__ Cr + __ O2 → __ Cr2O3
__ Al + __ HCl → __ AlCl3 + __ H2
__ Ca(NO3)2 + __ Fe → __ Fe(...
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There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.
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When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two
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Why dose heating increase the speed at which a solution dissolved in water
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