Answer:
alpha emission
Explanation:
Which of the following lists describes characteristics of a base? (3 points) Bitter taste, high pH, and caustic Bitter taste, low pH, and slippery Sour taste, high pH, and dissolves metals
Bitter taste, high pH, and caustic Bitter are the characteristics of base.
What are the characteristics of base?Bases have bitter taste, soapy feel, turn red litmus paper blue. Bases are substances that contain metal oxides or hydroxides. Its pH is higher than 7 up to 14.
So we can conclude that bitter taste, high pH, and caustic Bitter are the characteristics of base.
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Answer:
Bitter taste, high pH, and caustic
Explanation:
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What are some common isotopes of mercury?
Answer:
The three most stable isotopes of hydrogen: protium (A = 1), deuterium (A = 2), and tritium (A = 3).
Protium, the most common isotope of hydrogen, consists of one proton and one electron. ...
A deuterium atom contains one proton, one neutron, and one electron.
Explanation:
Consider the southeast coast of north america and the northwest coast of africa. According to the current theory of plate tectonics, these two regions were once very close together. However, the coasts do not quite fit together like puzzle pieces, as one might expect. This can be explained by the fact that the southeast edge of north america's ________ actually does fit nicely with the northwest edge of africa's __________ even if the coasts do not
Answer:
Both are continental shelf's.
Explanation:
A continental shelf is the shallow underwater extension of land surrounding a continent. It makes up the edge of a landmass, even though it is under water. At some points in the Earth's past, many underwater continental shelves were once a part of dry land.
Explain in terms of atomic structure why barium has lower first ionization energy than magnesium
Answer:
Barium is lower in group 2 than magnesium, so number of shells increase. The valence electron is further from the nucleus making it easier to lose electrons.
Explanation:
Barium has more electrons shells than calcium, so the nuclear shielding is stronger, and the outmost electrons are further away from the nucleus. This results in a weaker attractive force between the electron and the nucleus, so a smaller energy is required to remove it.
Answer:
Barium has a greater radius than magnesium
Explanation:
Barium and magnesium are two elements which belong to the same group, group 2A. This means that the two elements have two valence electrons in their outer shell.
The difference is, however, since barium
is lower in group than magnesium, it has
more electron shells than magnesium and,
therefore, its radlus is greater. The attraction
force between the nucleus and the valence
electrons in barium is lower as a result, as force
is inversely proportional to distance. Hence, a
lower amount of energy is required to remove
the valence electrons from barium.
Explanation:
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True or false, Atoms with 5 to 8 electrons want to "donate" or get rid of them.
Thank you!
Which represents the correct equilibrium constant expression for the reaction below? upper c u (s) plus 2 upper a g superscript plus (a q) double-headed arrow upper c u superscript 2 plus (a q) plus 2 upper a g (s). k e q equals startfraction startbracket upper c u endbracket startbracket upper a g superscript plus endbracket superscript 2 over startbracket upper c us superscript 2 plus endbracket startbracket upper a g endbracket superscript 2 endfraction. k e q equals startfraction startbracket upper c u superscript 2 plus endbracket startbracket upper a g endbracket superscript 2 over startbracket upper c u endbracket startbracket upper a g superscript plus endbracket superscript 2 endfraction. k e q equals startfraction startbracket upper a g superscript plus endbracket superscript 2 over startbracket upper c u superscript 2 plus endbracket endfraction. k e q equals startfraction startbracket upper c u superscript 2 plus endbracket over startbracket upper a g superscript plus endbracket superscript 2 endfraction.
The correct equilibrium constant expression for the given chemical reaction is Keq = [Cu²⁺] / [Ag⁺]².
What is equilibrium constant?Equilibrium constant of any reaction at the equilibrium state will be define as the ratio of the concentration of products to the concentration of the reactants.
Given chemical reaction is:
Cu(s) + 2Ag⁺(aq) ⇄ Cu²⁺(aq) + 2Ag(s)
Equilibrium constant for the above reaction will be written as:
Keq = [Cu²⁺][Ag]² / [Cu][Ag⁺]²
But in the above reaction at the product side silver is present in pure solid form and at the reactant side copper is present in pure solid form and concentration of these elements equals to one in equilibrium state, so that equation becomes:
Keq = [Cu²⁺] / [Ag⁺]²
Hence equilibrium expression for given reaction is Keq = [Cu²⁺] / [Ag⁺]².
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Answer: D
Keq = [Cu²⁺] / [Ag⁺]²
Which statement below is true?
The mass of each planet is different, so they each orbit their own moons.
The mass all the planets together is greater than the mass of the sun.
The mass of all planets is the same, so they all orbit the Sun.
The mass of each planet is less than that of the Sun, so they all orbit the Sun.
Answer:The mass of each planet is less than that of the Sun, so they all orbit the Sun.
Explanation:
You are asked to make 500 mL of a 0. 250 M sodium chloride (NaCl) solution.
a. How many moles of NaCl would you need?
b. How many grams of NaCl would you need? (gfm = 58 g/mol)
Answer:
a. .125 mol b. 7.25g
Explanation:
a. To get the moles multiply the volume by the molarity.
.5L*.25M=.125mol NaCl
b. The molar mass is provided so multiply the moles by the molar mass to get the amount of grams of nacl.
.125mol*58molar mass=7.25g nacl to make the solution
What is the equilibrium expression for 2NO+Br2⇌2NOBr?
A.) [NO]2[Br2]/[NOBr]2
B.) [NOBr]2/[NO2][Br]2
C.) [NO2][Br]2/[NOBr2]
D.) [NOBr]2/[NO]2[Br2]
Explanation:
D mole is a power. .......
[NOBr]2/[NO]2[Br2] is the equilibrium expression for 2NO+Br2⇌2NOBr. Therefore, the correct option is option D.
What is equilibrium?When the observable qualities, such as colour, pressure, temperature, concentration, etc. do not vary, the process is said to be in equilibrium. As "balance" is the definition of the word "equilibrium," it follows because a chemical reaction reflects a balance among the substances and outcomes involved in the reaction.
In some physical processes, such as the melting of ice at 0°C, where both the two substances are present at equilibrium, the equilibrium state can also be observed. Physical equilibrium refers to the equilibrium that results from physical processes like the melting of solids. [NOBr]2/[NO]2[Br2] is the equilibrium expression for 2NO+Br2⇌2NOBr.
Therefore, the correct option is option D.
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Calculate the vapour density of a
diatomic gas X, if its relative mass is 16
From the information, the vapor density of gas X is obtained as 8. The vapor density is half of the relative molecular mass of the compound.
What is vapor density?The term vapor density is defines as half of the relative molecular mass of a compound. Now we have the relative molecular mass of the compound as 16.
It the follows that the vapor density of the compound must be 16/2. Hence, the vapor density of the diatomic gas X is 8.
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What happens to the electrons of a reducing agent during a reaction?
Electrons are doubled
Electrons are lost
Electrons are gained
Electrons are held
Answer:
A I DID THIS BEFORE
Explanation:
Why must chemical equations be balanced? (Choose all that apply.)
Two substances must make a new substance.
All atoms on both sides of an equation must be the same.
All atoms on both sides of an equation must be in equal amounts.
It is needed in order to add coefficients.
It will satisfy the law of conservation of mass.
Answer:
It will satisfy the law of conservation of mass.
Two substances must make a new substance.
All atoms on both sides of an equation must be the same.
Explanation:
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Have a blessed day !
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if 66.38 g of potassium chloride reacts with fluorine and produces potassium fluoride and chlorine how many moles of chlorine can you get?
Taking into account the reaction stoichiometry, f 66.38 g of potassium chloride reacts with fluorine and produces potassium fluoride and chlorine, 0.4452 moles of chlorine is produced.
Reaction stoichiometryIn first place, the balanced reaction is:
2 KCl + F₂ → 2 KF + Cl₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
KCl: 2 moles F₂: 1 moleKF: 2 moles Cl₂: 1 moleThe molar mass of the compounds is:
KCl: 74.55 g/mole F₂: 38 g/moleKF: 58.1 g/moleCl₂: 70.9 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
KCl: 2 moles ×74.55 g/mole= 149.1 grams F₂: 1 mole ×38 g/mole= 38 gramsKF: 2 moles ×58.1 g/mole= 116.2 gramsCl₂: 1 mole ×70.9 g/mole= 70.9 gramsMoles of Cl₂ formedThe following rule of three can be applied: if by reaction stoichiometry 149.1 grams of KCl form 1 mole of Cl₂, 66.38 grams of KCl form how many moles of Cl₂?
[tex]amount of moles of Cl_{2} =\frac{66.38 grams of KClx1 mole of Cl_{2}}{149.1 grams of KCl}[/tex]
amount of moles of Cl₂= 0.4452 moles
Then, if 66.38 g of potassium chloride reacts with fluorine and produces potassium fluoride and chlorine, 0.4452 moles of chlorine is produced.
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Give two physical properties of ionic compounds
Explanation:
Hope it helps you!!Consider the following equilibrium: upper c upper o (g) plus 2 upper h subscript 2 (g) double arrow upper c upper h subscript 3 upper o upper h (g). k subscript e q equals 26. which statement about this system is true? if the equilibrium concentration of co is 3.4 × 10–1 m, and the equilibrium concentration of h2 is 6.8 × 10–1 m, the equilibrium concentration of ch3oh is
The equilibrium concentration of CH3OH will be equal to 0.089 if the equilibrium concentration of co is 3.4 × 10–1 m, and the equilibrium concentration of h2 is 6.8 × 10–1 m
What is equilibrium concentration?An equilibrium concentration is a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction
Step 1:
The balanced equation for the reaction is given below:
H2O + Cl2O <=> 2HClO
Step 2:
Data obtained from the question. This includes:
Concentration of H2O, [H2O] = 0.077 M
Concentration of Cl2O, [Cl2O] = 0.077 M
Concentration of HClO, [HClO] = 0.023 M
Equilibrium constant, K =?
Step 3:
Determination of the equilibrium constant. This is illustrated below:
The equilibrium constant for the above reaction is given below:
K = [HClO]^2 / [H2O] [Cl2O]
K = (0.023)^2 / (0.077 x 0.077)
K = 0.089
Therefore, the equilibrium constant for the above reaction is 0.089
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One way to identify the type of radioactive decay produced in a reaction is to pass the emission through an electric field Describe the type of radioactive emission produced from the decay of uranium- 238 to thorium-234 and its reaction to the electric field
A) Radioactive gamma decay is produced by the reaction. This neutral electromagnetic radiation are not attracted to the electric field
B) Beta particles are released during the radioactive decay. These negative particles are attracted to the positive plate in the electric field.
C) During the radioactive decay, alpha particles are released. These positive particles are attracted to the negative plate in the electric field.
D) Both types of radioactive emissions, particles and electromagnetic radiation are produced during this decay. None of these are attracted to the electric field
Decay of Uranium-238 produces gamma radiaton whereas decay of thorium-234 releases beta radiation.
What type of radiation is produced?In the decay of U-238, two gamma rays of different energies are emitted in addition to the alpha particle while on the other hand, in the decay of thorium-234 , beta rays are emitted.
So we can conclude that decay of Uranium-238 produces gamma radiaton whereas decay of thorium-234 releases beta radiation.
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Answer:
Yes its
C. During the radioactive decay, alpha particles are released. These positive particles are attracted to the negative plate in the electric field.
Explanation:
Just got it right on USATP
Which of the following converts chemical energy to electrical energy? Question 2 options: Camp fire Person eating food Battery Automobile
Answer:
battery
Explanation:
the answer is C
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Which food provides more energy for your body, tortilla chips or marshmallows? How do we determine how good provides energy to our body? Explain
Answer the question PLS 100 points!!!
Now
1.36atm1.36(760)1033.6mm HgDone!
We know
[tex]\boxed{\sf 1atm=760mmHg}[/tex]
So convert now
1.36atm1.36×760mmHg136/100(760)mmHg1033.6mm HgWaves that move through matter are called waves. Waves that move through space are called waves
Answer
Electromagnetic waves.
Explanation: Waves that Move through matter only are called Mechanical waves. Waves that move through space only are called electromagnetic waves.
What is Arrhenius's definition of an acid?
a substance that dissociates in water to produce hydroxide ions (OH)
O a substance that dissociates in water to produce hydrogen ions (H+)
O any substance that can donate hydrogen ions (H+).
O
any substance that can accept hydrogen ions (H+)
Arrhenius: an acid is a substance which when dissolved in water will release H⁺ ions.
HₓY(aq) ⇒ xH⁺(aq) + Yˣ-(aq)
The ideal gas law is equivalent to Charles's law when
a) volume equals 22.4 L
b)R equals 0
c)number of moles and temperature are constant
d)number of moles and pressure are constant
The ideal gas law is equivalent to Charles's law when number of moles and pressure are constant (option D)
Ideal gas equationPV = nRT
Where
P is the pressure V is the volume n is the number of mole R is the gas constant T is the temperature Charles' lawCharles' law states as follow:
V₁ / T₁ = V₂ / T₂
Where
V₁ is the initial volume T₁ is the initial temperature V₂ is the new volume T₂ is the new temperature How to relate ideal gas equation to Charles' lawPV = nRT
Divide both side by T
PV / T = nR
Divide both side by P
V / T = nR / P
Let nR / P be costant
V / T = constant
Thus,
V₁ / T₁ = V₂ / T₂
From the above illustrations, we can conclude that the ideal gas equation will become Charles' law equation if the number of mole and pressure are constant (Option D)
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Describe the different seasonal changes of the weasel in Florida and the weasel in Wyoming during the
winter season.Science
Answer:
molting allows for this adaptaion.
its fur slowly changes color
thanks!
Explanation:
Answer:
The differences between the Florida's weasel and in Wyoming's is that I can see that in Wyoming it has a lot of snow so Wyoming's weasel fur is more thicker than Florida's weasel.
Explanation:
Overmore, in Florida's weasel the weasel's fur is much more less then Wyoming's weasel's fur. Subsequently, their fur color is very different. In Wyoming's weasel fur, it's white fur help them blend in the snow. In Florida's weasel fur, it's brown and help blend in the grass(soil).
Isaac is baking a cake and needs to add flour weighing 5.85 oz to the mixture. if there are 28.3495 g in one ounce, how many grams of flour does he need to add? a. 4.85 g b. 20.64 g c. 158.69 g d. 165.84 g
The quantity of floor needed by the Isaac for making the cake will be equal to 165.844575 gram
What is a Unit Conversion system?
Unit conversion is a multi-step process that involves multiplication or division by a numerical factor, selection of the correct number of significant digits, and rounding.
Given that
1 oz =28.3495 gram
Therefore 5.85 oz will give x gram
X gram is what we are looking for
X gram= 5.85 oz× 28.3495g/1
Xg= 165.844575 gram
Approximately 165.8446 gram
Thus, Isaac needs to add 165.8446g of flour to the mixture to make 5.85 oz
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What is important fraction of paraffin wax and asphalt? a. Fuel oil b. Diesel oil c. Kerosene oil d. Residue oil
The fraction of parafin wax and asaphalt is diesel oil
What is fractional distillation?Fractional distillation is the process by which crude oil are separated in to different form base on their molecular weight and boiling points by petroleum refineries .
parafin wax and asaphalt is use for making roads and candles.
Therefore, The fraction of parafin wax and asaphalt is diesel oil.
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Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation: ()zn ()hcl → ()zncl2 ()h2
Based on the chemical equation, to balance the equation we use 2 as a coefficients of HCl on left hand side of reaction.
What is balanced equation?Balanced chemical equations are those equation in which each entities are present in same amount on left side as well as on the right side of the chemical reaction.
Given chemical reaction is:
Zn + HCl → ZnCl₂ + H₂
Above reaction is not balanced equation as number of chlorine and hydrogen atoms are not same, so balanced equation will be:
Zn + 2HCl → ZnCl₂ + H₂
Hence we add 2 as a coefficient of HCl to balance the equation.
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Answer:
1 2 1 1
Explanation:
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Which of the following represents enthalpy on this graph?
Question 1 options:
1
2
3
4
exothermic reaction is reactants accomphen by evolution of heat
Please answer questions 7-13 for alpha and beta decay. I need help!!!!!!!
In redox reactions, electrons are ____.
A)shared
B)lost
C)transferred
D)not needed
Answer:
C
Explanation:
This is the only option that gives the right option as in redox reaction electron are lost and gained by different atoms. Not shared or not needed are not right
A hydrocarbon with this formula C4H6 is what?
a. indeterminate
b. s unstable
c. is somewhat reactive
d. is chemically inert
Let's check
C_4H_6[tex]\\ \rm\Rrightarrow C_4H_{2(4)-2}[/tex]
[tex]\\ \rm\Rrightarrow C_4H_{8-2}[/tex]
[tex]\\ \rm\Rrightarrow C_4H_6[/tex]
It has tripple bondIt follows rule C_nH_2n-2Belongs to alkyne groupSo
It's unstableOption B