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What is the correct formula for phosphorus pentachloride?
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Chemistry
- A sample of calcium nitrate crystal hydrate with its mass of 1.1808 g was heated at 150oC resulting in its mass being reduced to a constant value of 0.8204 g of anhydrous salt. What is the mole ratio of water to anhydrous salt in this salt hydrate. (A) 2 (B) 4 (C) 6 (D) 7 (E) None of those, if so, what is your answer?arrow_forwardWrite the name of each of the following substances: (W (a) (HCOO)2Ni-½H2O (b) Zn(SCN)2 (c) Ag2CrO4 (d) HIO2(aq)arrow_forwardIs the decomposition of CuSO4· 5 H2O a physical or a chemical change? Why?arrow_forward
- 1) A sample of blue crystals of copper (II) sulfate pentahydrate was heated to produce the copper(Il)sulfate tetrahydrate. (a) Write the chemical formulas of the copper(II)sulfate pentahydrate and copper(II)sulfate tetrahydrate. (b) Calculate mass percent of water in copper(II)sulfate pentahydrate (c) If 7.491 g of the copper (II) sulfate pentahydrate produces 6.951 g of the copper (II) sulfate tetrahydrate, how many grams of anhydrous copper(I1)sulfate could be obtained? (Cu=63.5 g/mol, S=32.0 g/mol, O=16.0 g/mol, H=1 g/mol)arrow_forwardGive the Stock system name for the following. (a) Fe(NO3)3(b) Au2S(c) CuIarrow_forward4) 2 2 NaHCO3 (s) ----> 2 C(s) + 3 Na(s) + 02(g) 1 H2(g) +arrow_forward
- 2. a) b)arrow_forward(a) List four physical characteristics of a solid metal. (b) List two chemical characteristics of a metallic element.arrow_forwardWhen 25 g of lead (II) nitrate, Pb(NO3)2, is mixed with 15 g of sodium iodide in water, a reaction occurs and this produces sodium nitrate and solid lead (II) iodide. (a) Write a balanced equation for the reaction. (b) Calculate the theoretical amount of lead (II) iodide produced.arrow_forward
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