Experiment 4 Prelab Assignment 1. What basic physical law is applied in this experiment? STREET CUR law of Conservation ?? A student carried out the reaction below starting with 1.993 g of unknown (X?CO3), and found that the mass loss due to CO? was 0.593 g. 1.9939 X2CO3(s) + 2 HCl(aq) 2 XCl(aq) + H?O(1) + CO?(g) - 2. How many moles solutionspile.com

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Experiment 4 Prelab Assignment 1. What basic physical law is applied in this experiment? STREET CUR law of Conservation ?? A student carried out the reaction below starting with 1.993 g of unknown (X?CO3), and found that the mass loss due to CO? was 0.593 g. 1.9939 X2CO3(s) + 2 HCl(aq) 2 XCl(aq) + H?O(1) + CO?(g) ->>>> 2. How many moles of CO? were produced? 3. How many moles of X2CO3 were consumed? 4. What is the molar mass of X2CO3? mass 5. What is the molar mass of the alkali metal X? 6. What is the identity of X (lithium, potassium, or sodium)? Justify your answer.

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1. What basic physical law is applied in this experiment? law of cousurvation of wass A student carried out the reaction below starting with

1.993 g

of unknown

(X_{2} CO_{3})

, and found that the mass loss due to

CO_{2}

was

0.593 g

.

1.943 g X_{2} CO_{3} (s) + 2 HCl (a q) ? 2 XCl (a q) + H_{2} O (l) + CO_{2} (g)

2. How many moles of

CO_{2}

were produced? 3. How many moles of

X_{2} CO_{3}

were consumed? 4. What is the molar mass of

X_{2} CO_{3}

? 5. What is the molar mass of the alkali metal

X

? 6. What is the identity of X (lithium, potassium, or sodium)? Justify your answer.

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