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Chemistry

Delve into the study of matter, its properties, composition, structure, and the changes it undergoes during chemical reactions. Chemistry is the central science connecting other scientific disciplines.

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Questions
Q: What is a sentence that uses the word pigment
2 answers
Q: Can reagent bromthymol blue or phenolphthalein could be considered to be an acid indicator
2 answers
Q: How are new kinds of matter formed in a chemical change
1 answer
Q: Can citric acid be stored with chromium metal on a shelf
1 answer
Q: What happens to water molecules as the temperature of water drops below 4 degrees Celsius but before it reaches 0 degrees Celsius
1 answer
Q: Can diamonds be destroyed
3 answers
Q: Which pure substance can be classified as an element
2 answers
Q: What family is xenon a part of
1 answer
Q: What is the oxidation number of phosphorus in the PO3-4 ion
1 answer
Q: What element has 2 valence electrons and 4 energey levels
2 answers
Q: Can you describe condensation
1 answer
Q: What is the total number of charges in an ionic compound
1 answer
Q: What is the nature of an atoms electrons
1 answer
Q: Would you expect the formula S8 to represent a compound to an element
2 answers
Q: Why are glass rods used in labs for stirring
2 answers
Q: What salt is formed when copper oxide reacts with ethanoic acid
1 answer
Q: What is the equivalent weight in g per eq of H2C3H2O4
5 answers
Q: What is the acid dissociation constant for an acid at equilibrium HX ----- H (spuare Plus) plus x -
2 answers
Q: What is a moisture indicating sight glass useful for
1 answer
Q: Are the chlorophyll molecules in PSI and PSII the same
1 answer
Q: Which one of these is a possible indicator of a suspicious letter or package
3 answers
Q: What describes a heterogeneous mixture
4 answers
Q: What statements about the work of chemists is true
2 answers
Q: Does acetic acid have color and smell bad
3 answers
Q: Albert remembers his teacher stressing that the arrow in a chemical equation does not mean equal instead he said the arrow meant what
1 answer
Q: Is high speed steel ferrous non ferrous or is it an alloy
1 answer
Q: What had Priestley done to introduce the mint plant with out disturbing the experimental set up
1 answer
Q: Which compound contains both ionic and convalent bonds
1 answer
Q: What color tube is use forestradiol
1 answer
Q: What is the oxy acid
2 answers
Q: Why don't ionic bonds conduct electricity in solid form
1 answer
Q: Is smoke heterogeneous or homogeneous
2 answers
Q: What is cesium' me ion name
1 answer
Q: Which elements are present in sulfur dioxide
1 answer
Q: Petroleum is a mixture consisting mostly of
2 answers
Q: Where does the chemical energy came from
1 answer
Q: Why is brown stain not a test for bismuth ion
2 answers
Q: Soda ash or sodium carbonate is extracted from the ashes of certain seaweeds
1 answer
Q: Does sodium and chlorine have similar or different reactivities
1 answer
Q: What is group 1A the periodic table
5 answers
Q: What is the solubility or solubility product of calcium bromide
2 answers
Q: Why does the electronegativity increase as the atomic number increases
5 answers
Q: Why is the petroleum called fossil fuel
2 answers
Q: What is the balance equation for nitrogen trihydride reacts with oxygen gas to yield nitrogen monoxide and dihydrogen monoxide
1 answer
Q: What kind of bond will hydrogen and phosphorus
1 answer
Q: What word means different and describes how molecules are distributed in a solution
1 answer
Q: Why is coke added to the iron ore in a bast furnace
1 answer
Q: Is ammonium bicarbonate a salt
2 answers
Q: What is the term for the 4 in the formula 4Ca(NO3)2
1 answer
Q: What is the balance equation of potassium bromide aluminum nitrate yields potassium nitrate plus aluminum bromide
1 answer
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