Answers
Answer:
First we know that the molar mass of CO2 is 44.01g/mol, and that the sample of CO2 contains 3.408 x 10^21 molecules, and we have to find the mass of that sample.
We know that moles = mass/molar mass, if we rearrange the equation for mass, we'll get:
mass = moles x molar mass
Also, note that the number of atoms/molecules in a sample is the moles of the sample x Avogadro's number (6.02 x 10^23)
If we rearrange the equation for moles, we would get:
moles = molecules of sample/6.02 x 10^23
Plug in the values for the equation above to get the moles:
moles = (3.408 x 10^21)/(6.02 x 10^23)
moles = 0.00566112956 (we're not done yet)
Now that we have the moles and we were already provided the molar mass, we can calculate the mass using the very first equation we rearranged.
mass = moles x molar mass
mass = 0.00566112956 x 44.01
mass = 0.2491g (answered 4 places past the decimal point)
Therefore the sample of Carbon Dioxide has a mass of 0.2491g
Related Questions
periodicity in chemical properties is based on atomic structure." explain.
Answers
Answer:
Periodicity is caused by regular and predictable variations in element atomic structure. ... The rows in the periodic table (the periods) reflect the filling of electrons shells around the nucleus, so when a new row begins, the elements stack on top of each other with similar please help me rank up
Periodicity means the repeating trends in properties of elements in a regular interval. Precocity in chemical properties depends on the atomic structure because, the size, number of electrons, etc affects their reactivity.
What is periodicity?Periodicity is the repetition in in trends in properties after a regular interval. In periodic table, all the elements are classified into different groups and periods.
Groups are vertical columns containing elements of same number of valence electrons and similar chemical and physical properties. Periods are horizontal rows where elements are arranges in the increasing order of atomic number.
Along a period the atomic size decreases, ionization energy and electronegativity increases. But down a group just the reverse for this happens.
In a chemical reaction only valence electrons are participating and the size and number of valence electrons etc affects the chemical reactivity of elements. That's why it is said like periodicity in chemical properties is based on the atomic structure.
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when would a scientist choose to conduct a controlled experiment
Answers
Answer:a scientist would choose to conduct a controlled experiment when it has all the necessary precautions and has the equipment to do so
Explanation:thank you
Plz mark for brainlist
if atomic mass of Mg atom is 24g,find the mass of 1 Mg atom
Answers
Answer:
4×10^-23g
Explanation:
Given atomic mass of Mg = 24g
To find mass of 1Mg = ?
So its fix that the atomic mass of Mg 24 g is 6.022×10^23
Then the Atomic mass of 1 Mg atom is = 24 ÷ 6.022×10^23
= 4×10^-23 g
please help me...
1. oak
2. catrpiller
3. Blue jay
Answers
Answer:
[tex]\left[\begin{array}{cc}Oak\ Leaves&Decrease\\Caterpillar&Decrease\\Blue\ Jay&Decrease\end{array}\right][/tex]
Because the fungus is killing the oak leaves, the caterpillars will have less food and die out, resulting in a decrease in blue jay populations.
Hope it helps :) and let me know if you want me to elaborate.
how many seconds are there in 15 hours show work
Answers
Answer:
54,000 seconds
Explanation:
seconds in 1 hr = 3600
secs in 15 hrs = 3600×15
→ 54000
the sequence of stages an organisms go through from one generation to the next lace where an organism lives is called in
Answers
Answer:
A life cycle is the sequence of stages an organisms goes through from one generation to the next. Organisms that reproduce sexually can have different types of life cycles, such as haploid or diploid life cycles.
What is always true about lenses?
Answers
Answer: They all bend light.
i don't know much about lenses so i hope this helps! :)
Can someone label these PLEASE !!! HELPPPPPP! DUE TODAYY
Answers
Answer:
1. melting
2boiling
3. freezing
4. condesation
Explanation:
Why are naphthalene ball used to protect clothes from insects? How does it gradually decrease and ultimately disappear?
Answers
4 Mg & 3 Cu(NO3)2 + Cu(NO3)2 (aq) + Mg(NO3)2 (aq) + Cu (s)
balance?
Answers
Here you go
Mg + 2CuNO3 → Mg(NO3)2 + 2Cu
Draw and Name the Cis- isomer for the following compound:
CH3 - CH = CH - CH2 - CH3
Answers
Answer:
Cis-2-pentene or Z-2-pentene
NEED ASAP THANK YOU!
Answers
Answer:
d. 10
Explanation:
The 24 means the atomic mass and twelve means the number of electrons. You subtract the number of electrons from the atomic mass. 24-12=12
Then, since there's +2, you subtract 2 from 12 which equals 10 which means there are 10 electrons now.
The confusing thing is that + means subtract and - means add here.
Hope this helps.
what is the name of CrO2?
Answers
about distillation methods
Answers
Answer:
Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Dry distillation is the heating of solid materials to produce gaseous products
Answer:
Explanation:
Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Dry distillation is the heating of solid materials to produce gaseous products.
Question 1
Of the following which displays a positive energetic process?
Answers
We can describe a positive energetic process as any process which increases the internal energy of the system.
A positive energetic reaction or process is often referred to as being Endothermic. This means that the system which is performing the process absorbs energy. Some examples include:
Boiling an EggRoasting food over a fire (the food is the reference system)etc
Therefore, we can confirm that a positive energetic process is one in which the system in question absorbs energy, thus increasing its internal energy.
Since I could not locate the options online, I have provided a general explanation of the concept coupled with a few examples.
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Essential Question: How is the scientific method used to answer questions?
Answers
Which of the following best describes the arrangement of particles in a gas?
O The particles are spread apart and can move freely.
O The particles are packed closely together and can move freely.
O The particles are packed closely together and cannot move freely
O The particles are spread apart and cannot move freely.
Answers
Answer: The particles are spread apart and can move freely.
Complete the balanced dissociation equation Cs2CO3
Answers
The balanced dissociation equation for Cs₂CO₃ is:
Cs₂CO₃(aq) —> Cs⁺(aq) + CO₃²¯(aq)
A dissociation equation is an equation showing the available ions present in a solution.
To obtain the dissociation equation, the compound must be dissolved in water to produce an aqueous solution.
The dissociation equation for Cs₂CO₃ can be written as follow
Cs₂CO₃(aq) —> Cs⁺(aq) + CO₃²¯(aq)
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NEED HELP ASAP WILL GIVE BRAINLIEST
Answers
Answer:
0.2491
Explanation:
1mole of a gas contains 6.02 × 10²³molecules
x moles will contain 3.408 × 10²¹
x = 1 × 3.408 × 10²¹/ 6.02 × 10²³
= 5.66 × 10^-3moles
Mole = mass/ molar mass
mass = Mole × molar mass
= 5.66 × 10^-3 × 44.01
= 249.0966 × 10^-3
= 0.2490966
to 4 decimal places = 0.2491
A car hits a bug with a force of 100N. With how much force does the bug hit the car?
(A). 10 N
(B). 100 N
(C). 1000 N
Answers
Answer:
B
Explanation:
actin and reaction force are equal Newton 3 law
Giúp mình 2 câu này với ạ
1, Pha 500ml dung dịch HCl 10% (w/v) từ dung dịch 37% (w/w) d=1.19 g/ml
2, Cách pha như thế nào để nhận được 200g dung dịch HCl 25% (w/w) từ dung dịch HCL 37% (d=1.19 g/ml)
Answers
Answer:it is wrong answer
Explanation:estro man
Complete the passage about ionic structures using words from the list
Answers
Answer:
see below
Explanation:
1- lattice
2- regular
3- positive
4- negative
5- alternate
6- strong
7- bonds
8- giant
50 PTS!!!!! Please answer without links!
What type of chemical reaction happens with Aerobic Cellular Respiration?
Synthesis, decomposition, single displacement, double displacement, or combustion.
Answers
"Aqueous barium chloride reacts with aqueous sodium sulfate
to produce solid barium sulfate and aqueous sodium chloride."
Which chemical equation correctly translates the description
above?
Answers
Answer:
u should go to gathmath
Explanation:
it's alot better
Of the following, ________ is the most volatile. Select one: C2F6 C2H6 C2I6 C2Cl6 C2Br6
Answers
Answer:
C2Br6
because bromine is a liquid volatile
According to the forces of attraction and boiling point C₂Br₆ is most volatile as its boiling point is very low.
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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What is the mass percent of nitrogen in:
1. N2O
2. NO
3. NO2
4. N2O2
Answers
For the percent by mass N, we’re going to rewrite the equation as:
98% (271 ratings)
View Complete Written Solution
Problem Details
Calculate the mass percent composition of nitrogen in each nitrogen-containing compound:
c. NO2
30 points!!!!
2K + 2H2O → 2KOH + H2
This reaction shows which detail about potassium and hydrogen?
Hydrogen is more reactive than potassium.
Potassium and hydrogen form ionic bonds.
Potassium is more reactive than hydrogen.
Potassium and hydrogen form covalent bonds
Answers
Answer:
2K + 2H2O → 2KOH + H2
So Hydrogen is more reactive than pottasium .
According to law of conservation of matter, 2 moles of potassium react with water to produce 1 mole of hydrogen gas.So, 2 moles of potassium produce 1 mole of hydrogen gas.Answer:
A
Explanation:
Hydrogen is more reactive than potassium.
When 2.0 mol of methanol is dissolved in 45 grams of water, what is the mole fraction of methanol
Answers
The mole fraction of methanol in the mixture is 0.444
We'll begin by calculating the number of mole of water.
Mass of water = 45 gMolar mass of water = 18 g/molMole of water =?Mole = mass / molar mass
Mole of water = 45 / 18
Mole of water = 2.5 moles
Finally, we shall determine the mole fraction of methanol.
Mole of water = 2.5 molesMole of methanol = 2 molesTotal mole = 2 + 2.5 = 4.5 molesMole fraction of methanol =?
Mole fraction = mole / total mole
Mole fraction of methanol = 2 / 4.5
Mole fraction of methanol = 0.444
Thus, the mole fraction of methanol is 0.444
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After you have analyzed the data from an experiment, what do you do? O A. Draw a conclusion a O B. Control the variables C. Make a hypothesis D. Identify the variables
Answers
Answer:
A. Draw a conclusion
Explanation:
correct me if I'm wrong :>
The Planet Venus is surrounded by a thick layer of gases. In fact the atmospheric preassure on Venus is over 90 times grater than the atmospheric preassure on Earth. Wcich statements are true about boiling water on Venus? Choose the TWO STATEMENTS that aply.
A. Water will boil at a higher temperature on Venus than on Earth.
B. Water will boil at a lower temperature on Venus than on Earth.
C. The temperature of the water will remain constant as it boils.
D. The temperature will increase as it boils.
Answers
Explanation:
Because temperature and pressure are directly proportional... increase in pressure will increase in the atmospheric temperature.... Venus has higher pressure than earth that also means it has higher atmospheric temperature and as the temperature is already high the water will require lesser heat to boil