Please helpI need help please show work!!

Answer:

[tex]2.55 \times {10}^{24} [/tex]

atoms

The exploration of the mid-cayman rise is intended to discover that what life may have been like before the evolution of photosynthesis.

Mid - cayman rise is an area or era where only some amount of light is coming but still existence of life is present there.

As we know that plants make their own food by the process called photosynthesis in the presence of light, but this is not the scenario for all the time. Before the discovery of photosynthesis plants also prepared their own food.

Hence, option (a) is correct.

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Answer:

A

Explanation:

Answer:

The amount of substance needed to saturate water increases as the temperature increases.

Explanation:

Answer:

True

Explanation:

Differences in water density affect vertical ocean currents (movement of surface ocean water to the bottom of the ocean and movement of deep ocean water to the surface). … Denser water tends to sink, while less dense water tends to rise.

Differences in the density of seawater cause it to move. Therefore, the given statement is true.

The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass). Although the Roman letter D may also be used, the sign most frequently used for density is (the lower case Greek letter rho). Density is calculated mathematically by dividing mass by volume.

Where m represents the mass, V is the volume, and is the density. Density is sometimes roughly characterized as weight every unit volume, while this is incorrect technically; this quantity is much more precisely known as specific weight. One example of this is in the US oil and gas business. Differences in the density of seawater cause it to move.

Therefore, the given statement is true.

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Answer:

600

Explanation:

because if there's 6 molecules in each then 6×100 is 600

P₁V₁=P₂V₂

760.5=P₂.3

P₂=1266.6 torr

Answer:

D

Explanation:

An ionic solid is a crystalline solid held together by charge attractions or an ionic bond.

Ionic bond or electrovalent bond is a type of bond which is formed between two elements when there is an exchange of electrons which takes place between  the atoms resulting in the formation of ions.

When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge  and forms an ion called the anion.

As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.They are good conductors of heat and electricity. They have high melting points. These compounds are brittle.

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Answer:

have controlled population!

Explanation:

Answer:

B

Explanation:

it's has more water and will go active way faster

Answer:

Beaker b

Explanation:

This is because the temperature in beaker b is higher. Hot water has more kinetic energy. Therefore, it's particles move faster and collide more frequently with the particles of antacid tablet. So, the reaction occurs faster.

Hope this helps =)

Answer: I think it's ok, but I have a neutral stance on it.

Explanation: Foods are genetically modified to preserve them and I've had my fair share of wasted money and bad expired food, so I'm a-ok on GM food.

Answer:

Well I think that we should use more for tride or give to our allies

Explanation:

Answer:

A. 38.4 [gr].

Explanation:

all the details are provided in the attachment, the answer is marked with orange colour.

Answer 2. Accept with minor revisions: Also known as conditional acceptance, this decision means that the paper requires minor changes for it to be ...

wer:

Explanation:

Answer:

three to four days

Explanation:

Leftover steak is safe to eat after three to four days in the refrigerator—any longer and you could catch a foodborne illness from bacteria growth. Bacteria can also grow on perishable food that has been left out at room temperature for over two hours or kept at a temperature lower than 40°F.

In the given decomposition reaction of MgCl₂, the oxidized species is magnesium.

Those species which goes through the oxidation process by the addition of oxygen or by the removal of hydrogen and electrons are known as oxidized species.

Given chemical reaction is:

MgCl₂ → Mg²⁺ + 2Cl⁻

In the above reaction oxidation of magnesium takes place as they losses electrons and reduction of chlorine takes place as they gain electrons.

Hence magnesium is the oxidized specie.

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Answer: B. Mg

Explanation:

E D G E

Answer:

+4

Explanation:

In PbO2, oxygen exhibits an oxidation number of -2 (since it's not a peroxide or superoxide):

Let the oxidation number of Pb be x. Then, for the compound to be neutral, the oxidation numbers of all atoms should add up to zero.

⇒ x + (−2) + (−2) = 0

x = +4

So the oxidation no. of Pb is +4.

I hope this helps.

The experiment referenced here involves the use of Y32P-ATP. The atom involved in the site of the covalent attachment is the N atom in Aminomethylcyclohexane (AMC).

Given that Aminomethylcyclohexane  (AMC) had been linked around the carboxyl side, it, therefore, means that that type of linkage called the Amide-Linkage (That is N-acylation)  can be utilized in the covalent bonding of the fluorophore into the peptide

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Answer:

Explanation:

Copepods. The single eye gave them the nickname of "cyclops"

Answer:

three _ _E _ _ _

Explanation:

Answer:

Step 1: Connect the light microscope to a power source. If your microscope uses a mirror instead of an illuminator, you can skip this step. Instead, find a place where natural light is easily accessible

Step 2: Turn the revolving nosepiece so the lowest objective lens is in position.

Step 3: Mount your specimen onto the stage. But before doing so, see to it that your specimen is adequately protected by placing a coverslip on top of it.

Step 4: Use the metal clips to keep your slide in place. Make sure the specimen is positioned in the center, right under the lowest objective lens.

Step 5: Look into the eyepiece and slowly rotate the coarse adjustment knob to bring your specimen to focus. See to it that the slide does not touch the lens.

Step 6: Adjust the condenser for the maximum amount of light. Since you're on the low power objective, you may have to decrease the illumination. Use the diaphragm under the stage to adjust.

Step 7: Now slowly rotate the fine adjustment knob until you obtain a clearer image of your specimen.

Step 8: Examine your specimen.

Step 9: After you're done viewing with the lowest power objective, switch to the medium power objective and re-adjust the focus with the fine adjustment knob.

Step 10: Proceed to the high power objective once you have it focused.

Answer

The structural formula are similar to molecular formulas but show how atoms are bonded together.

Explanation:

The structural formula for a compound gives the same information as its molecular formula (the types and numbers of atoms in the molecule) but also shows how the atoms are connected in the molecule.

Answer:

Answers Anonymous answered Sulfur has 6 valence electrons so it needs 2 more for an octet and it will then have a charge of negative 2

Explanation:

Answer:

In my sense your answer must be Pelvic cavity.

The volume occupied by 10 moles of hydrogen gas at 145K and 705 Torr is 128.01L.

The volume of a gas can be calculated using ideal gas law equation as follows:

PV = nRT

Where;

0.93 × V = 10 × 0.0821 × 145

0.93V = 119.05

V = 128.01L

Therefore, the volume occupied by 10 moles of hydrogen gas at 145K and 705 Torr is 128.01L.

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The monomer from which the very common commercial polymer poly vinyl chloride is vinyl chloride with the formula, CH₂Cl = CH₂Cl. The PVC is formed by addition polymerization.

Polymerization is the process of combination of smaller molecules or compounds in large number to form macromolecules or polymers. There are a lot of polymers that we are using daily in the form of bags, plastics, bottles etc.

Among the common polymers we use PVC or poly vinyl chloride is very essential commercial polymer. The monomer of PVC is vinyl chlorides.

The polymerization of n vinyl chloride to form polyvinyl chloride is given below.

[tex]\rm n CH_{2}Cl = CH_{2}Cl \rightarrow (-CH_{2}Cl - CH_{2}Cl -)__{n}[/tex]

The polymerization of vinyl chloride is taking place through addition mechanism. The vinyl chloride monomer repeatedly add one by one to form the polymer.

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Answer:

Sodium+ Sulphuric Acid--> Sodium Sulphate+ Water

Answer:

Chemical Energy

Explanation:

Energy, Molecules and Chemical Reactions. Energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy.