Answer:
Using my (not very precise) periodic table, I get the mass of Ag as 107.87
Explanation:
This must be a combination of these two isotopes. So the % of the other isotope must be 48.16%.
To work with these percentages in an equation I'll use them as decimals.
So now I can start putting them into an equation:
107.87 = ( 106.905 ⋅ 0.5184 ) + ( x ⋅ 0.4816 )
Because both of the isotope masses, multiplied by their percentage, would give us the overall average mass.
107.87 = 55.419552 ⋅ ( x ⋅ 0.4816 )
Worked out the brackets that we can work out, and then rearrange to give:
107.87 − 55.419552 = ( x ⋅ 0.4816 )
Again rearrange:
52.450448 = ( x ⋅ 0.4816 )
And final rearranging:
x = 52.450448 - 0.4816
x
=
108.909
(using same sig figs as given in question)
You probably want to work through that again using your periodic table value for Ag.
BRAINLIEST PLEASE HELP WITH THIS CHEMISTRY QUESTION!!
Which of the following describes how further studies supported the work done by Ernest Rutherford?
Answer: James Chadwick discovered neutral particles in the nucleus. So your answer is C
Explanation:
I just took a pretest and I had this same question and I got it right
Answer:
James Chadwick discovered neutral particles in the nucleus.
Chromium(III) oxide reacts with hydrogen sulfide (H2S) gas to form chromium(III) sulfide and water: Cr2O3(s) + 3H2S(g) → Cr2S3(s) + 3H2O(l) To produce 156 g of Cr2S3, (a) how many moles of Cr2O3 are required? mol (b) how many grams of Cr2O3 are required? g
Answer:
(a) 0.779 mol Cr₂O₃
(b) 118 g Cr₂O₃
Explanation:
Step 1: Convert 156 g Cr₂S₃ to moles
Cr Molar Mass - 52.00 g/mol × 2 = 104.00 g/mol
S Molar Mass - 32.07 g/mol × 3 = 96.21 g/mol
156 g Cr₂S₃ ÷ 200.21 g/mol = 0.779182 mol Cr₂S₃
Step 2: Find conversion from Cr₂S₃ to Cr₂O₃
1 mol Cr₂S₃ equals 1 mol Cr₂O₃
Step 3: Use Dimensional Analysis
0.779182 mol Cr₂S₃ · [tex]\frac{1 \hspace{2} mol \hspace{2} Cr_2O_3}{1 \hspace{2} mol \hspace{2} Cr_2S_3}[/tex] = 0.779182 mol Cr₂O₃
0.779182 mol Cr₂O₃ ≈ 0.779 mol Cr₂O₃ (3 significant figures)
Step 4: Convert moles to grams
Cr Molar Mass - 52.00 g/mol × 2 = 104.00 g/mol
O Molar Mass - 16.00 g/mol × 3 = 48.00 g/mol
0.779182 mol Cr₂O₃ · 152.00 g/mol = 118.436 g Cr₂O₃
118.436 g Cr₂O₃ ≈ 118 g Cr₂O₃ (3 significant figures)
28 Which of the following equations does not represent a redox reaction?
A
B
с
D
2AgBr (s) → 2Ag (s) + Br2 (g)
Cu2+ (aq) + Zn (s) → Cu (s) + Zn2+ (aq)
2Fe (s) + 3Cl2 (9) ► 2FeCl3 (s)
MgO (s) + 2HCl (aq) → MgCl2 (aq) + H20 (1
Answer:
The answer is D. In the reactions A,B and C the reactants undergo changes in oxidation number. And also the reaction D is an acid_base neutralization reaction.
Please help me with this? :(
Answer:
1. Diagram C.
2. Diagram A.
Explanation:
1. Calcium atom, Ca has 20 protons and 20 electrons. On the other hand, Calcium ion, Ca^2+ has 20 protons and 18 electrons. This is true because the +2 charge on the calcium ion, Ca^2+ indicates that the calcium atom, Ca has loss 2 electrons.
From the above illustration we can say that calcium ion, Ca^2+ has the following:
Proton = 20
Electron = 18
Therefore, diagram C indicates calcium ion, Ca^2+.
2. Fluorine atom, F has 9 protons and 9 electrons. Fluoride ion, F¯ has 9 protons and 10 electrons. This is so because the –1 charge on the fluoride ion, F¯ indicates that the fluorine atom, F has gained 1 electron.
Thus, we can say that the fluoride ion, F¯ has the following:
Proton = 9
Electron = 10
Therefore, diagram A represent fluoride ion, F¯.
Solute and solvent in pasta
Answer:
It depends on what kind of pasta it is
Can you help me answer the question ?
What are the components of the water-based carbon cycle?
Answer:
Carbon gets incorporated into marine organisms as organic matter or structural calcium carbonate.
Explanation:
ur welcome
Carbon gets incorporated into marine organisms as organic matter or structural calcium carbonate.
What is the carbon cycle?The carbon cycle describes how carbon moves between the atmosphere, soils, living creatures, the ocean, and human sources.
Carbon gets incorporated into marine organisms as organic matter or structural calcium carbonate. When organisms die, their dead cells, shells and other parts sink into deep water. Decay releases carbon dioxide into this deep water.
Learn more about the carbon cycle here:
https://brainly.com/question/1627609
#SPJ2
Which pair of elements have chemical properties that are most similar
[tex]\text{Hello there! :)}[/tex]
Answer:
[tex]\large\boxed{(B)}[/tex]
Elements on the periodic table that are the closest in characteristics are in the same group, or column.
Looking at the answer choices, the only two pairs of elements that are in the same group are (B) Al and Ga, as well as (D) F and I.
On the periodic table, Al (Aluminum) and Ga (Gallium) are only one period (row) away from each other, while F (Flourine) and I (Iodine) are 3 periods away.
***Periods determine the number of energy levels and other properties, so elements that are closer to each other would have more similar properties.
Therefore, Aluminum and Gallium contain the most similar chemical properties.
Which of the following pairs of elements are most likely to form an ionic bond?
A- Br and Ca
B- Br and N
C- Ca and Mg
D- Ca and Fe
Answer:
Ionic bonds ussally form with a metal, and a non metel elements, so the answer would most likley be B.
Explanation:
hope I could help
A non-conservative force acting on a particle:_________.
A) does work that can depend on the path of motion.
B) does work equal to the change in the kinetic energy of the particle.
C) does work that is never equal to the change in kinetic energy of the particle.
D) can not have an associated potential energy function.
E) does work that only depends on the endpoints of the path, not on the path between the endpoints.
Answer: Option A.
does work that can depend on the path of motion.
Explanation:
A non-conservative force acting on a particle does work that can depend on the path of motion because a non conservative force is a type of force that can remove energy from a progressive system and this energy cannot be restored back and the forces are path dependent because it matters where the particle begin or end.
It is a type of force such as friction or air resistance. This type of force does work that only depend on the path of motion.
is there any compound like O2C NO2
Answer:
Aye Wassup? Adam Here :D
Explanation:
Nitrogen dioxide is a chemical compound with the formula NO 2.It is one of several nitrogen oxides. NO 2 is an intermediate in the industrial synthesis of nitric acid, millions of tons of which are produced each year for use primarily in the production of fertilizers.At higher temperatures it is a reddish-brown gas.
Hope This Helped Bro: "AdamDaAssasin"
The solubility of sugar at 50°C is 260/100g water,and at 0°Cis 180g/100g water. What mass of sugar,will be deposited if 60g the saturated solution at 50°C is cooled to 0°C
Explanation:
27 °0 bc that how it is so this is the answer
3. Diesel fuel has a density of 0.839g/mL What is the volume, in gallons, of 2.3 kg of diesel? [1 gallon = 3.79 L)
Answer:
0.71 gal
Explanation:
Step 1: Given data
Density of Diesel (ρ): 0.839 g/mL
Mass of Diesel (m): 2.3 kg
Step 2: Convert "m" to grams
We will use the relationship 1 kg = 10³ g.
2.3 kg × (10³g/1 kg) = 2.3 × 10³ g
Step 3: Calculate the volume (V) of the Diesel sample
We will use the density formula.
ρ = m/V
V = m/ρ
V = 2.3 × 10³ g/(0.839 g/mL)
V = 2.7 × 10³ mL
Step 4: Convert "V" to L
We will use the relationship 1 L = 10³ mL.
2.7 × 10³ mL × (1 L / 10³ mL) = 2.7 L
Step 5: Convert "V" to gal
We will use the relationship 1 gal = 3.79 L.
2.7 L × (1 gal/3.79 L) = 0.71 gal
Answer:
2.3 kg x1000 g/kg = 2300 g
2300 g x 1 ml/0.839 g = 2741 ml
2741 ml x 1 L/1000 ml = 2.741 L
2.741 L x 1 gal/3.79 L = 0.72 gallons
Explanation:
john has a solution with a pH of 12.21. what is the hydrogen ion concentration of this solution?
Answer:
In this way, ph is determined by hydrogen ion concentration . In the case of neutral solution [H+] =10-7 which we call a ph of 7. This means, for example, that a hydrogen-ion concentration of a solution with a ph of 4 is 10-4 mol/l, meaning it contains 0.0001 mole of hydrogen ion in a solution of 1 liter.
What ions are present in an aqueous solution of NiCl2?
Answer:
Ni²⁺ and Cl⁻ ions
Explanation:
NiCl₂ is an ionic compound which is composed by 2 chloride ions (Cl⁻) and 1 nickel (II) ion (Ni²⁺). It dissociates in water as follows:
NiCl₂ ⇒ Ni²⁺ + 2 Cl⁻
Therefore, in an aqueous solution of NiCl₂ will be present Ni²⁺ ions and Cl⁻ ions.
How many cm are in 29.7km?
Answer:
there are 2970000cm in 29.7km
Explanation:
What is the solubility product expression for Zn3(PO4)2?
Answer:
[tex]Ksp=[Zn^{2+}]^3[PO_4^{3-}]^2[/tex]
Explanation:
Hello,
In this case, since the equilibrium dissociation of zinc phosphate is:
[tex]Zn_3(PO_4)_2(s)\rightleftharpoons 3Zn^{2+}(aq)+2(PO_4)^{3-}(aq)[/tex]
Due to the fact that only the zinc and phosphate ions are in aqueous state, the solubility product expression is written considering the law of mass action in which the concentration of each species is powered to the corresponding stoichiometric coefficient as follows:
[tex]Ksp=[Zn^{2+}]^3[PO_4^{3-}]^2[/tex]
Best regards.
What is the freezing point of an aqueous 1.00 m NaCl solution? (Kf = 1.86 *C/m) (Assume complete dissociation of the salt.)
Answer:
The freezing point is -3.72 degrees Celsius
Explanation:
In this question, by assuming the complete dissociation of the salt, we want to calculate the freezing point of an aqueous 1 M NaCl solution .
We proceed as follows;
Firstly, we write the dissociation equation;
NaCl ——> Na+ + Cl-
So the number of ions present in the dissociation is 2. This means that the Vant Hogg factor also called I = 2
Mathematically;
ΔTf = Kf*m*i
m represents the molality which is given as 1
So by substituting the values, we have;
ΔTf = 1.86 * 1 * 2 = 3.72 degrees Celcius
The freezing point however is 0 - ΔTf = 0 - 3.72 = -3.72 degrees Celcius
Which option gives an object's volume in SF units?
O
A. 4.3 kg
B. 2.6 m3
C. 5.5 K
D, 3.4L
SUBMIT
Answer:
The correct answer is:
2.6 m3 (B)
Explanation:
SF unit stands for Stowage factor unit. Stowage factor is the volume occupied by one unit of mass (weight) when stowed in cargo space. SF expresses the unit in cubic meters (m³) or cubic feet. SF is a unit of measurement that indicates how much space (volume) a particular unit of cargo occupies in a ship's cargo compartment
Observations made during an experiment are called
what is biotic?check all that apply
Answer: biotic is Living things in their ecological relations.
Explanation:
Draw an important resonance form to show the delocalization of charge in the ion shown below.
Interactive 3D display mode
Answer:
Hello attached below is the missing ion diagram
Explanation:
Attached below is an important resonance form that shows the delocalization of charge in the ion shown
3. The 2 in 1s2 represents the number of
located in that energy level.
Answers:
electrons
protons
Answer:
electrons
Explanation:
In an atom, you can have varying numbers of electrons, depending on if its an ion or not. You can use the orbitals to see the energy level of the atom.
An atom has only one number of protons. The number of protons cannot vary.
What is a single covalent bond?
Answer: Single Covalent Bonds
Hydrogen and chlorine coming together is an example of a single covalent bond. Two hydrogen atoms will also come together to form a single covalent bond, as will two chlorine atoms. In these examples, each individual atom has just one unpaired electron to share with the other atom.
A Little Backstory I Guess: In chemistry, a single bond is a chemical bond between two atoms involving two valence electrons. That is, the atoms share one pair of electrons where the bond forms. Therefore, a single bond is a type of covalent bond.
sorry its so long :/ hope this even relatively helps...
Which of these is a chemical property?
boiling point
odor
ability to rust
color
Answer:
ability to rust
Explanation:
i'm like 90% sure thats correct
You have two compounds that you have spotted on the TLC plate. One compound is more polar than the other. You ran the TLC plate with neat hexanes and found that only one spot moved a small distance up the plate. What might you expect to see if you ran a TLC plate in a 50/50 mixture of hexanes and ethyl acetate
Answer:
we will except an increase in the polarity of the system and this will cause the Non-polar spot to be near the solvent front, while the polar spot will run at an approximate speed of 0.5 Rf
Explanation:
when we run a TLC plate in a 50/50 mixture of hexanes and ethyl acetate we will except an increase in the polarity of the system and this will cause the Non-polar spot to be near the solvent front, while the polar spot will run at an approximate speed of 0.5 Rf
The speed of the polar spot depends largely on the level of polarity, an increase in the polarity will see both spots of Neat hexane run when we run a TLC plate in a 50/50 mixture of hexanes and ethyl acetate
A change in the number of neutrons in an atom will change an isotope. What will happen when the number of protons changes in an atom?
If a boy was standing on his head, his mouth would be ___ to his nose.
Answer:
The correct answer is "inferior".
Explanation:
In anatomy, the term inferior is used to describe parts of the body that are below other part used as reference. Inferior comes from the Latin "inferus" that means "below". In this case, the mouth will always be inferior to the nose, it doesn't matter if the boy was standing on his head or if he is in other position.
Answer:
correct answer, inferior.
Explanation:
of little or less importance, value, or merit always felt inferior to his older brother. 2a : of low or lower degree or rank. b : of poor quality : mediocre. 3 : situated lower down : lower.
If one person is regarded as inferior to another, they are regarded as less important because they have less status or ability. He preferred the company of those who were intellectually inferior to himself.
Hope this helped!
7. What happen if we don't have water?
Answer:
our bodies will dehydrate causing us to die a dreadfully excruciating painful death
Please help asap!! Need help for problem #2.
Naturally occuring iron, contains 5.82% ^54Fe, 91.66% ^56Fe, 2.19% ^57Fe, and 0.33% ^58Fe. The reslective atomic masses are 53.940 amu, 55.935 amu, 56.935 amu and 57.933 amu. Calculate the average atmoic mass of iron. (show work)
Answer:
55.56 amu
Explanation:
Let A, B, C and D represent the four isotopes of iron.
The following data were obtained from the question:
Isotope A (Fe-54):
Mass of A = 53.940 amu
Abundance (A%) = 5.82%
Isotope B (Fe-56):
Mass of B = 55.935 amu
Abundance (B%) = 91.66%
Isotope C (Fe-57):
Mass of C = 56.935 amu
Abundance (C%) = 2.19%
Isotope D (Fe-58):
Mass of D = 57.933 amu
Abundance (D%) = 0.33%
Average atomic mass =.?
The average atomic mass of the iron can obtained as follow:
Average atomic mass = [(mass of A × A%)/100] + [(mass of B × B%)/100] + [(mass of C × C%)/100] + [(mass of D × D%)/100]
Average atomic mass = [(53.940 × 5.82)/100] + [(55.935 × 91.66 )/100] + [(56.935 × 2.19)/100] + [(57.933 × 0.33)/100]
= 2.848 + 51.270 + 1.247 + 0.191
= 55.56 amu
Therefore, the average atomic mass of the iron is 55.56 amu