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Georgia [21]
3 years ago
14

Which unit is used for measuring atomic mass?

Chemistry
1 answer:
Neko [114]3 years ago
8 0

Answer: Amu

Explanation:

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What is the number of electrons in oxygen
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Answer for your question is;

2,6 = 8
The first shell is 2 electrons the other shell is 6 electrons
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How is the information about cats found in myths and fairy tales and legends different from information gathered through science
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What would happen if the aspects that allow to maintain the characteristics of the states were altered?​
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3 0
3 years ago
What is the enthalpy of formation (?H?f) of NaHCO3(s) from its constituent elements.
vova2212 [387]

Answer:

Enthalpy of formation = -947.68KJ/mol

Explanation:

Enthalpy of formation is the heat change when one mole of a substance is formed from its element in its standard states and in standard conditions of temperature and pressure. it may be positive or negative, if positive, it is an endothermic reaction where the heat content of the product is greater than that of the reactants, and if negative, it is exothermic reaction - where the heat content of the reactants is greater than the products. the enthalpy of formation is measured in KiloJoule/Moles (KJ/Mole).

From the value of the enthalpy of formation of NaHCO3, it shows that the reaction is exothermic, that is the formation of NaHCO3 from its constituents elements. As such, the heat content of the reactants is greater than the products.

The step by step explanation is shown in the attachment.

7 0
3 years ago
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In the forward reaction of this equilibrium, which substance acts as the brønsted-lowry base? h2s(aq)+ch3nh2(aq)⇋hs−(aq)+ch3nh+3
spin [16.1K]
<span>Answer: Bronsted base is something that accepts proton (H+) and acid is something that donates H+ so here CH3NH2 will be the base and H2S is the acid.</span>
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