Answer:
oxygen is colorless, odorless, tasteless and soluble in water
Explanation:
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Answer:
Scientists have made serious attempts to test this hypothesis, but no correlation has ever been found. Scientific disciplines based on hypothesis but with no consistent body of supporting evidence are called pseudoscience. Astrology is one of them. Effects of astrology do not exist in the Universe
Explanation:
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The modern periodic law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.
Modern periodic table is based on atomic number. Thus, the properties of elements are related to their atomic number or electronic configuration. Elements are arranged according to increasing order of atomic number. Elements with similar properties occur at regular intervals in the periodic table. The cause of periodicity in properties is due to recurrence of similar outer electronic configuration at certain regular intervals.
Answer:
NaHCO3 + HCl --> NaCl + CO2 + H2O
Explanation:
NaHCO3 which is an acidic salt because of the replaceable H+ (Bronste lowry acid), by definition acid dissociates in water to release a proton.
NaHCO3 dissociates in water to give Na+, H3O+ and HCO3-
Stomach acid which is HCl also dissociates in water to give H3O+ and Cl-
The H3O+ and HCO3- combines briefly to form a weak carbonic acid almost immediately, which then further dissociates to form H2O and CO2. CO2 is burped out from the mouth.
Na+ and Cl- combines to form NaCl in water which is a table salt solution.
Below is an attachment containing the step by step reactions
Answer:
It will lead to overestimation of the percent recovery
Explanation:
The percent recovery refers to the percentage of the pure compound recovered after a chemical process. It is a ratio of the pure compound recovered to the original substance multiplied by 100%.
If the sample was incompletely dried and the recrystallization solvent is still present, the percent recovery will be overestimated and we will have a value that is greater than the accurate percent recovery due to solvent impurities present.