Please help. It's for chemistry

AI a =m not suresedfdssssssssssss

Answer:

the level below which the ground is saturated with water.

Explanation:

Answer: c)winter

HAVE A BLESSED DAY!!!!!

Answer:

A cell cycle is a series of events that takes place in a cell as it grows and divides. ... The cell then leaves interphase, undergoes mitosis, and completes its division. The resulting cells, known as daughter cells, each enter their own interphase and begin a new round of the cell cycle.

Explanation:

Answer:

D) NaNO3 at 10 °C

Explanation:

In this case, to know this, we need to watch the solubility curve of each compound to know which one is saturated or unsaturated in this case.

As you can see in the curve attached, let's analyze first what is an unsaturated solution.

An unsaturated solution is a solution where the quantity of solvent is in excess and the solute is completely dissolved in solution leaving no remains. This depends on the temperature of course. The solubility of one compound vary with the increase or decrease of temperature.

As you can see in the graph attached, what happens to the KCl? we can see that a 40 °C, you just need around g of solute to be dissolved, and be saturated so, this is not the correct choice.

If you watch NaCl, has similar behavior. You just need about 35 g of solute to be saturated.

Finally, the KNO₃ just need 60 g of solute to be dissolved in the solution, completely.

In the case of NaNO 10°C, we can see that at 40 °C it's not touching the curve, so we can assume that this is an unsaturated solution and it would be the correct choice.

Explanation:

its D

random characters AAAJIJRIAJKLGIJHEOGEINDKIKAN

Answer:

Unlike lactic acid fermentation where-in the end product is lactic acid, the 'waste' material in an alcohol respiration is ethanol (an alcohol) and CO2 (carbon dioxide). Human beings have already perfected the use of this process for commercial purposes like in the production of beer, wine and bread

Explanation:

In alcoholic fermentation, pyruvate changes to alcohol and carbon dioxide. This type of fermentation is carried out by yeasts and some bacteria.

Hey there!

Molar mass SO₂ = 64.066 g/mol

Therefore:

1 mole SO₂ -------------------- 64.066 g

(moles SO₂ ) ??---------------- 5.0 g

( moles SO₂) = 5.0 * 1 / 64.066

(moles SO₂) = 5.0 / 64.066

moles = 0.0780 moles of SO₂

Hope this helps!

Answer:

DICLORURO DE ZINC

Explanation:

La ecuación es:

Zn (s) + 2HCl (aq)  →  ZnCl₂ (aq) +H₂ (g)

El zinc reacciona en una reacción redox con el acido clorhídrico para formar una sal y liberar el hidrogeno gaseoso.

Se trata de una reacción redox porque el hidrógeno se reduce (disminuye el numero de oxidación, de -1 a 0, en su estado fundamental), mientras que el Zn se oxida (el numero de oxidación aumenta de 0 a +2).

Como la sal se forma con dos atomos de cloro, se denomina dicloruro por lo que el nombre correcto de la sal en nomenclatura sistemática es:

- DICLORURO DE ZINC

Answer:

Ajay should pass electric current through the water and connect a bulb to the circuit. If the bulb glows, it means that the water is tap water or else, it is distilled water.

Explanation:

This is because tap water contains little impurities like ions of some salts etc., which help in the conduction of electricity. But, distilled water is pure water and doesn't have any ions present in it. So, it doesn't conduct electricity.

Hope this helped

Ajay can test the distilled water by performing the electricity conduction test.

Distilled water has been the water that has an absence of ions and electrolytes. It has been a poor conductor of electricity.

The tap water has been constituted with minerals, electrolytes, and impurities, which results in the addition of conductivity to the water.

To test whether the water has been distilled or not, the circuit test can be performed The water has dipped wires connected with a battery and a bulb. the distilled water is a poor conductor did not allow the bulb to glow. However, with tap water bulb glow.

Thus, to test the water to be distilled or tap, the electricity conduction test has been performed.

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Answer: 3.13%

Explanation:

Answer:

3.13

Explanation:

:)

Explanation:

Distance is the total length of path one travels.

Displacement is the distance between the initial and final position.

 For example, if your classroom is located 200m from your dormitory, you walk to class and back to your dormitory, your distance is 200m + 200m  = 400m;

  Your displacement is 0m. Your initial and final position is the same so no displacement.

Answer:

It is the temperature at which a substance changes from a liquid to a solid.

Have a good day!

The temperature at which a substance  changes from a liquid to a solid is called  its freezing point. Hence, option d is the correct definition of freezing point.

Freezing point is a physical property of a substance which measures the temperature at which its liquid state converts to solid state where, the two phases are in equilibrium.

For example, water freezes at 0 degree Celsius to form ice. Hence, 0°C is the freezing point of water. The freezing point of substance is affected by the bond type, molecular weight, temperature and pressure as well the impurities if any.

The more the intermolecular forces between the molecules, more easy to convert it into solid. Hence, the freezing point will be lower. If there is any impurities present, the freezing point depression will occurs.

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Answer:

The versions of an element with different neutrons have different masses and are called isotopes. The average atomic mass for an element is calculated by summing the masses of the element's isotopes, each multiplied by its natural abundance on Earth.

Explanation:

Answer:

His experiment has very low precision

Explanation:

Precision is how close the answers are together. The answers are increasing in time. So, this makes sence. None of the answers are similar to one another.

Answer:

hmm

Explanation:

let me think

Answer:

speed of sound, frequency and wavelength

Answer:

It would have 74 valence electrons

Answer:

B.) kinetic energy from wind turns blades on wind turbine → wind turbine blades turn generator → generator changes kinetic energy to electricity

Explanation:

correct on edge

just took the quiz

The correct order of steps when using wind to generate electricity is kinetic energy from wind turns blades on wind turbine → wind turbine blades turn generator → generator changes kinetic energy to electricity. Therefore, option B is correct.

The energy an item has as a result of motion is known as kinetic energy. A force must be applied to an item in order to accelerate it. We must put forth effort in order to apply a force.

Kinetic energy has the following formula: K.E. = 1/2 mv², where m is the object's mass and v is its square velocity.

The kinetic energy is measured in kilograms-meters squared per second squared if the mass is measured in kilogrammes and the velocity is measured in metres per second.

The steps when using wind to generate electricity is kinetic energy from wind turns blades on wind turbine → wind turbine blades turn generator → generator changes kinetic energy to electricity.

Thus, option B is correct.

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Answer:

Explanation:

Any substance that contains only one kind of an atom is known as an element. Because atoms cannot be created or destroyed in a chemical reaction, elements such as phosphorus (P4) or sulfur (S8) cannot be broken down into simpler substances by these reactions.

Example: Water decomposes into a mixture of hydrogen and oxygen when an electric current is passed through the liquid. Hydrogen and oxygen, on the other hand, cannot be decomposed into simpler substances. They are therefore the elementary, or simplest, chemical substances - elements.

Each element is represented by a unique symbol. The notation for each element can be found on the periodic table of elements.

The elements can be divided into three categories that have characteristic properties: metals, nonmetals, and semimetals. Most elements are metals, which are found on the left and toward the bottom of the periodic table. A handful of nonmetals are clustered in the upper right corner of the periodic table. The semimetals can be found along the dividing line between the metals and the nonmetals.

Answer:

give him brainlyest my gye

Explanation:

Answer:

option A is the ans i think so

If an unknown solution has pH of 9 the solution is classified as a base as it has larger concentration of hydroxyl ions.

According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.

Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.

They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.

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Answer:

I think it's A or D

Explanation:

apologies if I get this wrong..

Answer:c.0

Explanation: hopefully this isn’t wrong, but wouldn’t it be 0 since it was something the mother did later on so it really wasn’t a trait of her? And also the mother didn’t born with a short tail?

Answer:

1, 2, 2, 1

Explanation:

This is basically the equation we're trying to balance:

Cu + AgNO₃ → Ag + Cu(NO₃)₂

We start with Copper (Cu): There is 1 atom on the reactants'(left) side and 1 atom on the products'(right) side which means it's balanced

The second is Silver (Ag): There is 1 atom on the reactants' side and 1 atom on the products' side which means it's balanced

The third is Nitrogen (N) and there is 1 atom on the reactants' side and 2 atoms on the products' side. We balance it by multiplying the reactants' side by 2

Cu + 2AgNO₃ → Ag + Cu(NO₃)₂

Silver is now imbalanced so we multiply the silver atoms on the product's side by 2

Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂

If you count them now, the atoms on each side are the same number

1 Copper atom on each side

2 Silver atoms on each side

2 Nitrogen atoms on each side

6 Oxygen atoms on each side (2 sets of 3 oxygen atoms)

1Cu + 2AgNO₃ → 2Ag + 1Cu(NO₃)₂

Answer:

2 ^0

Explanation:

Answer:

0

Explanation:

Water doesn't really have a charge

Answer:

eon,era,period,epoch,and age

Answer:

A. ionizing energy increases

A tabular form in which the chemical elements are positioned according to the chemical and physical attributes is called the periodic table. The horizontal rows from left to right is referred as periods in the table.

The correct option is:

Option A. Ionization energy increases

This can be explained as:

Therefore due to the high proton number, the ionization increases across the period.

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Answer:

1)conduction

2) convection

3) conduction

4) radiation

5) radiation

6) radiation

7) conduction

8) conduction

9) radiation

10) convection

Explanation:

not 100% sure

Answer:

Yellow bone marrow can be found in the long bones of the human body one such bone being the femur the yellow bone marrow contains certain stem cells which produce cartilage, fat and bone.

Explanation:

Answer:

Yellow bone marrow can be found within the medullary cavity. You see, the anatomy of a compact bone consists of blood vessels, cartilage, red bone marrow, etc. Within the bone there is spongy bone which holds the medullary cavity, and within this cavity there is yellow bone marrow.

Answer:

N have 8 13 neutrons.

Explanation:

Nitrogen-15      Nitrogen-20

     8                             13