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Chemistry, 27.06.2019 16:00 trmcswain03
: how much energy is required to heat an iron nail with a mass of 25.5 grams from 65°c until it becomes red hot at 720°c? (c for iron = 0.4494 j/g°c). part a: enter the variable symbol for the quantity you need to find. use your keyboard and the keypad to enter your answer. then click done.
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Chemistry, 23.06.2019 16:30, brazilmade1
Match the words in the left column to the appropriate blanks in the sentences on the right. (a) this is the law of definite proportions: all samples of a given compound, regardless of their source or how they were prepared, have proportions of their constituent elements. (b) this is the law of conservation of mass: in a reaction, matter is neither created nor destroyed. (c) this is the law of multiple (c) this is the law of multiple blank: when two elements form two different compounds, the masses of element b that combine with 1 g of element a can be expressed as a ratio of small whole-numbers. in this example, the ratio of \rm o from hydrogen peroxide to \rm o from water = 16: 8 \to 2: 1, a small whole-number ratio.: when two elements form two different compounds, the masses of element b that combine with 1 g of element a can be expressed as a ratio of small whole-numbers. in this example, the ratio of o from hydrogen peroxide to o from water = 16: 8 → 2: 1, a small whole-number ratio.
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