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Questions on Chemistry (Total: 64)
How many grams of glucose are there in 1 litre of glucose 50%
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Bromine is less reactive than fluorine because it is __________ for fluorine to gain an electron. What word completes the sentence?
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The amount of energy transferred per unit time by an electrical appliance is measured in what? Give thename not the symbol.
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Buckminster Fullerene is a good Lubricant. Suggest why Buckminster Fullerene is a
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How many miles are equal to 1.7 km (1 inch = 2.54 cm)
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True or false acid strength and acid concentration both mean the same thing
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Suggest the name and formula of the compound formed between magnesium and astatine.
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What is the electron configuration of V3+? [Ar]4s23d3 [Ar]4s23d0 [Ar]4s03d2 [Ar]4s23d5 What are possible correct quantum numbers for two outer most valence electrons in V3+? 3,3,-2, +1/2 AND 3,3,-1, + 1/2 3,2,-2,+ 1/2 AND 3,2,-1, + 1/2 4,1,0 + 1/2 AND 4,1,0, - 1/2 4,0,0+ 1/2 AND 4,0,0, - 1/2 How many unpaired electrons does V3+ have? Three One None Two Is V3+ paramagnetic or diamagnetic? Why? Diamagnetic because it has paired electrons Paramagnetic because it has unpaired electrons Paramagnetic because it has paired electrons Diamagnetic because it has unpaired electrons
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What concentration of H+ ions does a substance with a pH of 3 have
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Sodium has the atomic number 11. How many electrons are in a sodium ion (Na)?
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What is the relative atomic mass of an atom that contains 12 protons, 14 neutrons and 12 electrons?
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Name the technique used to separate a mixture of substances that are soluble in the same solvent.
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Why would the addition of alkali to this system lead to less CO2 (aq) being present?thank youu
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Most metals are found chemically joined to other elements in substances known as... what?
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What is the missing word in this word equation? acid + alkali → __________ + water
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Describe what happens when a lithium atom reacts with a chlorine atom.Answer in terms of electrons.
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Fluorine + sodium chloride → sodium fluoride + __________. What is the missing chemical name?
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What happens to a metal pipe when heated with 100 c liquid
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What is the relative formula mass of Mg(OH)₂
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Explain why a mixture is used as the electrolyte instead of using only aluminium oxide
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You need to add 1.2 g of amiodarone to 500 ml of glucose 5%. How many mg/ml of amiodarone is this?a. 2.4 mg/ml b. 4 mg/ml c. 6 mg/ml d. 8 mg/ml
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In the electrolysis of aluminum ore, what is the positive ion made of? Give the name, not the symbol. A. Aluminum B. Oxygen C. Hydrogen D. Aluminum oxide
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What discovery proved Mendeleev's periodic table to be correct and Newlands' to bewrong? The discovery of protons and isotopes The discovery of oxygen and nitrogen The discovery of electron shells The discovery of atomic weight 0/1
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What group in the periodic table is not usually involved in ionic bonding? a. Group 1 b. Group 7 c. Group 0 d. Group 2
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In the diagram of the human digestive system, what organ is labelled 2?
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Substance x is a typical metal would you expect its density to be high medium or
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What is stronger than steel but cowers from the sun?
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Look at the diagram. Which shows the correct arrangement of electrons in a chlorine molecule?Enter your answer as a number
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Calculate the relative formula mass of Zn(NO3)2. Round your answer to the nearest whole number?
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What is the empirical formula of the compound: C7H4O2? a.C14H8O4 b.C3H2O2 c.C7H4O2
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Look at the diagram. Which shows the correct arrangement of electrons in a hydrogen chloride molecule?
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The diagram shows an exchangesurface in the human body. Name the parts labelled 2. Enter your answer
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How many neutrons does beryllium-11 contain? Use the diagram below to help you.
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Explain why copper oxide (CuO) has a high melting point.
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How can the exess copper carbonate be removed?
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Look at the diagram. Which shows the correct arrangement of electrons in water?
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What name is given to a reaction that takes in energy from the surroundings?
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What is the Mr of an ammonia molecule (NH3)? Round your answer to the nearest whole number.
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4Tennessine was first identified by a small group of scientists in 2010. 12 Suggest one reason why tennessine was not accepted as a new element by other scientists until 2015.
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Oxidation reactions involve the loss of __________. what one word completes the sentence?
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What can we say if the Rf values of a reference and a spot match in all solvents?
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Complete the table below for calculating the molar mass of the compound carbon dioxide. Molar Mass Moles Mass in One Mole of Compound C g/mol mol g O g/mol mol g Molar Mass carbon dioxide =______ g/mol
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List TWO things that can occur during a reduction reaction.
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10:38 Fri 9 JulES GCSE Science - Chemistry 2 of 15 Name the indicator that is red in acid and turns green when the solution becomes neutral. |
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Can spores survive high temperatures drying and disinfection
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True or false plant cells tend to retain the ability to differentiate for longar than animal cells
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Name a metal that can be extracted from its ore using carbon. answer in words not symbols.
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What ONE word is used to describe a solid that dissolves in a liquid?
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Perspex and polythene are two examples of what?
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Name the substance that limewater is used to test for. give the full name, not the formula.
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