Answer:
O A. The electrons orbit the protons at the atom's center
Explanation:
It was proved by Bohr that electrons are revolving in orbits which creates magnetic fields around the atom.
What do electrons Do in ionic bond? Do they transfer from metals to no metals or nonmetal to metals?
Answer:
electrons get transfered from metals to non metals in the formation of ionic bond.
metals have the tendency to lose electrons whereas non metals tend to stabilize by gaining electrons.
What does the rate law use to determine the rate of a reaction?
A. The rate of a reaction is set equal to the rate constant of the
reaction.
B. The rate of a reaction is calculated using the concentrations of
reactants.
C. The rate of a reaction is calculated using the concentrations of the
products.
D. The rate of a reaction is calculated using the temperature of the
solution.
Answer:
B
Explanation:
reaction order is simply the sum of orders for each reactant.
The rate of a reaction is calculated using the concentrations of reactants and is denoted as option B.
What is Rate law?
This is a type of relationship which depicts comparison of reaction rates with the reactant concentrations.
This is because the reactants are the ones involved in a chemical reaction to form products.
Read more about Rate law here https://brainly.com/question/16981791
#SPJ6
give me 3 facts and 3 superstitious about the moon
Facts:
1. The Moon has no atmosphere
2. The Moon has quakes
3. The Moon is a dusty ball of rock, measuring 3,476km in diameter
Superstitions :
1. Gazing too long at the full moon will bring out one’s inner lunatic.
2. The waxing of a new moon is the best time for sowing seeds, weddings, childbirth, new projects and travel.
3. It is bad luck to see the new moon, for the first time of the night, through glass or tree branches.
Hope this helps and if it does, don't be afraid to give my answer a "Thanks" and maybe a Brainliest if it's correct?
What should Peru do to improve science?
Answer:
scientists say the country has many home advantages for good research,but it desperately needs more government interest
A sample of an unidentified compound contains 29.84% sodium, 67.49% chromium, and 72.67% oxygen. What is the compound's empirical formula? If the molar mass of the molecular formula is 523.96 g/mol, find the molecular formula.
Empirical Formula:
Molecular Formula:
Answer:
i would help i just dont know sorry
Explanation:
Why is water a great solvent
Answer:
Water can become so heavily attracted to a different molecule, like salt (NaCl), that it can disrupt the attractive forces that hold the sodium and chloride in the salt molecule together and, thus, dissolve it.
Explanation:
HELP ME PRETTY PLS PLS HELP ME FAST
Answer:
The producer is the grass, and energy flows from the mouse to both the snake and the owl.
Explanation:
The producer is usually defined as a "Producers, also known as autotrophs, make their own food.". Thus, the grass is the producer of the food web provided.
The energy also flows from the mouse to the snake and the owl, as the mouse has two arrows that lead away from it, leading both to the snake and the owl.
Hope this helps.
(reply if you know the answer or get reported) How many atoms are there in 5 grams of silicon?
Similarly, for one gram atomic weight of silicon with atomic weight of 28 grams, one mole of silicon still contains 6.022 × 1023 silicon atoms.Answer:
Explanation:
hope it helps
is 1 g of NaCl equal or not equal to avagadro's number
Answer:
Your answer ,it is not equal to it
metamorphic rocks result from the
A) cooling and solidification of molten magma
B) compression and cementation of soil particles
C) recrystallization of rocks
D) erosion of rocks
What is the pH of a solution with a 3.2 × 10−5 M hydronium ion concentration
4.3
4.5
11
12
Answer:
4,5
Explanation:
-log(H+)=-log(3,2x10^-5)=4,49
The pH of the solution will be 4.49
What is pH?A solution's acidity or alkalinity is determined by the concentration of hydrogen ions in the solution. Typically, the pH scale ranges from 0 to 14. Acidic aqueous solutions with a pH will be less than 7 at 25°C are acidic, while basic or alkaline aqueous solutions with a pH will be more than 7 considered basic or alkaline.
The pH formula can be represented as:
pH = -log[[tex]H_{3}O[/tex]]
Calculation of pH is shown as:
It is given that the , [tex][H_{3}O^{+} ][/tex] = 3.2 × [tex]10^{-5} M[/tex].
Now, put the value of given data in pH formula.
pH = -log[3.2 × [tex]10^{-5} M[/tex]]
pH = -log[3.2] -log[[tex]10^{-5} M[/tex]]
pH = -0.5051b+5 log 10 (log 10 = 1)
pH = 4.49
Therefore, the value of pH will be 4.49.
To know more about pH click here.
https://brainly.com/question/12294404.
#SPJ2
4. Cell size is limited by the
(a) amount of cytoplasm.
(b) cell's ability to get rid of wastes.
(c) the size of the nucleus.
(d) the size of the plasma membrane.
Answer:
Maybe it's (a) amount of cytoplasm ...
hope its right
A solution at 25 degrees Celsius has a pOH of 6.42. What is the pH of this solution?
0.842
3.80
5.59
7.58
You must go to the mountain or apraturakados to answer this question. It will be a daring adventure, but the journey will be worth it. Good luck, student.
The actual answer is 7.58, sorry...
When A solution at 25 degrees Celsius has a pOH of 6.42. So here the pH of the solution is 7.58.
Calculation of the pH of the solution?Since we know that
pH + pOH = 14
here
pOH is 6.42
So,
pH = 14 - pOH
= 14 - 6.42
= 7.58
hence, When A solution at 25 degrees Celsius has a pOH of 6.42. So here the pH of the solution is 7.58.
Learn more about pH here: https://brainly.com/question/17487735
Do the middle one, will give brainliest
Answer:
it answer is (B)
the formula of toluene is C6H5CH3
it consists of a benzene ring with methyl group attached to it
best example of heterogeneous mixture
Answer:
examples include ice cubes in a drink, sand and water, and salt and oil.
help pls! thank u (:
Answer:
7.65 moles of silver are produced
Explanation:
Zinc, Zn, reacts with silver nitrate, AgNO3, as follows:
Zn + 2AgNO3 → Zn(NO3)2 + 2Ag
Where 1 mole of Zn reacts with an excess of AgNO3 to produce 2 moles of Ag
To solve this question we must convert the mass of Zn to moles and, using the chemical equation, we can find the moles of Ag as follows:
Moles Zn (Molar mass: 65.38g/mol):
250g Zn * (1mol / 65.38g) = 3.824 moles Zn
Moles Ag:
3.824 moles Zn * (2mol Ag / 1mol Zn) =
7.65 moles of silver are producedInfer: Why might a zone of upwelling be a good place to fish?
First lets define upwelling
Upwelling- a rising of seawater, magma, or other liquid
In this case, you would be looking at a river, lake, ocean, or other body of water good for fishing.
You'd want to look for a place with upwelling because when there is a rise of water, the sea creatures within it will rise too. So the fish in the bottom of a lake for example would be brought up to the surface of the water or near the surface which is where your fishing rod is trying to grab the fish.
I hope this helps! Don't be afraid to reach out with any further questions!
A sample of carbon tetrachloride (CCI) contains 3 moles of the substance. How many atoms are there in the sample?
O 1.806 x 1024
05
0 15
O 9.03 x 1024
Answer:
Number of atoms =1.806×10²⁴
Explanation:
You have the number of moles of Carbon tetrachloride which is n=3
And you are looking for number of atoms that are in the sample, which are represented by the letter "N"
The formula that has both number of moles(n) and number of atoms(N) is written as n=N/Na
Na is called the Avogadros number and it is equal to 6.08×10²³, it never changes(it is a constant)
So you will substitute the number of moles and the avogadros number to you formula, and the only unknown will be the number of atoms which you are looking for
n=N/Na3=N(6.02×10²³)N=1.806×10²⁴ atoms of CClNB: N does not represent the number of atoms only. It may also represent the number of particles or molecules...
(03.05 LC)
Which of the following increases the concentration of OH negative ions?
1.Acid
2.Base
3.Water
4.Salt
Which cell part is responsible for energy release?
A. nucleus
B. ribosome
C. mitochondrion
D. Golgi apparatus E. endoplasmic reticulum
Answer:
mitochondria is responsible for energy
The chemical formula for Ethyl Butyrate, a substance added to orange juice to make it smell sweet is C6H12O2.
Use the chemical formula to determine how many Carbon (C), Hydrogen (H), and Oxygen (O) atoms are present in 1 molecule of Ethyl Butyrate.
Ethyl Butyrate has ??
Carbon Atoms.
Ethyl Butyrate has ??
Hydrogen Atoms.
Ethyl Butyrate has ??
Oxygen Atoms.
(The answers are out of 1 ,2, 6 and 12)
Answer:
There are 6 carbon, 12 hydrogen, and 2 oxygen.
Explanation:
The numbers after each element tell you how many molecules there are!
H2O
for example has 2 Hydrogens and 1 Oxygen
two types of fine chemical
Answer:
Flavors and fragrances
Please, I need help with this problem.
Un gas a una temperatura de 38°C, tienen un volumen de 21 Lts Litros. ¿Qué volumen tendrá si la temperatura sube a 67°C?.
Answer:
. ¿Qué
Explanation:
Hope you have a great day
8. Skin cancer is a disease that occurs when skin cells grow in an uncontrolled way. It can be caused by UV
light, which can alter the genetic sequence of skin cells. Which choice below best describes how UV
light might cause skin cancer?
a. UV light changes the genetic code that makes the proteins in the skin cell. The new code
changes the structure and function of these proteins. When the proteins that control cell
growth change in a way that makes them no longer work, cancer is the result.
b. UV light changes the shape of the proteins in the skin cells. These proteins change the
genes in the cell. This makes the cell grow uncontrollably resulting in cancer.
C. UV light makes skin cells grow faster. Overtime, the skin cells adapt to the UV light by
growing faster and faster. Eventually they grow so fast that their growth is no longer
controlled, this results in cancer.
d. None of the above.
Answer:
Explanation:
I think none of the above, because when caused by a UV light it damages the cells. And if enough builds up overtime it causes uncontrollable growth and leads to skin cancer.
Hope that helped? It might be another answer honestly.
PLEASE HELP !
(In the column for the other reactants and/or products indicate whether they increase, decrease, or stay the same.)
Chemical Reaction:
A (g) + B (g) ←→ 3C (g)
Blue ← → Clear, Colorless
WHAT ARE THE:
Stress , Equilibrium Shift (right or left) , A (g) , B (g) , C (g) , What color?
1. Add A
2. Add B
3. Add C
4. Remove A
5. Remove C
Answer:
See Explanation
Explanation:
We must remember that when a constraint such as a change in concentration, pressure or temperature is imposed on a reaction system in equilibrium, the equilibrium position will shift in such as way as to cancel the constraint.
If more of A or more of B is added to the system, the equilibrium position will shift towards the right and the solution becomes clear and colorless.
If C is added to the system, the equilibrium position will shift towards the left and the solution colour turns blue.
If A is removed from the system, the equilibrium position is shifted towards the left and the solution once again turns blue.
If C is removed from the system, the equilibrium shifts towards the right and the solution turns clear and colorless
Considering the temperature vs. time graph below, how does the temperature at the beginning of a change of state
compare with the temperature at the end of the change?
Temperature vs. Time
140
120
100
Temperature (°C)
ВО
80
40
20
Time (min) →
The temperature is always lower
The temperature is always the same.
The temperature is usually lower
O The temperature is usually higher
O
Answer:
always the same
Explanation:
e2020
how many moles of H are there in 39.2g of H
Answer:
39.2 g
Explanation:
because moles = mass / mr (mr of h is 1)
so 39.2/1= 39.2 moles
hope this helps you to understand :)
If 85.0 grams of ethanol reacts, how many grams of carbon dioxide are produced?
Answer:
162.4g of CO2 are produced
Explanation:
The combustion of ethanol, C2H5OH, occurs as follows:
2C2H5OH + 7O2 → 4CO2 + 6H2O
Where 2 moles of C2H5OH produce 4 moles of CO2.
To solve this question we need to convert the mass of ethanol to moles. Then, the moles of ethanol to moles of CO2 using the balanced reaction and to mass:
Moles C2H5OH -Molar mass: 46.07g/mol-
85.0g * (1mol / 46.07g) = 1.845 moles C2H5OH
Moles CO2:
1.845 moles C2H5OH * (4mol CO2 / 2mol C2H5OH) = 3.69 moles CO2
Mass CO2-Molar mass: 44.01g/mol-:
3.69 moles CO2 * (44.01g/mol) =
162.4g of CO2 are producedYou are working in the lab, how many grams of solute you need to make 200.0 g of 3.4% of solution?
Answer:
6.8g of solute are needed
Explanation:
Percent by mass, (w/w%) is defined as the mass of solute in 100g of solution. A solution that is 3.4% contains 3.4g of solute in 100g of solution. That means to make 200g of solution are required:
200g solution * (3.4g solute / 100g solution) = 6.8g of solute are needed