ACS Chemistry

What solution volume is needed to prepare a 0.110 M solution of MgSO4 using 10.3 g of the compound?

The molar mass of MgSO4 is 120.366 g/mol (A) 9.41x10-3 L (B) 0.778 L (C) 1.11 L (D) 93.6 L Solution: Molarity = moles of solute/ Liters...

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What is the strongest electrolyte in dilute aqueous solution?(A) HCI04 (B) HCN (C) HF (D) H

(A) HCIO4 (B) HCN (C) HF (D) HNO2 Solution: Strong electrolytes are substance that can conduct electricity by producing charged particles...

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What is the oxidation number of Mo in MoO4^2-?

(A) +2 (B) +4 (C) +6 (D) +8 Solution: Let's first go over some rules for determining the oxidation number. Rules for determining...

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Which reaction will result in a precipitate?

(A) FeCl2(aq) + Na2S(aq)---> (B) H2SO4(aq) + NaOH(aq)---> (C) KCl(aq) + CaBr2(aq)---> (D) Zn(NO3)2(aq) + Hl(aq)---> Solution: These are...

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As water is being added to a concentrated NaOH solution

As water is being added to a concentrated NaOH solution (A) the moles of solute are decreasing, and the molarity is increasing. (B) the...

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What mass (in g) of sodium ions, Na+, are there in 25 mL of 0.75 M Na2SO3?

(A) 0.019g (B) 0.87g (C) 2.4 g (D) 4.8g Solution: Molarity= moles of solute/L of solution Molarity = 0.75M Volume = 25ml (1L/1000ml) =...

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What mass (in g) of magnesium nitrate, Mg(NO3)2, are required to produce 250.0 mL of a 0.0750 M solution?

(A) 0.0188 g (B) 0.0445 g (C) 1.61 g (D) 2.79 g Solution: Molarity = moles of solute/liters of solution M = 0.0750M V= 250.0ml(...

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A solution of NaCl in water has a concentration of 20.5% by mass. What is the molal concentration of the solution?

The formula for molality is molality =moles of solute/kg of solvent We need to assume something since we are only given %. We can assume...

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