HELP!!! DUE TONIGHT!!
10 PTS!!
the answers are given already but my teacher wants me to show work...pls help!!!
Answers
Answer:
K I will attempt
Explanation:
a)
[tex]O_2_{(g)}+ 2H_2_{(g)} => 2H_2O_{(l)}\\[/tex]
b)
1 : 2 : 2 (I don't know if this is what the question wants but it is what I would answer)
c)
Hydrogen because it requires 2 moles of H2 to react with 1 mole of O2
d)
24 moles of water. Look at stoichiometric coefficient. 2:2 means 24 moles you get 24 moles
e)
Oxygen. 2 < 5/2. Remember, 1 mole of O2 requires 2 moles of H2. But 5/2 is still greater than 2
f)
First, let's find out how many moles of water we can get. Since O2 is the limiting reactant, and O2:H2O ratio is 1:2, we will get 4 moles of H2O. Then, we can multiply 4 by Avogadro's number which is [tex]6.022*10^{23}[/tex] to get the number of molecules. We get: 2.41 * 10^24 molecules of water.
Answer:
I'ma just take the point thank you very much
Related Questions
What is the name of the compound NS2
Answers
Answer:
I believe what your looking for is Nitrogen disulfide
Explanation:
Hope this helps (:
You have a stock solution of HNO3 with a concentration of 4.5 x 10^-4 M. However, you need 275 ml of a 2.50 x 10^-5 M solution. How much of the stock solution will you need?
Answers
Answer:
15.28 mL
Explanation:
From the question given above, the following data were obtained:
Molarity of stock solution (M₁) = 4.5x10¯⁴ M
Volume of diluted solution (V₂) = 275 mL
Molarity of diluted solution (M₂) = 2.5×10¯⁵ M
Volume of stock solution (V₁) needed =.?
The volume of the stock solution needed can be obtained by using the dilution formula as illustrated below:
M₁V₁ = M₂V₂
4.5x10¯⁴ × V₁ = 2.5×10¯⁵ × 275
4.5x10¯⁴ × V₁ = 0.006875
Divide both side by 4.5x10¯⁴
V₁ = 0.006875 / 4.5x10¯⁴
V₁ = 15.28 mL
Therefore, the volume of the stock solution needed is 15.28 mL
What is a daughter element
Answers
Answer:
The element formed when a radioactive element undergoes radioactive decay. The latter is called the parent. The daughter may or may not be radioactive.
Explanation:
hope this helps
Which is the balanced equation for S8 + O2 → SO2?
S8 + O16 → 8SO2
S8 + O2 → S8 + O2
S8 + O2 → S8O2
S8 + 8O2 → 8SO2
Answers
Answer: S8 + O2 → S8O2: not 100% sure
Explanation:
A balanced chemical equation happens when the quantity of the particles is required on the reactants side is equivalent to the quantity is the molecules in the items side.
OP
Neutral
Negative
Obits
around the
nucleus
Nucleus
Make up
the mass
of an atom
Positive
Proton
o
O
O
O
Neutron
O
ООО
O
O
ОО
Ο Ο
Electron
о o
Proton
(location)
O
O
O
O
Electron
(location)
O
O
O
Protons and
Neutrons
O
о
o
What is the atomic mass of this atom? *
1 point
Answers
the answer is d hope this helps
Answer:
The answer is d
Explanation:
Which image best represents a solution of distilled water at pH = 7? A cylinder contains many pale blue balls and 3 purple balls. A box has a pale blue ball with the label H + and a purple ball with the label O H negative. A cylinder contains about equal numbers of pale blue balls and purple balls. A box has a pale blue ball with the label H + and a purple ball with the label O H negative. A cylinder contains 3 pale blue balls and many purple balls. A box has a pale blue ball with the label H + and a purple ball with the label O H negative.
Answers
Answer:
The answer would be B
Explanation:
got it right on edge2021
A pH of 7 indicates neutrality of the solution. A solution will be neutral when it contains equal number of H+ and OH- ions. Thus, the cylinder with containing equal number of purple and pale blue balls represents the solution with pH of 7.
What is pH?pH of a solution is the measure of its H+ ions concentration. Mathematically it is the negative logarithm of H+ ion concentration. pH of the solution determines the acidity or basicity of the solution.
A solution with pH of 7 is neutral. Thus having no acidity or basicity. The acid-base reaction neutralize each other forming their salt with pH of 7 and it is called neutralization reaction.
The solution with a pH below 7 is acidic and the solutions with pH above 7 are basic solutions. Bases are proton acceptors and they furnish OH- ions when ionized.
The solution with equal number of H + and OH- ions neutralize each other and thus have a pH of 7. Therefore, the cylinder with equal number of blue and purple balls represents the neutral water.
To find more on pH, refer here:
https://brainly.com/question/2288405
#SPJ2
What are compounds?
A. Pure substance
B.homogeneous mixtures
C.heterogeneous mixtures
ASAP PLZ HELP WIL GIVE BRAINLYS
Answers
Answer:
A compound is a material formed by chemically bonding two or more chemical elements.
Explanation:
write the chemichal formulae of the following compounds.1) Ammonium chloride2) calcium hydroxide
Answers
2. Ca(OH)2
Hope it helps
Use the equation weight=mg to find the weight of a 45 kg child
Answers
Answer:
well the answer is 99.2lbs I know that
Can someone help me on this letter E please
Answers
What part does chlorophyll play in photosynthesis?
A. It transports sugar and water to plant leaves
B. It uses suns energy to “cook”water and carbon dioxide
C. It drinks water from the soil around the roots of the plant
D. Breathes the air around the plants and gets carbon dioxide
Answers
Answer:
B
Explanation:
it uses the process of the light reaction stage and Calvin cycle to trap sunlight in the day and make food at night
Answer:
I think the answer is A or B
No one answers my Questions :(
Please help its my last one:
Name three sources of atmospheric carbon dioxide. (Write in complete sentences and be very detailed.)
This is science.
First and best answer gets 5 stars, a thanks, and a brainliest!
Answers
Doing this because I know I'm kickass at Chemistry.
One source would be human emissions. As humans, we use a lot of machines (like power plants) that produce large amounts of carbon dioxide into the atmosphere. The ocean also produces a lot of carbon dioxide via the evaporation cycle. Polluted waters eventually will go into the atmosphere. Volcanoes, even when not erupted, emit a lot of carbon dioxide as well. Dormant underground magma releases carbon dioxide through the Earth's pores, and even when a volcano erupts, it produces carbon dioxide as well.
Could someone pls help me if you know it!!
Answers
Answer:
Beautiftul, begging under F
honest, beginning in thrid line under A
hopeful, fifth line under F
Explanation:
As the first five elements in Group 14 are considered in order from top to bottom, there are changes in both the
A
electronegativity values and number of first shell electrons
B
electronegativity values and atomic radii
C
number of valence shell electrons and number of first shell electrons
D
number of valence shell electrons and atomic radii
Answers
Answer:
A
Explanation:
beacause in both the electronegativity values and number of first she'll electrons
In group 14 from top to bottom there are changes in both the electronegativity values and atomic radii changes.
What are groups?Groups in the periodic table are the columns in which elements are present which all are having same number of valence electrons.
On moving top to bottom in the 14th group of the periodic table:
Atomic size of the elements increases and electronegativity decreases.Number of electrons in the first shell of all elements will be same and in the outer most shell is also same.Hence electronegativity values and atomic radii changes.
To know more about groups of periodic table, visit the below link:
https://brainly.com/question/1645905
#SPJ2
what kind of bond would you find between two alike oxygen atoms
Answers
Answer:
Covalent bond
Explanation:
Answer: covalent bonds
BIOdotEDU. A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds.
Explanation:
Calcium
and what
makes bones hard
Answers
Calculate the number of atoms in 3.21 mole of Mg?
Answers
Answer:
1.93 × 10²⁴ atomsExplanation:
The number of atoms in a substance can be found by using the formula
N = n × Lwhere n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 3.21 × 6.02 × 10²³
We have the final answer as
1.93 × 10²⁴ atomsHope this helps you
Question 11 of 25
How do home computer scanners use electromagnetic waves?
A. The waves are absorbed or reflected to capture images or
information
B. The scanners change information received into modified radio
waves
C. The waves are absorbed by objects, making them warmer.
D. The waves make objects brighter, making them easier to see.
Ffff
Answers
Answer:
a.The waves are absorbed or reflected to capture images
Explanation:
How Things Work: TSA scanners use electromagnetic waves for detection. ... These waves are bounced off the body of the person being scanned to create a three-dimensional image on the computer. The backscatter units instead bounce low-level electromagnetic X-rays off the body to create an image on the computer
Answer:
A. The waves are absorbed or reflected to capture images or
information
Explanation:
Please select the word from the list that best fits the definition
Tracks the location, movement, and amount of precipitation in storms
Please select the word from the list that best fits the definition
A. radar
B. satellite
Answers
Answer:
satellite
Explanation:
found it on the internet
The correct answer is Radar
Please help!!! I'll give brainliest to the most helpful answer
please this is due today and I have no idea :// 3
Answers
88) D
89) B
90) E
91) C
What best describes the location of an atom's electrons? (1 point)
Answers
Answer:
The common way electrons are found in shells or orbitals that surround the nucleus of an atom.I hope it helped
Explanation:
pls mark brainliest
5. __HCl + __NaOH-> __NaCl + __H2O
6. __FeS + __HCl-> __H2S + __FeCl2
7. __C2H4 + __O2-> __CO2 + __H2O
INEEDHELP
Answers
Answer:
umm is this free points? cause this looks very ummm weird
Explanation:
Apart from cost, give three reasons why steel should be recycled
Answers
Answer:
Well, acutally it shouldnt..but why it should be recycled is because 1. you can use it for many nessactities such as cars and blades, and bikes
You should also recycle it for, scrap parts! so just in case if you need recycled steel ya know where to get it
Lastly, you should recycle steel because of its value. If you recycle steel then melt it, and make well i dont know, a blade out it, you might have just made something, and then think, "Well that was fun and easy, i wanna use more recycled items to build or forge things
Explanation:
Hope this helps and pls mark brainlest!
Answer:
i think because its cause pollution
Explanation:
when making steel a lot of pollution goes in the atmosphere so if you recyle the the steel we may less pollution [ im only 12 so im sorry if this was wrong]
When shark pups are small what do they eat
Answers
Answer:
The baby sharks are not connected to their mum through an umbilical cord. Instead, they feed on their egg's yolk supply, other unfertilized eggs or even the embryos of their brothers and sisters. Through the latter method, only the strongest 1-3 sharks will get born, which is seen in the sand tiger shark.
Explanation:
Rico is doing an experiment. He makes a solution of calcium carbonate in a beaker of 200 mL of water at room temperature (25 °C). He adds a small amount of lemon juice to the solution and a chemical reaction begins. Rico reduces the temperature of the solution by 10 °C by adding ice. As the solution cools, what will happen to the chemical reaction?
Answers
The question is incomplete, the complete question is;
Rico is doing an experiment. He makes a solution of calcium carbonate in a beaker of 200 mL of water at room temperature (25 °C). He adds a small amount of lemon juice to the solution and a chemical reaction begins. Rico reduces the temperature of the solution by 10 °C by adding ice. As the solution cools, what will happen to the chemical reaction?
A. The chemical reaction will stop suddenly.
B. There will be no change in the rate of the chemical reaction.
C. The chemical reaction will slow as the water cools.
D. The speed of the chemical reaction will increase as the water cools.
Answer:
C. The chemical reaction will slow as the water cools.
Explanation:
The rate of a chemical reaction is dependent on the temperature of the reaction system. This derives directly from the collision theory of chemical reaction.
The higher the temperature of the system, the more frequently the particles collide and the faster the rate of reaction.
As the temperature is decreased, the rate of reaction decreases simultaneously. Therefore, as Rico decreases the temperature from 25 degrees to 10 degrees, the rate of reaction decreases accordingly.
Quick Help 10 points
If the reactants of a reaction have one S and four O atoms, what will the
products have?
A. Four S atoms and four O atoms
B. One S atom and one 0 atom
O C. Four Satoms and one o atom
O D.One S atom and four O atoms
Answers
Answer:
The products will have one S and four O atoms.
the empirical formula for a compound used as a green paint pigment is C2H3As3Cu2O8. The molar mass of its molecular formula was found to be 1013 grams. What is the molecular formula?
Answers
Answer:
Molecular formula = C₄H₆As₆Cu₄O₁₆
Explanation:
Given data:
Empirical formula = C₂H₃As₃Cu₂O₈
Molar mass of compound = 1013 g/mol
Molecular formula = ?
Solution:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass of C₂H₃As₃Cu₂O₈ is 506.897 g/mol
by putting values.
n = 1013 / 506.897
n = 2
Molecular formula = n (empirical formula)
Molecular formula = 2 (C₂H₃As₃Cu₂O₈)
Molecular formula = C₄H₆As₆Cu₄O₁₆
The monomers of carbohydrates are called?
Answers
Answer:
monosaccharides
Explanation:
Monomers of carbohydrates are simple sugars and the basic building blocks of carbohydrates, they are also known as monosaccharides and are used by the cells of living things to store and produce energy.
Answer:
"the simple sugars" or Monosaccharides
Explanation:
Monosaccharides are the monomers of carbohydrates they are mostly called or referred to as "the simple sugars" hope this helped have a nice day (:
plz mark brainliest (:
whose main job is to break down sugar to release energy that a plant cell can use?
Answers
Answer:
The Mitochondria
Explanation:
Mitochondria are membrane-bound cell organelles that generate most of the energy required to power the cell's organic chemistry reactions. Energy created by the mitochondria is kept in a tiny molecule known as adenosine triphosphate (ATP).
The modern theory of the atom states that electrons do not travel in specific paths or orbits. Where do electrons travel? Can we predict where an electron may be found?
Answers
Answer:
1. When electric voltage is applied, an electric field within the metal triggers the movement of the electrons, making them shift from one end to another end of the conductor. Electrons will move toward the positive side.
2. Well, if you think about it logically, the Heisenberg Uncertainty Principle basically means that it's impossible to predict both exactly what the electron will do or exactly where the electron will be found. In other words, when you know where the electron is going, you don't know where it is.
Pls answer my question to the best of your ability down the bottom of yours. Thankyou! :)
