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Answer: 2 The Proximity toward the ocean
Explanation:
May i plz have brainiest
Para solucionar el ejercicio primero se debe conocer el número atómico de los elementos para determinar cuantos electrones tiene cada uno N: número atómico 7, tiene 7 electrones Nivel 1: 2 electrones Nivel 2: 5 electrones P: número atómico 15, tiene 15 electrones Nivel 1: 2 electrones Nivel 2: 8 electrones Nivel 3: 5 electrones Cl: número atómico 17, tiene 17 electrones
Answer:
El número atómico se refiere al número de protones o electrones de un átomo.
Explicación:
El número atómico se refiere a la cantidad de protones o la cantidad de electrones que giran alrededor de las capas u órbita de un átomo, por lo que el número atómico 7 representa que el átomo tiene 7 electrones o protones mientras que, por otro lado, el número atómico 17 muestra el número de electrones o protón. Solo hay dos electrones que entran en la primera órbita y en el resto de las capas tiene espacio para 8 electrones por lo que los átomos pierden o agregan electrones en su capa más externa para obtener estabilidad.
What is the formula for cr2+ no2-
Answer:
Cr (NO2) 2
Explanation:
................
Can someone balance this equation
CH₄ + 2O₂ = CO₂ + 2H₂O
ASAP!!!
As current flows through a system, what happens to the voltage available at each load?
Answer:
The relationship between Voltage, Current and Resistance forms the basis of Ohm's law. In a linear circuit of fixed resistance, if we increase the voltage, the current goes up, and similarly, if we decrease the voltage, the current goes down.
If 3.91 moles of H2 were used, how many moles of NH3 would be made?
HELP PLEASE ASAP
N + H2 → NH3
balance the equation
2N + 3H2 → 2NH3
3H2 → 2NH3
3 : 2
3.91 ÷ 3 = 1.303 mol
1.3 × 2 = 2.606 mol
Can anyone solve this chemical reaction?
Answer:
1) BaCl2 + Na2O = BaO + 2NaCl
2) C4H8 + 6O2 = 4CO2 + 4H2O
3) MgCO3 + 2K = K2CO3 + Mg
4) N2 + 3F2 = 2NF3
An industrial synthesis of urea obtains 87.5 kg of urea upon reaction of 68.2 kg of ammonia with excess carbon dioxide. Determine the theoretical yield of urea and percent yield for the reaction.
Answer:
The theoretical yield of urea = 120.35kg
The percent yield for the reaction = 72.70%
Explanation:
Lets calculate -
The given reaction is -
[tex]2NH_3(aq)+CO_2[/tex] →[tex]CH_4N_2O(aq)+H_2O (l)[/tex]
Molar mass of urea [tex]CH_4N_2O[/tex]= 60g/mole
Moles of [tex]NH_3[/tex] = [tex]\frac{62.8kg/mole}{17g/mole}[/tex] (since [tex]Moles=\frac{mass of substance}{mass of one mole}[/tex])
= 4011.76 moles
Moles of [tex]CO_2[/tex] = [tex]\frac{105kg}{44g/mole}[/tex]
= [tex]\frac{105000g}{44g/mole}[/tex]
= 2386.36 moles
Theoritically , moles of [tex]NH_3[/tex] required = double the moles of [tex]CO_2[/tex]
but , [tex]4011.76<2\times 2386.36[/tex] , the limiting reagent is [tex]NH_3[/tex]
Theoritical moles of urea obtained = [tex]\frac{1 mole CH_4N_2O}{2mole NH_3}\times4011.76 mole NH_3[/tex]
= [tex]2005.88mole CH_4N_2O[/tex]
Mass of 2005.88 mole of [tex]CH_4N_2O[/tex] =[tex]2005.88 mole \times\frac{60g CH_4N_2O}{1mole CH_4N_2O}[/tex]
= 120352.8g
[tex]120352.8g\times \frac{1kg}{1000g}[/tex]
= 120.35kg
Therefore , theroritical yeild of urea = 120.35kg
Now , Percent yeild = [tex]\frac{87.5kg}{120.35kg}\times100[/tex]
72.70%
Thus , the percent yeild for the reaction is 72.70%
A bag contains 3 red marbles, 3 blue marbles and 1 green if a marble is drawing from the bag at random what is the chance of the marble being blue
Answer:
three-seventh
Explanation:
A student investigates the speed of a ball rolling down a ramp. The student records their data in the table below. Which of these best explains the student’s data?
A. The speed of the ball increases as the ball rolls down the ramp because the force acting on the ball is greater than the force of gravity.
B. The speed of the ball increases as the ball rolls down the ramp because the forces acting on the ball are unbalanced.
C. The speed of the ball decreases as the ball rolls down the ramp because the forces acting on the ball are balanced.
D. The speed of the ball decreases as the ball rolls down the ramp because of friction between the ball and the ramp.
Answer:
b
Explanationbecause i took the test and got a 100
Please help me with this
Answer:
no se
ablar inglés losiento princesa
por que todo me sale en inglés?
Explicación?:
Question 7 (1 point
What is the general pattern seen in the periodic table that helps a person quickly identify if an element is a nonmetal? (Where are nonmetals
generally found on the periodic table?)
Answer:
the elements to the right including hydrogen
Explanation:
as you know non-metal tend to gain eletrons
basically group 5, 6, and 7 are nonmetals
group 1, 2, and 3 are metals and group 4 are transitional metals so be careful with group 4
A sample of a compound containing only carbon and hydrogen atoms is completely combusted, producing
11.0 g of CO, and 4.5 g of H,O.
Which of the following is the empirical formula of the compound?
Choose 1 answers
CH
B
CH
CH3
C2H
The empirical formula will be C2H.
What is empirical formula?The easiest whole-number proportion of the numerous elements in a molecule is represented by an empirical formula.
Calculation of empirical formula
Given data:
C = 11.0 g
H = 4.5 g
The atomic mass of C = 12
The atomic mass of H = 1
Now, divide the mass by atomic mass.
1) For carbon atom= 11 / 12 =0.91
2) For hydrogen atom = 4.5 / 1=4.5
Now, divide the lowest term by the obtaining whole number.
1) For carbon atom = 11/ 0.91 = 12
2) For hydrogen atom = 4.5/0.91 = 5
Therefore, the empirical formula will be C2H,
To know more about empirical formula
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3. The mass percent of nitrogen in NH4Cl is *
O 16.7% nitrogen
0 25.0% nitrogen
0 26.2% nitrogen
O none of these
Answer:
None of these
Explanation:
The mass percent is 35.4% (3 s.f.)
14/4+35.5 = 14/39.5 x 100 = 35.4 (3 s.f.)
Will award brainliest! Between which two ionization energies would you expect to see the biggest jump for calcium? A. 11-12
B. 12-13
C. 13-14
D. 14-15
answer:lettter B that is answer
Which of the following compounds, sodium bicarbonate or water, should be used to extinguish a grease fire?
Answer:Douse the fire with baking soda: The chemical compound sodium bicarbonate, commonly called baking soda, is effective for extinguishing this type of fire. It takes a lot of baking soda to smother a grease fire, so pour it on while the flames are still small for the greatest effect
Explanation:
The grease fire has been put down by the addition of sodium bicarbonate as the extinguisher.
Grease fire has been defined as the fire that has been started with the over heating of the cooking oil at home. The fire has been started with the burning of the flammable liquids.
Extinguishing Grease fireThe fire in the cooking oil has been controlled with the addition of the sheet over the fire and turning off the flame.
The addition of water to grease fire results in the splashing of water over the fire and the spreading, resulting in the hazardous effects.
The sodium bicarbonate or baking soda has been used to put down grease fire.
Learn more about grease fire, here:
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Below are is a before and after particle diagram that shows the process of
condensation. Choose the statement below that best describes how the
particles changed in their arrangement during this process.
Attempt d
2 Minute
Before: Gas 100 C
After: Liquid 30 C
Answer:
It must first melt to become a liquid and then evaporate to become a gas
Explanation:
The leaves of African violets develop roots and form new
plants when they are placed in water or moist soil. Any leaf
'on the African violet plant shown can produce a new
African violet plant.
Which two terms best describe this kind of reproduction?
O A. Sexual reproduction
B. Vascular reproduction
O O O O
C. Vegetative reproduction
D. Asexual reproduction
Help pls
Answer:
vegetative reproduction and asexual reproduction
Explanation:
Answer:
Asexual and vegetation reproduction
Explanation:
How many grams are in 26 moles of
magnesium hydroxide?
1,516.31168 grams of Magnesium Hydroxide
True or false: The phenolphthalein indicator changes colour close to the point of neutralization which shows the end-point of the titration.
Answer:
True
Explanation:
A titration can be defined as the experiment where the volume of known con concentration is mixed into another solution whose concentration is not known.
Most of the titration are acid-base titration. When performing titration the indicator which is used is usually phenolphthalein. The end point of the titration is the point where the indicator changes its color.
In case of acid base reaction, the end point is achieved when the phenolpthalein turns faint pink in color from transparent.
Hence, the given statement is correct, the indicator changes its color close to the end point of titration.
Compared with halogens, the alkali metals in the same period has
electronegativity
the same
O larger
O smaller
are you doing work when u are cleaning your teeth
Answer: Yes you are.
Explanation:
A deep teeth cleaning can remove a buildup of plaque and tartar on your teeth, reducing gum inflammation and improving gum health. Plaque is a sticky film that forms on teeth. It contains bacteria and develops when food particles mix with saliva. You can remove plaque, which collects on teeth daily, by brushing your teeth.
HELP!!!!
please omg
Answer:
I believe it's A. to reduce air bubbles. Tbh, it's been a while
True or false? To prepare 20.0 mL of 2.00 M solution of hydrochloric acid from a 10.0 M stock solution, you should take 4.00 mL of the stock solution and add 20.0 mL of water.
False. To prepare 20.0 mL of 2.00 M solution of hydrochloric acid from 10.0 M stock solution, 4.0 mL of the stock solution and 16.0 mL of water would be needed.
Recall the law of diffusion that:
C1V1 = C2V2, where C1 = initial concentration, V1 = initial volume, C2 = final concentration, and V2 = final volume.
In this case, if C1 =10.0 M, V1 = ?, C2 = 2.00 M and V2 = 20.0 mL
V1 = 2 x 20/10
= 4.0 mL
Hence, 4.0 mL of the stock solution would be taken. Since the final volume is 20.0 mL, only 16.0 mL of water would need to be added and not 20.0 mL.
More on dilution can be found here: https://brainly.com/question/13844449
State TWO ways in which stress could impact negatively on student's
performance at College or university.
Two ways that stress could negatively impact a students performance is by causing them to procrastinate. When you're stressed, you tend to keep putting things off because you "just can't deal with it" at the moment. This could cause the student to turn in their assignments late (or not at all) and cause their grades to drop. Additionally, when you're stressed, it's harder to fall asleep, and once you are, you don't sleep as well. Sleep deprivation can greatly affect a student's in class performance by causing them to fall asleep in class, or not pay attention as well.
The nucleus of an atom is ______ charged
Answer:
The nucleus of an atom is positively charged.
Explanation:
The nucleus of an atom is positively charged because :
The nucleus is a small dense region at the center of the atom. It consists of a positive protons and neutral neutrons. so, It has an overall positive charged.
Each element has its own set of characteristic absorption lines because Each element has its own set of characteristic absorption lines because the temperature of each element can varies. electron energy levels differ for each element. elements can exist in different forms of matter. absorption lines depend upon the speed of the object. each element has a different mass.
Answer:
Question is unclear
Explanation:
Answer:
what ru asking dear??? write question properly ??? Write the correct question from next time.
What term is used to define when a substance reacts quickly with oxygen to produce light and heat?
A. rusting
B. sublimation
C. precipitation
D. burning
Answer:
I think it's a
Explanation:
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Answer: The answer is, D) Burning.
Explanation: Some moderator removed my last answer because someone reported it.
¿Qué energías son usadas en la fabricación de las llantas desde la obtención de materia prima caucho natural, hasta el producto terminado ?
Answer:
yo te diria que el elastico amigo es esa
You are on vacation with your family up in the mountains. Your friend is on vacation near the equator by the ocean. Explain which climate will experience the most precipitation.
A.) Both climates will have the same amount of precipitation.
B.)The ocean climate will have less precipitation because it is close to sea level.
C.)The climate around the equator will have more precipitation because it is very hot.
D.)The mountain climate will have more precipitation because it increases with elevation.
Answer:
I gonna go wit number C
Explanation:
Answer: C
Explanation: