Answer:
i think it's oxygen
Explanation:
the smart kid in my class said so lol
can some give 2 paragraph about science
Answer:
Explanation:Science is the scholarly and down to earth movement, including the efficient investigation of the structure and the laws of nature with intensive trial and pragmatic perception. Science is isolated into three branches: Natural sciences, Social sciences, formal sciences.
Science offers new information and revelations of many things we do not know. Day by day, science is progressing. Now science has helped man reach the moon, which was once unknown to man as a satellite. Every invention in technology or medical techniques is based on science and scientific research
Remember mass/atoms is not created or destroyed. Atoms don't appear and disappear. Mark the only balanced equation below.
Answer:
The answer is Option 4
Explanation:
What is the chemical formula for nitrogen hetasulfide
Answer:
N203
Explanation:
Answer:
n203
Explanation:
When 0.0801 mol of an unknown hydrocarbon is burned in a bomb calorimeter, the calorimeter increases in temperature by 2.19°C. If the heat capacity of the bomb calorimeter is 1.229 kJ/°C, what is the heat of combustion for the unknown hydrocarbon, in kJ/mol?
Answer:
S A T. NV
Explanation:
After the phase change in the diagram below, the molecules will move...
?
Energy transferred in
Molecules moving
around each other
A faster, and the substance will be a solid
B faster, and the substance will be a gas
C slower, and the substance will be a liquid
D slower, and the substance will be a gas
Answer:
C is the correct answer
I hope this helps you:)
Explanation:
C slower, and the substance will be a liquid
How does electronegativity affect
bonding? (Think about ionic vs
covalent).
Is it better for an element to be more abundant or less abundant?
I believe it's better for it to be more abundant because it's better to have more then less. Take water as an example. Water is an important factor to our survival and if we didn't have enough of that we would be in trouble. Or if we needed food but there wasn't enough more people would be dying from starvation. It's better to have a little more than a little less.
On a recent day the difference between the lowest temperature at the highest temperature of the day was 9*C. By how many degrees fahrenheit did the temperature change
Answer:
48.2 Fahrenheit
Explanation:
Temperature change = 9*C
By how many degrees Fahrenheit did the temperature change?
The relationship between Fahrenheit and degree Celsius is given as;
F = (9 / 5) C + 32
Inserting the value of C;
F = (9 / 5) * 9 + 32
F = 48.2 Fahrenheit
what are the preparations of alcohols?
Answer:
Alcohols are prepared by SN2 reaction
Alkyl halides can be converted to alcohols by using SN2 reactions with OH- as a nucleophile. Substrates that undergo substitution by SN1 reaction can be converted to alcohols using water as the nucleophile (and it can even be the solvent).Explanation:
Which best describes a single atom of an element?
A. It is the simplest form of matter.
o
B. It can be changed into a compound.
C. It is composed of more than one type of atom.
D. It can be broken down into simpler mixtures.
Answer:
I believe the answer is A: *It is the simplest form of matter" not 100% sure but I think that's correct
Explanation:
What volume of a 3.00M KL stock solution would you use to make 0.300 L of a 1.25M Kl solution?
Answer:
0.125L or 125 mL
Explanation:
See the image for steps!0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.
What is solution?A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.
What is stock solution?A stock solution is a concentrated solution that will be diluted to a solution of lower concentration.
stock solution = diluted solution
What do you mean by dilution?Dilution is the process of decreasing the concentration of a stock solution by adding more solvent to the solution. The solvent added is the water. The more the solvent you add, the more dilute the solution is.The equation for dilution is M1V1=M2V2Where, M1 = concentration in molarity (moles/Litres) of the concentrated solution
V2 = volume of the concentrated solution,
M2 = concentration in molarity of the dilute solution
V2 = volume of the dilute solution.
The volume of 3.00M KI solution can be calculated using the dilution equation:
Given:
M1 = 3.00M, M2 = 1.25M, V1 = x, V2 = 0.300L
M1V1 = M2V2
3.00M(x) = 1.25M(0.300L)
x = 0.125L
Hence, 0.125L of 3.00M KI stock solution is required to make 0.300 L of a 1.25M KI solution.
To learn more about dilution here
https://brainly.com/question/15718488
#SPJ2
Which has more mass, one mole of carbon (C) or one mole of copper (Cu)?
Explain.
The mass ratio of H:S:O in sulfuric acid today is 1:8:32. Predict the mass ratio of sulfuric acid in 23th century.
In the 23rd century, the mass ratio of H:S:O in sulfuric acid will remain 1:8:32.
Law of definite proportionsWe know from the law of definite proportions that irrespective of the path through which a chemical compound is obtained, it has a fixed composition by mass.
As such, the composition of a chemical substance does not vary. Therefore, in the 23rd century, the mass ratio of H:S:O in sulfuric acid will remain 1:8:32.
Learn more about law of definite proportions:https://brainly.com/question/13204929
Which lists the substances from least to most acidic?
a. ammonia, blood, milk, orange juice
b. orange juice, milk, blood, ammonia
c. ammonia, milk, blood, orange juice
d. orange juice, blood, milk, ammonia
A sample of oxygen gas has a volume of 130.0 ml when its pressure is 0.952 atm. What will the volume of the gas be
at a pressure of 0.974 atm if the temperature remains constant?
Answer:
the volume of the gas when pressure 0.974atm is equal to 127.06ml
In what ways are you being physical activie in a typical day?
Almost all of the energy that supports life on Earth comes from _______________________.
Answer:
THE SUN!
Explanation:
How many formula units in 7.25 moles of Al2O3.
Answer:
If you're asking for the mass (grams)
then 739.21 g
Explanation:
No. of mols = mass/molar mass
Mass= Molar mass x No. of mols
Mass= 101.96 g/mol x 7.25 mols
Mass= 739.21 g
Severe droughts cause some lands to become deserts, and this process leads to
water shortages
lands becoming
deserts
food shortages
all of the above
A compound is analyzed and found to be 50% sulfur and 50% oxygen. If the total amount of the sulfur oxide is 12.5 g, how many grams of sulfur are there? Show work.
Answer:
25.0g is the mass of sulfur
Explanation:
The sulfur and the oxygen are 50:50. That means there is 1 mole of S per mole of O.
To solve this question we need to convert the mass of O to moles, as moles of O = Moles of S, we can find the moles of S and its mass:
Moles O = Moles S:
12.5g O * (1mol / 16g) = 0.781 moles
Mass S:
0.781 moles * (32g / mol) =
25.0g is the mass of sulfurwhy hydrogen and oxygen atoms are more stable when they form bonds in a water molecule?
The outer shell of electrons is full, so there is no need to gain or lose electrons.
The hydrogen and oxygen atoms are more stable in water molecules as they get a complete valence shell when they bonded with other atoms.
What is the reaction to the formation of water?In a chemical reaction, two or more reactants react with each other under the chemical condition to form two or more products. The Chemical reaction is defined as a reaction two or more reactant components react with each other to form two or more products.
The water is formed by reacting hydrogen and oxygen. The chemical reaction of water formation is shown below.
[tex]H_2(g)+O_2(g)\longrightarrow H_2O(l)[/tex]
The balanced chemical equation can be defined as a reaction where the number of moles of reactants is equal to the number of moles of products.
[tex]H_2(g)+ \frac{1}{2}O_2(g)\longrightarrow H_2O(l)[/tex]
The hydrogen atoms have one electron and the oxygen has two electrons less than the complete valence shell. But in the water molecule, every atom has a complete valence shell so atoms become more stable.
Learn more about water formation, here:
https://brainly.com/question/16046990
#SPJ2
If 0.150 moles of calcium oxide reacts with carbon dioxide gas, how many grams of calcium carbonate can be produced?
Answer:
15 g of CaCo₃
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
CaO + CO₂ —> CaCo₃
From the balanced equation above,
1 mole of CaO reacted to produce 1 mole of CaCo₃.
Next, we shall determine the number of mole of CaCo₃ produced by the reaction of 0.15 mole of CaO. This can be obtained as follow:
From the balanced equation above,
1 mole of CaO reacted to produce 1 mole of CaCo₃.
Therefore, 0.15 mole of CaO will also react to produce 0.15 mole of CaCo₃.
Finally, we shall determine the mass of 0.15 mole of CaCo₃. This can be obtained as follow:
Mole of CaCo₃ = 0.15 mole
Molar mass of CaCo₃ = 40 + 12 + (16×3)
= 40 + 12 + 48
= 100 g/mol
Mass of CaCo₃ =?
Mole = mass / Molar mass
0.15 = Mass of CaCo₃ / 100
Cross multiply
Mass of CaCo₃ = 0.15 × 100
Mass of CaCo₃ = 15 g
Thus, 15 g of CaCo₃ were obtained from the reaction.
Which of the following particle diagrams represents a mixture?
Answer:
???
Explanation:
i would help answer but your post has no diagrams or at least there not showing up
True or False:Elephants, zebras, and giraffes are all apart of the same community
Answer:
false in this animals so much difference will there
why copper ions move to the negative electrode in figure 1
Answer:
negative attraction
Explanation:
because a copper ion looses electrons, meaning it's negatively charged, and positives and negatives attract.
Which type of plate boundary is associated with seafloor spreading at the source of the spread: convergent, divergent, or transform?
HURRY!
What is the oxidation number of s in na2s4o6?
Answer:
+2.5
Explanation:
So the oxidation number of S in Na2S4O6is +2.5.
Answer:
Explanation:
Oxidation number of Na = 1+ There are two of them, so it is 2*1 = 2
Oxidation number of O = 2- There are 6 of them so 6 * 2- = -12
There are 4 S's so the oxidation number is 4*S
Now set up a small equation
2 + 4s - 12 = 0
And solve.
2 - 12 + 4s =0
-10 + 4s = 0
4s = 10
4s/4 =10/4
s = 2.5
3. Which of the following represents a covalent compound?
a. 02
b. CO2
C. Cl2
d. Naci
For the Question "Which of the following represents a covalent compound?" we have
CO_2Option BFrom the Question we are told
'3. c
Generally
a covalent compound is a kind of bond in which valence electrons are shared b/w the party atoms forming the bond
Therefore
We see covalent compound in CO_2 as they match perfectly the phenomenon that is covalent bonding
Therefore
For the Question "Which of the following represents a covalent compound?" we have
CO_2Option BFor more information on this visit
https://brainly.com/question/14418346?referrer=searchResults
An advantage of using renewable energies is? 1.They are harmful to the environment 2.We have a limited supply of them 3.They allow us to take energy from natural processes
Answer:
3. They allow us to take energy from natural processes
Explanation:
There are two major sources of energy namely: renewable and non-renewable. Renewable sources of energy are those natural sources that gets replenished faster than they are utilized, which is contrary to non-renewable sources. Examples of renewable sources of energy are wind energy, solar energy, hydro (water) energy.
According to the question, one advantage or merit that renewable sources have over their counterparts is that they allow us to take energy from natural processes e.g. wind, sunlight etc.
how does the chlorine atom attain a stable octet in each of the preceding cases
Answer:
where is the question i can't see it