water

air

multiple cells

a place to live

Answer:

It is option #1.

Explanation:

Biotechnology is defined as, "The exploitation of biological processes for industrial and other purposes, especially the genetic manipulation of microorganisms for the production of antibiotics, hormones, etc."

Therefore, option #1 is your answer!

Astatine : Halogen

Nitrogen : Nonmetal

Krypton : Noble gas

Chlorine : Halogen

Sulfur : Nonmetal

i just needed the points sorryyy

Answer:

see calculations in explanation

Explanation:

percent = part/total x 100%

part = ∑ atomic mass of element

total = ∑ molecular mass of compound

       = H amu  +  C amu +  Namu

       = 1.008 amu + 12.011 amu + 14.007 amu

       = 27.026 amu

%H = (1.008amu/27.026amu)100% = 3.730%

%C = (12.011amu/27.026amu)100% = 44.442%

%N = (14.007amu/27.026amu)100% = 51.827%

Check results ∑%values = 100%

3.730% + 44.442% + 51.827% = 99.999% ≅ 100%

Answer:

Answer: Burning changes the chemical make up of an object.

Explanation:

A chemical change can be defined as a change in the substance when it combines with other kind of substance to form a new substance. A chemical change can also occur when a substance is broken down into two or more products. These changes cannot be reversed. These changes affect the physical make up of an object. For example, burning as when an object is burned it cannot be transformed into its original form. A wood if burned can be converted into ash, water and carbon dioxide cannot regain its original form after burning so burning brings about chemical change in an object.

Answer:

definition 1. goes with B. meteoroid

definition 2. goes with C. meteor

definition 3. goes with A. meteorite

Answer: meteoroid - a small piece of rock in space, meteor - a rock that burns up in Earths atmosphere, meteorite - The remains of a rock from space that strike Earth's surface.

Explanation:

Answer:

acceleration

mhmm..whichuksnackru?..fishnchiips OUHHHOOUUHHYESS SandyROASTthatsevenbaetterthanfishnchips

Answer: 0.133 mol/l

Explanation: molality = concentration = 0.400 mol/3.0 l

Water can dissolve oxygen gas. The oxygen that is dissolved in water is used for respiration by plants and animals that dwell in water. Therefore, oxygen gas that has been dissolved in water is crucial for the survival of aquatic creatures and plants.

During respiration, carbon dioxide is expelled in the opposite direction, back into the environment, while oxygen is moved from the outside environment to the cells within tissues.

The oxygen molecules become trapped between the open spaces between the water molecules as a result of the creation of hydrogen bonds. Water is a polar solvent, as is well known.

Additionally, the oxygen molecules have pi-electrons, which give them a certain amount of polarity because they are sensitive to polar environments.

The majority of aquatic creatures need oxygen for respiration, and our aquatic ecosystems are at risk if there is an oxygen shortage in the water.

Thus, The oxygen that is dissolved in water is used for respiration by plants and animals that dwell in water.

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Answer:

Standard reduction potential is an intensive property---- True

Reduction takes place at the anode ----- False

The half reaction with the lower standard reduction potential will be at the cathode in a galvanic cell ------false

The half reaction with the higher standard reduction potential will be at the cathode in a galvanic cell  ------  True

Explanation:

An intensive property is a property of a substance which is inherent in it and part of its nature. It does not depend on the amount of substance present in the substance. Standard reduction potential is an intensive property.

In a galvanic cell, oxidation takes place at the anode and reduction takes place at the cathode. At the anode, the electrode potential is more negative (an oxidation) while at the cathode the reduction potential is less negative (a reduction).

Reduction potential is an intensive property of cell, reduction takes place at cathode of galvanic cell, the half reaction with the lower standard reduction potential will be at the anode in a galvanic cell and half reaction with the higher standard reduction potential will be at the cathode in a galvanic cell.

Galvanic cell is also known as voltaic cell, and in this cell electric current is originated from spontaneous redox reaction.

In the galvanic cell, anode is a negatively charged electrode in which oxidation process takes place and value of electrode potential is more negative. Cathode is a positively charged electrode in which reduction process takes place and electrode potential is less negative. And intensive property is not depends on the amount of substance.

Hence, correct statements are true, false, false and true.

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In physical and chemical changes, the number of atoms and weight of the object always stays the same.

In a chemical change, the substance changes into a different substance.

I'm pretty sure this next one is can or can not be seperated, depending on what has been mixed. Not positive tho.

Answer:

C

Explanation:

Answer:

A hypertonic solution has increased solute, and a net movement of water outside causing the cell to shrink. A hypotonic solution has decreased solute concentration, and a net movement of water inside the cell, causing swelling or breakage.

Explanation: hope this helps :) sorry if it's wrong :(

Answer: It's D

Explanation:

Answer:

the answers d if you give brainliest give it to the other person im not worthy of it

Explanation:

Answer:

Aluminum

Explanation:

Answer:

3.5

Explanation:

500*0.175= 8.75 *40/1000=3500/1000=3.5

Answer:

3.50 grams

Explanation:

Mastering chem

Answer: I think the answer is C)

Explanation:

density of ethanol is 0,79 kg/dm^3 so mass of one dm^3

Is 790 g

Answer:

none of the above

Explanation:

This is true. that's why we use it for snow

Answer:

false

Explanation:

ya thats why we use it for boiling water

Answer:6.7892 meters

Explanation:

Answer:

260 kPa

Explanation:

To answer this problem we can use Gay-Lussac's law, which states that at a constant volume (such as is the case with a rigid container):

Where in this case:

We input the data:

And solve for P₂:

Answer:

interstitial is correct my child

Explanation:

Answer:

I'm going to go with conduction

Explanation:

At first I thought it was combustion but I read the problem incorrectly. It seems like the liquid boils after you put them on the hot plate.

It's most likely conduction because heat and energy is being transferred into the liquid from the hot plate

Answer: trigonal bipyramidal

Explanation:

Number of electron pairs = [tex]\frac{1}{2}[V+N-C+A][/tex]

V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

[tex]SbCl_5[/tex] :

In the given molecule, antimony is the central atom and there are five chlorine as monovalent atoms.

The number of electron pairs are 5 that means the hybridization will be [tex]sp^3d[/tex] and geometry of the molecule will be trigonal bipyramidal.

Answer:c

Explanation:

On a very hot day, No, the refrigerator would exhaust the same amount of heat into the room as it takes out of the room.

Eliminating heat from a body but also bringing it down to the lowest temperature actually is the technique of refrigeration. The refrigeration process is carried out in refrigerators.

Therefore, keeping the doorway of an electrical refrigerator open won't help cool the room. In actuality, the refrigerator raises the temperature of the room by removing heat from the freezing compartments as well as rejecting it to the air in the room.

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hmm...for your answer I think it would be D

Answer:

primary consumer

Explanation:

Lemmings are primary consumers.