Answers
Answer : The correct option is (b) [tex]1.01\times 10^{24}[/tex]
Explanation : Given,
Mass of cesium = 223 g
Molar mass of cesium = 133 g/mole
First we have to calculate the moles of cesium.
[tex]\text{Moles of cesium}=\frac{\text{Given mass cesium}}{\text{Molar mass cesium}}[/tex]
Now putting all the given values in this formula, we get:
[tex]\text{Moles of cesium}=\frac{223g}{133g/mol}=1.67mol[/tex]
Now we have to calculate the number of atoms of cesium.
As, 1 mole of cesium contains [tex]6.022\times 10^{23}[/tex] atoms of cesium
So, 1.67 mole of cesium contains [tex]1.67\times 6.022\times 10^{23}=1.01\times 10^{24}[/tex] atoms of cesium
Therefore, the number of atoms of cesium are [tex]1.01\times 10^{24}[/tex]
Related Questions
16.30 rounded to the nearest hundredth of a gram
Answers
Answer:
124.586
Explanation:
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
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.
Pls Help asap no rocky
Answers
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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please guys help me with this
Answers
Answer:
It's B.
Explanation:
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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!
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
HELP ASPAP!!!!!!!!PLEASE PLEASE
Answers
Answer:
what do you need help with?
Explanation:
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!!!
will give the brainliest!
plz answer correctly
Answers
Explanation:
a cl chlorine
b NH3 ammonia
c co2 carbon dioxide
d H hydrogen
e o oxygen
Scientists want to eventually collect data from the surface of Venus. Which is a technology that could be used to collect samples and determine if it was habitable? a rover vehicle that can withstand the harsh Venus environment satellites that predict locations for water formation on Venus computer simulations that model the formation of Venus a telescope that records information about the weather patterns on Venus
Answers
Answer:
A:
Explanation:
Because im smart
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.
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
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.
Due in 5 min PLEAZE HELP!!
Answers
Answer:
CO
Explanation:
Co, Cr, and Cu are elements. Elements cannot be broken down by a chemical change, but compounds can. and CO is a compound
Answer:
co
Explanation:
PLEZ HELP QUICKLY!!!! ILL MARK BRAINLIEST
Answers
Option B, P and Cl
They form covalent bond
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
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
Synthetic materials depend on what? I need 3 different answers.
Answers
PLEASE HELP AND THANKS
Answers
Answer:
torque =force*distance
HELLLLLLPPPPPP ME NOW I WILL GIVE YA THE BRAINLIEST ANSWER WHOEVER ANSWERS FIRSTTTTTTT
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.
P2O5 is a covalent compound used to purify sugar. How many atoms of phosphorus does this compound have? How many atoms of oxygen does this compound have?
Lol please help :')
Answers
Answer:Phosphorus: 2
Oxygen:5
Explanation:
Just did it
Answer:
Phosphorus: 2
Oxygen:5
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:
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 ☺️☺️
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 form of
energy that
refers to the
motion of
particles
Answers
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!!!
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?
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
Dissolving salt in fresh water to make salt water is Chemical or Physicals
Answers
Answer:
chemical
Explanation:
i did that stuff in 5th grade