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Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.
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What substance has a mass of 9.5g and volume of 2.1cm^3
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How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123
Answers: 1
A là đơn chất, phân tử gồm 2 nguyên tử x. Tổng số hạt trong 1 phân tử A là 42
a)xác định Abieets hợ...
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