Answer
:just switch the first ones around
Explanation:
i d0nt know how to explain sorry
how many atoms are present in 14 g of iron
Answer:
1.51 × 10²³ atoms
Explanation:
First, we convert 14g of iron (Fe) to moles using the formula below:
mole = mass ÷ molar mass
Molar mass of Fe = 55.85g/mol
mole = 14g ÷ 55.85g/mol
mole = 0.251mol
The number of atoms in 0.251 mol of Fe is calculated as follows:
number of atoms = n × nA
Where;
n = number of moles
nA = Avagadros number (6.02 × 10²³)
number of atoms = 0.251 × 6.02 × 10²³
number of atoms = 1.51 × 10²³ atoms.
If your end product is 200.0 g KMnO4 how much KOH did you start with?
Answer:
[tex]m_{KOH}= 142.0gKOH[/tex]
Explanation:
Hello there!
In this case, according to the following chemical reaction we found on goo gle as it was not given:
[tex]2MnO_2+4KOH+O_2\rightarrow 2KMnO4+2KOH+H_2[/tex]
Whereas we can see a 2:4 mole ratio of potassium permanganate product to potassium hydroxide reactant with molar masses of 158.03 g/mol and 54.11 g/mol respectively. In such a way, by developing the following stoichiometric setup, we obtain the mass of KOH to start with:
[tex]m_{KOH}=200.0gKMnO_4*\frac{1molKMnO_4}{158.03gKMnO_4}*\frac{4molKOH}{2molKMnO_4} *\frac{56.11gKOH}{1molKOH}\\\\m_{KOH}= 142.0gKOH[/tex]
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6)
Which formula can represent
an
alkyne?
A)
C₃H6
B)
C₂H4
C)
C3H4
D)
C₂H6
Answer:
c)C3H4
Explanation:
Answer: C. C3H4
Explanation:
I got it wrong and castle learning showed me the answer
The solid dissolves quickly is a chemical or physical reaction
Answer:
i think it is chemical wait no physical
Explanation:
calculate the mass in 0.0040 moles of potassium permanganate
How many nitrogen atoms are in 4AgNO3
Answer:
Silver/AG= 4
Nitrogen/N=4
Oxygen/O=12
Explanation:
TH
What is T2 in Kelvin?
178K
204K
0 299K
451K
Answer:
none.
Explanation:
if we are not given any value as temperature in the question. and we were asked to calculate the T1, then our T2 will be 273k.
PPPPPPPPLLLLLLLLLLLLLLZZZZZZZZZZ HELP ME ITS ALREDY OVER DUE PLZ HELP ME PPPLLLZZZ I NEED IT IM DESPRET
Answer:
1) Big Bang Theory
2) we are in a phase of the big bang theory
Explanation:
So for number 1 the answer is the -big bang theory- and number 2 there is a theory that pretty much says that were in a constant cycle. what I mean is theoretically in a couple million years the entire universe will form together again into another dense ball and repeat the process. So basically the universe is still in the "expanding phase" and that's what backs up the theory of the big bang (the fact that were in one of the big bang theory's "phases")
As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution?
A) Decreases
B) Increases
C) Remains the same
B) increasesAnswer:
Explanation:
As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution increases. Therefore, the correct option is option B.
What is mole?The World System representing Units (SI) uses a mole (symbol mol) as the unit of material amount. How many fundamental entities of a particular substance are present in an object and sample is determined by the quantity of that material. An elementary entity can be a single atom, a molecule, a pair of ions, an ion pair, even a subatomic particle like a proton depending on the makeup of the substance.
For instance, although having differing volumes and masses, ten molecules of liquid (a chemical compound) because 10 moles of mercurial (a chemical element) both have the same quantity of substance, because the mercury has exactly one atom every every molecular structure of the water. As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution.
Therefore, the correct option is option B.
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On the basis of electronegativity differences between atoms, which of the following scientific claims is the most accurate regarding the bonding in Mg(NO3)2(8) ?
A) There is polar covalent bonding between Mg atoms and N atoms.
B) There is polar covalent bonding between Mg atoms and O atoms.
C) There is ionic bonding between N5+ ions and O2- ions.
D) There is ionic bonding between Mg2+ ions and NO3- ions.
There is ionic bonding between Mg²⁺ ions and NO₃⁻ ions. A Further explanation is below.
Ionic bonding seems to be a form of interaction wherein the cationic as well as unpaired electrons are powerfully electrostatically connected.
Throughout the general view, the ionic bonding occurs between someone metal/nonmetal owing to their large electro(-) discrepancy, while bond formation occurs between nonmetals due to the relatively low electro(-) gap.Even though there are metals as well as non-metals, the relative electronegativity differential between (Mg²⁺) and (NO₃⁻) however is large.Thus the above response i.e., option D) is correct.
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Write the products and balance the equation:
C4H7OH + O2 → CO2 +H2O
Answer:
C4H7OH + 6O2 => 4CO2 + 4H2O
Explanation:
hope This helps :)
1. How many moles are in 3.01 x 10^23 molecules of Boron trichloride
Answer: There are 0.499 moles present in [tex]3.01 \times 10^{23}[/tex] molecules of Boron trichloride.
Explanation:
According to mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of a substance.
Hence, number of moles present in [tex]3.01 \times 10^{23}[/tex] molecules are as follows.
[tex]Moles = \frac{3.01 \times 10^{23}}{6.022 \times 10^{23}}\\= 0.499 mol[/tex]
Thus, we can conclude that there are 0.499 moles present in [tex]3.01 \times 10^{23}[/tex] molecules of Boron trichloride.
Which of these has a bond that takes the most energy to break?
a) Brz
b) N,
c) 02
d) HCI
Answer:
Hello! Your answer would be, D) HCI
Explanation:
Hope I helped! Ask me anything if you have any questions. Brainiest plz!♥ Hope you make a 100%. Have a nice morning! -Amelia♥
If you stay at 90 degrees Celsius and a gas in a liquid solution has a pressure of 2 atm, what solubility should it have if it has a solubility of 64 g/L at a pressure of 8 atm?
Answer:
im not sure
Explanation:
6) What is the picture below an example of?
Answer:
The picture below is an example of a food chain.
Explanation:
The bug (can't tell which one by the picture) eats the grass, the frog eats the bug, the snake eats the frog, and the eagle eats the snake.
For the equation 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O, how many units of NO3 are represented on the products side?
I never learned what parentheses mean in chemical reactions
Well anyway no assumptions and no links
Answer:
6
Explanation:
3 * 2 =6
what is bank?Effect of drug abuse.
- Long term effects
Chronic drug use can alter a person’s brain structure and function, resulting in long-term psychological effects, such as: depression, anxiety, panic disorders, increased aggression, paranoia, hallucinations.
- Cardiovascular disease
Stimulants, such as cocaine and methamphetamines, can damage the heart and blood vessels. The long-term use of these drugs can lead to coronary artery disease, arrhythmia, and heart attack.
- Respiratory problems
Drugs that people smoke or inhale can damage the respiratory system and lead to chronic respiratory infections and diseases. Opioids slow a person’s breathing by binding to specific receptors in the central nervous system that regulate respiration. By depressing a person’s respiration, these drugs can lead to slow breathing or heavy snoring.
- Kidney damage
The kidneys filter excess minerals and waste products from the blood. Heroin, ketamine, and synthetic cannabinoids can cause kidney damage or kidney failure.
- Liver disease
Chronic drug and alcohol use can damage the liver cells, leading to inflammation, scarring, and even liver failure.
- Overdose
Taking too much of a drug or taking multiple drugs together can result in an overdose. According to the Centers for Disease Control and Prevention (CDC), drug overdose caused 67,367 deathsTrusted Source in the United States in 2018. Opioids contributed to nearly 70% of these deaths.
How to get help:
Finding the right treatment program can be a daunting task. Here are a few things to think about when seeking treatment for drug abuse, misuse, or addiction:
consider whether inpatient or outpatient services would be the best fit
find local treatment centers using this resource from the Substance Abuse and Mental Health Services Administration
note that state-run treatment centers and programs can be free of charge
look for programs that use evidence-based treatment strategies
13. This is an example of Earth's...
a. revolution.
b. rotation.
C. spiraling
d. turning
Select the correct answer.
What change takes place when a liquid absorbs heat energy without increasing its temperature?
A
the pressure increases
B
it vaporizes
с.
it solidifies
D.
the volume decreases
Answer:
It vaporizes.
Explanation:
When a substance absorbs heat energy and doesn't increase its temperature, that means it's going through a change of phase.
The next change of phase for a liquid is turning to a gas, so it vaporizes.
How much energy is required to change 75 grams of copper at 35 degrees Celsius
to liquid copper at 1200 degrees C?
34950 J of energy is required to change 75 grams of copper at 35 degrees Celsius to liquid copper at 1200 degrees Celsius.
What is Specific Heat?The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.
It is given by the formula -
Q = mcΔT
where, Q = amount of heat
m = mass
c = specific heat
ΔT = Change in temperature
Given,
Mass of copper = 75g
ΔT = ( 1200 - 35) = 1165⁰C
c = 0.4 J/g ⁰C
Q = mcΔT
= 75 × 0.4 × 1165
= 34950 J
Therefore, 34950 J of energy is required to change 75 grams of copper at 35 degrees Celsius to liquid copper at 1200 degrees Celsius.
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The pressure of a tire is 200kPa at a temperature of 27 C. On a hot sunny day, the pressure
rises to 223 kPa. What is the temperature of the air in the tire?
Explanation:
T1 = 27C + 273 = 300K
P1 = 200 kPa
P2 = 223 kPa
T2 = ?
According to Gay-Lussac's law:
P1/T1 = P2/T2
(200 kPa/300 K) = (223 kPa/T2)
T2 = (223 kPa/200 kPa)(300 K)
= 334.5 K
= 61.5°C
Draw Conclusions does the F2 generation support that lack of wings is a genetic trait? Explain why or why not
Answer:
An F1 offspring could produce four types of gametes, RY, Ry, rY, and ry. The F2 generation supports the independent-assortment model and refutes the linkage model.
Explanation:
A 780.0 g hard-water sample contains 276 mg Ca. What is the concentration in parts per million?
Answer:
353 ppm
Explanation:
PPM also refers to parts per million, it represents a low concentration of a solution. It represents 0.001 gram or a milligram in 1000 mL, equivalent to 1 mg per liter
Given that;
276 mg of Ca in 780.0 g of water
1 ppm = 1 mg/L
780 g = 780 mL = 0.78 L
Therefore;
= 276 mg/ 0.78 L
= 353.84mg/L
= 353 ppm
why doesn't food spoil as fast when it is refrigerated
Answer:
food doesn't spoil as fast when it is refrigerated because it would be at room temperature. Because of the lowered temperature, there are less collisions, which slows down the reaction! Due to decomposition reactions with oxygen or carbon dioxide in the air, meat begins to feel slimy and smell spoiled. and member mark me as brainliest
Answer:
A lower temperature slows down the reactions in the food because there are less collisions. The chemical breakdowns and microorganism activity can't work as fast as it used to because of the cold.
al is
Water moves under Earth's surface to fill in open spaces in rocks or soll.
this type of water called?
Please help please!!!!!!!
Answer:
surface water
Explanation:
I hope its correct
The first organisms to arrive in an ecosystem?
Two glass rods are rubbed together. One of the glass rods are brought near (but
does not touch) an uncharged pith ball. Would you expect the pith ball to attract,
repel, or do nothing? Explain why.
Answer:
Do Nothing
Explanation:
Charges are transferred by friction when two different types of bodies are rubbed together. This is known as charging by friction.
However, when two materials of the same type are rubbed together, no charge is transferred from one object to the other hence there is no transfer of charges by friction and none of the two glass rods are charged.
Therefore, when one of the glass rods is brought close but does not touch the pith ball, nothing happens.
PLS HELP ASAP NO LINKS
What type of scientist studies matter and its composition?
Biologist
Chemist
Physicist
Engineer
Answer:
.biology and maybe physics
Answer:
Biologist
ExplanationBiologist Unlike the above type of scientist, geoscientists’ work involves exploring the earth and its internal environment. They study the composition, structure, and processes of the earth by being indoors and outdoors. They contribute to the discovery of mines, petroleum deposits, minerals, and other aspects of the earth.
Hi!! i REALLY need help with this !! thank you !!
Answer:
proton
A proton is composed of two up quarks, one down quark, and the gluons that mediate the forces "binding" them together.
Which features are created by groundwater erosion and deposition? Check all that apply. stalagmites sinkholes rills stalactites gullies rivers
Answer:
Stalagmites
Sinkholes
Stalacites
Explanation:
These features are created because the ground water dissolves solid rocks and move the solid rocks, dissolve solutions beneath the ground water gradually and therefore enlarging the cracks, which eventually form a cave. Ground water carries minerals which are then deposited and can form stalagmites or stalactites. If a stalactite and stalagmite combine together, they usually form a column.
Answer:
a,b,d
Explanation:
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