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Chemistry, 23.06.2019 07:10
1) a light bulb takes in 30 of energy per second. it transfers 3j as use energy. calculate the efficiency. second. it transfers 3j as useful light energy and 27j as heat energy. calculate the efficiency
Answers: 1
Chemistry, 23.06.2019 09:30
Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.
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Chemistry, 23.06.2019 18:20
Sari is studying for different sample of materials. this table shows the mass and volume of the samples. which sample material(s) could be liquid
Answers: 3
Mg(OH)2(aq)+2HCl(aq)>MgCl2(aq)+2 H2O(l)...
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