Answer: Vitamins
Explanation:
they are nutrients that are made by living things
Mass of Neon : = 24.21564 g
Given
1.2 moles of Neon
Required
mass of Neon
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
Mol = mass : Molar mass
so mass of Neon(MM=20,1797 g/mol) :
= mol x MM
= 1.2 x 20,1797
= 24.21564 g
According to the stoichiometry of the reaction of mercury(II) oxide 1.477 g of oxygen would be produced by heating 20 g of mercury (II) oxide if 18.6 g of mercury is produced.
Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
433.18 g mercury (II) oxide gives 32 g oxygen thus, 20 g of mercury (II) oxide will produce 20×32/433.18= 1.477 g of oxygen.
Thus, 1.477 g of oxygen would be produced by heating 20 g of mercury (II) oxide if 18.6 g of mercury is produced.
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Answer:
K2CO3 dissociates more ions than Kr
Explanation:
A solution conducts electricity because of much supply of ions an example is strong electrolytes. A solution contains both positive and negative ions and the ability of these ions to move freely allows them to carry positive and negative charges thereby conducting electricity. A solution such as K₂CO₃ dissociates more ions than KBr, therefore it is a better conductor of electricity. Neutral solutions do not conduct electricity.
Answer:
b and d are physical
a and c are chemical
hope dis helps
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Answer:
Burning of a House: Chemical Change
cutting candle wax: physical change
buring a candle: chemical change
keying a car: physical change.
hydrogen atom forms covalent bonds with more than one atom.
hydrogen atom of a polarized molecule bonds with an electronegative atom
hydrogen atoms form an ionic bond with one other atom
Answer: hydrogen atom of a polarized molecule bonds with an electro negative atom.
Explanation:
Hydrogen bonds are special type of dipole dipole forces which are formed when hydrogen bonds with an electro negative element. Hydrogen bonds are strongest type of bonds .Example: Bond between Oxygen of one water molecule to the hydrogen of another water molecule as shown in the image below.
Covalent bonds are formed by sharing of electrons among non metals.
Ionic bond is formed by transfer of electrons between metals and non metals.
Answer:
No because hydrogen can only form these bonds with highly electronegative atoms.
Explanation: