Given the balanced equation representing a reaction:6Li +N2 --> 2Li3N
Which type of chemical reaction is represented by this equation?
(1) synthesis (2) decomposition
(3) single replacement (4) double replacement
Answers
Answer : The correct option is, (1) synthesis
Explanation :
Synthesis reaction : A type of chemical reaction in which multiple reactants combine to form a single product.
It is represented as,
Decomposition reaction : A type of chemical reaction in which a single reactant decomposes into two or more products.
It is represented as,
Single replacement reaction : A type of chemical reaction where the more reactive element replace the less reactive element.
It is represented as,
(A is more reactive element and B is less reactive element)
Double replacement reaction : A type of chemical reaction in which a positive cation and a negative anion of two reactants exchange their places to form two new products.
It is represented as,
(A and C are the cations, B and D are the anions)
The given balanced reaction is,
The given reaction is an example of synthesis reaction in which lithium combine with the nitrogen to form a single product as lithium nitride.
Hence, the correct option is, (1) synthesis reaction
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The heat of formation of Fe2O3(s) is –826.0 kJ/mol. Calculate the heat of the reaction 4Fe(s) + 3O2(g) → 2Fe2 O3(s) when a 53.99-g sample of iron is reacted.
Help please!!!! I only have a couple mins
Answers
The length measurement in kilometers will be -
92.25 x 10⁻³ Kilometers.
We have length measurement of 92.25 m.
We have to determine the number of kilometers in this much length.
How many maters are there in one kilometer ?
In 1 km there are 1000m
According to the question -
Length measurement = L = 1 meter
In kilometers, the length will be = 1 /1000 x 92.25 =
92.25 x 10⁻³ Kilometers.
Therefore, the length measurement in kilometers will be -
92.25 x 10⁻³ Kilometers.
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92.25m= ?
We cross multiply
92.25/1000
= 0.09225
Therefore, 92.25m = 0.09225km
Answers
The name of the compound given in the question is nitrogen trifluoride.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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Answer:
Nitrogen Trifluoride
Explanation:
Answers
Answer:
CaCO3 + 2HCL -> CO2 +H2O + CaCl2
Explanation:
When balancing an equation, it is important to first ensure that the chemical formulas in the equation are correct. In the above equation, the first modification required is for CaCl to be corrected to CaCl2. This is because the calcium ion has a charge of 2+ which has to be balanced by 2 chloride ions, each of charge 1-
Next, the overall atoms of the equations should be balanced. The number of atoms of each element on the side of reactants should be equal to their number on the side of the products. In this case, the number of HCL molecules should be 2.
Before balancing equation:
Reactants: Ca: 1, C: 1, O: 3, H: 1, Cl: 1
Products: Ca: 1, C: 1, O: 3, H: 2, Cl: 1
After balancing equation:
Reactants: Ca: 1, C: 1, O: 3, H: 2, Cl: 2
Products: Ca: 1, C: 1, O: 3, H: 2, Cl: 2
:CaCO3+2HCl---> CO2+ H2O+CaCl2
Answers
pH = 5.2
[H+] = ?
Knowing that: (Equation to find the pH of a solution)
Solving:
Knowing that the exponential is the opposite operation of the logarithm, then we have:
Answers
(D.)Abrasion
Answers
if we change these values into Kelvin then
melting point of water is 273.15 K and boiling point is 373.15 kelvin..
for melting it is necessary for ice to get warm so it attains heat 10 F to 32 F...
then ice melts but during this temperature remains constant..
the energy required for melting is 333 kJ/Kg K
then water is warmed at 305 Kelvin.... :)