Which of the following corresponds to an alpha particle?
A. 1/4He
B. 3/2He
C. 2/2H
D. 4/2He
Answer:
D. 4/2 He corresponds to an alpha particle.
Please help I’m so lost!! Chemistry
Answer:
i will help you
Explanation:
if the reactions have more energy than the products this means that there is some energy that given outside and this reaction will called an exothermic reaction.
But if the reaction have less energy than the products this means that there is some energy that taken from outside and this reaction is called an endothermic reaction.
What happened a when you try to layer a more-dense solution on top of a less-dense solution
Answer:
the more dense solution will sink to the bottom the less dense solution will go to the top
Answer:
Explanation:The density of a liquid determines whether it will float on or sink in another liquid. A liquid will float if it is less dense than the liquid it is placed in. A liquid will sink if it is more dense than the liquid it is placed in.
Density of a liquid determines how it will layer (heaviest to lightest). If the liquid us least dense it float to the bottom. Layers will remain separated because each liquid is actually floating on top of the more dense liquid beneath it.
Aanlyze the potential energy diagram of the
reaction shown.
Which statements about the reaction are true?
Select all that apply.
The reaction is exothermic
The reaction is endothermic
The equation shows that 891 kJ of energy are
released as a product.
The equation shows that 891 kJ of energy are
absorbed as a reactant.
The graph shows that the reactants have greater potential energy than the products.
The answer is a,c,e
Answer:
A: The reaction is exothermic
C: The equation shows that 891 kJ of energy are released as a product.
E: The graph shows that the reactants have greater potential energy than the products.
Explanation:
The statement about the reaction is true:
A: The reaction is exothermic
C: The equation shows that 891 kJ of energy is released as a product.
E: The graph shows that the reactants have greater potential energy than the products.
What is potential energy?Potential energy is the energy that is saved in the body. It is used in the work and when convert into kinetic energy.
A moving item fundamentally possesses kinetic energy. Kinetic energy would therefore be created as a result of an object moving or an elastic band being released since the released object exhibits motion.
Therefore, the correct option is A: The reaction is exothermic, C: The equation shows that 891 kJ of energy is released as a product, and E: The graph shows that the reactants have greater potential energy than the products.
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Composition analysis of a mixture of CaCl2 and NaCl was carried by dissolved 2.500 g of powder in distilled water and make up to 250.0 cm3 in a volumetric flask. 25.00 mL sample solution was titrated against with 0.170 M of AgNO3 solution. The volume of AgNO3 solution required was 26.00 mL, a) Calculate the concentration of Cl- ion in the sample solution in M and % w/v
Answer:
correct answer is 75
Explanation:
here is your answer hope you will enjoy and mark me as brainlist
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How does the Earth move within the Milky Way?
Answer:
The answer is in the explanation
(PLS VOTE ME AS BRAINLIEST!!!!!!!!!!!!!)
Explanation:
As Earth rotates on its axis, it orbits the sun, which orbits the center of the Milky Way, which itself is barreling through space.
element Q,X, and Z are in the same group on the periodic table and are listed in order of increasing atomic number.The melting point of element Q is -219 Celsius and the melting point of element Z is -7 celsius. Which temperature is closest to the melting point of element X
Answer:
Very low ionization energy: metal bonds easily: group 1, or maybe 2 low melting.
Explanation:
Identify the reactant that gets oxidized in the following reaction.
2 AgNO₃(aq) + CaI₂(aq) → 2 AgI(s) + Ca(NO₃)₂(aq)
A) Ag in AgNO₃
B) I in CaI₂
C) N in AgNO₃
D) Ca in CaI₂
E) This is not an oxidation/reduction type of reaction
Answer:
E) This is not an Oxidation/ Reduction type of reaction
Explanation:
Oxidation involves the loss of electrons while reduction involves the addition of electrons. None of the elements change their oxidation number in the reaction, so this is not an oxidation/reduction type of reaction.
The addition of oxygen and the removal is electrons is called oxidation. In a reaction that has both the process is called the redox reactions.
The correct answer to the question is option E
In this reaction, not any elements have the loose and gain the electrons in order to tell the oxidation and reduction.
This reaction is a neutralization reaction.
Hence, the correct answer is E that is not an oxidation/reduction type of reaction.
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what i compound is
FeI2
Answer:
iodide
Explanation:
Answer:
Iron(II) iodide
Explanation:
What is the mass/volume percent of a solution containing 32.6g of CaCl2 in 375mL of water?
what is the functional group and homologous series of ethyl butyrate?
Answer:
Functional group: ROR'
Homologous series: ester [C6H12O2]
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If 0.600mol of chloride gas reacted with 0.500mol of aluminium metal to produce aluminium chloride,which reactant is in excess?how many moles of aluminium chloride can be produced during the reaction.
Answer:
The balanced chemical equation: 2 Al + 3Cl2→ 2 AlCl3
Mole-mole relationship: 2 moles Al + 3 moles Cl2→ 2 moles AlCl3
Given: 0.600 moleCl2; 0.500 mole Al
Required: Excess reactant___; Number of moles of AlCl3 produced__
Solution: Use dimensional analysis using the mole-mole rel
0.600 mole Cl2 * 2 moles Al/3 moles Cl2 = 0.4 mole Al
0.5 mole Al* 3 moles Cl2/2 moles Al = 0.75 mole Cl2
Based on the given:
0.6mole Cl2 + 0.4 mole Al ( this is possible based on the given)
0.5mole Al + 0.75 mole Cl2 (this is not possible because the given is only 0.600 mole of Cl 2)
Answer: Excess reactant is Al; Limiting reactant is Cl2
The amount of AlCl3 produced = 0.6 mole Cl2 + 0.4 mole Al = 1.0 mole AlCl3
Write the equation that represents what happens when barium hydroxide dissolves in water. You do not need to include water as a reactant in the equation.
Barium hydroxide dissolves in water according to the equation: [tex]Ba (OH)_2 (aq) ---> Ba^2^+(aq) + 2OH^-(aq)[/tex]
When barium hydroxide is dissolved in water, it dissociates into its component ions completely. In other words, barium hydroxide dissociates into barium and hydroxyl ions just like every other strong base.
The equation for the dissociation in water is as follows:
[tex]Ba (OH)_2 (aq) ---> Ba^2^+(aq) + 2OH^-(aq)[/tex]
More on barium hydroxide can be found here: https://brainly.com/question/10094403
Answer:
Ba(OH)2 (s) --> Ba2+ (aq) + 2OH- (aq)
Explanation:
Barium hydroxide is a solid before it dissolves in water, and then becomes an aqueous solution during the reaction.
in metallurgy hydrogen reduce metal oxides to
Answer:
Considering the above series we can say that hydrogen can reduce only oxides of copper, mercury, silver and gold as these metals are less reactive than hydrogen.
which best describes how heat energy moves within the system?
Answer: B
Heat always travels from warmer areas to cooler areas in the form of radiation or convection currents due to the temperature difference. You could kind of think of this movement like diffusion: travelling from a higher concentration to a lower one (if you take biology). This is how a gas heats up a pan on the stove or a radiator warms a room
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Mixture of a 25.00 mL aliquot of the sample solution with 5.00 mL of a 0.250 ppm warfarin standard yielded a solution with an intensity of 670. Calculate the percentage of warfarin in the sample.
Answer:
750
Explanation:
The molarity of an aqueous solution of CaCl is defined as the
Answer:
Molarity of aqueous solution of CaCl2 can be defined as moles of CaCl2 per litre of solution
Which two characteristics determine the strength of the gravitational force
between two objects?
A. The distance between the objects' centers
B. The distance between the objects' surfaces
C. The amount of matter in the objects
D. The total volume of the objects
Answer:
A and C
Explanation:
I took the test
The distance between the objects' centers and The amount of matter in the objects are two characteristics determine the strength of the gravitational force between two objects.
What is Gravitational force?All objects with mass or energy are attracted to one another by gravity, which is a fundamental interaction.
The electromagnetic force, the weak interaction, and the strong interaction are all significantly stronger than gravity, which is by far the weakest of the four fundamental interactions.
As a result, it has no appreciable impact on subatomic particle level phenomena. However, at the macroscopic level, gravity is the most important interaction between objects and governs the motion of planets, stars, galaxies, and even light.
Therefore, The distance between the objects' centers and The amount of matter in the objects are two characteristics determine the strength of the gravitational force between two objects.
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You are given a water-soluble compound X. Describe how you would determine whether it is an electrolyte or a nonelectrolyte. If it is an electrolyte, how would you determine whether it is strong or weak?
If the compound contains a metal cation or an ammonium cation, then the compound is ionic. Otherwise it is a molecular compound. Ionic compounds that dissociate completely in water are strong electrolytes. ... Molecular compounds that are weak acids are weak electrolytes.
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An electrolyte substances which, when dissolved in aqueous solution, dissociates into cations (+ ions) and anions (- ions).
Electrolytes can either be a weak or strong electrolyte depending on whether they can dissociate partially or completely.
Therefore, regarding the water-soluble compound X:
it is an electrolyte if it dissociates into its respective ions in an aqueous solutionThe compound is a weak or strong electrolyte depending on whether it dissociates partially or completely.Learn more about electrolytes at: https://brainly.com/question/14566383
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A \pu{1.60 g}1.60 g1, point, 60, space, g calcium supplement contains 37.8\%37.8%37, point, 8, percent \ce{Ca}CaC, a by mass. The calcium is present in the supplement as \ce{CaCO3}(s)CaCOX 3 (s) (molar mass \pu{100.09 g/mol}100.09 g/mol100, point, 09, space, g, slash, m, o, l). How many grams of \ce{CaCO3}(s)CaCOX 3 (s) are in the calcium supplement?
A 1.60 g calcium supplement that contains 37.8% Ca by mass, contains 1.51 g of CaCO₃.
We want to calculate the mass of CaCO₃ in a 1.60 g supplement. We need to consider the following relationships.
The mass percent of Ca is 37.8%, that is, there are 37.8 g of Ca every 100 g of supplement.The molar mass of Ca is 40.08 g/mol.The molar ratio of Ca to CaCO₃ is 1:1.The molar mass of CaCO₃ is 100.09 g/mol.[tex]1.60gSup \times \frac{37.8gCa}{100gSup} \times \frac{1molCa}{40.08gCa} \times \frac{1molCaCO_3}{1molCa} \times \frac{100.09gCaCO_3}{1molCaCO_3} = 1.51gCaCO_3[/tex]
A 1.60 g calcium supplement that contains 37.8% Ca by mass, contains 1.51 g of CaCO₃.
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A 1.60 g calcium supplement contains 37.8% Ca by mass. The calcium is present in the supplement as CaCO₃(s) (molar mass 100.09 g/mol). How many grams of CaCO₃(s) are in the calcium supplement?
Convert 21 grams of radon into atoms of radon.
Answer:
The atomic mass of radon is 222.
Explanation:
. That means that one mole of radon weighs 222 grams (222 grams/moles). We can therefore make the following equation:
Grams × (1/222) = Moles of Radon
In order to complete a reaction, a chemist needs to react 4 moles of aluminum atoms with 3 moles of oxygen molecules. How many grams of aluminum would be required to make this happen?
Answer:
4 Al + 3 O2 → 2 Al2O3
To react with 4 moles of Al, (3×32) g oxygen is required.
So, to react with 2.4 moles of Al, {(3×32)/4} × 2.4 = 57.6 g oxygen is required.
Hope this helps.
PLEASE HELP IM FINNA GIVE POINTS AND BRAINLIEST ASSAPPPP
Answer:
it isn't clear for viewing
Why are coal, oil and natural gas called fossil fuels
i’m sooo confused please help
Answer:
I don't know if this will really help you but I'll try to explain it
Explanation:
it wants you tell some things you see on the graph. Some examples you can say is what kind of bond it is and things like that. You can use a periodic table
The electron configuration of an element is shown below.
1s22s22p63s23p6
Name the group this element belongs to in the periodic table and explain your answer.
Based on the electron configuration, write one chemical property of this element.
The element belongs to group 18 and the element is chemically inert.
What is electron configuration?The term electron configuration refers to the arrangement of electrons in an atom. The electron configuration of an atom can show the group to which it belongs in the periodic table.
Given the configuration, 1s22s22p63s23p6 the element belongs to group 18 and the element is chemically inert.
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which of the following substances will cross the cell membrance through osomosis
Answer:Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ).
Explanation:
0°C in 101.3 K PA pressure a sample of gas occupies 30 mL if the temperature is increased to 30°C in the entire gas sample is transferred to a 20 mL container what will be the gas pressure inside a container
Answe 174.0 KPA
Explanation:
0°C in 101.3 K PA pressure a sample of gas occupies 30 mL if the temperature is increased to 30°C in the entire gas sample is transferred to a 20 mL container what will be the gas pressure inside a container
PV=nRTt
so
n = PV/RT
P = 101.3 KPA
T = 0+273.2 = 273.200
V = (30/1000) L = 0.03 L
R =0.082
SO
n= (101.3 X 0.03)/(0.082 X 273.2)
= 0.14 moles
PV= nRT
N= 0,14
T = 30 + 273.2= 303.2
V= (20/1000)L =0.02L
since PV = nRT
THEN
P=nRT/V
so
P=(0.14 X 0.082 X 303.2)/0.02 =
174.0 KPA
ARTICLE:
When Olafur Eliasson and Frederik Ottesen heard that more than 1 billion people on Earth don’t have access to electricity, they wanted to help. In many places, lack of electricity means students can’t study after dark and families can’t cook after the sun goes down. It’s also harder for doctors and nurses to treat patients without good lighting. Eliasson and Ottesen decided to invent a solar lamp that would provide light without costing a lot of money, polluting the air, or causing fires.
Their solution? The Little Sun lamp is a sun-shaped light with a light bulb on one side and a solar panel on the other. The Little Sun lamp uses energy to provide light to people who need it, but the Little Sun doesn’t make its own energy. To run, the lamp needs to get energy from somewhere else. In this case, that source of energy is the sun. The solar panel on the back of the lamp converts light energy from the sun into potential energy that can be stored in a battery and used later to make the light bulb shine. Little Sun lamps charge in the sun during the day and provide light at night, allowing people to study, cook, work, and take care of other things even after the sun sets. They’re inexpensive, don’t pollute, and don’t cause fires.
questions: 2) How does the Little Sun Lamp help people around the world get light?
3) How does the Little Sun Lamp use energy from the sun to make the light bulb shine?
Answer:
got light to charge from the sun
Explanation:
they did it so that people don't pollute the ozone layer and thats why they invent that and it help them in every way
