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
A sample of CO2 has a volume of 6.08 cm3 at 2.0 atm. At what pressure would this sample of gas have a volume of 42.0 cm?
А
28.9 atm
00
2.89 atm
С
0.289 atm
D
289 atm
What's the equation used to calculate how far a wave has traveled?
Plz help meeeeeeee !!!!!
Answer:
Na2S
Explanation:
last answer with Na2S
NEED HELP! thank you!
The same element is present before and after a
O chemical change
O physical change
O chemical reaction
O none of these
Answer:
This is a physical change.
Explanation:
As long as the identity of the substance has not changed, and the element is present before and after, it is a physical change! (Ex: ice melting)
The term used to describe the Moon phases as the light spreads across the surface of the moon or grows.
Answer:
Explanation:
New moon
Waxing crescent moon
First quarter moon
Waxing gibbous moon
Full moon
Waning gibbous moon
Last quarter moon
Waning crescent moon
Answer: Waxing
Explanation: Waxing means is getting lighter.
Waning means its getting darker.
2
Is the molecule with the formula Br
an element mixture or compound?
How do you know this?
Answer:
i do not know
Explanation:
PLS HELP
Geothermal power plants drill deep wells underneath
Earth's surface to pump water that is heated by magma. The steam from this hot water spins a turbine
that is hooked up to a generator that produces electricity. The cold water is then pumped back into
Earth to be reheated.
Do you think geothermal energy is a renewable resource? Why or why not? What are the benefits of
using this energy to power homes and businesses? Can you think of any consequences to communities
or the surrounding environment?
I
Answer:
Geothermal provides a reliable source of energy as compared to other renewable resources such as wind and solar power. This is because the resource is always available to be tapped into, unlike with wind or solar energy.
Explanation:
Because its source is the almost unlimited amount of heat generated by the Earth's core. Even in geothermal areas dependent on a reservoir of hot water, the volume taken out can be reinjected, making it a sustainable energy source.
Answer:
A geothermal power plant gets energy from the heat deep below the surface of the earth. Shafts are drilled down, often as deep as several kilometres, one to pump water down to the hot rocks, and another nearby which will allow the heated water (or steam) to rise up. This steam is then used to spin electricity turbines to generate electricity.
Explanation:
8. Why would it be a bad idea to make coins made of sodium metal?
Answer:
Sodium reacts with the oxygen in air. It reacts vigorously with oxygen and the moisture that is already present in the air and thus catches fire.
It would be a bad idea to make coins made of sodium metal, beacause of their reactive nature.
What is reactive species?Those species which are not stable in nature and always ready to show reaction with another species, is known as reactive species.
Sodium metal is highly reactive in nature, means it easly reacts with the atmospheric oxygen and shows oxidation or with the moisture content of atmosphere as a result of which vigorously catches fire. That's why we don't use sodium to make coin.
Hence, beacause of reactive nature sodium is not used.
To know more about sodium metals, visit the below link:
https://brainly.com/question/25597694
How many grams of lithium sulfide (Li2S) are in 275 g of a 16 % aqueous solution of Li2S?
Answer:
600 mAh·g−1
Explanation:
i hope this is good let me know if its wrong
IM IN A TEST NEED HELP ASAP
When 2.00 mol of the acid react with sodium carbonate, 1.00 mol of carbon dioxide is formed.Calculate the volume of carbon dioxide formed, in cm 3 , from 8.00 g of the acid at room temperature and pressure.
good luck on ur test i wish i could help u more but im only in 7th grade :/ and i dont know that yet, so sorry again! :(
Explanation:
Boreal forests are characterized by _______ trees. A. Creosote b. Eucalyptus c. Coniferous d. Deciduous Please select the best answer from the choices provided A B C
Answer:
c
Explanation:
coniferous trees, Tianga also called Boreal forest biome (major life zone).
hope it's perfect.
Answer: C is correct.
the metallic compound reduced to the metal by electrolysis is _____
please girls answer, because I think u r always right.
Answer:
Magnesium oxide
Explanation:
When magnesium reacts with oxygen, the magnesium atoms donate electrons to O2 molecules and thereby reduce the oxygen. Magnesium therefore acts as a reducing agent in this reaction. The O2 molecules, on the other hand, gain electrons from magnesium atoms and thereby oxidize the magnesium.
Can some right a paragraph about photosynthesis pls =))))))))))))))))))))))
Answer:
Photosynthesis is the process in which plants harness energy from the sun to make their own nutrition. The process converts light energy into chemical energy through cellular respiration.
Explanation:
Just to start you off. I hope it helps! (❛ ᴗ ❛)
Answer:
Photosynthesis is the process which a plant makes it's own food. The plant get energy from the sun and water from the soil. The plant lets the suns energy flow though so it touches all the parts that need it. When it get the water from the soil it goes into the stem and to the leaves. Photosynthesis is important because it benefits the air and us too. We can also help by put carbon dioxide. Photosynthesis is part the life cycle of a plant.
Explanation:
To balance a chemical reaction you can list all the atoms on the right and left, then count, and add coefficients until the reaction is balanced. Look at the reaction below. Choose the picture that shows a balanced chemical reaction for the reaction below.
Answer:
I think option 3 is correct
what is the orbital diagram for manganese?
Explanation:
Oxidation States. +2,3,4,6,7
Electrons Per Shell 2 8 15
Electron Configuration [Ar] 4s2 3d5
1s2 2s2 2p6 3s2 3p6 4s2 3d5
Write a balanced symbol equation for the incomplete combustion of hexane (C6H14) to produce soot.
Answer:
I77
Explanation:
Okay so don't take this the wrong way when I ask this cause its for science.
How many pill do you have to take too OD??
I think depends.......
Answer:
It depends on what medication/drug it is. Pharmaceutical drugs would be a lot before you could "od", some such as "xanax" take a short amount of time.
hope this helps!
What is the structure of epithelial cells?
6. How many molecules are in 2.7 moles of carbon dioxide
Answer:
2.7×6.022×10^23
=16.594×10^23 moleclules
Explanation:
number of mol= 2.7
1 mol of any element=6.022×10^23
therefote 2.7 mol =2.7×6.022×10^23
=16.594×10^23
Lokesh is sawing boards to make a deck. What is the area of the deck?
12 ft
9 ftil
6 ft
8 ft
OA. 198 square feet
O B. 234 square feet
O C. 207 square feet
O D. 171 square feet
Answer:
Explanation:
171
What part of the isotope notation help you determine the number of electrons within an isotope?
30. The more reactive halogen elements are able to replace the less reactive halogens from their com-
pounds. For example, if chlorine gas is bubbled
through a potassium iodide solution, elemental
iodine is produced.
Cl2(8) + Kl(aq) →12(s) + KCl(aq)
Calculate the mass of iodine produced when 2.55 g
of chlorine gas is bubbled through an excess amount
of potassium iodide solution.
31. Although we usually think of substances as “burn-
ing” only in oxygen gas, the process of rapid oxida-
tion to produce a flame may also take place in other
strongly oxidizing gases. For example, when iron is
heated and placed in pure chlorine gas, the iron
"burns” according to the following (unbalanced)
reaction:
Fe(s) + Cl2(8) ► FeCl3(s)
How many milligrams of iron(III) chloride result
when 15.5 mg of iron is reacted with an excess of
chlorine gas?
please help. this is due tonight. thanks!
Answer:
n=m/mr
n of cl2=0.0713mole
Form equation
cl2+k------- I2 s+kcl
1mole of cl=I moleof I2
0.0713mole of =x of I2
X mole of I2=0.0713
n=m/mr
0.0173=m/253.9
mass of I2=18.09g
HELP PLEASE | 15 POINTS Determine the number of valence electrons in each diagram shown below.
answer:
Cl = 7 valence electrons
Mg = 2 valence electrons
explanation:
in order to determine the valence electrons, just look at the outermost shell or the last shell. whatever number of electrons it has will be the number of valence electronWhat is the quantity of atoms in KMnO4 ?
Answer:
Potassium permanganate has a molar mass of 158.04 g/mol. This figure is obtained by adding the individual molar masses of four oxygen atoms, one manganese atom and one potassium atom
Explanation:
What is the electric configuration for phosphorus?
How do you determine the charges on the ions in an ionic compound?
Answer:
To find the ionic charge of an element you'll need to consult your Periodic Table. On the Periodic Table metals (found on the left of the table) will be positive. Non-metals (found on the right) will be negative.
Explanation:
How do I write a Major Electron Level Notation in the ground state??
The Theory of _________ states that new ocean crust is formed at ocean ridges where plates are diverging.
Why do we perform an experiment?
Answer:
Experiment plays many roles in science. One of its important roles is to test theories and to provide the basis for scientific knowledge. It can also call for a new theory, either by showing that an accepted theory is incorrect, or by exhibiting a new phenomenon that is in need of explanation.
Explanation:
Answer:
Explanation:
One of its important roles is to test theories and to provide the basis for scientific knowledge that we need to know. How are we supposed to know the answer to our question if we don't perform the experiment to test our question.
please help me with this
Ok buddy- so if you grab your periodic table there should be numbers on the side... (REFER TOO IMAGE ONE) So then we find them on the periodic table... (REFER TO IMAGE TWO) and if we look at the number the higher it gets the more radioactive it gets, and thats why it stops because the atomic gets so high that the level can't even be able to be mad because it will just explode and when it does that its dangerous because of how radioactive it is... so if we look the more "gas" concentrated elements are seen at the top (i.e. the helium) So the order would be He, C, O, Ne, Ca, I
Then just do that for the rest of them and the numbers on the side are the positive (+) or negative (-) amount of atoms that the atom is missing or ha to be stabilized or over stabilized, but you will learn that later on when you go into periodic equations.
Hopefully this helped, have a wonderful day! :)