Chemistry, 04.08.2019 22:00 raytaygirl
Amineral sample scratches fingernails, pennies, and glass but does not scratch steel as shown below. what is the hardness of the mineral?
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Chemistry, 22.06.2019 09:10
Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons
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Chemistry, 22.06.2019 17:00
Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.
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Chemistry, 23.06.2019 07:40
Did the detergents containing enzymes work better at removing stains than those containing no enzyme? why or why not?
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Amineral sample scratches fingernails, pennies, and glass but does not scratch steel as shown below....
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