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nordsb [41]
3 years ago
11

4. Which of the following is NOT a common property of bases? A. Feels slippery B. tastes bitter C. Reacts with metal D. Changes

colors of indicators
Chemistry
2 answers:
miv72 [106K]3 years ago
4 0

Answer:

C. Reacts with metal

Explanation:

A base is a substance that releases hydroxide ions +OH in water

the following option are true of base:

B. it have a bitter taste e.g milk of magnesia is a base, mustard and soap

A. base have a slippery or soapy feel

D. base changes colour of indicator; red litmus paper is used to test for base. its changes red litmus paper blues in the presence of hydroxide ion.

Option C is not a common properties of base

base are formed when the oxide of some metals dissolve in water.

base react with acid to form salts and water.

alisha [4.7K]3 years ago
3 0

Reacting with metals is not a common property of bases. Bases do however react with acids. 

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Calculate the standard reaction enthalpy for the reaction NO2(g) → NO(g) + O(g) given +142.7 kJ/mol for the standard enthalpy of
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Answer:

The standard reaction enthalpy for the given reaction is 235.15 kJ/mol.

Explanation:

O_2(g) \rightarrow \frac{2}{3}O_3(g),\Delta H^o_{1}=142.7 kJ/mol..[1]

O_2(g) \rightarrow 2 O(g),\Delta H^o_{2}=498.4 kJ/mol..[2]

NO(g) + O_3(g)\rightarrow NO_2(g) + O_2(g) ,\Delta H^o_{3} = -200 kJ/mol..[3]

NO_2(g)\rightarrow NO(g) + O(g),\Delta H^o_{4}=?..[4]

Using Hess's law:

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

2 × [4] = [2]- (3 ) × [1] - (2) × [3]

2\times \Delta H^o_{4}=\Delta H^o_{2} -3\times \Delta H^o_{1}-2\times \Delta H^o_{3}

2\times \Delta H^o_{4}=498.4 kJ/mol-3\times 142.7 kJ/mol-2\times -200 kJ/mol

2\times \Delta H^o_{4}=470.3 kJ/mol

\Delta H^o_{4}=\frac{470.3 kJ/mol}{2}=235.15 kJ/mol

The standard reaction enthalpy for the given reaction is 235.15 kJ/mol.

7 0
3 years ago
What is the symbol beryllium is most likely to form ? and what kind of ion is it ?
zheka24 [161]

Answer:

Explanation:

The symbol of beryllium is Be. It is located in the second group on the periodic table.

Beryllium is a divalent cation with a charge of +2.

It is capable of losing 2 electrons in order to be like the noble gas He and this is a more stable configuration.

7 0
3 years ago
Read 2 more answers
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