Answers
Answer:
(i) of protons
(ii) total number of both protons and neutrons
(b)they are neutral or have no overall charge because there are equal numbers of negative electrons to positive protons
Explanation:
Since both charges are equal, the number of positive protons cancels the number of negative electrons, thereby making the atom neutral
Related Questions
Cần bao nhiêu gam KMnO4 và bao nhiêu mililit dung dịch axit clohiddric 1M để điều chế đủ khí clo tác dụng với sắt , tạo nên 16,25 G FeCl3
Answers
Answer:
I don't know what you're saying cuz give me the brainless answer please
I will give Brainliest please help. :(
The given equation represents a chemical reaction occurring in plants. Does this chemical equation show Conservation of Mass?
Answers
Answer:
Conservation of mass occur when your chemical equation is balanced.
So let's see if it is balanced:
6CO₂ + 6H₂O ------> C₆H₁₂O₆ + O₂
You need to have the same quantity of atoms of each element on the product side and reactant side.
Reactant side: 6CO₂ + 6H₂O
Product side: C₆H₁₂O₆ + O₂
What is the concentration of H+ in a 2.5 M HCl solution?
Answers
Answer:
The concentration of H⁺ in a 2.5 M HCl solution is 2.5 M
Explanation:
As HCl is a strong acid and hence a strong electrolyte, it will dissociate as
HCl ⟶ H⁺ + Cl⁻
So, The concentration of H⁺ will be 2.5 M (same as HCl)
Thus, The concentration of H⁺ in a 2.5 M HCl solution is 2.5 M
-TheUnknownScientist 72
Chemistry help!
How much 1.50 M H3PO4, in mL, would you need to add to 50.00 mL of 3.50 M Ca(OH)2 in order to neutralize the solution?
_____ of mL of H3PO4
Answers
Answer:
Use the formula below
Explanation:
use the moles ratio for this by writing down the reaction and balancing the equation
-.
How were organisms in the locations pictured affected by the hurricane in volcanic eruption
Answers
15. Which of the following BEST describes weather?
Answers
Answer:
Explanation:
Which of the following best describes weather? day to day conditions of the atmosphere at a place in regards to heat, dryness, sunshine, wind, rain, etc. long-term conditions (30 or more years) of the atmosphere at a place in regards to heat, dryness, sunshine, wind, rain, etc.
Answer:
Weather is short term climate is long term.
Explanation:
N2(g) + 3H2(g) ⟶ 2NH3(g)
The equation above is the equation for the Haber process.
If 2.0 moles of nitrogen are available for a reaction, what amount of hydrogen represents the correct stoichiometric ratio?
Answers
How many mols in 22.45g of water?
Answers
Answer:
1.247mol
Explanation:
moles=mass/molar mass
molar mass of water = 1+1+16=18
mass = 22.45
22.45÷18
= 1.247 moles of water
Answer:
Explanation:
Explanation
Periodic tables vary in how many places of sig digits they show. I always use approximate values which means that you will have to redo the question using your values
Water (1 mole)
2 * H = 1.01 * 2 = 2.02
1 * O = 16 * 1 = 16.00
Mass 1 mole = 18.02
Moles water
given mass = 22.45
molar mass = 18.02
moles = given mass/ molar mass
moles = 22.45 / 18.02
moles = 1.246 moles
How many moles of NO₂ would be required to produce 5.73 moles of HNO₃ in the presence of excess water in the following chemical reaction?
3 NO₂(g) + H₂O (l) → 2 HNO₃(g) + NO(g)
Answers
Answer:
8.595 mol NO2
Explanation:
5.73 mol HNO3 * [tex](\frac{3 mol NO2}{2 mol HNO3})[/tex] = 8.595 mol NO2
A cars is moving at 12 m/s and has a mass of 600 kg. What is the kinetic energy for the car? (Formula:KE= 1/2 MV2) 36,300J 43,200J 72,600J 86,400J
Answers
Explanation:
ano po topic nyo para maayos sagut
First make sure everything has the correct unit, in this case the unit all are S.I Units. Then, just compute the data into the Kinetic Energy formula. Its direct.
How much do 3.01 x 1023 atoms of Helium weigh?
Answers
Answer:
4.0 grams
Explanation:
I hope that helped!!
All the participants in the Genius Dog Challenge are
border collies, which some experts think are the ____
breed of dog. (This was for chemistry class so dont ask why its under chemistry)
Answers
All the participants in the Genius Dog Challenge are Border Collies, which some experts believe to be the intelligent breed of dog.
Border Collie is the name of a breed of dog that is characterized by:
It arose on the border between Scotland and England.Its main use is shepherd dog.It is a dog considered one of the most intelligent and obedient.Border Collies have physical characteristics such as:
Medium sizeCoat: double coat of thick hair that sheds often.Colors: most common are black and white.Learn more in: https://brainly.com/question/18670592
A student rides a bicycle 100 meters in 25 seconds. What is the students speed?
Answers
Answer:
The student's speed is 4 m/s.
Explanation:
Speed = Distance/Time
Speed = 100m/25s
Speed = 4 m/s
does SO3 2- show delocalized bonding
Answers
Answer:
YES
Explanation:
SO3 2-DOES show delocalized bonding
delocalized bonding occurs when there is a resonance structure and the electronic bonds are a delocalised "cloud" around the species
The resonance effect of the sulfite sructures ithe folowing link:
https://www.chemistryscl.com/general/lewis-resonance-structure-of-SO32-/index.php
Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore SO₃²⁻ show delocalized bonding.
What is Ions?Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.
Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state.
SO₃²⁻ show delocalized bonding as there is a resonance structure and the electronic bonds are a delocalized "cloud" around the species
Therefore SO₃²⁻ show delocalized bonding.
To learn more about ions, here:
https://brainly.com/question/13692734
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PLSS CAN ANYONE HELP ME..
Answers
Answer:
there is two mixture homogeneous and heterogeneous mixture
ok
Which of the following statements about mass is true? (1 point)
A. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, the mass will be converted to weight.
B. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, the mass will be less.
C. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, its mass will still be 2,500 kg.
D. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, its mass will be more.
Answers
Answer:
a because mass is converted into weight
Karl likes to use cruise control when he drives on
the highway. After setting cruise control at 33.53
m/s (75 mph). At this speed, how long would it
take Karl to travel 8 kilometers?
Answers
Answer:
3.96 MINUTES
Explanation:
Karl likes to use cruise control when he drives on
the highway. After setting cruise control at 33.53
m/s (75 mph). At this speed, how long would it
take Karl to travel 8 kilometers?
VELOCITY = DISTANCE/TIME
OR
V=D/T
SO
VT=D
SO
T=D/V
THE DISTANCE IS 8 KM
THE VELOCITY IS 75 MPH
THERE ARE 1.61 KM PER MILE
SO
75M[H =
75 X 1.61 KM/H =
121 KM/HR
T=D/V
T=8/121 =0.066 HOUR =
0.066 X 60 MINUTES =
3.96 MINUTES
CHECK
75 MPH =
(75 X 1.61) KM/60 MINUTES =
120,75 KM/60 MINUTES=
2.01 KM/MINUTE
to travel 8 K,M WILL TAKE
8/2.01 = 3.98 minutes
if n=3, what are the quantam numbers l and m
Answers
Answer:
1=n yan ang alam heheheheh sorry kong mali
Which is most likely part of a healthy heart and lung system?
A. daily exercise
B. carbohydrate-rich diet
C. maintaining a high body mass index
D. diet low in vegetables and lean proteins
Answers
This is because you do not want to diet low in vegetable because that would be bad for your body. So D is crossed out. You don’t want to have a high body mass index which means weight.. so you don’t want to gain a lot of weight. So C. Is out. You definitely do not want a rich carbohydrates diet because that’s bad for you. So A is the answer.
Genes that confer resistance to antibiotics provide a selective advantage to organisms that are exposed to antibiotics. true or false
Answers
Answer:
True
Genes providing resistance to antibiotics will provide an organism protection against the antibiotics, which are used to kill it, therefore it is indeed an advantage for their survival
A solution of HF is titraited with a 0.150M NaOH solution. The pH at the half equivalence point is ? The Ka of HF I 0.00068.
Answers
Answer:
don't know00000⁰0000000
What is the temperature (in K) of a sample of nitrogen with an root-
mean-square velocity of 597.0 m/s The universal gas constant,
R=8.3145 J/mol K.?
Answers
The Temperature of given nitrogen sample will be 401.3 K and can be calculated by formula of root mean square velocity.
Firstly we will determine the mass of a nitrogen molecule in kilograms:
Replace the variables and the constants in root-mean-square velocity equation, replacing Joules with equivalent kg m2s–2:
The formula for root mean square velocity is given by,
μrms= √3RT/m
where,
μrms is the root mean square velocity
R is the gas constant
T is the temperature
m= mass of nitrogen atom
μrms= √3× 8.314×T/ 0.028
597.0/T= √3× 8.314/ 0.028
T= 597.0/ √3× 8.314/0.028
√T= 597.0/ 29.8
T= 401 .3 K
The temperature of sample of nitrogen is 401.3 K.
To know more about rms velocity, please refer:
https://brainly.com/question/14526188
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In which substance are the electrostatic forces between molecules the strongest?
(1 point)
O acetone
O propane
turpentine
glycerin
Answers
The Whole Electrical Bonding Investigation Plan Quick check
1) B. boiling point, surface tension, vapor pressure
2) A. glycerin
3) C. the temperature at which additional heat energy causes the substance to change from a liquid to a gas
4) D. Heat each substance in liquid form to its boiling point. Measure the temperature of each substance
5) A. A liquid boils when the vapor pressure equals the atmospheric pressure.
The substance with the strongest electrostatic force has been Glycerin.
The boiling point has been the temperature required for the conversion of the liquid phase to the gaseous phase. The boiling point has been dependent on the intermolecular forces between the molecule.
The molecule with the higher interactions have a higher boiling point, and the molecules with the weaker interaction forces have a lower boiling point.
Among the given compounds, Glycerin has been the compound with the highest boiling point, thus the interactions within the glycerin molecules have been the greatest.
For more information about electrostatic interaction, refer to the link:
https://brainly.com/question/13555353
1. Calculate the density of an object that is has a mass of 24 grams and a volume of 6 cm cubed
Answers
Answer:
4g/cm cubed
Explanation:
density=mass/volume
d=24/6
d=4
What is happening when scientists use their five senses to learn new
information?
A. Drawing a conclusion
B. Forming a hypothesis
C. Making observations
C
D. Making predictions
VIOUS
Answers
Answer:
A, drawing a conclusion
Explanation:
Can all alkyl halides react with water to give alcohols?
Answers
Not all acid-catalyzed conversions of alcohols to alkyl halides proceed through the formation of carbocations. Primary alcohols and methanol react to form alkyl halides under acidic conditions by an SN2 mechanism.
Not all acid-catalyzed conversions of alcohols to alkyl halides proceed through the formation of carbocations. Primary alcohols and methanol react to form alkyl halides under acidic conditions by an SN2 mechanism.
In these reactions the function of the acid is to produce a protonated alcohol. The halide ion then displaces a molecule of water (a good leaving group) from carbon; this produces an alkyl halide:
Again, acid is required. Although halide ions (particularly iodide and bromide ions) are strong nucleophiles, they are not strong enough to carry out substitution reactions with alcohols themselves. Direct displacement of the hydroxyl group does not occur because the leaving group would have to be a strongly basic hydroxide ion:
We can see now why the reactions of alcohols with hydrogen halides are acid-promoted.
Carbocation rearrangements are extremely common in organic chemistry reactions are are defined as the movement of a carbocation from an unstable state to a more stable state through the use of various structural reorganizational "shifts" within the molecule. Once the carbocation has shifted over to a different carbon, we can say that there is a structural isomer of the initial molecule. However, this phenomenon is not as simple as it sounds.
- BRAINLIEST answerer
Which of the following examples from the story "The Dentist" uses direct characterization to tell you how Lemon
felt about dentists?
Answers
Answer: the second answer makes the most sense
Explanation:
Curt Lemon was tensing the weighters there. So he was playing fidgets and dogs. Lemon make the character mentally fearing and thus option B is correct.
What is the story dentist?This is a terrifying tale involving a man who is going to the dentist. He is dreadfully afraid of visiting the dentist because of the pain it would cause. Then, for him, things significantly worsen..
He notes that because he didn't know Curt Lemon well, mourning for him was challenging, but to avoid sounding sappy, he shares a quick Curt Lemon story.
The men are working in an operational region near the South China Sea in February. An Army dentist is flown in one day to examine the men's teeth. Curt Lemon is anxious as the platoon waits to be checked one by one.
Finally, he acknowledges that when in high school, he had some negative dental experiences. He claims that nobody should interfere with his teeth, and when he is called, he will decline to enter.
However, when the dentist summons him a little while later, Lemon gets up and enters the tent.Thus option B is correct.
To find more about the story Dentist, refer the link below:
https://brainly.com/question/11991206
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Lead (II) nitrate is reacted with sodium chloride to form a precipitate. What volume (in mL) of 0.666 M lead (II) nitrate is required to react with 517 mL of 2.27 M sodium chloride solution
Answers
Answer:
Explanation:
lead 3 is correct!!!!!
Maintenance of............of the body such as temperature level, water content, pH and blood pressure to be in balanced and stable condition
Answers
How many particles are in 3.5 g of P
Answers
Explanation:
Hence an atom is made up of three particles called electrons, protons and neutrons and 1 mol exactly contains 6.02214076×1023 atoms or particles. Thus 2.11×1024 atoms are present in 3.5 mol of arsenic.
