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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: The molecular formula for hydrogen sulfide is H2S. What does the formula indicate about the composition of a 1.0 gram sample of hydrogen sulfide
2 answers
Q: A substance that does not form hydroxide ions in a water soultion is a base
1 answer
Q: What type of bond is CH
1 answer
Q: Define the term oxygen saturation.
1 answer
Q: Polymers would include any 5 of the following acrylic polyethylene silicone Bakelite fiberglass polyvinyl chloride (PVC or vinyl) and nylon.
2 answers
Q: A substance that forms hydroxide ions in a water solution is a base
2 answers
Q: Is BrO3 Covalent or Ionic
2 answers
Q: Na-23 has 12 neutrons what is the atomic number
3 answers
Q: The amount of energy in the bonds of the reactants plus any energy absorbed equals the amount of energy in the bonds of the products plus any energy .
2 answers
Q: This item is a common source of heat in a laboratory.
7 answers
Q: The strength of an acid and a base is determined by how completely they blank in water
1 answer
Q: What is the number of electrons in boron
1 answer
Q: In the reaction between bromine and sodium a bromine atom gains an electron and forms the bromide ion Br and ndash. What happens to bromine
1 answer
Q: A nuclear Chain reaction occurs when
2 answers
Q: Is an energy drink a homogeneous mixture or a heterogeneous mixture
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Q: What is the freezing and melting point of boron
1 answer
Q: Which SLoc is used for property being added or removed from a UIC
2 answers
Q: Name the green coloured chemicals in leaves
1 answer
Q: How hot is 400 degrees Celsius
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Q: Lead is how much heavier than iron
1 answer
Q: Is cocoa powder ionic or covalent bond
1 answer
Q: In 1661 who developed a definition of element that made the concept subject to laboratory investigation
1 answer
Q: A water molecule contains two hydrogen elements and one oxygen atom what is wrong with this question
3 answers
Q: Mass of oxygen in one breath changes as you climb from sea level
1 answer
Q: Why does baking soda turn apples brown
1 answer
Q: What chemical change occurred in the following reaction Mg2 plus (aq) plus 2OH and minus(aq) and 10230 Mg(OH)2(s)
2 answers
Q: To write the formula for an ionic compound write the formulas for the cation and the anion then use subscripts to what charges
1 answer
Q: The presence of ketones changed the pH in the urine of the patient. The pH of the urine was
1 answer
Q: Ketones release hydrogen ions when dissolved in water so they can be described as what
3 answers
Q: How many grams of NaOH do you need to make 1 liter of a 10 percent sodium hudroxide solution
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Q: What happens when acid rain touches iron
1 answer
Q: Is coal a element compound or mixture
1 answer
Q: What is the most common element in the boron group
2 answers
Q: Does hexane conduct electricity when it is a solid
1 answer
Q: What is so special about hydrogen
1 answer
Q: Magnesuim plus nitric acid
2 answers
Q: What are the ions present in the compound CO2
2 answers
Q: Why are the coloured plastic or glass are called colour filters
1 answer
Q: What is a compound word for drop
1 answer
Q: Can you use lysol in laundry
1 answer
Q: Is body fat sugar
2 answers
Q: What does cws mean on a gold ring
1 answer
Q: What the name of Al(NO3)3
2 answers
Q: Is tungsten sonorus
1 answer
Q: Magnesium with oxygen what symbol of element
1 answer
Q: What is the word equation for the reaction between strontium and oxygen
1 answer
Q: Copper plus oxygen is what
2 answers
Q: Sodium reacts with oxygen to make sodium oxide what are the two reactants
1 answer
Q: The cemical reaction in which an element ssuch as iorn combines with oxygen to form an oxide is called
2 answers
Q: List the types and numbers of the atoms in one molecule of H2O
2 answers
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