Chemistry High School

Mark brainly if answered correctly

Answers

Answer 1

ROW - ( 3 ) is correct

SYSTEM (A)

Respiratory system - here gaseous exchange takes place.

SYSTEM (B)

Digestive system - here nutrients from food is absorbed and assimilated .

SYSTEM (C)

Excretory system - removal of waste occurs

Related Questions

An element A has an atomic number of 11 and another element B has an atomic number 17 (A
and B are not actual chemical symbols of elements)
i. What group on the periodic table does A belong?
ii. What type of bond will be formed between A and B? Explain.
(2mks
(1ml
iii.
Write the formula of the compound that will be formed between A and B.
(lm
b. Arrange the species X, X5+ and X. in order of increasing size.

Answers

Answer:

can anyone tell me how to get +7!67:$'!$

What processes contribute water to surface water sources?(science)

Answers

Of the many processes involved in the water cycle, the most important are evaporation, transpiration, condensation, precipitation, and runoff. Although the total amount of water within the cycle remains essentially constant, its distribution among the various processes is continually changing.

For a solution, [H+] = 1 x 10-2M.
What is the pH?

Answers

Answer:

pH=2

Explanation:

-log(1 x 10-2)=2

What is the speed of a bird that flies 25 meters in 25 minutes?

Answers

Answer:

1mpm(1 meters per minute) Explanation: Speed:Distance/time 25/25=1 plz mark as brainliest

Answer:

1mpm(1 meters per minute)

21.82 L of 4.65 M HCl is added to 9.31 L of 8.55 M NaOH. What is the concentration of HCl in the resulting solution? **hint: make ICE table

A)1.90 M

B)0.952 M

C)10.3 M

D)0.702 M

E)0.644 M

Answers

Answer:

Explanation:

First you multiply 4.65 with 21.82 to get the mols of hcl, which is 101.463. Then you make an ice table. The ice table should look like this:

HCl + NaOH = 12NaCl + H2O

101.463 6.022e23 1.989e30

As the ice table above shows, you will have 1.989e30 mols of nacl after the reaction. With that information, you can then divide it by 2.833333333333333e30 to get 0.702 M.

Find the final product for: Li + Br and show work.

Answers

Lithium is atomic number 3, so it has valency 1

While, Bromine is atomic number 35, and has valency 1

Lithium has an extra electron while Bromine need an electron, since they both need and have one electron, the form

LiBr (Lithium Bromide) where Li is +ve charged and Br is -ve charged

Happy to help :)

NH₄⁺(aq)+NO₃⁻(aq) → NH₄NO₃(s)
How much energy is released when 3 moles of NH₄+ react?

1) -25.69 kJ
2) -51.38 kJ
3) -77.07 kJ
4) -102.76 kJ

Answers

I think the answer is number 3

A solution's hydrogen ion concentration is 1 x 10-SM.
What is the pH?

Answers

Answer:

the Ph is

Explanation:

90rn hub

What is represented by this notation?

Na loses one proton to Cl.
Na loses one electron to Cl.
Na gains two protons from Cl.
Na gains one electron from Cl.

Answers

Answer:

it's the third

Explanation:

I need to fill 20 spaces. don't mind that

Answer:

Na gains two protons from Cl.

Explanation:

this should help

Helllpppppppppppppppppppp

Answers

Answer:

90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on eight comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love you.!

Explanation:

Which type of stoichiometry problems does not require the use of molar mass?

Answers

Answer:

Explanation:

It is volume-volume problems that does not require the use of molar mass.

Your friend sits on a 25.0L exercise ball, squishing the ball so that it is only 17.5L. What is the pressure inside the ball if the outside air pressure is 100. kPa?

Use the Boyle's Law equation to determine the answer.

Answers

Answer:

Explanation: because i took the test and got a 100

science:my chosen place is bonifacio global city
i choose this place because?

Answers

Answer:

Rewrite the following sentence in reported speech

The chair person said,"A hearty welcome to all present!"

What are the chemical reactions involved in CO2 emission?

Answers

In co2 there’s combustion because it comes from burning fossil fuels

5 Protons {+}
5 Electrons {-}
6 Neutrons {0}
What element is this ?

Answers

Answer:boron

Explanation:

A sample of an unknown liquid has a volume of 12.0 mL and a mass of 6 g. What is its density?

A. 2 g/cm3
B. 0.5 g/cm
C. 5.0 g/cm3
D. 0.2 g/cm3

Answers

[tex]\large \mathfrak{Solution : }[/tex]

volume = 12 ml = 0.012 litres = 0.012 cm³

mass = 6 g

And the relationship between mass, volume and density can be depicted by :

[tex] \boxed{density = \dfrac{mass}{volume} }[/tex]

[tex]density = \dfrac{6}{0.012} [/tex]

[tex]density = \dfrac{6000}{12} [/tex]

[tex]density = 500 \: \: g/cm {}^{3} [/tex]

therefore, density = 500 g/cm³

is copper an elementary substance or a compound?

Answers

Elementary substance

Please help!!
The diagram shows the electron configuration of an atom of an element for the electrons in the s and p orbitals.
What is the group number of the element in the periodic table?

A) 1
B) 2
C) 13
D) 15

Answers

Answer:

Explanation:

because since the outer shell has 5 electron then add 5 and 10 to get 15

Which set of elements represents a period within the Periodic Table?

H, He, Ar , Xe , Rn ,

N, P, As, Sb , Bi

K, V, Fe, Ga , Kr

La, Pa, Sm, Tb, Yb

Answers

Which set of elements represents a period within the Periodic Table?

H, He, Ar , Xe , Rn ,

N, P, As, Sb , Bi

K, V, Fe, Ga , Kr

La, Pa, Sm, Tb, Yb Which set of elements represents a period within the Periodic Table?

H, He, Ar , Xe , Rn ,

N, P, As, Sb , Bi

K, V, Fe, Ga , Kr

La, Pa, Sm, Tb, Yb

Help plzzZZZZ I really need help with this

Answers

The link above is fake, they’re tricking you. But the caption would be something like this depending where you are In the learning point. The Caterpillar over time makes a cocoon for itself using its spit and over time they start to transform into a butterfly in their cocoon and when they’re ready, they eat their way through the cocoon. Hope it helps

What is one way that the kidneys help maintain homeostasis in the body?
A They regulate the temperature of the body
B They regulate the distribution of energy in the body
C They regulate the amount of oxygen in the body
D They regulate the amount of water in the body

Answers

Answer:

they regulate the amount of water in the body.

Explanation:

The kidneys help maintain homeostasis by regulating the concentration and volume of body fluids. For example, the amount of H+ and HCO3 - secreted by the kidneys controls the body's pH.

Ayúdenme por favor
Please help me

Answers

The answers are;
2H2+O2===>2H2O
N2+3H2==>2NH3
C3H8+5O2==>4H20+3CO2
CH4+2O2===>CO2+2H2O
2HBr +Fe==>FeBr2 +H2
I hope it helped

A solute can be obtained from a solution by...

Answers

Answer:

Evaporating the solvent

Explanation:

What is the atomic number of an atom? Why is this number important?

Answers

The number of protons in an atom is called its atomic number. This number is very important because it is unique for atoms of a given element. All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms

The thermal energy of matter increases when ___.

A. Heat flows of the matter
B. The mass of the matter decreases
C. Heat flows into the matter
D. The temperature decreases

Answers

A. heat flows of the matter is what i would put

Plants and animals both use the process of _____ to release stored energy.

Answers

Answer:

The sun.

Explanation:

Sun is the ultimate source of energy. All living things on the earth using the energy comes from the sunlight.

Plants using sunlight to fuel the process of photosynthesis. Photosynthesis is the process of transforming of water and carbon dioxide to oxygen and glucose. The amount of energy used to drive the photosynthesis process is stored in the glucose molecules.

Organism feed on plants and breaking down the glucose molecules to release the stored energy. The release energy is utilized by the cells present in the organisms.

Autotrophs also have the ability to make their own food, so they are also using the energy from the sun to make their food.

10 moles of potassium hydroxide in 5.16 L of solution

Answers

Answer:

The molarity is 8.52M

Explanation:

molality = moles of solute/kg of solvent = 5.2mol/kg

moles of solute = 5.2mole

mass of solute = moles of solute × MW = 5.2 × 56.106 = 291.8g

mass of solvent = 1kg = 1000g

Mass of solution = mass of solute + mass of solvent = 291.8g + 1000g = 1291.8g

Density of KOH = 2120g/L

Volume of solution = mass/density = 1291.8/2120 = 0.61L

Molarity = number of moles of solute/volume of solution = 5.2/0.61 = 8.52M

The concentration in the solution is 1.94 mol/L

From the question,

We are to determine the concentration of 10 moles of potassium hydroxide in 5.16 L of solution.

From the formula

Number of moles = Concentration × Volume

Then, we can write that

[tex]Concentration = \frac{Number\ of\ moles}{Volume}[/tex]

From the question,

Number of moles of potassium hydroxide (KOH) = 10 moles

Volume of solution = 5.16 L

∴ Concentration of the solution = [tex]\frac{10}{5.16}[/tex]

Concentration of the solution = 1.94 mol/L

Hence, the concentration in the solution is 1.94 mol/L

Learn more here: https://brainly.com/question/19196652

Here is the complete question:

Calculate the concentration in each of the following solutions:

1. 10 moles of potassium hydroxide in 5.16 L of solution

Which is NOT an application of chemistry to life? *

a. Fertilizers used by farmers

b. Soaps used to clean

c. Medicine used by doctors

d. Hammer used by construction worker

Answers

I’m pretty sure it’s D

If 190dm of hydrogen gas collected at 20°c and 760mmHg .Calculate it's volume at stp (standard pressure=760mmHg

Answers

Answer:

177.1 L

Explanation:

The excersise can be solved, by the Ideal Gases Law.

P . V = n . R . T

In first step we need to determine the moles of gas:

We convert T° from, C° to K → 20°C + 273 = 293K

We convert P from mmHg to atm → 760 mmHg = 1atm

1Dm³ = 1L → 190L

We replace: 190 L . 1 atm = n . 0.082 . 293K

(190L.atm) / 0.082 . 293K = 7.91 moles.

We replace equation at STP conditions (1 atm and 273K)

V = (n . R .T) / P

V = (7.91 mol . 0.082 . 273K) / 1atm = 177.1 L

We can also make a rule of three:

At STP conditions 1 mol of gas occupies 22.4L

Then, 7.91 moles will be contained at (7.91 . 22.4) /1 = 177.1L

Please help me classify properly.

Answers

Answer:C

Explanation:

Homogeneous Mixture

Answer:

homogeneous mixture

Explanation:

it is the same throughout so therefore it can be separated

Other Questions

PLZZZZZZ HELP Early in the novel, when the servant girl Martha asks Mary if she likes herself, Mary answers, no, she doesn't. Do you think Mary still dislikes herself by the end of the novel? Why or why not? Give at least 3 examples of evidence, The ________________ is the horizontal number line on the coordinate grid. What are 5 benefits of solar power? What is the mapping rule for a 180 rotation?(x, y) (y, x)(x, y) (y, x)(x, y) (y, x)(x, y) (x, y) how did Israel and Palestinian resolve conflict*keep simple* which statement is true about the reaction shown by this chemical equation HCl + NaOH ------> NaCl + H2O How to find the height of a cone when only radius is given What the debate for Dred Scott v. Sanford? Why did Lady Macbeth Collapse when she heard the death of Duncan? Pulmonary Company's perpetual inventory records indicate that $237,390 of merchandise should be on hand on June 30, 2016. The physical inventory indicates that $211,280 of merchandise is actually on hand. Journalize the adjusting entry for the inventory shrinkage for Pulmonary Company for the year ended June 30, 2016. Assume that the inventory shrinkage is a normal amount. Of all the students in a school, 2/9 of them are in sixth grade.a. How many sixth graders are there if the school has 90 students?b. How many sixth graders are there if the school has 27 students?c. If the school has x students, select the expression for the number of students in the school in terms of x.d. How many students are in the school if 42 of them are sixth graders? what if I committed suici How is engine power expressed? 5 points! Please dont guess if u dont know! Salts usually have a low melting point.A. trueB. false A student is shown a slide of cells from a species of a producerin a food web. The student observes that the cells havechloroplasts. What conclusion about the food web is bestsupported by these findings?oA. The producers capture energy from sunlight.B. The food web contains many herbivores and omnivores.C. The food web is found in a terrestrial ecosystem.D. The producers in the web are single-celled organisms. Sarah paid $0.75 for 3 limes. How much should she expect to pay for 5 limes at the same price?O $0.50O $1.00O $1.25O $2.25 Dr. Rodriguez does an experiment with bacteria. She starts with 100 bacteria and recordsthe number of bacteria every hour after the experiment starts. Assume that the bacteriagrowth continues in the pattern shown.Bacteria DataS9008007006005004003002001000023number of hours (x)A. How many bacteria will there be 5 hr after the experiment starts? Show yourwork algebraically, and explain how you found your answer.B. Write an exponential equation of the form ya.b to represent this situationExplain why you chose the values of a and b that you did.C. Using your equation from Part B. find how many bacteria there will be 8 hr afterthe experiment starts. Show your work algebraically, and explain how you foundyour answernumber of bacteria () Quincy measured a picnic area near the river and made a scale drawing. He used the scale 1 inch : 10 yards. In the drawing, the picnic area is 17 inches long. What is the length of the actual picnic area? In plants and animals, sexual reproduction causes variationwithin a species. This variation is vital to their survival. How doesgenetic variation affect a species' survival?A. A species with variation is more easily found by predators.B. A species that shows more variation will have a longer life cycle.C. A species that has no variation might eventually become extinct.D. A species without variation will overpopulate and produce newspecies. Which term best describes these lines?count = 0loop through listif basketball is found add one to countoutput countPython 3 codeselection programpseudocodesequential program