Answer: 15 mol
Explanation:
From the equation, we know that for every mole of nitrogen consumed, 3 moles of hydrogen are consumed.
So, the answer is 5(3) = 15 mol
Electrical charge of an alpha particle is,
A. +1
B. +2
C. +3
D. +4
Explain why for static electricity to occur between two surfaces that are rubbed against each other, one of the materials has to be an insulator
When two surface come in contact and rub each other a frictional force causing them s deformation and this leads to a voltage giving rise to a static charge.
What is static charge?Static charge is developed within a body temporarily with an induced polarization. These charges are not moving and set into a pole in the material.
When two materials rub against each other in which one is a conductor and other to be an insulator, they will attract by the induced polarization. Rubbing causes the free electrons in the condutor to be transferred towards the insulator.
This will cause a deformation that, the random charges in the material get polarized where the electrons in the insulator will repel to the opposite pol and positive charges will align in a pole close to the condutor.
This charge separation causes the positive pole of the insulator gets attracted into the conductor surface. Hence, there forms a static electricity by the passage of electron.
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Does anyone have the chemistry paper 1 higher 2019 mark scheme thank you
no
Explanation:
i simply answered the question
you didnt ask for it you simply asked if i had it
being mad is no use, same with reporting and taking this down
in thoery my answer is correct
so, dont get mad, dot report, dont take this down
this is my protest
Energy that is made from the power of moving water
a
b
ОООО
wind
hydroelectric
coal
с
d
biomass
Hydroelectric energy is produced.
Read the given equation:
Ca(OH)2 + 2HCl - CaCl2 + 2H20
Which of the following is true about the equation? (5 points)
HCI is the base and Ca(OH)2 is the salt.
HCI is the acid and Ca(OH)2 is the salt.
Ca(OH)2 is the acid and Cacl2 is the salt.
Ca(OH)2 is the base and CaCl2 is the salt.
Answer:
D.
HCl is acid
Ca(OH)2 is base
CaCl2 is salt
In the given chemical equation Ca(OH)2 is the base and CaCl2 is the salt, thus option D is correct.
What is chemical equation?A chemical equation is a symbolic representation of a chemical reaction that shows the products, reactants, and direction of the reaction.
An acid is any hydrogen-containing substance that is capable of donating a proton (hydrogen ion) to another substance.
A base is a chemical species that donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution.
A salt, in chemistry, is defined as the product formed from the neutralisation reaction of acids and bases.
Therefore, in this chemical equation option D is true about the equation i.e
Ca(OH)2 is the base and CaCl2 is the salt.
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An electromagnetic wave has a wavelength of 4000 meters. What is this wave length and scientific notation?
A. 4.0 x 10-3 m
B. 4.0 x 10 3 m
C. 4.0 x 10 2 m
D. 4.0 x 10-2 m
Answer:
Wavelength of electromagnetic wave = 4.0 × 10³
Explanation:
Given:
Wavelength of electromagnetic wave = 4000 meter
Find:
Write, Wavelength of electromagnetic wave into scientific notation
Computation:
Wavelength of electromagnetic wave = 4000 meter
Wavelength of electromagnetic wave = 4.0 × 1,000 meter
Wavelength of electromagnetic wave = 4.0 × 10³
So,
Option "B" is the correct answer to the following question.
A chemical lab has isolated a metallic element from a compound. The metal
is highly reactive by itself and reacts with chlorine in a 1 to 1 ratio. In which
group of the periodic table is this element most likely found?
O A. 18
B. 17
C. 1
D. 2
SUBMIT
Answer:
C. 1
Explanation:
Group 1 metals are highly reactive (such as Sodium) and form 1 to 1 ratio of ions with halogens (such as chlorine, bromine etc).
This happens because group 1 element can donate 1 valence electron to fulfill their octet rule and halogens can receive 1 valence electron to fulfill their octet.
How much energy required to raise the temperature of lead by the same degrees.
Answer:
If a one kilogram block of lead absorbs 2,000 J of energy then the temperature rise will be larger. If 1,000 J of heat is absorbed by a 2 kg block of lead then the temperature of the block doesn't rise as much since the energy is shared between more particles.
Explanation:
If a mineral has a mass of 20 and a volume of 4, What is its density?
Answer:
5 g/cm^3
Explanation:
Density of a substance= mass/ volume
Given:
volume = 4,
mass = 20
Assume volume is in cm^3
Mass is in "g"
Then substitute the values
Density of the substance=( 20/4)
= 5 g/cm^3
Describe the concept of using radioactive elements to establish an age for a fossil. Be sure to include how the parent and daughter elements are used in the determination of age. Answer in 1 paragraph.
Answer:
The nuclear decay of radioactive elements is a process that is a useful tool for determining the absolute age of fossils and rocks. It is used as a clock, in which daughter elements or isotopes converted from parent isotopes by decaying at a particular time.
Radioactive decay rates are constant and do not change over time. It is measured in half-life. A half-life is a time it takes half of a parent isotope to decay and converted into a stable daughter isotope. How many parent isotopes and daughter isotopes present in the fossil or their abundance can help in determining the age of fossil or rock.
Where is glycogen stored? (choose all that apply)
muscles
bones
organs
skin
is A tomato smells rotten a chemical
reaction
Answer:
yup
Explanation:
because chemical change took place
the reaction cant be reversible
A sample of O2 with an initial temperature of 50.0 oC and a volume of 105 L is cooled to -25 oC. The new pressure is 105.4 kPa and the new volume is 55.0 L. What was the initial pressure of the sample? Show your work, using the G.U.E.S.S. method.
Answer:
71.92 kPa
Explanation:
Using the combined gas law equation;
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (kPa)
P2 = final pressure (kPa)
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information provided in this question;
T1 = 50°C = 50 + 273 = 323K
V1 = 105L
T2 = -25°C = -25 + 273 = 248K
P2 = 105.4 kPa
P1 = ?
V2 = 55.0 L
Using P1V1/T1 = P2V2/T2
P1 × 105/323 = 105.4 × 55/248
105P1/323 = 5797/248
0.325P1 = 23.375
P1 = 23.375 ÷ 0.325
P1 = 71.92 kPa
When a car uses a gallon of gas, how much carbon dioxide is emitted into the environment? I give branlyest
Answer:
19.5
Please tell me if wrong.
When a car uses a gallon of gas, 22.0 miles per gallon of carbon dioxide is emitted into the environment.
What happens when carbon dioxide is emitted?After being released into the atmosphere, carbon dioxide (CO₂) is initially quickly dispersed among the atmosphere, the upper ocean, and plants.
The sources of carbon dioxide emissions include both natural and human activities. Decomposition, oceanic discharge, and respiration are examples of natural sources.
The annual carbon dioxide emissions from a typical passenger automobile are around 4.6 metric tonnes. This estimates that the typical gasoline car on the road today gets roughly 22.0 miles per gallon of fuel and travels about 11,500 miles annually.
Thus, 22.0 miles per gallon of carbon dioxide is emitted into the environment.
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An ideal gas is contained in a cylinder with a volume of 5.0x102 mL at a temperature of 30°C and a pressure of 710. Torr. The gas is then compressed to a volume of 25 mL, and the temperature is raised to 820° C. What is the new pressure of the gas?
Answer:
51207 torr is the new pressure of the gas
Explanation:
We can solve this question using combined gas law that states:
P1V1T2 = P2V2T1
Where P is pressure, V volume and T absolute temperature of 1, initial state and 2, final state of the gas
Computing the values of the problem:
P1 = 710torr
V1 = 5.0x10²mL
T1 = 273.15 + 30°C = 303.15K
P2 = ?
V2 = 25mL
T2 = 273.15 + 820°C = 1093.15K
Replacing:
710torr*5.0x10²mL*1093.15K = P2*25mL*303.15K
3.881x10⁸torr*mL*K = P2 * 7.579x10³mL*K
P2 = 51207 torr is the new pressure of the gas
Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?
Answer:
Explanation:
Latent heat of fusion, also known as enthalpy of fusion, is the amount of energy that must be supplied to a solid substance (typically in the form of heat) in order to trigger a change in its physical state and convert it into a liquid (when the pressure of the environment is kept constant). For example, the latent heat of fusion of one kilogram of water, which is the amount of heat energy that must be supplied to convert 1 kg of ice without changing the temperature of the environment (which is kept at zero degrees celsius) is 333.55 kilojoules
The latent heat of fusion of a substance also accounts for the energy required to accommodate any increase in the volume of the substance post the change of its physical state. The temperature at which the substance undergoes the phase transition is called the melting point of the substance. Unless specified to be otherwise, the pressure of the environment (when expressing the latent heat of fusion of a substance) is always assumed to be 1 atmosphere of pressure (which is roughly equal to 101.325 kilopascals).
Para este mismo ejercicio, si se administran 2.5 litros de está solución (2,500ml) en un intervalo de 24 horas que cantidad en gramos de paciente en un día?
Answer:
Se administran 2500 gramos de solución por día.
Explanation:
Dado
Volumen de la solución = 2,5 litros
Como sabemos 1 litro = 1000 gramos
Por lo tanto, 2.5 litros = 2500 gramos
Se administran 2,5 litros en un intervalo de 24 horas o 1 día.
De ahí que se pueda decir que se administran 2500 gramos de solución al día.
What is diffusion? How does the motion of gas molecules explain how a gas diffuses throughout a room?
Answer:
Diffusion in gases
Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. The particles of smelly gas are free to move quickly in all directions
Explanation:
hope this helps
A physics experiment is conducted at a pressure of 14.0 kPa. What is this pressure in mmHg?
Answer:
18.4 mmHg. The answer is 18.4 mmHg.
Formulas for the compounds below.
Sulfur Trioxide
Sodium hydroxide
Sulphur Trioxide = So3
Sodium Hydroxide = NaoH
Answer:
[tex]\huge\boxed{Sulfur \ Trioxide\hookleftarrow}[/tex]
✐ SO3[tex]\huge\boxed{Sodium \ Hydroxide\hookleftarrow}[/tex]
✐ NaOHʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
# ꧁❣ RainbowSalt2²2² ࿐
what physical and social systems are involved in the service industry
Answer:
Hey mate.....
Explanation:
This is ur answer........
For example, the communications industry includes all of the physical and social systems that produce books, newspapers, magazines, radio and television broadcasts, billboard advertisements, Internet websites, telephones, and telecommunications, such as the GPS.
Hope it helps!
Brainliest pls!
Follow me! :)
How do you think the human population has changed over time? What makes you say that?
Answer:The world population increased from 1 billion in 1800 to 7.7 billion today. The world population growth rate declined from 2.2% per year 50 years ago to 1.05% per year. Other relevant research: World population growth – This article is focusing on the history of population growth up to the present.
Explanation:
what is love?
A)don't hurt me
B)don't hurt me
C)No more
Answer:
C
Explanation:
I think it is a ever lasting process of pain and happiness cause the ones that are closest to you can make it hurt most but they can also make your day So probably
What is the rate of diffusion of NO gas to CO gas?
Answer:
0.97
Explanation:
Let R₁ represent the rate of diffusion of NO.
Let R₂ represent the rate of diffusion of CO.
Molar mass of NO (M₁) = 14 + 16 = 30 g/mol
Molar mass of CO (M₂) = 12 + 16 = 28 g/mol
Thus, the rate of NO to CO can be obtained as follow:
R₁ /R₂ = √(M₂/M₁)
R₁ /R₂ = √(28/30)
R₁ /R₂ = √(28/30)
R₁ /R₂ = 0.97
R₁ : R₂ = 0.97
NO : CO = 0.97
Therefore, the rate of diffusion of NO to CO is 0.97
How do you convert from grabs to moles of a substance
1. Divide by the molar mass
2. Subtract the molar mass
3. Add the molar mass
4. Multiple by the molar mass
PLEASE HELP !!!
The correct question is as follows:
How do you convert from grams to moles of a substance
1. Divide by the molar mass
2. Subtract the molar mass
3. Add the molar mass
4. Multiple by the molar mass
Answer: In order to convert from grams to moles of a substance divide by the molar mass.
Explanation:
The number of moles of a substance is the mass of substance in grams divided by its molar mass.
The formula to calculate moles is as follows.
[tex]Moles = \frac{mass}{molar mass}[/tex]
This means that grams are converted to moles when grams is divided by molar mass.
Thus, we can conclude that in order to convert from grams to moles of a substance divide by the molar mass.
Im confused someone please help me
HELP ASAP
Which BEST explains the
relationship between the greenhouse
effect and global warming?
global warming causes the
greenhouse effect
greenhouse effect decreases
global warming
greenhouse effect increases
global warming
greenhouse effect is the same
as global warming
Answer:
greenhouse effect is the same as global warming
Explanation:
they both mean warming of the earths surface
what is chemical bonding?and types of chemical bonding there are?
Answer:
There are three primary types of bonding: ionic, covalent, and metallic. Ionic bonding. Definition: An ionic bond is formed when valence electrons are transferred from one atom to the other to complete the outer electron shell. Example: A typical ionically bonded material is NaCl (Salt).Explanation:
Hope it helps
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PLEASE PLEASE HELP CHEMISTRY
Sulfur (2.56 grams) was burned in a calorimeter with excess 02(g) . The temperature increased from 21.25C to 26.72C. The bomb had a heat capacity of 923 J/C, and the calorimeter contained 815 grams of water
Calculate the heat evolved as the sulfur burned:
Calculate the heat per mole of SO2 formed in the course of the reaction
S(s) + O2 (g) SO2 (g)
How many grams of NaCl are in 1.25 X 1024
molecules of Naci? Use one decimal place
Answer:
121.1g
Explanation:
First, we need to convert the number of molecules of NaCl to moles (n) by dividing by Avagadro number
That is, n = number of molecules ÷ 6.02 × 10²³
n = 1.25 X 10²⁴ ÷ 6.02 × 10²³
n = 1.25/6.02 × 10^ (24-23)
n = 0.207 × 10¹
n = 2.07moles
Using the formula; mole = mass ÷ molar mass
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
mass = molar mass × mole
mass = 58.5 × 2.07
mass = 121.1g