How would I solve this problem? How would I find the Atomic Mass for each isotope?
Answers
Answer:
126.86 amu
Explanation:
You divide each percent abundance by 100 and multiply it by the atomic masses and then add them all up to get the average atomic mass.
(.80 x 127) + (.17 x 126) + (.03 x 128) = 126.86 amu
Related Questions
which clue can be identify a chemical reaction as a replacemnt reaction
Answers
Answer:
Hello! Your answer is : Double replacement
Use what you know about phase changes, mixtures, and chemical reactions to answer the following questions.
Which of these is a chemical reaction?
Answers
Answer:
D- beaking bread
Explanation:
The trapped carbon dioxide makes the dough rise, and the alcohol evaporates during the baking process this is an irreversible chemical change.
what is Bohr's atomic model?
Answers
Answer:
The Bohr model and all of its successors describe the properties of atomic electrons in terms of a set of allowed (possible) values. Atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states. Direct experimental evidence for the existence of such discrete states was obtained (1914) by the German-born physicists James Franck and Gustav Hertz.
Explanation:
Please help ASAP I’ll make you as brainlister
Answers
Answer:
Iridium (II) oxygen
Sorry if I'm wrong, it could be Iridium (I) oxygen, but the higher chance is Iridium (II) oxygen.
if an atom of neon absorbed energy what would initially happen to its outermost electrons?
Answers
Answer:
The outermost electrons would reach its full shell. It would also become more negative in charge.
Explanation:
Since there are 7 electrons, gaining energy(by electrons) would complete the outer layer with 8 valence electrons. So the charge would be more negative, and also reaching a full shell. It would also become stable and not want more electrons.
Hope this helps!
This is a widely used nonrenewable resource that is formed over millions of years. A wood B water C oil D sand
Answers
Answer: C. oil
Explanation:
Two or more elements or compounds combine to make one complex substance
Answers
Answer:
Synthesis reaction
Explanation:
Two or more elements or compounds combining to make one complex substance occurs in a synthesis reaction.
A synthesis or combination reaction is one that involves the formation of a single product from two or more reactants.
A + B + C → D
A substance is considered more efficient at storing energy when its specific heat enables it to resist changes in temperature. So, a more efficient substance will stay hotter, or cooler, for longer. Which substance—air or water—stores energy more efficiently under equal conditions?
Answers
Answer:
Water stores energy more efficiently than air.
Explanation:
Answer:
Water stores energy more efficiently than air.
Explanation:
Edmentum's sample answer
Help meee, if u help me i give u a pizza :)
Answers
The number of Oxygen atoms in both of glucose and fructose is 6 atoms, which means 12 in total ,but the sucrose is 11 atoms of Oxygen although it's composed of fructose and glucose, the question where the atom number 12 go ?
Answers
Answer:
The atom number 12 of oxygen contributes to the formation of water (H2O) during the process of forming sucrose.
Explanation:
Sucrose is a dissacharide carbohydrate i.e it contains two simple sugars or saccharides. The two simple sugar monomeric components of sucrose are glucose and fructose. As rightly stated in this question, the number of Oxygen atoms in both of glucose and fructose is 6 atoms respectively, which means 12 in total, however, the sucrose molecule has 11 atoms of oxygen meaning 1 oxygen atom is missing.
Sucrose is formed from glucose and fructose by a process called DEHYDRATION REACTION. A dehydration reaction means that one MOLECULE OF WATER IS LOST in order to form a glycosidic linkage/bond that joins fructose and glucose monomeric sugars together in the sucrose molecule. Two hydrogen atoms and ONE OXYGEN atom from the supposed 12 is used to form the WATER MOLECULE.
Can someone help me with this science
Answers
Answer:
Yes I'll help you
read the instructions and answer
Answers
Answer:
laughing this question is a joke I think at first .
Explanation:
there are many mistakes : electrons are revolving in shell or orbits around the nucleus.
first shell always has two electron
after first shell , all shells contains eight electrons
electron have negative charge
proton have positive charge
nucleus have no charge
atom is neutral becoz the + charge of proton. and - charge of electron cancel each other's effect and atom is stable and neutral
Help on this question!
Answers
Answer:
True, The Answer is true. Mechanical digestion involves physically breaking the food into smaller pieces.
Answer:
true
Explanation:
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What was the scientific basis for the unit amu
Answers
Which of the following is least likely to change the gene pool of a population of chipmunks?
A pesticide poisons and kills a large number of chipmunks.
A group of chipmunks moves to a new habitat.
A number of chipmunks die due to old age.
A genetic mutation causes some of the chipmunks to have larger eyes.
Answers
Answer:
I would say that old age because nothing is affecting the gene pool by dying of old age.
Explanation:
Hope this helps.
Among the following, one which is least likely to change the gene pool of a population of chipmunks is "A number of chipmunks die due to old age".
What is gene pool?Reference to the combination of all the genes (including alleles) present in a reproducing population or species is called as a gene pool.
Evolution can change the composition of a population's gene pool over time. This can occur by a variety of mechanisms, including mutations, natural selection, and genetic drift. The result is a gene pool that is altered to be attuned to the needs of the population's specific environment.
Given options are-
A pesticide poisons and kills a large number of chipmunks.
A group of chipmunks moves to a new habitat.
A number of chipmunks die due to old age.
A genetic mutation causes some of the chipmunks to have larger eyes.
Therefore, Among the following, one which is least likely to change the gene pool of a population of chipmunks is "A number of chipmunks die due to old age".
To learn more about evolution click:
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2. His_________would take place tomorrow. (bury)
3.His________of words is good. (choose)
4. I received the gift with_______(please)
Answers
Answer:
1. burial
2. Choice
3. pleasure
Explanation:
Mark brainliest! Please!
Ming has two unknown substances. One is nonpolar, and the other is polar.
Which process would most likely help Ming identify which substance is polar and which is nonpolar?
Test the boiling points. The polar substance should have a lower boiling point because of its dipole-dipole forces.
Test for an odor. The nonpolar substance should have a higher volatility and stronger odor because of its London dispersion forces.
Test the boiling points. The nonpolar substance should have a higher boiling point because of its hydrogen bonds.
Test for an odor. The polar substance should have a higher volatility and weaker odor because of its dipole-dipole forces.
Answers
Answer:
Test for an odor. The nonpolar substance should have a higher volatility and stronger odor because of its London dispersion forces.
Explanation:
To help Ming identify the non-polar compound, assuming the non-polar compound will have an odor test for it and most importantly, the non-polar substance should have a higher volatility due to its London dispersion forces.
London dispersion forces are weak attractions found between non-polar molecules and noble gases. They account for the reason why compounds as such are volatileAnswer:
B
Explanation:
I will give brainliest to first person who answers correctly.
What category is the single greatest source (Widespread Forest Fires, Biological Emissions/Cattle, Energy Production, Chemical Waste) of our carbon footprint, and where would we find the largest impact of this footprint?
Answers
Answer:
Energy Production and China
Explanation:
China is the biggest carbon footprint contributior due to the mass manufacturing and buildings they have.
Which one of the following is a pure substance? A. Sea water B. sodium C. smoke and D. Soft drink
Answers
Answer:
B. Sodium
Explanation:
The composition of sea water, smoke, and soft drinks are not consistent, and you can separate the parts that make up each. Sodium has a definite and consistent composition, so it is a pure substance.
A jeweler heats a silver strip and bends it into a bracelet. The jeweler then cools the bracelet. When the strip of silver is heated, the silver particles _____.
Answers
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options. However, when a solid substance is subjected to heat, it's particles will have an increase in kinetic energy which causes the solid to fluidize as it changes state to liquid (or fluid). The same thing can be said about the heating of a silver strip, the silver particles will have an increase in kinetic energy.
It should be noted that the particles of a solid substance generally have very little or no kinetic energy, thus the reason for the compact shape of a solid.
please please please help me ill give brainliest
Answers
Answer: the answer is A.
which of the following could not form an ionic compound? check all that apply
Answers
An ionic bond is formed between a metal ion a nonmetal ion hence Li^+ and Cl^- will form an ionic bond.
An ionic bond is formed between two ions, a metal ion(cation) and a nonmetal ion (anion). The ionic compound is therefore an ion pair because the ions are held together by electrostatic attractions to each other.
Since an ionic bond is formed between a metal ion a nonmetal ion, the following will form an ionic bond;
Li^+ and Cl^-Mg^2+ and S^2-Learn more: https://brainly.com/question/9743981
Assume that a person pouncing a ball represents a closed system. Which
statement best describes how the amounts of the ball's potential and kinetic
energy change?
A. Both the kinetic and potential energy of the ball increase.
B. The ball's kinetic energy increases as it falls and its potential
energy decreases.
C. Both the kinetic and potential energy of the ball decrease.
D. The ball's potential energy decreases as it rises and its kinetic
energy increases.
Answers
Answer:
A b9th the kintectic and potentilal energy change
Answer:
B. The ball's kinetic energy increases as it falls and its potential
energy decreases.
Explanation:
A student with a body temperature of 37°C holds a piece of ice that has a temperature of –8°C.
Which statement best explains what happens?
A.Heat transfers coldness from the ice to the student's hand. B.Heat transfers thermal energy from the student's hand to the ice. C.Thermal energy transfers heat from the student's hand to the ice. D.Thermal energy transfers coldness from the student's hand to the ice.
plzz hurry
Answers
Answer:
B
Explanation:
Heat moves as thermal energy from hot body to a cold body
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Sand sediments are usually more permeable than silt sediments because sand grains are
Answers
Answer:
Larger
Explanation:
4. The nucleus of an atom is positively charged due to
A. electrons b. neutrons C. proton D. Ion
Answers
Answer:
Protons
Explanation:
Electrons have a negative charge which are found in shells around the nucleus. The nucleus consists of protons and neutron and the neutron has a neutral charge.
please i’m like a month behind
Answers
Answer:
the gets rid of waste is decomposer
and organism for is made up of more then one cell
sorry hope it helped you so far and they give you examples
Explanation:
1.)A photon has a wavelength of 1.95 x10^-11 m. What is the frequency?
a.)Using your answer, find the energy of that photon
Answers
Explanation:
Given parameters:
Wavelength of photon = 1.95 x 10⁻¹¹m
Unknown:
Frequency of the wave = ?
Energy of the photon = ?
Solution:
The frequency and wavelength of a wave are related by the expression;
C = Fλ
C = speed of light = 3 x 10⁸m/s
F = frequency
λ = wavelength
Insert the parameters and solve;
3 x 10⁸ = F x 1.95 x 10⁻¹¹
F = [tex]\frac{3 x 10^{8} }{1.95 x 10^{-11} }[/tex] = 1.54 x 10¹⁹Hz
Energy of the photon is related to frequency using the expression below;
E = hF
h is the Planck's constant = 6.634 x 10⁻³⁴m²kg/s
Insert the parameters and solve;
E = 6.634 x 10⁻³⁴ x 1.54 x 10¹⁹ = 1.02 x 10⁻¹⁴J
A 25.00 ml solution containing 0.033 M sodium acetate is titrated with a 0.098 M solution of HCl. How mar
milliliters of HCl are required to reach the endpoint?
Answers
Answer:
[tex]8.42\ \text{mL}[/tex]
Explanation:
When the endpoint is reached the millimoles of sodium acetate and HCl will be equal.
[tex]\text{Volume of sodium acetate}=25\ \text{mL}[/tex]
[tex]\text{Molarity of sodium acetate}=0.033M[/tex]
[tex]\text{Molarity of HCl}=0.098M[/tex]
[tex]\text{Millimoles of sodium acetate}=25\times 0.033=0.825\ \text{mmol}[/tex]
Let [tex]V=\text{Volume of HCl}[/tex]
[tex]\text{Millimoles of HCl}=0.098V[/tex]
At end point the millimoles will be equal to that of sodium acetate
[tex]0.825=0.098V\\\Rightarrow V=\dfrac{0.825}{0.098}\\\Rightarrow V=8.42\ \text{mL}[/tex]
The volume of HCl required is [tex]8.42\ \text{mL}[/tex].
The volume of HCl required to required to reach endpoint is 8.42 mL
From the question,
We are to determine the volume of HCl required to reach endpoint
First, we will write a balanced chemical equation for the reaction.
The balanced chemical equation for the reaction is
CH₃COONa + HCl → CH₃COOH + NaCl
This means
1 mole of sodium acetate is required to completely neutralize 1 mole of HCl
Now, we will determine the number of moles of sodium acetate present
Using the formula
Number of moles = Concentration × Volume
Concentration of sodium acetate = 0.033 M
Volume of sodium acetate = 25.00 mL = 0.025 L
∴ Number of moles of sodium acetate present = 0.033 × 0.025
Number of moles of sodium acetate present = 0.000825 mole
Now,
Since, 1 mole of sodium acetate is required to completely neutralize 1 mole of HCl
Then,
0.000825 mole of sodium acetate would be required to completely neutralize 0.000825 mole of HCl
∴ The number of moles of HCl needed is 0.000825 mole
Now, for the volume of 0.098 M HCl required to reach endpoint
Using the formula
[tex]Volume = \frac{Number\ of\ moles}{Concentration}[/tex]
∴ Volume of HCl required to required to reach endpoint = [tex]\frac{0.000825}{0.098}[/tex]
Volume of HCl required to required to reach endpoint = 0.008418367 L
Volume of HCl required to required to reach endpoint = 8.418367 mL
Volume of HCl required to required to reach endpoint ≅ 8.42 mL
Hence, the volume of HCl required to required to reach endpoint is 8.42 mL
Learn more here: https://brainly.com/question/9698827
If your cannot keep your balance, what bodily structure might be responsible?
A. Ossicles
B. Semicircular canal
C. Hippocampus
D. Occipital lobe
Answers
Answer:
d
Explanation:
