beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

The alkali earth metal has been the element of group 2. The elements have consisted of the 2 valence electrons.

The electrons in the elements have been assigned the electron address based on the capacity of the shells to occupy electrons.

The electrons have been filled based on the energy level of the shells.

The order of the increasing energy level has been:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s.

The elements with the occupied 4p shells will have the 5 shells.

The elements in group 2 consisted of 5 shells have been beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).

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Answer:

22.715 moles of oxygen are used

Explanation:

Given data:

Number of moles of ethane = 6.49 mol

Number of moles of O₂ required = ?

Solution:

Chemical equation:

2C₂H₆ + 7O₂       →     4CO₂ + 6H₂O

Now we will compare the moles of oxygen with ethane.

                    C₂H₆           :           O₂  

                       2              :             7

                     6.49           :           7/2×6.49 = 22.715 mol

Thus, 22.715 moles of oxygen are used.

Answer:

A ithink

Explanation:

The chemical changes require the breaking and forming of chemical bonds during a chemical reaction. The correct option is C.

Chemical Bonding refers to the formation of a chemical bond between two or more atoms, molecules, or ions to give rise to a chemical compound.

These chemical bonds are what hold the atoms in the resulting compound together.

A chemical bond is a bond formed when the atoms in a compound's molecule combine and are held together by a strong combining force.

Chemical bonds are classified into two types namely ionic bonds and covalent bonds.

Chemical bonding enables scientists to combine the elements of the periodic table in a variety of ways to create chemical compounds and materials.

Thus, the correct option is C.

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Answer:

A.

Explanation:

I'm pretty sure that its right because I know bases aren't soluble and I've never heard anything about all of them being neutralizing to acids.

Hope this helps!

Answer:

You have 3 moles, so there are 18481.518 oxygen molecules

Explanation:

There are  18.066×10²³ molecules of oxygen present  in 3 moles of oxygen.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons.

Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

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Answer:

The movement of tectonic plates is caused by convection currents in the molten rock in Earth's mantle below the crust layer. Earthquakes and volcanoes are great examples of the tectonic movement's results.

Explanation:

Answer:

B-After the 3s sublevel is filled with two electrons, each additional electron goes into the 3p sublevel.

Explanation:

Edmentum

Answer:

its d

hope it helpss :)))

Answer: D

Explanation:

Answer:

4Fe + 3O₂ → 2Fe₂O₃

General Formulas and Concepts:

Chemistry - Reactions

Explanation:

Step 1: Define

RxN:   Fe + O₂ → Fe₂O₃

Step 2: Balance

We need to balance both Fe and O.

LCM of 2 and 3 is 6:

Fe + 3O₂ → 2Fe₂O₃

We now need the same amount of Fe on both sides:

4Fe + 3O₂ → 2Fe₂O₃

Answer:

D. Radiation

Explanation:

The Sun always transfers its energy to any planet (Including Earth) through solar radiation, infrared, and UV rays. These are all examples of radiation.

I hope this helps you! Good luck with your test/assignment! :D

Answer:

Electrical energy to mechanical energy

Explanation:

In an electric motor, the energy transformation that is involve is a move from from electrical energy to mechanical energy.

For every system, according to the law of conservation of energy "energy is neither created nor destroyed but transformed from one form to another".