Group VII elements are
Group VII elements are A. monoatmic B. good oxidizing agents C. highly electropositive D. electron donors Correct Answer:…
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l . Evaporation. ll. Sublimation. lll. Diffusion. IV. Brownian motion. Which of the above can…
l . Evaporation. ll. Sublimation. lll. Diffusion. IV. Brownian motion. Which of the above can correctly be listed…
If the elements X and Y have atomic numbers 11 and 17 respectively, what type…
If the elements X and Y have atomic numbers 11 and 17 respectively, what type of bond can…
A hydrogen atom which has lost an electron contains
A hydrogen atom which has lost an electron contains A. one proton only B. one neutron only C.…
An increase in the pressure exerted on gas at a constant temperature results in
An increase in the pressure exerted on gas at a constant temperature results in A. a decrease in…
2H2(g) + O2(g) → 2H2 O(g) In the reaction above, what volume of hydrogen would…
2H2(g) + O2(g) → 2H2 O(g) In the reaction above, what volume of hydrogen would be left over…
How many atoms are present in 6.0g of magnesium? [Mg = 24, NA = 6.02…
How many atoms are present in 6.0g of magnesium? [Mg = 24, NA = 6.02 x 1023 mol-1]…
50 cm3 of gas was collected over water at 10oC and 765 mm Hg. Calculate…
50 cm3 of gas was collected over water at 10oC and 765 mm Hg. Calculate the volume of…
An organic compound contains 60% carbon, 13.3% hydrogen and 26.7% oxygen. Calculate the empirical formularn(C=12,H…
An organic compound contains 60% carbon, 13.3% hydrogen and 26.7% oxygen. Calculate the empirical formularn(C=12,H =1, O=16) A.…
Which of the following methods can be used to obtain pure water from a mixture…
Which of the following methods can be used to obtain pure water from a mixture of sand, water…