Answers
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
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.
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
5 Protons {+}
5 Electrons {-}
6 Neutrons {0}
What element is this ?
Answers
Answer:boron
Explanation:
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
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
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
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 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
Help plzzZZZZ I really need help with this
Answers
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)
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
A solution's hydrogen ion concentration is 1 x 10-SM.
What is the pH?
Answers
Answer:
the Ph is
Explanation:
90rn hub
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
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:
b
Explanation: because i took the test and got a 100
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.
A solute can be obtained from a solution by...
Answers
Answer:
Evaporating the solvent
Explanation:
is copper an elementary substance or a compound?
Answers
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:
D
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.
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:
Ayúdenme por favor
Please help me
Answers
2H2+O2===>2H2O
N2+3H2==>2NH3
C3H8+5O2==>4H20+3CO2
CH4+2O2===>CO2+2H2O
2HBr +Fe==>FeBr2 +H2
I hope it helped
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
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
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:
15
Explanation:
because since the outer shell has 5 electron then add 5 and 10 to get 15
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
For a solution, [H+] = 1 x 10-2M.
What is the pH?
Answers
Answer:
pH=2
Explanation:
-log(1 x 10-2)=2
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 :)
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
What processes contribute water to surface water sources?(science)
Answers
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
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.