Answer:
[HNO₃] = 3.14 N
Explanation:
Relacionando normalidad con molaridad, ydado que el HNO₃ tiene solo un protón, ambas van a coinicidir asi que calculando la molaridad, será lo mismo decir que ese valor pertenece a la concentración normal.
Densidad de solución = 1.1 g/mL
Volumen de solución = 5L = 5000 mL
Masa de solución = 1.1 g/mL . 5000 mL = 5500 g
Ahora usamos el % p/p.
Si sabemos que en 100g de solución hay 18 g de soluto
En 5500 g de solución tendremos (5500 . 18) /100 = 990 g
Convertimos a moles = 990 g . 1mol /63g = 15.7 moles
Como el volumen de solución es 5L = 15.7 mol /5L = 3.14 M = 3.14N
Basicamente para calcular la normalidad hay que saber calcular los equivalentes de soluto los cuales se expresan como
masa de soluto / Equivalentes gramo, donde los equivalentes gramo se definen como el peso molecular /valencia. En este caso como el acido nitrico es monoprótico, la valencia es 1, y haciendo el procedimiento usando densidad de solución y el % peso en peso, ya sacamos la masa de soluto.
990 g / 63g/mol / 1 = 15.7 Equivalentes
N = Equivalentes/L de solucion → 15.7 Eq /5 L = 3.14N
The normality is 3.14 N
Given that the Density of solution = 1.1 g/mL
Volume = 5L = 5000 mL
So, Mass of solution = 1.1 g/mL . 5000 mL = 5500 g
Now we use % w/w.
Given that in 100g of solution there is 18 g of solute
Hence 5500 g of solution contains
(5500 . 18) /100 = 990 g of solute
As the volume of the solution is 5L, to calculate the normality of the solution
N = Mass of solute in grams/(volume of solution in litres × Equivalent weight)
Equivalent weight = molar mass/ number of hydrogen ions
here the number of H ions = 1
hence, equivalent weight = 63/1 = 63
The Normality is 990/(5×63) = 3.14N
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Which element has chemical properties most similar to carbon (C)?
A. Lithium
B. Silicon
C. Titanium
D. Neon
Answer:
b
Explanation:
Silicon has the chemical properties that are most similar to those of carbon
If the initial rate of H2 to disappear is 2.0 moles per second, what is the rate of appearance of NH3 at the same time? N2(g) 3 H2(g) ⇌ 2 NH3(g)
Answer:
1.33 moles per second
Explanation:
From the balanced equation of reaction, 3 moles of H2(g) need to disappear/be consumed before 2 moles of NH3(g) can be formed/appear.
According to reaction law, the rate of disappearance of reactants is equal to the rate of appearance of products.
Now, only 2 moles per seconds of H2 has disappeared initially;
3 moles H2 is needed for 2 moles NH3
2 moles H2 will give; 2 x 2/3 = 4/3 or 1.33 moles
Hence, if the initial rate of disappearance of H2 is 2.0 moles per second, the initial rate of appearance of NH3 would be 1.33 moles per second.
Which one of the following to all methods of heat transfer require?
a. A difference in thermal energy
b. A liquid or gaseous state
c. Direct physical contact
d. The movement of particles
Answer:
A
Explanation:
A difference in thermal energy
The study of chemicals is called chemistry.
The correct answer is A.
According to the law of thermodynamics, It states that heat transfers from the high temperature to the low temperature.
According to the question, heat transfer must require the temperature difference between the two systems and allow to flow from high temperature to low temperature.
Hence, the correct answer is A that is a difference in thermal energy
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A B C D ............
Answer:
I think gamma, I'm not sure tho
This is hard, isn't it? please help me though. PLEASE
Please help fast. I will give brainliest!
Answer:
c=-1+x=varible+a=(5)^3
Explanation:
facts
The following symbol (<-->) means
Answer:
Greater than or less than
Drag each item to show if it is matter or not matter.
light bulb added to
sunlight
heat
lamp
matter
light bulb
not matter
1. All the individuals of one type of clownfish ( e. species) living in a reef compose which level of organization?
How many moles of NaCl are contained in 100.0 mL of a 0.20 M solution?
Answer:
0.02 mol.
Explanation:
30 points please help
Answer:
its D I'm pretty sure because it's from high heat/pressure
What are the [H+] and [OH-] for a substance with a pH of 9.2? Show work please
Explanation:
[H+]=10^-pH
[H+]=10^-9.2
[H+]=6.031x10^-10
[OH-]=1x10^-14÷[H+]
[OH-]=1x10^-14÷[6.031x10^-10]
[OH-]= 1.66x10^-5
im pretty sure this is right
7. Where do amino acids reside ?
Answer:
Explanation:
Polar side chains tend to be present on the surface of a protein where they can interact with the aqueous environment found in cells. On the other hand, non-polar amino acids tend to reside within the center of the protein where they can interact with similar non-polar neighbors.
UGRENT! Please help showing all work
Answer:
a. Oxygen
b. 2.62 g of NO
c. 85.2%
Explanation:
Let's see the presented reaction:
4NH₃ + 5O₂ → 4NO + 6H₂O
4 moles of ammonia react to 5 moles of oyxgen in order to produce 4 moles of NO and 6 moles of water.
To determine limting reagent, we need moles of each reactant. Let's calculate them:
3.25 g /17 g/mol = 0.191 moles
3.50 g /32 g/mol = 0.109 moles
4 moles of amonia react to 5 moles of oxygen
Then, 0.191 moles will react to (0.191 . 5) / 4 = 0.238 moles
We only have 0.109 moles available and we need 0.238, so the oxygen is the limting reactant.
5 moles of O₂ can produce 4 moles of NO
So, our 0.109 moles will produce (0.109 . 4) /5 = 0.0872 moles
We convert the moles to mass: 0.0872mol . 30g/mol = 2.62g
(Yield produced / Theoretical yield) . 100 = %
(2.23g / 2.62g) . 100 = 85.2%
Can somebody help please
Answer:
98 moles of H₂O.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2HCl + CaCO₃ —> CaCl₂ + H₂O + CO₂
From the balanced equation above,
1 mole of CaCO₃ reacted to produce 1 mole of H₂O.
Finally, we shall determine the number of mole of H₂O produced by the reaction of 98 moles of CaCO₃. This can be obtained as follow:
From the balanced equation above,
1 mole of CaCO₃ reacted to produce 1 mole of H₂O.
Therefore, 98 moles of CaCO₃ will also react to produce 98 moles of H₂O.
Thus, 98 moles of H₂O were obtained from the reaction.
12) Balance the following chemical equation:
Zn +
H3PO4
Zn3(PO4)2 +
H2
Answer:
Sorry I am not very good at chemistry.
Explanation:
help..................
Answer:
Volcanic eruption
Explanation:
a crater is this bowl shaped hole in the ground, and it is caused by a meteorite or volcanic activity
Most of Earth's atmosphere is made up of nitrogen gas. Nitrogen can also
exist as a solid, liquid, or plasma. Four samples of nitrogen are each in a
different state but have the same mass. Which statement about the relative
amounts of thermal energy in the samples is true?
Answer:
it should be B (i did this wrk before)
Explanation:
What is the correct IUPAC name for the acid: H2Lv
50 points if its right In the Northern Hemisphere, choose ALL that apply
Question 2 options:
Summer solstice occurs when the Earth's North Pole is tilted toward the sun.
Fall and Spring Equinoxes occur when days and nights are equal in length.
The tilt and revolution of the Earth causes the seasons
Winter solstice occurs when the Earth's North Pole is tilted away from the sun.
Answer:
All are correct
Explanation:
I took the test
Answer: pick all
Explanation:
i got 100% on my qiuz
When determining an Empirical formula
a)you must change everything to percentages
b)you must use Avogadro's number
c)you must convert grams to moles
d)you must balance the equation
How many atoms of K are present in 195.49 grams of K?
Answer:
A- 3.0110 X 10^24
Explanation:
I took the quiz
The term mole concept is used here to determine the number of atoms of potassium. The number of atoms of potassium present in 195.49 grams is 3.011 × 10²⁴.
What is a mole?One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is given as:
Number of moles of atoms (n) = Given mass / Gram atomic mass
The given mass of potassium = 195.49 g
The atomic mass of 'K' = 39.098 g
n = 195.49 / 39.098 = 5 mol
Number of atoms = Number of moles of atoms × 6.022 × 10²³
5 mol × 6.022 × 10²³ = 3.011 × 10²⁴
Thus the number of atoms is 3.011 × 10²⁴ .
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How do changes to genes in body cells differ from changes to genes in egg and sperm cells?
Answer:
These genetic changes are not present in a parent's egg or sperm cells, or in the fertilized egg, but happen a bit later when the embryo includes several cells. As all the cells divide during growth and development, cells that arise from the cell with the altered gene will have the mutation, while other cells will not.
Explanation:
In the Haber reaction shown below, _______?is the
limiting reactant if equal moles of each reactant are used.
3H2 + N2 -> 2NH3
Answer: hydrogen
Explanation:
Which kingdom does spiny lobster, and diatom belong to?
Answer: The spiny lobster belongs to the kingdom ANIMALIA while diatoms belongs to the kingdom PROTISTA.
Explanation:
There are different ways biologists have used to examine and describe million kinds of living organisms. To classify organisms into groups, biologist look for important features that are shared by a large variety of organisms. These features which should have similar origin, structure and position. Organisms with certain important features in common are then put together into one group.
In the hierarchy of living organisms, the largest group of organisms is the KINGDOM. There are five types of kingdoms in which organisms are grouped, these includes:
--> kingdom Monera
--> kingdom PROTISTA,
--> kingdom fungi,
--> kingdom plantae and,
--> kingdom ANIMALIA.
Kingdom PROTISTA: they are single-celled, motile or non-motile organisms that are made up of eucaryotic cells, that is,cell structure is complex with a definite nucleus. Member include the DIATOMS, amoeba and chlamydomonas.
Kingdom ANIMALIA: They are multiple-celled, motile organisms that feed on other organisms. Their cells have no cell walls. The members include the SPINY LOBSTER, corals,worms, snails and cows
Find the mass of 1.59 mol of NH3.
Please show the work if you can!
Answer:
25.4/km=3
Explanation:
A H2CO3 (aq) ---> CO2 (g) + H2O (l) B H2SO4 (aq) + 2NaOH (aq) ---> Na2SO4 (aq) + 2H2O (l) C 2H2 (g) + O2 (g)----> 2H2O (l) D AgNO3 (aq) + NaOH (aq) ---> AgOH (s) + NaNO3 (aq) Which equation above represents a precipitation reaction?
Answer: [tex]AgNO_3(aq)+NaOH(aq)\rightarrow AgOH(s)+NaNO_3(aq)[/tex]
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.
The equation which represents a precipiation reaction is:
[tex]AgNO_3(aq)+NaOH(aq)\rightarrow AgOH(s)+NaNO_3(aq)[/tex]
Name the 6 kinetic factors
What organelle is sac like and stores different materials?
Group of answer choices
endoplasmic reticulum
vacuoles
ribosomes
Golgi Body
The sound of a trumpet ECHOES off a nearby mountain. This is which type of wave interaction?
Answer:
reflection
Explanation:
wave reflection is when a sound bounces off something it cannot go through, like echoing