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Chemistry, 23.06.2019 18:00
If cos x =sin(20 + x) and 0 < x < 90, the value of x is > 3 , 35 , 350answer is 35, free 50 points
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Chemistry, 23.06.2019 19:30
As rock is worn away by waves on a coastline, the land that takes a little longer to wear away can from a
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Chemistry, 23.06.2019 20:30
Iron(iii) ions, fe3+ , react with thiocyanate ions, scn- , in a reversible reaction to form a red solution. which changes to the equilibrium will make the solution go red? i. increasing the temperature ii. adding fecl3 iii. adding a catalyst a. i and ii only b. i and iii only c. ii and iii only d. i, ii and iii
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How is energy involved in chemical and physical changes?...
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