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Is the ratio of copper to zinc in the pennies made after 1982 higher or lower than the ratio of copper to zinc in the pennies made before 1982?
Wiki User
∙ 11y ago
The pre-1982 pennies are 95% copper and 5% zinc. Post-1982 cents are 97.5% zinc and 2.5% copper.
Wiki User
∙ 11y ago
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How do you lower copper levels in the body?
Lower copper level by using Zinc and Vitamin C
Air moves from where pressure is higher to lower or lower to higher?
Higher to lower.
Is it impossible for an element to replace atoms of anothe element in a compound?
No. In a displacement reaction, that is exactly what happens. If an element low down in the reactivity series is in a compound, and you add an element that is higher placed in the reactivity series. The more reactive element will displace the less reactive element in the compound.Example:Copper Sulphate - Copper is low in the reactivity series and is in a compoundSodium + Copper Sulphate - Sodium is higher in the reactivity series than copper, and is in it's pure elemental form.Copper + Sodium Sulphate - The Sodium that is higher in the reactivity series has switched places with the Copper, which is lower in the reactivity series.FULL EQUATION:Sodium + Copper Sulphate --> Copper + Sodium Sulphate
Why does water boils at lower temperatures than in a valley?
Water boils at lower temperatures at higher altitudes because the atmospheric pressure is lower. In a valley, the air pressure is greater, which allows water to reach a higher temperature before boiling. At higher altitudes, where the air pressure is lower, the boiling point of water decreases.
What is the higher the hydronium ion concentration of a solution called higher or lower of pH?
lower
Does aluminum have lower resistance than copper?
No, aluminum has a higher resistance than copper.
Why did they stop making pennies out of copper?
The US made pennies of copper (95%) in 1941 and 1942, and partially from old shell casings in 1944 and 1945 (so the copper content may have been slightly lower in those years). Only in 1943 were pennies made of steel (with a zinc coating) in an effort to save copper for use in the war effort. Probably because they needed copper for the world war 2 effort. ww2 the need for wiring in the military Short answer: The US was using all the coper for munitions used for WWII. copper was required for the war effort i.e. to make electrical cables
Why does more current flow through the bulb when the reed switch was replaced with copper wire?
Copper wire has apparently lower resistance than the reed switch. The lower electric resistance, the higher electric current.
Why is it that with aluminum copper and iron the modulus of elasticity is higher for crystallographic directions with higher linear density?
I meant lower linear density, but I can't change it. So for example for Aluminum the Linear density of [111] is lower than for [110] and that is again lower than [100]. But you notice that the modulus of elasticity is higher for [111] than for [110] and that again is higher than for [100]
How do you lower copper levels in the body?
Lower copper level by using Zinc and Vitamin C
Would the pH of the solution be lower before or after the enzymatic reaction?
It would be higher
Air moves from where pressure is higher to lower or lower to higher?
Higher to lower.
Do copper and bleach react with each other?
Yes sodium hypochlorite does react with copper. I did the test where copper was immersed in bleach and the parts near the surface where turning verdigris while the lower ones where getting coroded in a higher rate.
Does copper sink in water?
Copper does not sink in water.. An object with higher density than water sinks while an object with lower density than water floats..
What is a hypothesis for how pH in water Affects Copper Corrosion?
If the water's pH is more acidic (lower pH) then the effects of copper corrosion will be faster and more pronounce. If the water is less acidic (Higher pH) copper corrosion will take longer and be less pronounce.
Electrons flow from areas of higher to lower voltage or from areas of lower to higher voltage?
Electronsflow from areas of lower to higher voltage, while Current flow from areas higher to lower voltage.
Is it impossible for an element to replace atoms of anothe element in a compound?
No. In a displacement reaction, that is exactly what happens. If an element low down in the reactivity series is in a compound, and you add an element that is higher placed in the reactivity series. The more reactive element will displace the less reactive element in the compound.Example:Copper Sulphate - Copper is low in the reactivity series and is in a compoundSodium + Copper Sulphate - Sodium is higher in the reactivity series than copper, and is in it's pure elemental form.Copper + Sodium Sulphate - The Sodium that is higher in the reactivity series has switched places with the Copper, which is lower in the reactivity series.FULL EQUATION:Sodium + Copper Sulphate --> Copper + Sodium Sulphate
