Answer:
has a magnetic field surrounding it
Explanation:
When 33 g of CaO and 10 g of H2O react, how many grams of calcium hydroxide would you expect to be produced* Explain your answer.
Answer:
Calculate the number of moles of oxygen required to react exactly with 4.30 ... How many moles of NH3 can be made from 2.00 moles of Nz if you have excess Hz? ... 10. How many grams of water are made when 3.00 moles of butanol is combusted? ... If 50.0 g of calcium oxide were produced, how many grams of calcium ...
Answer:
41.44 g
Explanation:
First of all, we must put down the equation of the reaction;
[tex]CaO + H2O ----->Ca(OH)2[/tex]
Number of moles of CaO = 33g/56 g/mol = 0.59 moles
Number of moles of H20 = 10g/18 g/mol = 0.56 moles
Since the reaction is in 1:1 mole ration, H2O is the limiting reactant
Hence;
mass of Ca(OH)2 produced = 0.56 moles * 74 g/mol = 41.44 g
The volume of water in a graduated cylinder was increased from 52.0 mL to 75.5 mL when a piece of irregular metal was placed in the water. If the piece of metal has a mass of 265.6 g, what is the density of the metal?
Answer:
11.30 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
volume = final volume of water - initial volume of water
volume = 75.5 - 52 = 23.5
From the question we have
[tex]density = \frac{265.6}{23.5} \\ = 11.302127...[/tex]
We have the final answer as
11.30 g/mLHope this helps you
Answer:
Approximately 11.3 g/mL
Explanation:
The formula for density is mass divided by density. In this problem, the mass is already given: 265.6 grams. The density is the part with the milliliters. 75.5 mL - 52.0 mL is 23.5 mL.
After plugging these numbers into the formula, you get 265.6 g/23.5 mL. After divided those numbers, you get 11.30212..... g/mL, which rounds to 11.30 g/mL.
I hope this helps!
2. After class, Claudia had a snack. Then, she drove home and settled down to relax, surrounded by candlelight. What types of combustion do Claudia’s various activities represent?
Answer:
The types of combustion are;
1) Claudia eating snack is slow combustion
2) Claudia driving home involves explosive combustion
3) The lit candle is a form of rapid combustion
Explanation:
Combustion is the rapid exothermic chemical reaction between a fuel and an oxygen source to produce oxidized compounds formed from the elements in the compounds present in the fuel, which when combined together in a mixture are known as smoke
The types of combustion are;
1) Digestion of the snack is the slow combustion of glucose
2) Combustion in the engine of the car is a form of explosive combustion
3) The burning of the candle is a form of rapid combustion
Which option identifies why Tony does NOT purchase the strawberries in the following scenario?
Tony checks the Country of Origin label before purchasing organic strawberries and decides against buying them when he sees they
came from Chile.
He is not sure the strawberries are organically grown
O He does not believe the strawberries are fresh.
He only purchases strawberries grown locally
He is not sure of the strawberries' nutritional content
Answer:
He only purchases strawberries grown locally.
Explanation:
Based on the information we are given, this is the only reasonable answer.
Answer :He only purchases strawberries grown locally.
Explanation: The correct answer is He only purchases strawberries grown locally. Many consumers have preferences as to where their food comes from. Some want to avoid products that have been shipped extensively and prefer to purchase locally produced goods and services. Country of Origin labeling does not indicate whether a product is organic, its nutritional content, or whether it is fresh, and a consumer would need to determine this information another way.
1s^22s^2 shows the configuration of which subatomic particles?
A. Atoms
B. Electrons
C. Neutrons
D. Protons
please help does anybody know how to calculate the molar mass of a compound?
PLEASE HELP
WILL GIVE BRAINLIEST
If 175.0g of nitrogen is reacted with 250.0g of hydrogen, what is the theoretical yield of the reaction? What is the excess reactant? What is the limiting reactant? Show your work.
Answer:
Nitrogen gas is the limiting reactant
Hydrogen gas is the excess reactant
The theoretical yield is 425 g of ammonia
Explanation:
Equation of reaction: 3H2 + N2 ---> 2NH3
From the equation of reaction, 3 moles of hydrogen gas reacts with 1 mole of nitrogen to produce 2 moles of ammonia gas.
Molar mass of hydrogen gas = 2.0 g
Molar mass of nitrogen gas = 14.0 g
Molar mass of ammonia gas = 17.0 g
Number of moles of hydrogen gas in 250 g = 250/2 = 125 moles
Number of moles of nitrogen gas in 175 g = 175/14 = 12.5 moles
Mole ratio of Hydrogen to Oxygen = 125/12.5 = 10 : 1
Therefore, nitrogen gas is the limiting reactant.
Hydrogen gas is the excess reactant
14 g of nitrogen gas produces 17 × 2 g of ammonia = 34 g of ammonia
175 g will produce (34 × 175)/14 = 425 g of ammonia
Therefore the theoretical yield is 425 g of ammonia
what would be the theoretical yield of 2SO2 + O2 + 2H2O --> 2H2SO4
Answer:
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Explanation:
Which model is based on Bohr's quantum model?
Model A
Model B
Model C
Model D
Answer:
Model D
Explanation:
Bohr's Model has a planetary look. Where the electrons are in an orbit.
Answer:
The answer is model D
Genesis lays an object on the table in a well-lighted room the object absorbs all visible light waves what color object does genesis see?
Answer:
The object Genesis sees is black.
Explanation:
The color an object reflects represents what the object's color is. For example, if a block reflects blue light, then only blue light is sent to our eyes, and hence we see the block as blue.
If an object absorbs all visible light waves, then, that means there's no visible light reflected, and we cannot see any color the object has. Hence, it is black in our eyes.
Hope this helped!
How many molecules are in 45.0 grams of NaCl
Answer:
3.5*10^23
Explanation:
divide 45/molar mass
then multiple the answer to Avogadro's number
Answer:
10/13 × 6.022×10²³
Explanation:
ans: given mass / molar mass = number of moles
(M ).
number of moles(M) = number of molecules / avagadro number ...
=molar mass of NaCl = 58.5 gram
45/58.5 × 6.022 ×10²³
= 10/13 × 6.022 × 10²³ is the required number
What is the wavelength of a wave having a frequency of 3.23 x 1014 sl?
The wavelength=9.29 x 10⁵ m
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸
λ = wavelength
a frequency of 3.23 x 10¹⁴/s
the wavelength :
[tex]\tt \lambda=\dfrac{c}{f}=\dfrac{3\times 10^8}{3.23\times 10^{14}}=9.29\times 10^5~m[/tex]
11. Do the blue dots on the graph represent an object that
sinks or floats in the water? How do you
know?
a. Floats because the blue dots are all
above the line with a slope of 1 g/mL.
b. Floats because the blue dots are all
below the line with a slope of 1 g/mL.
c. Sinks because the blue dots are all above
the line with a slope of 1 g/mL.
d. Sinks because the blue dots are all below
the line with a slope of 1 g/mL.
Identify three reasons why
plate tectonics can be described as the surface expression of the
cycling of matter due to the flow of energy via mantle convection.
The three reasons why plate tectonics can be described as the surface expression of mantle convection are;
1) It involves the outer shell which is the surface of the earth.
2) It involves movement of of rocks at the the surface which can be likened to mantle convection.
3) It involves transfer of heat as in mantle convection but at the surface.
Mantle convection is simply defined as transport of the solid bulk of the earths' interior known as mantle by the transfer of heat from the earth's white hot core which is its' deep interior to the surface known as lithosphere which causes the motion of Earth's mantle to solidly creep.Now, plate tectonics are defined as the theory that explains the past and present movements of the rocks situated at the surface of the earth which aids in understanding the geological history of the rocks. This means it is basically the outer shell of the earth that is being divided into large plates that move smoothly over the earths' mantle but above the earths' core.Read more at; https://brainly.com/question/19990159
23) Assuming STP, how many moles are in 30 L SO2?
Answer:
1.34 moles SO₂(g)
Explanation:
At STP 1 mole of any gas occupies 22.4 Liters. So, for 30 Liters ...
moles SO₂(g) = 30L/22.4L·mol⁻¹ = 1.34 moles SO₂(g)
(a) A mixture of milk and water can be separated by filtration.
and by which method
Answer:
Distillation
Explanation:
Distillation is the process of separating the components of a liquid by using the method of selective boiling and condensation.
Since the components of the liquid have different boiling points, they would evaporate at different temperatures, thus causing the separation to occur.
So, distillation can be used to separate a mixture of milk and water.
When an oxygen-19 nucleus undergoes beta decay, the nucleus formed is
that of
oxygen-18.
O nitrogen-18.
fluorine-19.
O carbon-14.
a speed-time graph which the displayed data forms a straight line is a example of?
Answer:
constant speed or a horizontal line is an rest
Explanation:
help help help pls pls pls
Explanation:
Aluminium and Chlorine.
Al and Cl2.
Which of the following biogeochemical cycles uses the reaction 2N2 + 6H20 --> 4NH3 + 302? (3 points)
The nitrogen cycle
The carbon cycle
The water cycle
The phosphorus cycle
Answer:
phosphorus cycle
Explanation:
the phosphorus cycle because 302 equals to it
What causes objects to speed up, slow down, and change directions?
What are gases that are molecules
Answer:
there are elemental molecules, made from one type of atom (pure), example: oxygen and there are compound molecules, made from more then one type of atom, for example carbon dioxide
Which of the following is true for a cell that has DNA present inside a nucleus? (5 points)
It must be a part of the oldest known fossils.
It must be a part of a eukaryote.
It must be a part of a bacterium.
It has a nucleoid.
I REALLY NEED THIS RIGHT NOW IF YOU SEE THIS AND NOW THIS PLEAASE HELPPP
Answer:
It must be a part of a eukaryote
Explanation:
Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell's DNA and directs the synthesis of proteins and ribosomes.
what contribution to atomic theory resulted from albert einstein’s work?
Answer:
Albert Einstein is perhaps most famous for introducing the world to the equation E=mc2. In essence, he discovered that energy and mass are interchangeable, setting the stage for nuclear power—and atomic weapons. His part in the drama of nuclear war may have ended there if not for a simple refrigerator.
Explanation:
Albert Einstein is perhaps most famous for introducing the world to the equation E=mc2. In essence, he discovered that energy and mass are interchangeable, setting the stage for nuclear power—and atomic weapons. His part in the drama of nuclear war may have ended there if not for a simple refrigerator.
The contribution to atomic theory resulting from Albert Einstein's work is A new understanding that the nucleus contains protons and neutrons.
Albert Einstein's work contributed to the development of the theory of relativity, which had profound implications for our understanding of the structure of atoms. Through his work, it became clear that the nucleus of an atom contains positively charged protons and electrically neutral neutrons. This understanding of the composition of the atomic nucleus was a significant advancement in atomic theory.
While Albert Einstein made significant contributions to physics and our understanding of the universe, the specific discoveries mentioned in the other answer choices were made by other scientists and not directly attributed to Einstein.
Hence, the correct option is option b.
Learn more about atomic theory here:
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#SPJ 4
What classifies something as a chemical reaction?
Answer:
changes that change the matter of the object and made it into another object
Explanation:
HELP ME ASAP
Samantha and Claire determined the mass and volume of a piece of metal to be 24.16 g and 3.22 mL respectively. Determine the density of the metal.
Answer:
7.5031055900621
Explanation:
D= M/V
A student has 0.75 L of a 5.0 M solution and dilutes it to make 3.5 liters. What’s the molarity of the diluted solution?
1.1 M
2.0 M
1.6 M
.93 M
The molarity of the diluted solution : 1.1 M
Further explanationDilution is the process of adding solvent to get a more dilute solution.
The moles(n) before and after dilution are the same.
Can be formulated :
[tex]\tt n_1=n_2\\\\M_1.V_1=M_2.V_2[/tex]
M₁ = Molarity of the solution before dilution
V₁ = volume of the solution before dilution
M₂ = Molarity of the solution after dilution
V₂ = Molarity volume of the solution after dilution
M₁=5
V₁=0.75
V₂=3.5
[tex]\tt M_2=\dfrac{M_1.V_1}{V_2}\\\\M_2=\dfrac{5\times 0.75}{3.5}\\\\M_2=1.07\approx 1.1[/tex]
How are crystals made?
Explanation:
Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.
Answer: Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.
Explanation: Can i have BrainLiest
Which is demonstrated by the steps shown in the flow chart?
what is the meaning of seasons ?