a. 661.23 m/s
b. the rate of effusion of Ammonia = 4.5 faster than Silicon tetra bromide
Further explanationGiven
T = 25 + 273 = 298 K
Required
a. the gas speed
b. The rate of effusion comparison
Solution
a.
Average velocities of gases can be expressed as root-mean-square averages. (V rms)
[tex]\large {\boxed {\bold {v_ {rms} = \sqrt {\dfrac {3RT} {Mm}}}}[/tex]
R = gas constant, T = temperature, Mm = molar mass of the gas particles
From the question
R = 8,314 J / mol K
T = temperature
Mm = molar mass, kg / mol
Molar mass of Ammonia = 17 g/mol = 0.017 kg/mol
[tex]\tt v=\sqrt{\dfrac{3\times 8.314\times 298}{0.017} }=661.23~m/s[/tex]
b. the effusion rates of two gases = the square root of the inverse of their molar masses:
[tex]\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
M₁ = molar mass Ammonia NH₃= 17
M₂ = molar mass Silicon tetra bromide SiBr₄= 348
[tex]\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{348}{17} }=4.5[/tex]
the rate of effusion of Ammonia = 4.5 faster than Silicon tetra bromide
in the group the reactivity of metals increases? give example
Answer:
As sodium and potassium both are alkali metals that belong to Group IA of the periodic table. They have one valence electron in their valence shell. As we move from top to bottom, the reactivity of metallic elements of Group IA increases.
Oxygen and carbon monoxide react to form carbon dioxide as
shown in the following reaction
O2 (g) + 2CO (g) - 2CO2 (g)
If a sample of 70.0 g of carbon monoxide was reacted with
32.0 g of oxygen, how many moles of carbon dioxide would be
produced?
moles
Answer:
The number of moles of carbon dioxide that would be produced is 2 moles
Explanation:
The given reaction is presented as follows;
O₂ (g) + 2CO (g) → 2CO₂ (g)
The parameters given are;
The mass of the carbon monoxide, m₁ = 70.0 g
The mass of the oxygen, m₂ = 32.0 g
The molar mass of carbon monoxide = 28.01 g/mol
The molar mass of oxygen gas O₂ = 32.0 g/mol
The number of moles, n = (The mass)/(The Molar Mass)
The number of moles of carbon monoxide in the reaction = 70.0 g/(28.01 g/mol) = 2.49910746 moles ≈ 2.5 moles
The number of moles of oxygen in the reaction = 32.0 g/(32.0 g/mol) = 1 moles
Therefore, from the chemical reaction, we have;
One mole of O₂ reacts with two moles of CO to produce two moles of CO₂ (g)
1 mole of oxygen produces 2 moles of carbon dioxide
Therefore, given that the number of moles of oxygen in the reaction is 1 mole, we have that the number of moles of carbon dioxide that would be produced = 2 moles.
1.) Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom. Based on this information,
what is the mass number?
Answer:
Explanation:
47 i took the test
Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom. Based on this information, the mass number of the silver would be 107.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.
As given in the problem Silver (Ag) has 47 protons, 60 neutrons, and 47 electrons in each atom.
The atomic number of the silver = number of protons
= 47
The mass number of the silver = number of protons + number of neutrons
=47 + 60
=107
Thus, based on the given information the mass number of the silver would be 107.
To learn more about the atomic number from here, refer to the link;
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The breakdown of proteins produces:
A. Carbon Dioxide
B. Urea
C. Water
D. Glucose
Answer:
Glucose
Explanation:
hope it helps
Which mineral is used in batteries
Batteries come in all shapes and sizes, and depending on the type of battery, the minerals that compose them are mainly lithium, cobalt, graphite, nickel and manganese.
Which of the following is an example of a compounds?
Select one:
a.Cu
b.CaCl2
c.Na
d.Nd
Answer:
b. CaCl2
Explanation:
It consists two elements
The substance that can be said to be a compound would be = CaCl2. That is option B.
What is a chemical compound?A chemical compound is defined as the substance that is made up of two or more elements that are chemically combined together.
Typical examples of chemical compounds include the following:
Molecular compounds: These are made up of two elements such as NaCl, CaCl2, H2O.Ionic Compound. Intermetallic Compounds. Coordinates Compound.Learn more about chemical compounds here:
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Write an ionic equation for the reaction of zinc and dilute hydrochloric acid, include state symbols.
Explanation:
When zinc reacts with dilute hydrochloric acid, it is a metal-acid reaction to produce zinc chloride and hydrogen gas.
Zn (s) + 2HCl (aq) => ZnCl2 (aq) + H2 (g)
Ionic equation:
Zn2+ (aq) + 2Cl- (aq) => ZnCl2 (aq)
I will not be cooking ever again
Lm/aooooo was that supposed to be a quesadilla?
Answer:
why it just a mistake everyone make a mistake i belive in you.
Explanation:
If earths glaciers were to melt what would be the most likely effect in florida
Answer:
Well if glaciers were to most likley melt wit would have a big affect on the world. But on Florida the affect would be as everybody would expect, a flash flood, with high water's and everything under water. AND there would most lilkley be something in the glacier. Not highly sure about it though
Explanation:
Hope this helps!
Pls mark brainlest!
What function does a cell wall serve for a plant?
It provides the plant cell with structure and support, along with protection from bursting due to turgor pressure
Explanation:
Select the correct answer. Which notation is used to represent a beta particle?
Explanation:
I think the notation used to represent beta is B
Answer:
[tex]\frac{0}{-1} \beta[/tex]
Explanation:
A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay. There are two forms of beta decay, β− decay and β+ decay, which produce electrons and positrons respectively.[2]
Beta particles with an energy of 0.5 MeV have a range of about one metre in air; the distance is dependent on the particle energy.
Beta particles are a type of ionizing radiation and for radiation protection purposes are regarded as being more ionising than gamma rays, but less ionising than alpha particles. The higher the ionising effect, the greater the damage to living tissue, but also the lower the penetrating power of the radiation.
~Wikipedia
What is the balanced equation for the reaction of a solution of sodium sulfate is mixed with strontium chloride?
Select one:
a.Na2SO4(aq) + SrCl2(aq) = 2 NaCl(aq) + SrSO4(s)
b.Na2SO4(aq) + SrCl2(aq) = NaCl(s) + SrSO4(aq)
c.NaSO4(aq) + SrCl(aq) = NaCl(aq) + SrSO4(aq)
d.NaSO4(aq) + SrCl(aq) = NaCl(aq) + Sr2SO4(aq)
Answer:A
Explanation: reactants: Na2SO4 and SrCl2
Products: NaCl and SrSO4
Substance X is a compound containing 632mg of manganese and 368mg of oxygen. Substance X is shown
below. Manganese has a relative atomic mass of 55 and oxygen has a relative atomic mass of 16. What is the
value of y in the formula below?
The empirical formula : MnO₂.
Further explanationGiven
632mg of manganese(Mn) = 0.632 g
368mg of oxygen(O) = 0.368 g
M Mn = 55
M O = 16
Required
The empirical formula
Solution
You didn't include the pictures, but the steps for finding the empirical formula are generally the same
Find mol(mass : atomic mass)Mn : 0.632 : 55 = 0.0115
O : 0.368 : 16 =0.023
Divide by the smallest mol(Mn=0.0115)Mn : O =
[tex]\tt \dfrac{0.0115}{0.0115}\div \dfrac{0.023}{0.0115}=1\div 2[/tex]
The empirical formula : MnO₂
What does adding a catalyst to a reaction do?
Select all that apply.
increase the amount of each product formed by the reaction
lower the activation energy of the reaction (correct)
alter the orientation of reactants in the reaction
increase the rate of the reaction (correct)
yes both B and D are correct
Catalysts lower the activation energy of the reaction therefore, the rate of reaction will increase. Therefore, option B, D are correct.
What is a catalyst?Catalysis can be defined as the process of enhancing the rate of a reaction by adding a substance or chemical compound known as a catalyst. Catalysts are usually not consumed in the chemical reaction and can be recovered unchanged after the completion of the reaction.
The catalyst can be recycled quickly, and little amounts of catalysts are sufficient for mixing, temperature, and surface area are factors in the reaction rate. The catalyst reacts with one or more reactants to generate intermediates that provide the final product.
The addition of a catalyst can lower the activation energy of reactant molcules, therefore, increasing the rate of the reaction. Because catalysts increase in frequency the successful collision as more reactant molecules have activation energy.
Learn more about Catalysts, here:
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Balance this chemical equation
Sodium atomic radius 1.90
magnesium atomic radius 1.60
aluminium atomic radius 1.32
(a) Explain the trend in the atomic radius across the period.
(b) Predict the the P.H of the solution of sodium Oxide.
Answer:
For a: The increasing of atomic radius is:
Al < Mg < Na
For b: The pH of the solution of sodium oxide is greater than 7.
Explanation:
For (a):Atomic radius is defined as the distance of the nucleus to the outermost shell containing electrons.
It decreases as we move from left to right in a period because electrons get added up in the same shell and effective nuclear charge increased which results in the shrinkage of the atom.
Sodium lies in Period 3, group 1. Its atomic radius is 1.90
Magnesium lies in Period 3, group 2. Its atomic radius is 1.60
Aluminium lies in Period 3, group 3. Its atomic radius is 1.32
The increasing of atomic radius will be:
Al < Mg < Na
The mathematical values proves the result.
For (b):There are 3 types of solution based on pH:
If pH > 7, the solution is basic in nature. If pH < 7, the solution is acidic in nature.If pH = 7, the solution is neutral in nature.When a metal reacts with oxygen present in air, it forms basic oxide which simply means when they react with water, they form basic solution.
The chemical equation for the reaction of sodium (metal) with oxygen present in air and reaction with water of the product so formed are as follows:
[tex]4Na+O_2\rightarrow 2Na_2O[/tex]
[tex]Na_2O+H_2O\rightarrow 2NaOH\text{ (base)}[/tex]
Sodium forms a basic solution when its oxide reacts with water, therefore the pH of the solution will be greater than 7.
could someone answer the first one for me, i’ll give brainliest. thx!
Answer:
B.....................
Explanation:
....... ......... .......... ......... ............ ....... ...
Name the following compound with a polyatomic ion: Na₂SO₄ *
Answer:
sodium sulfate
Explanation:
For naming an ionic compound with polyatomic anion, the metal is written first using its element name followed by name of the polyatomic anion. Therefore, the compound with Na+Na+ cation and SO2−4SO42− anion is named as sodium sulfate.
All of the elements in the actinide family are ?
(liquids/radioactive).
Answer:
Radioactive
Explanation:
:D
Answer:
c-Radioactive
Explanation:
What mass of silver chloride can be produced from 1.01 L of a 0.196 M solution of silver nitrate?
Express your answer with the appropriate units.
Mass of Silver chloride-AgCl = 28.314 g
Further explanationGiven
1.01 L of a 0.196 M solution of Silver nitrate
Required
Mass of Silver chloride
Solution
Reaction
AgNO₃ + NaCl ⇒ AgCl + NaNO₃
mol of AgNO₃ :
mol = M x V
mol = 0.196 x 1.01
mol = 0.198
From equation, mol ratio of AgNO₃ : AgCl = 1 : 1, so mol AgCl = 0.198
mass AgCl (MW=143 g/mol) :
mass = mol x MW
mass = 0.198 x 143
mass = 28.314 g
A bottle of H3PO4 contains 30.00 g, how many moles are in this container?
Moles in the container : 0.306
Further explanationGiven
30 g of H3PO4
Required
moles in container
Solution
A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12
1 mole = 6.02.10²³ particles
While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule
MW of H3PO4 = 3.1 + 31 + 4.16 = 98 g/mol
mol = mass : MW
mol = 30 : 98
mol = 0.306
In pea plants the trait for green sea pods ( G) is dominant over the trait for yellow seed pods (g) which cross will produce the maximum number of offspring with green sea pods?
Answer:
See the answer below
Explanation:
The cross that would produce the maximum number of offspring with green sea pods would be:
1. GG x GG, or
2. GG x gg
The first one would produce all green offspring with homzygous genotypes as follows:
GG x GG
GG GG GG GG
The second cross would produce all green offspring with heterozygous genotypes as follows:
GG x gg
Gg Gg Gg Gg
Possible answers: conduction, convection, radiation Heat is carried away from the pot in all different directions. This shows: Warm water rises within the pot. This shows: Heat moves from the flame to the pot's bottom. This shows:
Answer:
Heat is carried away from the pot in all different directions. This shows: RADIATIONWarm water rises within the pot. This shows: CONVECTIONHeat moves from the flame to the pot's bottom. This shows: CONDUCTIONExplanation:
Conduction involves transfer of heat energy through a solid medium; convection involves heat transfer of fluid particles in their masses, while thermal radiation is transfer via electromagnetic waves in a vacuum.
I hope this was helpful.
Lets study what conduction, convection and radiation are:
Conduction explains the process in which the transfer of heat takes place between objects by direct contact. Convection refers to the form of heat transfer in which energy transition occurs within the fluid. It helps the heat to pass through fluids. Radiation helps the heat to flow through empty spaces.Learn more:
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Which element, when combined with fluorine, would most likely form an ionic compound
1. A gas at 24.0 Celsius and.900 atm fills a 0.95 Liter container.
What is its ending pressure (in atm) if the temperature changes
to 75 Celsius? Show all your work.
Answer:
P₂ = 1.05 atm
Explanation:
Given data:
Initial temperature = 24.0 °C (24+273 = 297 K)
Initial pressure = 0.900 atm
Final pressure = ?
Final temperature = 75 °C (75 + 273 =348 K)
Volume = constant
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
0.900 atm / 297 K = P₂/348 K
P₂ = 0.900 atm × 348 K / 297 K
P₂ = 313.2 atm. K /297 K
P₂ = 1.05 atm
Describe the general
trends for ionic radius.
2. What are the ions present in the compound CsF? *
(1 Point)
O Cs- and F-
Cs- and F+
Cs+ and F-
Cs and F only
Answer:
Cs+ and F-
Explanation:
The compound CsF is made up of two elements; Caesium (Cs) and F (Flourine)
Caesium is a metal and would therefore lose electrons - a cation is formed. When Caesium loses a single electron, the ion symbol is given as; Cs+
Flourine is a non metal and would therefore gain electrons - an anion is formed. When Flourine gains a single electron, the ion symbol is given as; F-
Hence the correct option is;
Cs+ and F-
The distance an object is off the ground or from the bottom.
Group of answer choices
Weight
Height
Acceleration
Gravitational Potential Energy
Answer:
height is the answer
Explanation:
none of the others work
3. (04.02 MC) Which component is missing from the process of photosynthesis? Carbon Dioxide + Water + ________ Glucose + Oxygen
Sunlight
Sugar
Plants
Carbon
Answer:
Sunlight
Explanation:
Sunlight is always neccesary in photosynthesis
Answer:
Carbon Dioxide + Water + Sunlight → Glucose + Oxygen.
Explanation:
Which of the following is not a reason to volunteer?
A
to make money
B
to feel good about yourself
C
to have a sense of accomplishment
D
to gain experience
Answer:
A. To make money
Explanation:
Answer:
hi
Explanation:
A. to make money
have a nice day
bye