It depends on the direction of the arrow.
If the arrow goes like this ---> the reactant would be 2Fe2O3
If the arrow goes like this <--- the reactants would be 4Fe + 3O2
YOU DO:
1) What volume of 0.25M lithium fluoride solution can be made by dissolving 5.0 g lithium fluoride, LiF?
Answer:
0.7712 L
Explanation:
Molarity = 0.25M
Volume = ?
Mass = 5.0 g
The relationship between these quantities is given as;
Molarity = Number of moles / Volume
Volume = Number of moles / Molarity
Number of moles = Mass / Molar mass
Molar mass of LiF = 25.939 g/mol
Number of moles = 5 / 25.939 = 0.1928 mol
Volume = 0.1928 / 0.25 = 0.7712 L
I would appreciate help on writing an equalibrium constant expression.
Explanation:
it would be
[tex]kc = (products) \div (reactants) \\ kc = \frac{nh3)^{2} \times (co2) \times (h2o)}{(nh4)^{2}co3 }[/tex]
this the expression however when you are working out Kc do not include nh4^2co3 as it is a solid and it's concentration remains constant so remember to remove the nh4^2co3 and usage would just have the top part to work out ok
Based on Avogadro's principle, the coefficients in chemical equations involving only gases represent two types of quantities. Name the two quantities.
Answer:
subject
Chemistry, 08.04.2020 04:39 dnprops1544
Based on Avogadro's principle, the coefficients in chemical equations involving only gases
represent two types of quantities. Name the two quantities.
Explanation:
Answer: Molar ratio is the quantity which will correctly convert between two different substances.
Answer: Option B
Explanation:
Molar ratio is used to determine the number of moles of reactants required to convert to desired number of moles of the products and vice versa. As moles are the coefficient written in any chemical equation. The ratio of the number of moles of the reactants to the number of moles of the products will help to determine the molar ratio.
This molar ratio is used as the conversion factor to determine number of moles required in the reactant side for the reactants to form a desired product of desired moles. We can also determine the number of moles utilized from the reactants from the moles obtained in the products using this molar ratio conversion factor.
The process by which oxygen reacts with iron minerals in rock to form rust is called
Explanation:
your answer is oxidation
Answer:
Oxidation
Explanation:
Which statements describe the motion of the object represented by the graph? Select three options.
The object is moving away from the origin.
The object is moving towards the origin.
The object started at the origin.
The object started at 2 meters.
The object is traveling at a constant velocity.
Answer:
The object is moving away from the origin
The object started at 2 meters
The object is traveling at a constant velocity
Explanation:
Statements which best describe motion of object represented by graph are statement A,D and E.
What is motion?Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.
Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.
Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic mechanics is based on modern kinematics.
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What is the molecular formula of a compound with an empirical formula P2O5 and a gram-molecular mass of 284 grams? And why?
Identify which is the result of a physical rather than
a chemical change?
Answer:
b
Explanation:
what properties of aluminum make it particularly useful in drinking cars
Answer:
in doesn't rust which sends meatel into the drink
Explanation:
u are welcome
Write the word and balanced chemical equations for the reaction between:
Sulfuric acid + aluminum hydroxide
Answer:
Alumminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3+H2SO4-->Al2(SO4)+6H2O.
Explanation:
plz mark as brainlist
Describe two patterns in the periodic table?
Answer:
Patter 1: Ionization Energy Decreases going down a group
Pattern 2: Ions tend to gain/lose the least amount of electrons
Take oxygen, for example. Oxygen has 8 electrons. To become like a noble gas it could either gain two to become like neon or it could lose six to become like helium. So what will oxygen do—gain two or lose six? As a general rule, atoms will gain or lose the fewest number of electrons possible.
Explanation:
Approximately what is the minimum temperature needed to dissolve 10 g of KNO3 in 100 g H2O?
Round your answer to the nearest whole number and type in the number only; no units.
Answer:(a) Potassium nitrate will begin to crystallise at about 56 °C, when its solubility is 100 g/100g water.
Explanation:
What is acetic acid (CH3COOH)
Answer:
Acetic acid (CH3COOH), also called ethanoic acid, the most important of the carboxylic acids. A dilute (approximately 5 percent by volume) solution of acetic acid produced by fermentation and oxidation of natural carbohydrates is called vinegar; a salt, ester, or acylal of acetic acid is called acetate.
Answer:
the acid that gives vinegar its characteristic taste. The pure acid is a colourless viscous liquid or glassy solid.
Explanation:
HOPE IT HELPS YOU......
Which has a lower electronegativity and why? N or P? Use 'force of attraction' in your answer
Answer:
The electron sets divided among two particles are not really shared similarly. For instance, while the common electron sets are shared similarly in the covalent security in Cl2, in NaCl the 3s electron is taken from the Na iota and is fused into the electronic design of the Cl molecule - and the compound is most precisely portrayed as comprising of individual Na+ and Cl− particles (ionic holding). For most covalent substances, their bond character falls between these two limits. We showed beneath, the bond extremity is a helpful idea for portraying the sharing of electrons between molecules inside a covalent bond:
A nonpolar covalent bond is one in which the electrons are shared similarly between two particles.
A polar covalent bond is one in which one iota has a more noteworthy fascination for the electrons than the other molecule. On the off chance that this overall fascination is sufficiently incredible, the bond is an ionic bond.
Explanation:
What is the correct formula for the compound formed by Mg and F?
MgF
Mg2F
Mg2+F
MgF2
Look at picture
ASAP please will mark as brainlist don’t got much time
Magnesium phosphate
Find Similar Structures
Molecular Formula
Mg3(PO4)2 or Mg3O8P2
Synonyms
magnesium phosphate
More...
Molecular Weight
262.86 g/mol
Question: If red dye is added to cold water and blue dye is added to warm water, which dye will
spread out quicker?
Answer:
Blue dye spreads out quicker
Explanation:
This is because the dye gets spread out by water molecules. Warm water has faster moving water molecules than cold water.
A tall plant (Tt) is crossed with a short plant (tt). What is the phenotype of the offspring?
Group of answer choices
100%
75% tall; 25% short
25% tall; 75% short
50% tall, 50% short
Why is there a border between light and dark on the moon
Answer:
because the sun illuminates the half of the moon that's facing it leaving the other half dark
Which of the following conditions must be met for a volume ratio to be created from a balanced chemical equation? (3 pm
O Changing temperature and pressure
Constant temperature and pressure
Changing temperature and constant pressure
Constant temperature and changing pressure
Answer:
The answer will be Constant temperature and pressure
Explanation:
Just took the test and it was correct 100%!!!
Answer:
Constant temperature and pressure
Explanation:
took the test
I am the life cycle that contains tiny undeveloped plants,
but I still have enough food for growth. Who am I?
Please help PLEASE
Which of the following is NOT an example of a change of state? *
HELP PLSSSSSS
Plants using photosynthesis to produce food.
Liquid water in perspiration changes to a gas when it evaporates.
An ice cream cone melts, forming a liquid.
Answer:
Plants using photosynthesis to produce food.
Answer:
the icecream one is not an example
pls help me!!!!
A.Ants and tarantulas
B.Rats and Snakes
C.Cacti and Sagebrush
D.Hawks and Coyotes
Answer:
C since both are plants which are the producers
Answer:
Cacti and Sage Brush
Explanation:
because they are plants so they produce food on their own
Story that ends in i have never found such a kind person ever since
Answer:
I was traveling on a train where I fell asleep. someone stole my luggage in which I had money and other essentials. when the ticket checker arrived a lady paid my fine. she helped me a lot. when I told her about being robbed she helped me and took me to the police station and I found my bag. I insisted she take the money she paid for my fine but she said that in return you too help someone."I have never found such a kind person ever since.".....
Explanation: I think this is what you are looking for. Hope this helps.
*2Al(OH), + 3H,SO, Al(SO4)2 + 6H2O
reaction type
Work = Force X Distance A dog pulls a ball with 5N of force for 4 m. How
much work did the dog do?*
Answer:
W = 20 J
Explanation:
Given that,
The force acting on the dog, F = 5 N
Distance covered, d = 4 m
We need to find the work done by the dog. The work done by an object is given by :
W = Fd
Put all the values,
W = 5 N × 4 m
W = 20 J
So, 20 J of work is done by the dog.
Compare and contrast the Ionization energies of groups 1&2 (Alkali and Alkaline metals) with the Ionization energies of groups 16&17 (Oxygen family and Halogens)
Answer:
Ionization energy is the energy required to remove an electron from a specific atom. It is measured in kJ/mol, which is an energy unit, much like calories. The ionization energies associated with some elements are described in the Table 1. For any given atom, the outermost valence electrons will have lower ionization energies than the inner-shell kernel electrons. As more electrons are added to a nucleus, the outer electrons become shielded from the nucleus by the inner shell electrons. This is called electron shielding .
Explanation:
a little summary
Ionization energy refers to the amount of energy needed to remove an electron from an atom.
Ionization energy decreases as we go down a group.
Ionization energy increases from left to right across the periodic table.
When the Hubble Space Telescope was first launched, it was the most advanced technology of its kind. Astronomers and astrophysicists all over the world celebrated its launch. Why was this event so important to these scientists?
1. Hubble provided a new way to study Earth's atmosphere.
2. Hubble proved that we could launch a telescope into space.
3. Hubble provided scientists with data about the Universe they had previously been unable to collect.
4. Hubble was able to collect physical samples from celestial bodies they had previously been unable to reach.
please help me
Answer:
C
Explanation:
its correct
''Hubble provided scientists with data about the Universe they had previously been unable to collect.'' is the right statement.
Benefits of Hubble Space TelescopeHubble Space Telescope helps the scientists to collect more data about the Universe which they had previously been unable to collect due to lower range of telescope.
This telescope has longer range and can see distant objects very clearly in the space so we can conclude that ''Hubble provided scientists with data about the Universe they had previously been unable to collect.'' is the correct statement.
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Which object would have a greater velocity change?
Answer:
The object with less mass will have a greater change in velocity
Explanation:
Answer:
the one with the smaller object mass becaise you get more force upon impact with less effort to move
How many atoms for each element in this compound:
Pb3(PO4)2
Pb =
P=
O=
Answer:
In the compound Pb3(PO4)2, there are 3 Pb atoms, 2 P atoms, and 8 O atoms.
Let me know if this helps!
There are 3 atoms of pb(Lead), 2 atoms of P(Phosphorus) and 8 atoms of O(Oxygen) are present in Pb3(PO4)2.
What is an atoms?An atom is the smallest constituents of matter that can neither be created nor be destroyed.An atom It consists of a central nucleus, usually surrounded by electrons. Each electron is negatively charged. The nucleus is positively charged, and contains relatively heavy particles known as protons and neutrons.What are Compounds?
A compound is a combination of atoms of same or different types of an element in a fixed ratio.
In the given question Pb3(PO4)2 is a compound of lead phosphate which is made up of 3 atoms of pb(Lead), 2 atoms of P(Phosphorus) and 8 atoms of O(Oxygen).
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Write the chemical formula for each:
ammonium nitrate
iron(II) sulfide
magnesium hydroxide
titanium(II) chloride
cobalt(III) oxide
potassium sulfide
barium acetate
magnesium bromide
lithium carbonate
potassium permanganate
Answer:
Ammonium nitrate is NH4NO3
iron(II) sulfate is FeSO4
magnesium hydroxide is MG(OH)2
titanium(II) chloride is TiCI2
cobalt(III) oxide is Co2O3
potassium sulfide is K2S
Barium acetate is C4H6BaO4
magnesium bromide is MgBr2
lithium carbonate is Li2CO3
potassium permanganate is KMnO4
Which is a TRUE statement about
London Dispersion Forces?
ELECTRON moving causes partial
positive & negative charges creating
attraction
PROTON movement causes partial
positive & negative charges creating
attraction
Answer:
The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. Dispersion forces are present between any two molecules (even polar molecules) when they are almost touching.
Thus PROTON movement causes partial positive & negative charges creating
attraction will be crrt