When 250 G of Ba(s)is Added to 100 $g ^ { - 1 }$

question 76

Multiple Choice

When 2.50 g of Ba(s) is added to 100.00 g of water in a container open to the atmosphere,the reaction shown below occurs and the temperature of the resulting solution rises from 22.00 °C to 40.32 °C.If the specific heat of the solution is 4.18 J $g ^ { - 1 }$ ${ } ^ { \circ } \mathrm { C } ^ { - 1 }$ ,calculate $\Delta H$ for the reaction,as written. Ba(s) + 2H₂O(l) ? Ba(OH) ₂(aq) + H₂(g) $\Delta _ { \mathrm { r } } H$ = ?

• A)-431 kJ \(\mathrm { mol } ^ { - 1 }\)
• B)-3.14 kJ \(\mathrm { mol } ^ { - 1 }\)
• C)+3.14 kJ \(\mathrm { mol } ^ { - 1 }\)
• D)+431 kJ \(\mathrm { mol } ^ { - 1 }\)

Identify and describe the properties that can be set for various data types (Short Text, Number, Currency, etc.).

Recognize the implications of changing field properties on data integrity and user input requirements.

Understand how to utilize default values and input masks to streamline data entry and maintain consistency.

Explain the role and configuration of required fields to ensure data completeness.

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