Answer:
Number of moles = 0.5 mol
3.011 ×10²³ atoms
Explanation:
Given data:
Mass of sulfur = 16 g
Number of moles = ?
Number of atoms = ?
Solution:
Number of moles of S:
Number of moles = mass/molar mass
Number of moles = 16 g/ 32 g/mol
Number of moles = 0.5 mol
Number of atoms:
1 mole contain 6.022×10²³ atoms
0.5 mol × 6.022×10²³ atoms / 1 mol
3.011 ×10²³ atoms
What is the strength of Ammonium lauryl sulfate?
Answer:
283.43 g/mol
Explanation:
Two knots is equal to:
Answer:
2.30156
Explanation:
Answer:
2.30156
Explanation:
becuase one knot is equivalent to 1.15078, two knots is equivalent to 2.30156
5. (03.01 LC)
Which of the following is matter in its liquid form?(2 points)
Animals
Plants
Rain
Sunlight
Answer:
rain
Explanation:
rain drops are water and water us a liquid
A sample of metal is heated until it melts and begins to glow red. When it cools, it appears the same color as it did before it was heated. This is evidence that a chemical reaction occurred. is it true or false
Answer:
Explanation:
trueeeeeeeeeeeeeeeeeeeeeeeeeee
What is an atom? Is it stable? Give reasons to support your answer.
Acceleration due to gravity on the moon is greater / less than acceleration due to gravity on Earth. The mass of an object on the moon is less than / greater than / the same as it is on Earth. Using the equation F = ma to calculate weight, the mass of an object is multiplied / divided by acceleration due to gravity. So, the weight of an object on the moon is greater / less than the weight of the same object on Earth.
balance these equations
Answer:
2 Pb(NO3)2 = 2 PbO + 4 NO2 + O2
2 KNO3 = 2 KNO2 + O2
4 Al + 3 O2 = 2 Al2O3
60KI + 3H20 + 40O3 → 60KOH + 30I2 + 30O2
2 FeCl3 + SO2 + 2 H2O = 2 FeCl2 + 2 HCl + H2SO4
Check if its right
Explanation:
2Pb(NO3)2=2PbO+4NO2+ O2
4KNO3=4KNO2+2O2
8AL+6O2=4AL2O3...
I tried ....
The "dots" in a electron dot structure (Lewis Dot) represent the following:
Valence electrons, the electrons that are in a noble gas.
Valence electrons, all the electrons that surround the nucleus of an atom
The group numbers 1A thru 8A
Valence electrons, the outer most electrons used in bonding
Answer:
the statement is true.....
When you dissolve an antacid tablet in water and it produces bubbles, what kind of change is this?
A. a physical change
B. a chemical change
C. a solution change
Answer: B. a chemical change
Explanation:
How could sinking a ship to create an artificial reef address the problem?
A.
More divers would come to the area to explore both reefs.
B.
Many divers would go to the artificial reef instead of the natural reef.
C.
There would be more places for new species to enter the ecosystem.
D.
There would be fewer places for marine organisms to live.
Answer:
C. There would be more places for new species to enter the ecosystem.
Explanation:
The Shipwrecks established artificial reefs that address the problem of a natural reef.
The artificial reefs provide a stable growing area for corals, and habitat for fishes and new organisms along with food sources that is found in natural reefs. This helps to increase the growth of marine life.
Hence, the correct answer is "C. There would be more places for new species to enter the ecosystem."
what is dilution?..............
Answer:
di·lu·tion
the action of making a liquid more dilute.
"the milk factor is greatly reduced by dilution"
NEED THIS NEED TO GET OFF ITS MY BRO BDAY NEED IT FOR A BIG GRADE NEed it SO BAD
Answer:
he is right, top right
Explanation:
HELP PLEASE!!!!!
An experiment calls for each student to use 3.50 g of sodium hydroxide.
There is only 78.2 g of sodium hydroxide remaining. How many students An experiment calls for each student to use 3.50 g of sodium hydroxide.
There is only 78.2 g of sodium hydroxide remaining. How many students
can complete the experiment?
Select one:
a. 22 students
b. 0 students
c. 78 students
d. 273 students
Answer:
22 students
Explanation:
i just answered it for a quiz and its correct
Define compound in your own words
Answer:
I think the compound is a chemical bound the compound o cant say I trying
Explanation:
oh the compound is a chemical substance like atoms like H2O and other atoms they have many compounds I think this should be ans
if its ans is too long you want then tell me in comment
I NEED HELP !!! PLEASE I AM TIMED !! :(( Will mark brainliest i need the right answer these finals killing me... especially chem
Answer:
its d
Explanation:
Answer: it is D
step by step
why is an atom electrically neutral
Question 3
When an electron absorbs energy and jumps it is:
a negative ion
in the ground state
a positive ion
in the excited state
Help please
Answer:
in the excited state
Explanation:
Because in excited state an atom has more energy
Symptoms of a mental disorder are ways of
unusual.
feeling, or acting that are
A. thinking
B. sleeping
C. working
D. imaging
Answer: thinking
Explanation:
A mental disorder are ways of unusual feeling, or acting that are thinking. Therefore, option A is correct.
What is mental disorder ?A clinically significant impairment in a person's intellect, emotional control, or behavior is what is known as a mental disorder. It is typically linked to distress or functional impairment in key areas.
Mental illness has many causes, not just one. Your genes and family history are only two examples of the many variables that can increase your risk for mental illness. Your life experiences, particularly if they occurred as a youngster, such as stress or a history of abuse.
Depression is the most prevalent mental condition, affecting an estimated 300 million individuals, and often affects women more frequently than males.
Thus, option A is correct.
To learn more about mental disorder, follow the link;
https://brainly.com/question/939408
#SPJ2
A student measures the time it takes for two reactions to be completed.
Reaction A is completed in 12 seconds, and reaction B is completed in 21
seconds. What can you conclude about the rates of these reactions?
A. The rates of reactions A and B are equal.
B. The rate of reaction A is lower.
C. The rate of reaction B is lower.
Answer:
c
Explanation:
because the left side of reactant is take more time to make a product than the first
The rate of these reactions should be considered as the option b. The rate of reaction A is lower.
Conclusion of the rate of reactions:Since Reaction A is completed in 12 seconds, and reaction B is completed in 21 seconds.
So based on this, we can say that the rate of reaction A should be lower as it contain 12 seconds as compared to reaction b.
hence, the option b is correct.
Learn more about reaction here: https://brainly.com/question/4241156
How many elements are in Na2CO3?
Answer:
3 i believe
Explanation:
Answer: 3
Explanation: I took the test!!!
The number of protons and neutrons combined in an atom of a particular element
Your mother gives you 250 mg of acetaminophen and a cup containing 500 ml of water. What is the concentration of the solution if you dissolve the Tylenol in the water?
Answer:
The concentration is 50%
Explanation:
Mass-Volume concentration is molarity (M) times 100% or [tex]\frac{Gsolute}{Lsoln}[/tex] * 100%
For this problem, we need to convert from milligrams to grams and milliliters to liters in order to plug the values into the equation and solve for the concentration.
So, 250 mg = 0.025g (there are 1000 mg in 1 g)
And 500ml = 0.05 L (there are 1000 ml in 1 L)
Now we can solve for the concentration
[tex]\frac{0.025 g}{0.05 L}[/tex] [tex]* 100[/tex] %= 0.5 [tex]* 100[/tex] % = 50% of Tylenol concentration
The energy levels of an atom are occupied by
A.electrons
B.protons
C.neutrons
D.ions
Answer:
A: electrons
Explanation:
Is it a model answer key
Answer:
is what a model answer key
I am going to go with yes. Imao
Atoms acquire the stability of a noble gas by losing electrons
Answer:Atoms acquire the stable electron structure of a noble gas by losing electrons. An atom of an element in Group 1A has seven valence electrons. Among Group 1A and 2A elements, the group number is equal to the number of valence electrons in an atom of that element.
Explanation: Hope this help have an wonderful day and stay safe! :D
Methane gas combusts according to the following
chemical equation:
CH4 (8) + 202(g) → CO2(g) + 2H2O(l)
29.2 L of methane gas is combusted with 63.3 L of
oxygen gas at STP. What volume of carbon dioxide
is produced in the reaction?
___L CO2
Your answer should be rounded to three significant figures. Do
not include units in your answer.
The volume of Carbon dioxide : 29.12 L
Further explanationGiven
ReactionCH4 (g) + 202(g) → CO2(g) + 2H2O(g)
Oxygen volume = 63.3 L
Methane volume = 29.2 L
RequiredThe volume of Carbon dioxide
Solution
1 mol gas at STP = 22.4 L
mol methane :
[tex]\tt \dfrac{29.2}{22.4}=1.3[/tex]
mol oxygen :
[tex]\tt \dfrac{63.3}{22.4}=2.83[/tex]
limiting reactant : CH₄(smaller ratio:mol/reaction coefficient)
So mol CO₂ based on CH₄
From equation, CO₂ : CH₄ = 1 : 1, so mol CO₂ = 1.3
The volume =
[tex]\tt 1.3\times 22.4=29.12~L[/tex]
The volume of carbon dioxide is produced in the reaction is 29.12 L
The calculation is as follows:We know that
1 mol gas at STP = 22.4 L
So,
The mol methane is
[tex]= 29.2 \div 22.4\\\\= 1.3[/tex]
Now
The mol oxygen is
[tex]= 63.3 \div 22.4\\\\= 2.83[/tex]
Now the volume is
[tex]= 22.4 \times 1.3[/tex]
= 29.12 L
Learn more: https://brainly.com/question/5763151?referrer=searchResults
162.4 NH3 =____mol NH3
Answer:
162.4
Explanation:
Because yea thats the answer no need to tell you why ok bye
Can someone help me with this question please? I don’t understand molarity
Answer:
4.7L
Explanation:
Why do rats like cheese? <>-<> Im freaking out here dudes
Answer:
because its yellow
Explanation:
because rats like yellow
Question 8 of 10 Which wave property is related to the pitch of a sound? A. Crest height B. Frequency O C. Amplitude D. Rest position
Answer:
frequency
Explanation:
i took the test