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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: Metallic bonds are
2 answers
Q: Cd solid reacts with 2HBr aq to produce
2 answers
Q: Total number of atoms in one molecule in table sugar
1 answer
Q: What does zncl stand for
1 answer
Q: Three other gaseous elements that probably will not burn either
9 answers
Q: The number of elements in hydrogen peroxide
1 answer
Q: Total number of atoms in one molcule in epsom salts
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Q: Which group of metals is charterised by a single valence electron and very active atoms
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Q: Epinephrine (adrenaline) is 59.0 carbon 7.1 hydrogen 26.2 oxygen and 7.7 nitrogen by mass. What is the empirical formula of epinephrine if its molar mass is 180 gmol
2 answers
Q: Styrene has the empirical formula CH. It has a molar mass of 104 g. What is the multiplier to get the molecular formula
2 answers
Q: What does water contains
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Q: Gold has a shiny metallic
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Q: What is the common name for CaCl2
2 answers
Q: The chemical combination of two or more different atoms in fixed amounts is called
4 answers
Q: You are using a pipette that has a mark every 0.1 mL. If you want to measure 5.15 mL of liquid using this pipette to what level should you fill the pipette
2 answers
Q: If an atom such as hydrogen is able to form covalent bond describe what happens when the electrons shells of two atoms overlap
1 answer
Q: A family of elements that has two electrons in its outer energy level is
2 answers
Q: What is the oxidation number of carbon in methanol
1 answer
Q: Of the following elements which one would have the largest ionization energy Hydrogen (H atomic 1) Cesium (Cs atomic 55) Sodium (Na atomic 11) Potassium (K atomic 19)
2 answers
Q: Describe energy in an exothermic reaction
8 answers
Q: A three-demensional medium that has components of clay glass plastic bronze metal wood stone or wire is called what
1 answer
Q: A substance has a pH of 7. Which of the following descriptions matches this pH
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Q: If you burn a piece of wood it becomes a different substance. What type of property is this
2 answers
Q: In what sizes of particle the aggregate are deficient or oversupplied
1 answer
Q: A patient is suffering from painful highly corrosive burns similar to acid and wheals have begun to appear on the skin. which vesicant agent is suspected
4 answers
Q: What chemical compound once used as a propellant in aerosol sprays
4 answers
Q: What element represents a compound
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Q: Compounds are made up of more than one element. Which of the following represents a compound NH3 O3 N2 H2
2 answers
Q: Explain active methylene compound with examples
1 answer
Q: How do you prepare 4N potassium chloride
1 answer
Q: What do you observe when ammonium hydroxide is added o iron (iii) choloride
1 answer
Q: How do you make 1percent acetic acid in acetonitrile
1 answer
Q: Polonium charge number
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Q: What is compound dissociation
2 answers
Q: You need to heat a solid to a temperature of 250 and deg Celsius. What would be the most appropriate type of glassware to use
1 answer
Q: Materials that are needed for an experiment could be held in this item until time to use them.
3 answers
Q: What a soultion that is neither acidic nor basic called
1 answer
Q: At 212 degrees Fahrenheit what does water do
3 answers
Q: Is iron triad a nonmetal
2 answers
Q: What color does Light gray and yellow mixed make
1 answer
Q: What types of energy are in coal
1 answer
Q: In which group are the elements gases at room temperature
6 answers
Q: In which group are the elements always linked with others to form compounds
1 answer
Q: Elements in the same group or family share important
2 answers
Q: What is the concentration of an HBr solution if 12.0 mL of the solution is neutralized by 15.0 mL of a 0.25 M KOH solution
1 answer
Q: Name the two main numbering system used to measure the purity of gold
1 answer
Q: Is sterling silver a heterogeneous mixture
2 answers
Q: A chemical change in which a substance combines with oxygen as when iron oxidiesforming rust.
2 answers
Q: Is purple color a physical and chemical change
3 answers
Q: Elements after iron are made how
2 answers
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