When the equation H2 + Fe3O4 = Fe + H2O is completely balanced using the smallest whole numbers, the coefficient oH2 would be A.) 1 B.)2 C.) 3 D.) 4
Answer:
H2 would have a coefficient of 2.
Explanation:
According to the balanced chemical equation, the coefficient of hydrogen is 4.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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HELLP: WHAT IS THE 10 ORGANIZATIONS OF MATTER???
WILL GIVE BRAINLEST
molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.
How many Carbon atoms are shown in the reactants? How many C atoms are shown in the products?
Answer:
Q) How many Carbon atoms are shown in the reactants
Ans) The reactants have one carbon atom
Q) How many C atoms are shown in the products?
Ans) there is one atom on the product side
Mars is red due to red soil rich in iron oxide (rust). Is the oxidation of soil to rust a PHYSICAL or CHEMICAL change How do you know?
OMG PLEASE HELP ME :(
Answer:
D) The gravity on the moon is one sixth the gravity of Earth.
Explanation:
Western regions Facts
What atoms in water are attracted to Chlorine?
Answer: hydrogen and oxygen
Explanation:
if a magnet is broken which one of the following remains unchanged in each part mass, magnetisation, length
Explanation:
magnetization
coz it will still have two pols that is north and south pole
When combined, two gases have a pressure of 75.54 atm. If one has has a pressure of 2.90 atm, what is the pressure of the second gas?
Your answer must me rounded to the second decimal place. (Dalton's)
Answer:
The pressureof the secondone is 2.5 atm
Explanation:
hope this helps
what is gold on the periodic table of element
Answer:
Gold is element 79 and its symbol is Au.
Identify the reactant(s) in the chemical reaction, CO2 + H20 --> H2CO3. *
A. CO2, H20, and H2CO3
B. CO2 and H20
C. H2CO3
Answer:
The correct answer is B. From the chemical reaction, the reactants are carbon dioxide and water. Reactants are the substances that take part in the chemical reaction which, as a result, produces new substances called the products
Explanation:
Hope it helps
In a water molecule, what type of bond forms between the oxygen and hydrogen atoms
How many moles are in 5.30 X 1023 molecules of H2O?
Answer:
0.880 (0.88039867109 to be exact)
Explanation:
To convert from molecules to moles, simply divide by Avogadro's number which is 6.02 x 10^23
So, 5.30x10^23/6.02x10^23 = 0.880
true or false : Color Changes are used to show reaction completion
Answer:
True
Explanation:
It means the reaction is occuring.
Giving brainliest! Please help pleaseeee
Answer:
Id want to know how the nucleus looks like upclose, is it really that neutrons and protons are bond together, or are they just sticking in together. I'd also wanna look at electrons, or even possible hold them so that i can see the mass it really has
Explanation:
The maximum water vapor that air can hold at 30°C is about 30 grams/cubic meter. If the humidity of the air is currently 6 grams/cubic meter at the same temperature, the relative humidity is
what is the formula of the compounds in B
pls help
Answer:
PCl3
Explanation:
The molecular formular of a compound shows the exact number of atoms of elements present in the compound. In this illustration, there is one atom of P and 3 atoms of Cl.
The formular is given as; PCl3
Answer:
PCl³
Explanation:
because there are 1 phosphorus atom and 2 chlorine atom.
What is the correct IUPAC name for the acid: H2Lv
Which of the following elements has the lowest ionization energy?
Question options:
A)
Hydrogen
B)
Beryllium
C)
Argon
D)
Helium
Answer:
A
Explanation:
It has the lowest ionisation energy
Answer:
Beryllium
Explanation:
An organism from the past that is related to all the organisms in the group is called?
Answer:
phylogenic trees/phylogeny
Explanation:
the evolutionary history and relationship of an organism or group of organisms is called its phylogeny
How many moles of gas would occupy 22.4 L at 273K in one arm?
Answer:
1 mol
Explanation:
Using the general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the provided information in the question;
V = 22.4L
T = 273K
P = 1 atm
R = 0.0821 Latm/molK
n = ?
Using PV = nRT
n = PV/RT
n = (1 × 22.4) ÷ (0.0821 × 273)
n = 22.4 ÷ 22.4
n = 1mol
A cell is placed in a salt solution that has the same concentration as the inside of the cell. What will happen to the cell?
A) The cell will contract.
B) The cell will expand slightly.
C) The cell will burst.
D) The cell will remain the same size.
Answer:
d
Explanation:
Look at this glass of soda. Use your knowledge of thermal energy transfer to explain how heat is affecting the following things: ice, soda, glass, and surrounding air.
Explanation:
Technically, the ice cube melts because the water cools down. This may sound ridiculous at first, but you must consider the fact that the ice melts because it has drawn "heat" (energy) from its surroundings. The "surroundings" being the air and water that surround it (but the water's more important since it's a better conductor of thermal energy).
The surrounding air looses energy while the ice in the glass gains energy.
We know that thermal energy is transferred from a hotter body to a cooler body. If we look as the glass, we will notice that the surrounding air has a greater energy compared to the contents of the glass. The surrounding air looses this energy resulting in the condensation of water vapor in air around the glass.
Similarly, the ice in the glass gains energy and melts. A change of state occurs from solid to liquid as a result of the energy absorbed from the surrounding air.
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Please help fast. I will give brainliest!
Answer:
c=-1+x=varible+a=(5)^3
Explanation:
facts
Calculate the number of Oxygen atoms in Imole of 02
Answer:
two oxygen atoms
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
Explanation:
Select the most likely product for this reaction:
Upper K subscript 2 upper C upper O subscript 3 (a q) plus upper C upper O subscript 2 (g) right arrow question mark.
K2CO3(aq) + H2O(l)
K(s) + H2(g) + O2(g)
K(s) + CO3(g) + H2
Answer:
The answer is A- K2CO3(aq)+H2O(I)
Explanation:
The person who made this question gave the answer so...eh??
Answer:
A) K2CO3(aq) + H2O(l)
Explanation:
What is the relationship between electrons and elements with
negative oxidation numbers? between electrons and elements
with positive oxidation numbers?
Explanation:
The higher its electronegativity, the more an element attracts electrons. The atom with higher electronegativity, typically a nonmetallic element, is assigned a negative oxidation number, while metallic elements are typically assigned positive oxidation numbers.... Hope it is useful brainliest plz if it was useful....
The relationship between electrons and oxidation number has bee the negative oxidation number implies the gain of the electron, while positive oxidation number implies the loss of electron by elements.
The oxidation number has been defined as the number of electrons lost or gained by an element to form a chemical bond. The elements that lose electrons are assigned positive oxidation number.
The elements that gain electrons to form a chemical bond are assigned a negative oxidation number.
The relationship between electrons and oxidation number has bee the negative oxidation number implies the gain of the electron, while positive oxidation number implies the loss of electron by elements.
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How is Earths crust recycled?
I think it's the last one
(and I'm so sorry if I'm wrong)
Answer:
The answer is D
Explanation:
The rest of them are not cycles.
What do you understand by a chemical reaction
Answer:
A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. ... A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Cells are made of many parts, or , that help the cell do its job. Each cell organelle has a specific function, or
Answer:
Organelles; role.
Explanation:
A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life. A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells. Generally, cells have the ability to independently replicate themselves. In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles with their respective functions in all living organisms such as trees, birds, and bacteria include;
1. Nucleus : it controls all the activities taking place in the cell and the synthesis of proteins.
2. Mitochondria : it provides all the energy required in the cell by transforming energy forms.
3. Lysosomes : they are responsible for absorbing materials and breaking the materials taken in by the cells.
4. Chromosomes : they give sets of instructions for the synthesis of products.
5. Ribosomes : they are involved in the build up of proteins.
6. Endoplasmic Reticulum : this is where the ribosomes perform their tasks.
7. Cytoskeleton : they help to maintain and support the shape of the cells.
8. Vesicles : they ensure proteins are properly transported to the right and exact location.
9. Golgi apparatus : it prepares the protein for export by chemically tagging them.
10. Cell membrane : is the wall of the cell and typically controls what leaves and enters the cell.
Hence, cells are made of many parts, or organelles, that help the cell do its job. Each cell organelle has a specific function, or role.