Answers
Answer:
Average atomic mass of Cl = 35.48 amu
Average atomic mass of B = 10.8 amu
Average atomic mass of Ag = 107.96 amu
Explanation:
1)
Given data:
Abundance of Cl-35 = 75.8%
Abundance of Cl-37 = 24.2%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (75.8×35)+(24.2×37) /100
Average atomic mass = 2653 + 895.4 / 100
Average atomic mass = 3548.4 / 100
Average atomic mass = 35.48 amu
2)
Given data:
Abundance of B-10 = 19.8%
Abundance of B-11 = 80.2%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (19.8×10)+(80.2×11) /100
Average atomic mass = 198 +882.2 / 100
Average atomic mass = 1080.2 / 100
Average atomic mass = 10.8 amu
3)
Given data:
Abundance of Ag-107 = 52%
Abundance of Ag-109 = 48%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (52×107)+(48×109) /100
Average atomic mass = 5564 +5232 / 100
Average atomic mass = 10796 / 100
Average atomic mass = 107.96 amu
Related Questions
I REALLY NEED THIS!!!! FOR MY STUDY GUIDE!!! MY QUIZ IS TOMORROW!!!!!!
How many electrons, protons, and neutrons are contained in each atom?
a. 132/55 Cs
b. 59/27 Co
c. 163/69 Tm
d. 70/30 Zn
Answers
The second is atomic number, this is the number of protons-this number will never vary or change within that element because the number of protons is what makes an element that element
So to find the number of neutrons, you subtract the second number from the first.
The number of electrons is the same as the number of protons unless there is an additional charge which none of these have
A) neutrons: 132-55=77 neutrons
Protons:55
Electrons: 55
B)n: 59-27=32
27p
27e
C)163-69=94
69p
69e
D)70-30=40 n
30p
30e
Hope that helped!
Calculate the density of the items below. (D = M/V)
1) M = 15g V = 5.0ml *
Answers
Answer:
The answer is 3.0 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 15 g
volume = 5 mL
We have
[tex]density = \frac{15}{5} \\ [/tex]
We have the final answer as
3.0 g/mLHope this helps you
HELP! PLZZ! NEED THIS DONE ASAP!
Answers
Answer:
B)
Explanation:
please guys help me with this
Answers
Answer:
It's B.
Explanation:
How can we write a chemical reaction that explains what happens during a chemical change?
Answers
Answer: When we represent a chemical reaction in terms of words, we write a word equation. For example, when hydrogen gas reacts with oxygen gas to form water, we can write a word equation for the reaction as follows: hydrogen + oxygen→ water To the left of the arrow, we have the 'before' situation.
Explanation:
Pls Help asap no rocky
Answers
PLEASE HELP ME IMPORTANT
Answers
i would try B
Glucose is an example of which Carbon-based macromolecule?
proteins
carbohydrates
lipids
nucleic acids
Answers
Answer:
Monosaccharides are the most basic units of carbohydrates. These are simple sugars, including glucose, fructose, and others. They contain between three and seven carbon atoms, have a sweet taste and are used by the body for energy.
PLEASE HELP AND THANKS
Answers
Answer:
torque =force*distance
PLEZ HELP QUICKLY!!!! ILL MARK BRAINLIEST
Answers
Option B, P and Cl
They form covalent bond
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Which molecule has more atoms, water or acetone?
Answers
Answer:
I think acetone has more because water is just H20
Answer:
Acetone
Explanation:
Acetone has three carbon atoms, six hydrogen atoms, and one oxygen atom.
When water has an oxygen atom and two hydrogen atoms.
Question 9/10
As a boulder rolls from the top of a hill to the bottom, how does its potential and kinetic energy change?
A. Potential and kinetic energy both increase.
B. Potential increases and kinetic decreases.
C. Potential decreases and kinetic increases.
D. Potential and kinetic energy both decrease.
please help quickly
Answers
c. Potential decreases and kinetic increases.
Explanation:
As the boulder is rolling down the hill, potential energy decreases as kinetic energy increases.
1. Clouds form when water changes from a
A gas to liquid .
B liquid to gas.
C solid to gas
D solid to liquid.
Answers
this is because water is a liquid to begin with, and then changes to a gas hence it being a cloud
Answer:
A. Gas to liquidExplanation:
I think the answer is A. gas to liquid. This is the correct answer... If you like this answer mark this answer as BRAINLIEST answer..Thank you ☺️☺️
Dissolving salt in fresh water to make salt water is Chemical or Physicals
Answers
Answer:
chemical
Explanation:
i did that stuff in 5th grade
An atom contains 16 protons, 18 neutrons, and 16 electrons what is its mass number?
Name the element of which this is an isotope.
Answers
16
protons
18
neutrons
16
electrons
Right from the start, you know that you're indeed dealing with a neutral atom, since the number of protons it has in its nucleus is equal to the number of electrons it has surrounding its nucleus.
Now, an atom's atomic number,
Z
, tells you how many protons it has in its nucleus. Nothing more, nothing less.
In your case, you are told that the atom contains
16
protons in its nucleus, which means that
Z
will be equal to
Z
=
16
A quick look in the periodic table will reveal that you're dealing with an atom of sulfur,
S
.
An atom's mass number,
A
, tells you how many protons and neutrons it contains in its nucleus. Since the number of protons is given by
Z
, you can say that
A
=
Z
+
no. of neutrons
In your case, the atom contains
18
neutrons in its nucleus. This means that
A
will be equal to
A
=
16
+
18
=
34
Finally, focus on the atom's electron configuration, which you know that must account for a total of
16
electrons.
S:
1
s
2
2
s
2
2
p
6
3
s
2
3
p
4
Its noble gas shorthand notation, which uses the electron configuration of neon,
Ne
, the noble gas that comes before sulfur in the periodic table, will look like this
S:
[
Ne
]
3
s
2
3
p
4
Please help.. This is not a test.. It’s a Naked egg experiment.. please help
Answers
Answer:
Is there a question you need help with?
23. A 54-gram sample of an unknown material has a volume equal to 20 cm'. Based on its density,
could the sample be aluminum? Explain.
Answers
Answer:
The given sample is aluminum.
Explanation:
Given data:
Mass of unknown sample = 54 g
Volume of given sample = 20cm³
Is sample is Al = ?
Solution:
In order to solve this problem we must know the density of Al from literature.
density of Al = 2.7 g/cm³
Now we will calculate the density of given unknown sample.
d = m/v
d = 54 g/ 20cm³
d = 2.7 g/cm³
Thus given sample is aluminum.
Mention 5 uses of methane
Answers
Answer:
Used as rocket fuel, is a fertilizer ingredient, used in cooking, used to provide lighting, and used in production of other compounds
Explanation:
Hope this helps!!!
How many centimeters are in 1 inch?
Answers
The metric system is used to measure the objects based on various parameters. A centimeter is a unit of length. One inch is equivalent to 2.54 cms.
What is the metric system?The Metric system is the system used to estimate the weight (mass), length, and capacity of the object and was first introduced in France by Gabriel Mouton, a mathematician, and an astronomer. The metric system measures length, mass, volume, time, etc.
The metric system of length use the SI unit of meter, other units used to measure the length are centimeter, kilometer, millimeter, inches, yard, mile, feet, etc.
Given,
Length = 1 inch
It is known that an inch is equivalent to 2.54 centimeters, hence, 1 cm = 2.54 cms.
Therefore, there are 2.54 centimeters in one inch of the object.
Learn more about metric conversion here:
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Name the gas being described in each of the following cases.
a) A green gas that bleaches damp litmus paper
b) A gas that dissolves readily in water to produce a solution
with a pH of about 11.
c) A gas that produces a white precipitate with calcium
hydroxide solution
d) A gas that pops when a lighted splint is placed in it.
e) A gas that relights a glowing splint.
Urgent!!!
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plz answer correctly
Answers
Explanation:
a cl chlorine
b NH3 ammonia
c co2 carbon dioxide
d H hydrogen
e o oxygen
how long does it take for stirring and heat to dissolve in water?
Answers
Answer:
5-20 mins
Explanation:
How are u supposed to tell how many neutrons and electrons an element has?? Pls help if u know the answer.
Answers
Answer:
Explanation:
The atomic number (number at the top) is the amount of protons and the amount of electrons. So if an element has an atomic number of 5, you know that it has 5 protons and 5 electrons. The atomic mass (number at the bottom) is the amount of protons and neutrons added together.
how many moles are in 500 g of copper
Answers
Perform each of the following operations as indicated. Express your answers to the correct number of significant figures and unit.
1. 5 x 10–7 kg + 3 x 10–7 kg
2. 4 x 105 kg + 6 x 105 kg
3. 1.66 x 1019 kg + 2.30 x 1019 kg
4. 7.2 x 10–12 kg - 2.6 10–12 kg
5. 3.8 x 10–12 m2 - 1.90 x 10–11 m2
6. 2.26 x 10–18 m2 - 1.8 x 10–18 m2
Answers
2. 1000 with 1 sig fig
3. 4040 with 3 sig fig
4. I’m not certain if that second part is 2.6X10-12 but if so, the answer is 20 with 1 sig fig
What is the mass of an object with a density of 80 g/mL and a volume of 8.5 mL?
Answers
Answer:
The answer is 680 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 8.5 mL
density = 80 g/mL
We have
mass = 80 × 8.5
We have the final answer as
680 gHope this helps you
HELP ASPAP!!!!!!!!PLEASE PLEASE
Answers
Answer:
what do you need help with?
Explanation:
I think I'm allergic to garlic powder. Tonight I am making pasta and will not use garlic powder this time. If I get itchy or not is what kind of variable?
Answers
Answer:
Explanation:
A garlic allergy is rare. If you're allergic to garlic, you can be allergic to cooked or raw garlic, or to all forms. A garlic allergy is caused when your body's immune system mistakenly identifies garlic as being harmful and produces antibodies in an attempt to fight it off. Does this help?
Answer
Dependent
Explanation:
You will react depending on the presence of garlic powder
Why are black holes so difficult to detect?
Answers
Answer:
Black holes are so dense that light cannot escape from them, and they are difficult to detect. Satellites above the Earth's atmosphere can detect bursts of high energy radiation given off by black holes. Dozens of stellar black holes have already been detected in the Milky Way, where there may be tens of millions more.
Explanation:
What is the smallest packet of electromagnetic energy that can be absorbed or emitted?
a proton
an electron
a photon
a wave
Answers
Answer:
C on edge
Explanation:
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The smallest packet of electromagnetic energy that can be absorbed or emitted is photon.
What is electromagnetic energy?Radiation that travels in waves and has both electric and magnetic fields. It is derived from both natural and artificial sources. The power of electromagnetic energy can range from low to high.
Proton and electron are particles not any form of energy.Wave is a form of radiation.Photon is a small packets of energy whose energy is equal to hυ.Hence photon is the smallest packet of electromagnetic energy.
To know more about photons, visit the below link:
https://brainly.com/question/15946945
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A fluoride ion (F) has the same electron configuration as
A. Na+
B.Na
C.Cl-
D.Cl
Answers
Answer:
Option A. Na⁺
Explanation:
Floride ion (F¯) simply indicates that the fluorine atom has gain an extra electron.
Thus, the electronic configuration of the fluoride ion (F¯) can be written as follow:
F¯ (10) => 1s² 2s²2p⁶
Next, we shall determine the electronic configuration of the element given in options to see which is the same as that of the fluoride ion (F¯). This is illustrated below:
Na⁺ (10) => 1s² 2s²2p⁶
Na (11) => 1s² 2s²2p⁶ 3s¹
Cl (17) => 1s² 2s²2p⁶ 3s²3p⁵
Cl¯ (18) => 1s² 2s²2p⁶ 3s²3p⁶
From the above illustrations, we can see that the fluoride ion (F¯) has the same electronic configuration as Na⁺.
Each element is made up of electrons and these electrons are filled in different shells. These are the following shells in the electrons:
K shellL shellM shellN shellAccording to the question, the fluoride ion has 10 electrons in its 2 shells, that is 2 in K shell and 8 in L shell.
A similar number of shell and electrons to the fluoride ion is sodium ion ([tex]Na^{+}[/tex])
The [tex]Na^+[/tex]has a total 10 number of electrons, hence the electronic configuration is 2 and 8.
Therefore, the [tex]Na^+[/tex] is the correct option.
For more information, refer to the link:-
https://brainly.com/question/21940070