Answer:
........................
How many moles are contained in 7.88 x 10^24 atoms of Iron
Answer:
1.31 × 10^47
Explanation:
1 mol of Fe =
[tex]1 \: mol \: of \ fe = 6.02 \times 10 ^{23} \ \\ x \: mol \: offe \: = 7.88 \times {10}^{24} \\ \\ \\ so \: 7.88 \times {10}^{24} \div 6.02 \times {10}^{23} \\ \\ x = 1.31 \times {10}^{47} [/tex]
Naming lonic Compounds
Name the following lonic Compounds using the lonic naming rules. Remember, place the metal's name
first, followed by the non-metal element, replacing the ending with ide"
1.SrBr,
2.NaCl
3. Mgs
4. LIP
5. Ko
6. Ca N,
7. Balz
Answer:
1.storantium bromide
2.sodium chloride
3.magnesium sulphide
4.lithium polymer
5.potassium hydroxide
6.calcium nitride
7.it decomposition of tetrafluroborates and hexaflurophosphates
how does a decrease in potential energy during a chemical rwaction relate to the temperature of the surroundings
Answer: If the potential energy of the reaction system decreases, then kinetic energy in the surroundings increases and the temperature of the surroundings rises
Explanation:
The decrease in the potential energy results in an increase in the temperature of the system and surroundings.
Mechanical energy has been described as the sum of the kinetic and the potential energy in the system. With the increase in the potential energy, there has been a decrease in the kinetic energy and vice versa.
The decrease in the potential energy results in an increase in the kinetic energy of the system. The kinetic energy has been termed as the energy of performing work. The rise in the kinetic energy results in an increase in the work done in the system and there has been an increase in the temperature of the system.
Thus, the decrease in the potential energy results in an increase in the temperature of the system and surroundings.
For more information about the potential energy, refer to the link:
https://brainly.com/question/21288807
As a roller coaster goes downhill.
A. kinetic energy is converted into potential energy
B. potential energy is converted into kinetic energy
C. electrical energy is converted into potential energy
D. potential energy is converted into electrical energy
Explanation:
C electrical energy is converted into potential energy
Answer:
I can confirm it is, Potential energy is converted into kinetic energy.
Explanation:
Please help asap, brainliest to correct answer!!!!
Which of the following statements best defines the actual yield of a reaction?
Select one:
a. The amount of product measured after a reaction
b. The ratio of measured yield over theoretical yield
c. The ratio of measured yield over stoichiometric yield
Answer: A) The amount of product measured after a reaction
A statement which best defines the actual yield of a reaction is "The amount of product measured after a reaction" Hence, Option (A) is correct
What is yield of any reaction?Yield of any chemical reaction gives idea about the amount of product that is produced by the chemical reaction between reactants.
Actual yield gives idea about the how much yield of any product will be produced in the given chemical reaction by using the stoichiometry of the reaction.
Therefore, A statement which best defines the actual yield of a reaction is "The amount of product measured after a reaction" Hence, Option (A) is correct
Learn more about yield here ;
brainly.com/question/25996347
#SPJ5
What happens to the total number of carbon atoms on Earth? Does the total get larger, does it get smaller, or does it stay the same?
Answer:
It stays the same.
Explanation:
What is the number of orbitals in an atom of radon
What is the mass of 2.16 moles of sulfur dioxide (SO2)?
138 g SO₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 2.16 moles SO₂
[Solve] grams (mass) SO₂
Step 2: Identify Conversions
[PT] Molar Mass of S - 32.07 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of SO₂ - 32.07 + 2(16.00) = 64.07 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 2.16 \ mol \ SO_2(\frac{64.07 \ g \ SO_2}{1 \ mol \ SO_2})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 138.391 \ g \ SO_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
138.391 g SO₂ ≈ 138 g SO₂
What is the final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml?
Answer: The final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml is 0.017 M
Explanation:
According to the dilution law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of stock [tex]CuSO_4[/tex] solution = 2.5 M
[tex]V_1[/tex] = volume of stock [tex]CuSO_4[/tex]solution = 5 ml
[tex]M_1[/tex] = molarity of diluted [tex]CuSO_4[/tex] solution = ?
[tex]V_1[/tex] = volume of diluted [tex]CuSO_4[/tex] solution = 750 ml
Putting in the values we get:
[tex]2.5\times 5=M_2\times 750[/tex]
[tex]M_2=0.017[/tex]
Therefore the final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml is 0.017 M
are people partially responsible for acid rain? why or why not
Answer: Because They fall back to earth in the form of rain, sleet, hail, snow and dust. Most acid rain is caused by humans in the form of burning of fossil fuels. A very small percentage of acid rain is caused by natural causes such as volcanoes or wildfires.Human activities are the main cause of acid rain. Over the past few decades, humans have released so many different chemicals into the air that they have changed the mix of gases in the atmosphere. ... In addition, the exhaust from cars, trucks, and buses releases nitrogen oxides and sulfur dioxide into the air.
Explanation:
Why do not all rock types contain fossils?
Excessive heat and pressure can destroy fossils.
Fossils can only be created in certain places around the world.
Fossils cannot be created near volcanoes.
Fossils are too large to be found in igneous and metamorphic rocks.
Answer:
Igneous rocks form from molten rock, and rarely have fossils in them. Metamorphic rocks have been put under great pressure, heated, squashed or stretched, and fossils do not usually survive these extreme conditions. Generally it is only sedimentary rocks that contain fossils.
Explanation:
Hope it helps, some how.
If 0.813 g of O3 reacts with 0.605 g of NO, how many grams of NO2 will be produced?
Answer:
0.74 g O
3
=
48
0.74
=0.0154 mol O
3
0.67 g NO=
30
0.67
=0.0223 mol NO
O
3
is the limiting reagent and NO is in excess =0.0223−0.0154=0.007 mol
Thus, O
3
taken =NO
2
formed =0.0154 mol NO
2
=0.0154×46 g NO
2
Explanation:
I need help with both parts, ill give brainliest and 30 points
Part A: What changes does sugar undergo when heated in a spoon over the flame?
Select one:
A. A physical change, then a chemical change
B. Two physical changes
C. Two chemical changes
D. A chemical change, then a physical change
Part B: What evidence from the experiment and data table best supports your answer to Part A? Use information from the stimulus material and your knowledge of science to support your answer. In your answer, be sure to:
Desribe the evidence that supports your answer to Part A.
Provide your reasoning why that evidence supports your answer to Part A.
Answer:
part a=A. A physical change, then a chemical change
part b:evidence
without physical change any sorts of chemical change do not take place.
for example: when sugar is heated on spoon the physical change takes place in sugar .sugar starts to form liquid from solid.
Answer:
Part A. C would be your answer I think
Sugar is made of carbon, hydrogen and oxygen atoms. When heated over a candle, these elements react with the fire to turn into a liquid. The heat causes the sugar's atoms to combine with the oxygen in the air, forming new groups of atoms. Energy is released in this chemical reaction in the form of smoke and black soot.
Part B. I don't know I just think of the answer... Meaning I'm good and science, Chemistry and all that good stuff ;-;
Explanation:
which is colder, -30.0 F or 225.0 K?
Answer:
-30.0 F
Explanation:
225 K is - 48.15 Celsius
-30.0 F is - 1 Celcius
What property of water is primary for living organisms? (SC.6.E.7.4) *
It is odorless.
It does not conduct electricity.
It is tasteless
It is liquid at most temperatures on Earth.
*20 points* I wil mark brainliest
Answer:
It is liquid at most temperatures on Earth.
Can any wan help pls pls
Answer:
1) food molecules enter receptors .....
2) The sensory receptors sends the message....
3) The message reaches the brain
4) the brain procces the information it recieved...
5) The brain stores the info ...
6) The brain retrieves the info . ....
(I hope its clear ! I hope its right too ;) )
ammonia gas occupies a volume of 57.9 L at a pressure of 532.4atm. if the pressure were lowered to 256.8atm,what would the new volume be
Answer:
683838447745 anmmlllkkkkk
The energy associated with a current is called____________
(A) mechanical energy
(B) magnetism
(C) geothermal energy
(D) electrical energy
Answer:
D. Electrical energy
Explanation:
I assume you are talking about an electrical current.
(These are by what I know and are simplified, not an exact definition)
A. Mechanical energy is energy that something has because of motion.
B. Magnetism is the attracting and repulsing forces between magnets.
C. Geothermal energy is heat inside of the Earth. Used as source of power.
D. Electrical energy is the result of an electric charge.
volcanoes tend to erupt at places where
A two plates collide
B two plates rube past each other
C one plate move under another
D one plate moves away from another
Answer:
Explanation:
b. rub past each other.
Answer:
When 2 plates collide
Explanation:
My mom is a science teacher
What is a membrane?
A: Another term for a cells nucleus
B: a sort of “skin that encloses something
C: A type of genetic material
D: A single-called organism
16. Copper is made by the electrolysis of copper sulfate solution
Look at the diagram of the apparatus used in this electrolysis.
6 volt DC
power supply
Copper sufate solution
Carbon (graphtel electrodes
Desenbe what you would see at each of the electrodes
Answer:
SORFRRRRRRRRRRRRY!
Explanation:
Please do not ignore, I don’t know how to find the last part so can you please explain it to me? I’m having trouble with that
Answer:
Neutral
Explanation:
U need to count the number of protons and electrons and see which has more...
Here the atom is neutral cause the electrons and protons are equal and cancell each other out.
I hope im right!!
Answer:
To find the overall charge subtract electrons from protons
So in this example its 0
Explanation:
4 Protons
4 electrons
so basically
+4-4=0
If 0.332 mol of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate will be produced in the reaction?
Answer:
53.6 g
Explanation:
Step 1: Write the balanced equation
2 Zn + Pb(SO₄)₂ ⇒ 2 ZnSO₄ + Pb
Step 2: Calculate the moles of ZnSO₄ produced from 0.332 moles of Zn
The molar ratio of Zn to ZnSO₄ is 2:2. The moles of ZnSO₄ produced are 2/2 × 0.0332 mol = 0.0332 mol.
Step 3: Calculate the mass corresponding to 0.332 moles of ZnSO₄
The molar mass of ZnSO₄ is 161.44 g/mol.
0.332 mol × 161.44 g/mol = 53.6 g
100 points to whoever can give me seinen manga suggestions. Vagabond, Berserk, Oyasumi Punpun, Homunculus, 20th Century Boys are some I’ve already read. Avoid those
Explanation:
sorry I really need the points in so sorry have a good day
Match the following vocabulary words with the correct definitions.
1. amount of matter in an object
2. anything which has mass and occupies space
3. measurement of the pull of gravity on an object
4. molecule with different atoms chemically united
5. chemical combination of two or more atoms
6. smallest unit of matter
Compound
Matter
Weight
Mass
Atom
Molecule
Answer:
1 mass
2 matter
3 weight
4 molecule
5 compound
6 atom
A nickel is placed in a cup of boiling water. Predict whether a solution will form.
I really don’t know
Me without you is like a nerd without braces, A shoe without laces, aSentenceWithoutSpaces.
Answer:
LOL
Explanation:
What is it called when two or more atoms are chemically bonded together?
a.Electron
b.Two atoms
c.Molecule
d.Material
Answer:c
Explanation: A molecule is two atoms bonded together
Whose atomic theory explains how atoms emit (release) and absorb light?
O Bohr's
O Dalton's
O Rutherford's
O Thomson's
Answer:
Bohr's model of hydrogen atom
I hope this answer is correct
Answer:
Bohr's
Explanation:
This is IXL pls hurry pls! SOS major
Answer:
the same as
Explanation:
that's what makes the most since to me but i may be wrong