Answer:
I dont really understand your question. but maybe this might help.
https://quizlet.com/283377931/radiation-flash-cards/
Explanation:
periodic table
fill in the box :)
Answer:
I took a screen shot of your image, and wrote on top of it!
Explanation:
Hope this helps! :)
What is the mass of 0.0071 moles of lead?
Answer: 1.47 g
Explanation:
207.2 g/mol × 0.0071 mol = 1.47 g
You can find the molar mass of lead, Pb, on the periodic table, 207.2 g/mol.
0.0071 moles lead = 1.47112 grams
If a reaction occurs between a compound that has a lemon smell and one that has a rose smell
what will the product smell like?
Leron Smell
Rose Smell
Smell?
+
A
The product will smell of lemon.
B
The product will smell of roses.
с
The product will have a lemon-rose smell.
OD
It is impossible to predict the smell of the product.
Answer:
f
Explanation:
fywuiw but I you to the t
Answer:
c
Explanation:
PLS HELP
A student takes some cold water in a beaker and dissolves two tablespoons of salt in it. When the student adds one more tablespoon of salt it gets settled at the bottom of the beaker. The student warms the water and observes that the salt disappears. What can be the reason for this observation?
Heat increases the solubility of water
Heat evaporates the excess salt in solution
After heating the solution become saturated
Two table spoon of salt makes the solution unsaturated
Answer:
A
Explanation:
How many molecules are in 1.2 L of CH4 at STP?
Answer: 4.48L of CH4 at STP is equal to 1.2×10^23 molecules
Explanation:
(chem) which is more concentrated: 45.0 grams of HCOOH dissolved in 189 mL of water or 1.5 moles of CH↓2COOH dissolved in twice as much water?
Answer:
CH3COOH would be more concentrated
Explanation:
The higher the concentration value, the more concentrated it is.
The relationship between concentration, moles and volume is given by the equation;
Concentration = No of moles / Volume
5.0 grams of HCOOH dissolved in 189 mL of water
Number of moles = Mass / Molar mass = 5 / 46.03 = 0.1086 mol
Concentration = 0.1086 / 0.189 = 0.5746 mol/L
1.5 moles of CH3COOH dissolved in twice as much water
Volume = 2 * 189 = 378 ml = 0.378 L
Concentration = 1.5 / 0.378 = 3.9683 mol/L
Comparing both concentration values;
CH3COOH would be more concentrated
is heating an aluminum pan a chemical or physical reaction
Answer: chemical
Explanation: whenever heat is applied, it indicates a chemical change
A truck was carrying a substance tank. The molecules of that substance were moving away from each other. The molecules truck parked overnight in a place where energy tranferred out of the substance. In the morning, the substance was a gas. How were the molecules moving in the morning? Explain why the molecules were moving that way after the energy was tranferred out of them.
Answer:
Molecules of matter such as liquid, gas and solid still move even if the energy is transferred because it isn't a hundred percent. There is still energy and the time it took to transfer that said energy would have changed its state of matter.
Explanation:
Solid -the molecules are tight together. (touching)
Liquid - the molecules are close but not touching about mid way(not to far not to close)
Gas- the molecules in gasses are far apart.
It almost always goes from solid to liquid to gas. but in extreme conditions it could be different.
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What is an Oxidizing Agent? ( answer in simple language)
Answer:
an agent that helps accept electrons on others like oxygen, halogens
Explanation:
a substance that tends to bring about oxidation by being reduced and gaining electrons.
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What is the mass of 5.80 × 10²³ atoms of silver (Ag)?
A. 0.00893 g
B. 0.00963 g
C. 104 g
D. 112 g
Answer:
104 g
Explanation:
i just solved it
The mass of the Atom is determined mainly by the
a) mass of the neutrons
b) mass of the neutrons and protons
c) mass of the electrons
d) mass of the electrons and neutrons
Answer:
B.mass of the neutrons and protons
Explanation:
hope it's help..
menciona tres ejemplos en los que un cálculo incorrecto en los en ingredientes indispensables para la elaboración de un producto traería consecuencias graves químicamente hablando
Explanation:
Cada producto o servicio, independientemente de su propósito, debe ser seguro de usar y desarrollado de acuerdo con los más altos estándares de calidad y seguridad.
Algunos ejemplos de cálculo incorrecto de ingredientes que tendrían graves consecuencias químicas podrían ser:
Medicamentos y vacunas: Este es quizás uno de los ejemplos que tendría las consecuencias más graves para las personas si hubiera un cálculo incorrecto de ingredientes, ya que la producción de medicamentos y vacunas es una industria que requiere la máxima calidad agregada debido a que se ocupa directamente de la salud y los errores de formulación pueden agravar la enfermedad y causar la muerte. Actualmente tenemos el ejemplo de la vacuna para el control de la pandemia, que antes de ser aprobada tuvo que someterse a una serie de investigaciones, pruebas en humanos y diferentes fases para demostrar su efectividad y no causar daño al organismo humano.
Cosméticos: Existen cosméticos de la industria de la belleza que tienen la función de prevenir el envejecimiento cutáneo, alisar el cabello, etc. Por tanto, un cálculo incorrecto de los ingredientes químicos también podría provocar daños irreversibles a la salud, como quemaduras en la piel, caída del cabello, alergias, cáncer, etc.
Alimentos: La industria alimentaria utiliza componentes químicos con el fin de conservar los productos y aumentar la vida útil, por lo que si se usan en cantidades mayores de las necesarias, dichos compuestos pueden causar enfermedades en las personas como intoxicación alimentaria, cáncer, gastritis, etc.
I NEED HELP ON THIS SCIENCE QUESTION
True or False. Physical changes result in the formation of a new substance.
True or False. A major clue to a chemical change is the formation of a new
substance.
Answer:
1. false
2. true
Explanation:
I hope this helps
The actual brightness of a supergiant is more than the actual brightness of our sun. Explain why this
A supergiant is the largest star in space, so it is the brightest,
A supergiant is made up of different gases than our sun, so it is brighter,
A supergiant appears brighter than our sun, but our sun is actually brighter,
A supergiant is more powerful than our sun, so it gives off more light energy,
AMSWER:
B. I'm sorry if this is wrong
Explanation:
what is an acid base indicator
Answer:
Acid-base indicators are generally weak proteolytic that change color in solution according to the pH. The acid-base equilibrium of a weak acid type of indicator (HI) in water can be represented as. [I] The acid, HI, and the conjugate base, I−, have different colors. The equilibrium expression for this process is.
How many electrons will aluminum gain or lose in forming an ion?
Answer:
It would tend to gain one electron and form a -1 ion. Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. It would tend to lose three electrons and form a +3 ion.
Explanation:
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Aluminum (Al) is an element with atomic number 13, which means it has 13 protons and 13 electrons in its neutral state.
How does aluminum form ionWhen forming an ion, aluminum tends to lose three electrons. This is because aluminum belongs to Group 13 in the periodic table, also known as the "boron group" or "Group IIIA."
Elements in this group have three valence electrons in their outermost energy level. To achieve a stable electron configuration, aluminum can lose these three valence electrons, leaving behind a complete inner electron shell and forming a 3+ cation.
So, when aluminum forms an ion, it loses three electrons to become Al3+.
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please help with stoichiometry!
Answer:
I don't know sorry
Explanation:
ask tutor
12. The molar mass of water is 18.0
g/mol. A mass of 90.0 grams of
water is equivalent to how many
moles?
HELP ASAP!!!
Answer:
5moles
Explanation:
number of moles=mass/molar mass
The molar mass of water is 18.0 g/mol. A mass of 90.0 grams of water is equivalent to 5 moles. Therefore, option B is correct.
What is molar mass ?The mass in grams of one mole of a substance is defined as its molar mass. Molar mass is measured in grams per mole, abbreviated as g/mol. The isotopic atomic mass of a single isotope of any given element is a value that compares the mass of that isotope to the mass of the isotope carbon-12.
A compound's molar mass can be calculated by adding the standard atomic masses (in g/mol) of its constituent atoms.
A compound's molar mass indicates the mass of one mole of that substance. In other words, it tells you how many grams of a compound there are per mole. As a result, the units for molar mass are grams/mole.
number of moles = mass / molar mas
= 90.0 grams / 18.0grams
= 5 moles
Thus, option B is correct.
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hi help plz .........
Answer:The answer is C) The total mass of C and D only.
HELPP ILL GUVE YOU LOTS OF POINTS EVERYTHING U WANT I REALLY NEED HELP
Answer:
finally found
31th July 2000
What structural formula represents 4 electrons shared between two atoms?
O 0=0
O Sg
ONEN
OP4
plsss helpp ASAP
BRAINLIEST
Answer:
Specific heat is defined by the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C). Water has a high specific heat capacity which we'll refer to as simply "heat capacity", meaning it takes more energy to increase the temperature of water compared to other substances.
Explanation:
ANSWER FAST
is water wet?
a.) yes
b.) no
c.) a baby goat is a kid
Answer:
c
Explanation:
There are ___________ of different kinds of proteins in the human body?
Answer:
In humans, up to ten different proteins can be traced to a single gene. Proteome: It is now estimated that the human body contains between 80,000 and 400,000 proteins. However, they aren't all produced by all the body's cells at any given time. Cells have different proteomes depending on their cell type.
Explanation:
Proteins are macromolecules that are complex structures made of monomeric units. There are 20,000 - 60,000 different kinds of proteins in the human body.
What are proteins?Proteins have been the large molecules (macromolecules) that are structurally composed of the monomers or the smaller units. They have been composed of amino acids.
The amino acids are produced by the translational process and are linked by the peptide bonds. They are the most essential compound for the cellular and physical activity of the cells in living organisms.
The proteome is used to identify and classify the various proteins that can range from 20,000 - 60,000 in a human body. These proteins are involved in performing the functions in the body.
Therefore, approximately 20,000 - 60,000 proteins are found in the human body.
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How many grams are there in 4.50 moles of Na2SO4?
What is the volume of 13.20 grams of N2 at STP?
Here...........................
The triple point of water occurs at a pressure of 4.59 mmHg.
What is the pressure in atm?
Answer:
The pressure in atm is 6.04 x 10^-3
Explanation:
Pressure of the gas is defined as the force exerted by the particles on the walls of the container. It is expressed in various terms like 'mmHg', 'atm', 'kiloPascals' etc..
All these units of pressure are inter convertible.
Pressure of the gas = 4.59 mm Hg
760 mm Hg = 1 atm
4.59 mm Hg= 1/760 x 4.59 = 6.04 x 10^-3atm
The pressure in atm is 6.04 x 10^-3
salat tarawih itu boleh dilakukan di masjis
HELP!! When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: carbon dioxide, nitrogen, nitrogen monoxide, and water vapor. If 239g of nitroglycerin explodes, what volume of water vapor will be produced at 45.00 inHg and 2678C?
Answer:
Carbon monoxide, and water vapor was analyzed and found to contain 4.5 mol of carbon dioxide, 4.0 mol of carbon monoxide and 1.5 mole of water vapor. ... An ideal gas sample weighing 0.548 g at 100°C and 0.993 atm has a volume of 0.237 ... VSEPR predicts that an IF5 molecule
Explanation:
The volume of the nitroglycerin exploded can be calculated using the ideal gas equation. Here, the number of moles of water vapor formed is 10.5 moles. Then, the volume is 43807 L.
What is ideal gas equation ?Ideal gas equation connects the pressure, temperature and volume of a gas with its number of moles as written in the expression below:
PV = nRT.
where R = 0.082 L atm /K mol
One mole of nitroglycerin produces 10 moles of water. Then, 239 g or 1.05 moles produces 10.5 moles of water vapor.
Given,
P = 45 mmHg = 0.05 atm
T = 2678°C = 2951 K
n = 10.5
The volume of water vapor is calculated as follows:
V = nRT/P
= (10.5 mol × 0.082 L atm/K mol ×2951 K)/0.05 atm
= 43807 L.
Therefore, the volume of water vapor produced is 43807 L.
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help " anyone" plz ....
Answer:
letter A. i hope this is correct answer
Why do we feel the heat from the sun even though it is far away from Earth?
O The sun is farther away from Earth than any other star.
The sun is closer to Earth than any other star.
O The sun is the largest star.
O The sun is the brightest star.
Answer:
B.) The sun is closer to Earth than any other star.