chemical-aritmatic

Related Questions

• If ${N_A}$is Avogadro’s number then number of valence electrons in 4.2 g of nitride ions $({N^{3 - }})$

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• Given the numbers: 161cm, 0.161cm, 0.0161 cm. The number of significant figures for the three numbers are

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• Two elements X and Y have atomic weights of 14 and 16. They form a series of compounds A, B, C, D and E in which the same amount of element X, Y is present in the ratio 1 : 2 : 3 : 4 : 5. If the compound A has 28 parts by weight of X and 16 parts by weight of Y, then the compound of C will have 28 parts weight of X and

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• The weight of $1 \times {10^{22}}$molecules of $CuS{O_4}.5{H_2}O$is

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• Chemical equation is balanced according to the law of

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