A cell must work to maintain a stable internal environment. It is also important for the environment around the cell to be stable. What reasoning explains what happens when the concentration of water inside a cell is lower than the concentration of water outside the cell?


The cell loses nutrients.

The cell splits and creates two new cells.

The cell gains too many lipids and carbohydrates.

The cell either loses water and dries up or gains too much water and bursts.

(science 7th grade)

\(\begin{gathered} {\underline{\boxed{ \rm{\red{Mass \: = \: Density × Volume}}}}}\end{gathered} \)

\(\large\bf\blue{ \diamond} \: \rm \: \: 30 \: \times \: 2 \\ \\ \large\bf\blue{ \diamond} \: \rm \: 60 \: kg\)

Mass of object is 60 kg

Explanation:

They historically leading a migratory shabby chic life with respect to the experiences of humans in Ladakh and are genuine and trustworthy. About the profession of people in Ladakh, 90% of their rely for their subsistence on cultivation dependent on the River Indus. Corn, barley, bulgur, beans, canola and peanuts are their principal staple foods.

The percent error of the student’s measurement is 98.48%

While doing any experiment or any calculation we usually calculate the estimated result or value that needs to come at the end of the reaction and that is called as theoretical value. But once the experiment is completed the value that we get is not the same as that of theoretical value and this value is called as the experimental value.

To understand the error that had happened during the experiment we find out the percent error and the formula for it is as follows

Percent error =  Experimental value     × 100

                          Theoretical value

When we use the same formula for the above given case we can see that  the expected measurement was supposed to be 32.9 but the student measure it to be 32.4 so the percent error here is

= 32.4  × 100 ⇒ 98.48%

   32.9

Hence the percent error in calculation is 98.48%

To know more about percent error

https://brainly.com/question/5463769

#SPJ1

A neutral atom of on element has two electrons with n=1, eight electrons with n=2, eight electrons with n=3 and one electron with n =4 and has mass number of 39 then the atomic number of element is 39 and number of neutron in the nucleus is 50 and total number of s electron is 2 and total number of p electron is 8 and the group is 3rd group

Yttrium is a metallic element with atomic number 39 usually included in the rare earth group that occur usually with other rare earth element in minerals and is used especially in phosphorous and YAG laser and alloy etc and element with mass number of 39 is yttrium and the atomic number of element is 39 and number of neutron in the nucleus is 50 and total number of s electron is 2 and total number of p electron is 8 and the group is 3rd group

Know more about element

https://brainly.com/question/12054275

#SPJ1

The answer option which indicates a true relationship is: A. Higher-energy light has a higher frequency  than lower-energy light does.

A wave can be defined as a disturbance in a medium that progressively transports energy from its source to another location, without an equivalent transportation of matter.

In Science (Physics), there are two main types of wave:

Light energy is an example of electromagnetic wave because it does not require a medium of propagation for it to travel.

Hence, light energy can travel through a vacuum (space), where no particles exist.

In Science, light energy are grouped into two main categories and these are:

I. Higher-energy light: it has a higher frequency in comparison with others.

II. Lower-energy light: it is typically characterized by a lower frequency.

In conclusion, a higher-energy light has a higher frequency  while lower-energy light has a lower frequency.

Read more: https://brainly.com/question/23460034

Answer:

A. Higher-energy light has a higher frequency than lower-energy light does.

Explanation:

Correct Answer

Answer:

First of all list the given before starting to solve

GIVEN:

C= 66.7%

H=11.1%

O= 100-66.7-11.1= 22.2%

In any empirical formula problem you must first find

look u should memories the steps all to find it but if ur given the percentage already so no need to find the mass bcz in the first place we find the mass just to find the percentage.

now change the percentage we have in each element to 100grams now u would ask why 100g and not 1g well , we chose 100 bcz it's percentage and easier to calculate.

after converting all to grams

follow another formula

\(n = \frac{mass}{molar \: mass} \)

n represents number of moles

so apply to each , but for the molar mass u either should be given

H= 1 g/mol

C=12g/mol

O=16g/mol

apply it for each

HOPE U UNDERSTOOD IT

The answer is: The electronic configuration of Nitrogen is \(1s^22s^22p^3\).

Electronic configuration: The electronic configuration is defined as the distribution of electrons of an atom in the atomic or molecular orbitals and is written using the labels for the subshell.

How to decide which orbital is filled first?

(Shown in image)

         \(1s^22s^22p^3\)

To learn  more about the electronic configuration, visit:

https://brainly.com/question/21977349

#SPJ4

Nitrogen's complete electron configuration is 12s2s22p3.

The shorthand electron configuration for noble gases is [He] 2s22p3. Nitrogen has an atomic number of 7. The nitrogen atoms' nucleus contain this many protons. An atom that is neutral has an equal number of protons and electrons. Thus, the ground state electron configuration will consist of 7 electrons in the suitable s and p orbitals (state of lowest energy). For nitrogen, the entire electron configuration is 1s22s22p. Scientists may easily express and explain how the electrons are organized around the nitrogen atom's nucleus by using the configuration notation for nitrogen (N). As a result, it is simpler to comprehend and forecast how atoms will cooperate to form chemical bonds.

Learn more about electronic configuration here-

https://brainly.com/question/11309892

#SPJ9

Answer: ea sports

Explanation:

A compound is a substance that contains two or more elements chemically combined in a fixed proportion. However, it is not an element because it can be broken down into simpler substances – carbon and hydrogen. ... Recall that the components of a mixture can be separated from one another by physical means.

Answer:

526g is the mass of this sample

Explanation:

To solve this question we must, as first, find the molar mass of Al₂(Cr₂O₇)₃ using the periodic table. The molar mass is defined as the mass of this compound per mole. With this value we can find the mass in 0.750 moles as follows:

Molar mass Al₂(Cr₂O₇)₃

2Al = 2*26.98g/mol = 53.96g/mol

6 Cr = 6*51.9961g/mol = 311.9766g/mol

21 O = 21*15.999g/mol = 335.979g/mol

53.96g/mol + 311.9766g/mol + 335.979g/mol

= 701.9156g/mol

The mass of 0.750 moles is:

0.750 moles * (701.9156g / mol) =

Answer:

sorry my phone died lol but here are the answers

<3

Answer:

Osmium

Explanation:

Answer: 2SeO2(s)+O2(g)+2H2O(l)→2H2SeO4(aq)

Explanation:

Start with the unbalanced equation by writing chemical formulas for each of the reactants and products:

SeO2(s)+O2(g)+H2O(l)→H2SeO4(aq)

Count the number of each atom on each side of the equation to determine whether the equation is balanced:

Reactants: 1 Se atom, 5 O atoms, 2 H atoms

Products: 1 Se atom, 4 O atoms, 2 H atoms

Balance the number of oxygen atoms by adding a coefficient of 2 to aqueous selenic acid on the products' side of the reaction. Then, balance the hydrogen atoms by adding a coefficient of 2 to liquid water on the reactants' side of the reaction. Finally, balance the selenium atoms by adding a coefficient of 2 to solid selenium dioxide on the reactants' side of the reaction to give the following balanced equation:

2SeO2(s)+O2(g)+2H2O(l)→2H2SeO4(aq)

The balanced chemical equation for this reaction is

\(\rm2SeO_2(s) + O_2(g) + 2H_2O(l) \rightarrow 2H_2SeO_4 (aq)\)

A balanced chemical equation is defined as a chemical reaction in which the number of atoms of each elements in the reaction and the total charge is same for both the reactants and the products.

It involves the addition of stoichiometric coefficients of the reactants and products.

Selenic acid is majorly used in protecting and changing the color of steel, especially the steel parts on firearms.

Thus, the balanced chemical equation for this reaction is

\(\rm2SeO_2(s) + O_2(g) + 2H_2O(l) \rightarrow 2H_2SeO_4 (aq)\)

To learn more about balanced chemical equation, refer to the link below:

https://brainly.com/question/28294176

#SPJ2

Answer:

the moon gets infront of the sun

Answer:

A solar eclipse happens when the moon moves in front of the Sun as seen from a location on Earth. During a solar eclipse, it gets dimer and dimmer outside as more and more of the Sun is covered by the Moon. During a total eclipse, the entire Sun is covered for a few minutes and it becomes very dark outside. The temperature outside also drops.

2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams. Density is the mass of a specific material per unit volume.

Density is the mass of a specific material per unit volume. Density is defined as d = M/V, in which d represents density, M is weight, as well as V is volume. Density is generally expressed in grams every cubic centimetre. Water, for example, has a density of 1 gram per square centimeter, but Earth has a density of 5.51 kilograms per cubic centimetre.

Density is sometimes measured in kilos per cubic centimeter (in metre-kilogram-second or SI units). The density of air, for example, is 1.2 kilos per cubic metre. 

density = mass / volume

            =53/ 20

            =2.65g/ml

Therefore, 2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams.

To learn more about density, here:

https://brainly.com/question/13434141

#SPJ1

The heat capacity corresponds to the energy needed to raise one degree of temperature for one gram of substance. That is, the greater the heat capacity, for the same mass, the greater the energy required to raise the temperature of the material.

Therefore, between the two metals with the same mass, the same initial temperature, and the same heat added, we can say that the one with the higher heat capacity will present a lower final temperature.

Answer:

This is a precipitation reaction: Ni(OH)2 is the formed precipitate.

Reactants:

NaOH

Names: Sodium hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Caustic soda source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Lye source: wikidata, accessed: 2019-09-02

Appearance: White, waxy, opaque crystals source: wikipedia, accessed: 2019-09-27; White hygroscopic solid in various forms source: ICSC, accessed: 2019-09-04; Colorless to white, odorless solid (flakes, beads, granular form). source: NIOSH NPG, accessed: 2019-09-02

NiCl2

Products:

NaCl – Sodium chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02

Other names: {{unbulleted list source: wikipedia, accessed: 2019-09-27, Salt source: wikidata, accessed: 2019-09-02, Table salt source: wikidata, accessed: 2019-09-02

Appearance: Colorless cubic crystals source: wikipedia, accessed: 2019-09-27

Ni(OH)2 – Nickel(II) hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02

Other names: Nickel hydroxide source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02, Theophrastite source: wikipedia, accessed: 2019-09-27

Appearance: Green crystals source: wikipedia, accessed: 2019-09-27

Search by reactants (NaOH, NiCl2)

1 NaOH + NiCl2 → NaCl + Ni(OH)2

2 NaOH + Br2 + NiCl2 → NaCl + NaBr + Ni(OH)3

Search by products (NaCl, Ni(OH)2)

1 NaOH + NiCl2 → NaCl + Ni(OH)2

Search by reactants (NaOH, NiCl2) and by products (NaCl, Ni(OH)2)

1 NaOH + NiCl2 → NaCl + Ni(OH)2

Explanation:

Answer: I'm going to say it's Antartica because the only seasons it have is summer and winter and it doesn't change.

Explanation:

56.5

Explanation:

the degradation would be 28.25 times 2

Answer:

The correct answer is D hydrogen and chlorine need to be balanced there's an equal amount of magnesium on each side. I just took the test and got the correct answer.

Explanation:

Answer:

Explanation:

1,2,4,

The equations that show combustion are equations A, B and D.

When we talk about combustion, the idea is that the substance would be burnt in oxygen. In other words, the combustion can be taken to be an oxidation reaction. It is an oxidation reaction in the sense that the oxidation number of the substance that is reacting with the oxygen would become increased.

When we look at the equations that we have, it is quite easy to pick out among the balanced reaction equations that are shown here the ones that has to do with the burning of the substance in oxygen and a consequent rise in the oxidation number.

Learn more about combustion:https://brainly.com/question/15117038

#SPJ1

Answer:

Yes it is stable because they are both sharing electrons resulting in stability.

Explanation:

As combustion always result into the formation of water, the other type of reactions that may result into formation of water are Acid-Base Neutralization Reactions and Hydrogen and Oxygen Reaction.

Acid-Base Neutralization Reactions:

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products.

H⁺ ions and OH⁻ ions combine to generate water during a neutralisation reaction. Acid-base neutralisation is the most common type of neutralisation reaction.

Example: Formation of Sodium Chloride (Common Salt):

HCl + NaOH → NaCl + H₂O

Hydrogen and Oxygen Reaction:

Water vapour is created when hydrogen gas (H₂) and oxygen gas (O₂) are combined directly. This reaction produces a lot of heat and releases a lot of energy.

Example: 2 H₂ + O₂ → 2 H₂O

Learn more about reactions:

https://brainly.com/question/25769000

answer and explanation

we know that Boyle's law states that the volume of a gas at a constant temperature varies inversely with pressure exerted on it. mathematically this can be described by:

PV= k

and we know that Charle's law states that the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the Pressure remains constant. mathematically this is

V/T = k

these can be combined to give the combined gas law which basically states that as long as the amount of gas doesn't change, the ratio between Volume-Pressure and Temperature of a system is constant.

mathematically this can be represented as:

k = PV/T

Answer:

I think it's B

Explanation:

I dont have much experience with the periodic table, but I just think its B.

Answer:

it's either B or C

Explanation:

I don't have that much experience for this but im giving you my honest answer i hope this will help ;3

Problem 1:

we need 80 g of the 15% solution and 120 g of the 20% solution.

Let x be the mass of the 15% solution needed and y be the mass of the 20% solution needed.

x + y = 200 (total mass of the two solutions)

0.15x + 0.2y = 0.17(200) (total amount of solute in the two solutions)

Solving these equations,  x = 80 g and y = 120 g.

Therefore, we need 80 g of the 15% solution and 120 g of the 20% solution.

Problem 2:

we need 120 g of the 18% solution and 180 g of the 5% solution.

Let x be the mass of the 18% solution needed and y be the mass of the 5% solution needed.

x + y = 300

0.18x + 0.05y = 0.07(300)

Solving these equations, x = 120 g and y = 180 g.

Therefore, we need 120 g of the 18% solution and 180 g of the 5% solution.

Problem 3:

The mass percentage of the final solution is 135 g/550 g × 100% = 24.55%.

The total mass of the final solution is 200 g + 350 g = 550 g.

The total amount of solute in the final solution is:

0.15(200 g) + 0.20(350 g) = 65 g + 70 g = 135 g.

Therefore, the mass percentage of the final solution is 135 g/550 g × 100% = 24.55%.

Problem 4:

The mass percentage of the final solution is 110 g/335 g × 100% = 32.84%.

The total mass of the final solution is 300 g + 35 g = 335 g.

The total amount of solute in the final solution is:

0.15(300 g) + 35 g = 75 g + 35 g = 110 g.

Therefore, the mass percentage of the final solution is 110 g/335 g × 100% = 32.84%.

Problem 5:

The mass percentage of the final solution is 18.18%.

Calculate the final mass of the solution:

Final mass = 400 g + 150 g = 550 g

Calculate the mass of solute in the 25% solution:

Mass of solute = 0.25 x 400 g = 100 g

Calculate the mass percentage of the final solution:

Mass percentage = (mass of solute ÷ final mass) x 100%

Mass percentage = (100 g ÷ 550 g) x 100%

Mass percentage = 18.18%

To know more about mass of solutions, visit:

https://brainly.com/question/29482678

#SPJ1

Assertion is correct statement but reason is wrong statement.

Assertion is correct statement but reason is wrong statement.Matter can neither be created nor destroyed is a statement of the law of conservation of mass.

Matter can neither be created nor destroyed is a statement of the law of conservation of mass.The assertion is correct but the reason is incorrect.

Answer:

sis aap ye I'd seach karke follow karo ok plz

Explanation:

baad me unfollow kar dena

XxcutemudaxX

To know the end point we use phenolphthalein as indicator. End point is a point where completion of reaction happen. Therefore, to improve the plan, student can follow the given techniques.

Titration is a technique by which we know the concentration of unknown solution using titration of this solution with solution whose concentration is known.

The balanced equation is

NaCl + H\(_2\)SO\(_4\)\(\rightarrow\) HCl + Na\(_2\)SO\(_4\)

The changes that the student could make to improve his plan are

Use the indicator to know the end point.

solution should be kept in clean beaker.

Solution should be standardised.

Burette should be clamped perfectly.

Therefore, to improve the plan, student can follow the above techniques.

To know more about titration, here:

https://brainly.com/question/13307013

#SPJ1