A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side
A chemical symbol is a notation of one or two letters representing a chemical element
A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element.
Alkali metals have only one valence electron and so have low binding energy to the metallic crystal lattice. ... A lower amount of energy needed to break a bond means a lower melting/boiling point.
Answer:
1.3M
Explanation:
Convert from grams to moles:
molar mass of HCl = 1.01g(molar mass of H) + 35.45g(molar mass of Cl) = 36.46g HCl
1.2g HCl (1mol HCl/36.46g HCl)
= .0329 mol HCl
Molarity = mol/L (important formula for concentration)
Plug your values in:
Molarity = .0329mol/.025L
1.317M - but you used two significant figures in the question, so:
1.3M
The difference between a substance and a mixture is that a substance is one of a kind, a material of the same composition throughout, on the contrary, a mixture is one or more different substances brought together and mixed together without changing the nature of each single substance.
One way to test it is to take two substances like sand and table salt. They should each be in granular form and in adequate amount to mix. Neither substance has changed after mixing the two. Even though it may not be easy or convenient to accomplish, each substance could be separated out from the mixture.
When it comes to two substances in lump form, it would not be a mixture when one lump is positioned next to the other lump because there are not enough pieces to combine.
However, there could be a mixture of three substances, like sand, table salt and graphite powder and there could be a mixture with four substances, etc., ad infinitum.
Mixtures are of solid substances in general. On the other hand, one starts referring to solutions when liquids are involved. Gases can be a mixture like for example, air is a mixture with nitrogen, oxygen, argon, etc.
A gas bottle contains 8. 61×1023 oxygen molecules at a temperature of 359. 0 k then the thermal energy of the gas is 6.35KJ.
<h3>What is thermal energy? </h3>
Thermal energy is the energy contained within a system which is responsible for its temperature. Heat is also termed as flow of thermal energy.
Thermal energy is directly proportional to the temperature. As temperature increase thermal energy increases.
Given,
temperature = 395K
Number of oxygen molecules= 8.61 × 10^(23)
Firstly we will calculate the number of moles = N/A
where A is the avagadro number = 6.022 × 10^(23)
number of moles = 8.61 × 10^(23)/6.022 ×10^(23)
number of moles = 1.42moles
Using the energy equation,
E = 3/2 × nRT
where R is the gas constant = 8.314J/molK
E = 3/2 × 1.42 × 8.314 × 359
= 6357.4J
= 6.35KJ
Thus, we found that the thermal energy of the gas is 6.35KJ.
learn more about thermal energy:
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