Trộn lẫn 100ml dung dịch Ba(OH)2 1M với 100ml dung dịch Al2(SO4)3 0,2M, khuấy đều cho phản ứng xảy ra hoàn toàn thu được x gam kết tủa và dung dịch A. Sục CO2 dư vào A thu được y gam kết tủa. Giá trị của x và y

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

If oil spills continue, all of the following should be expected except (2 points) death of aquatic life. polluted groundwater. decreased soil productivity. increased global temperatures.

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