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mezya [45]
2 years ago
13

Which is true about metals used for jewelry, such as platinum and gold? A. They have low flammability. B. They have low reactivi

ty. C. They have high flammability. D. They have high reactivity.
Chemistry
2 answers:
Morgarella [4.7K]2 years ago
8 0

i think the answer is B. They have low reactivity.Hope this helped (:

Bingel [31]2 years ago
3 0

Answer:

B. They have low reactivity

Explanation:

Platinum and gold are noble metals used to make jewelry.

As noble metals have little reactivity, they have a greater resistance to undergo oxidation (loss of electrons) and reduction (gain of electrons), even with extreme temperature changes. It is very common to see steel wool oxidize (corrode, change color) in the kitchen, but we hardly see this happening with a gold ring or a platinum watch, for example.

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How does changing the temperature affect the chemical reaction?
tiny-mole [99]
The correct answer is C) Raising the temperature increases reaction rate by increasing the energy of the reacting atoms/ions/molecules and increases the number of collisions. 
8 0
3 years ago
After being thoroughly stirred at 10.°C, which mixture is heterogenous?(1) 25.0 g of KCl and 100. g of H2O
zheka24 [161]
The answer is (2) KNO3. This depends on the solubility of these four compounds at 10℃. For NaCl, it is 35.8 g, For NaNO3, 80.8 g. KCl, 31.2 g. KNO3, 21.9g. So only KNO3 is less than 25.0 g.
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2 years ago
What occurs at one of the electrodes in both an electrolytic cell and a voltaic cell?
rjkz [21]
Anode- oxidization

Cathode-reduction
3 0
2 years ago
What is the average atomic mass of chlorine if the mass of one isotope is 34.97 amu and has a p?er cent abundance of 75.77%. The
pishuonlain [190]

Answer : The average atomic mass of chlorine is, 32.37 amu

Explanation :

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i

As we are given that,

Mass of isotope 1 = 34.97 amu

Percentage abundance of isotope 1 = 75.77 %

Fractional abundance of isotope 1 = 0.7577

Mass of isotope 2 = 36.97 amu

Percentage abundance of isotope 2 = 24.23 %

Fractional abundance of isotope 2 = 0.2423

Now put all the given values in above formula, we get:

\text{Average atomic mass of element}=\sum[(34.97\times 0.7577)+(24.23\times 0.2423)]

\text{Average atomic mass of element}=32.37amu

Therefore, the average atomic mass of chlorine is, 32.37 amu

8 0
3 years ago
The oxidation number of all the element in free state is 0​
Art [367]

Answer:

Zero-Nine

Explanation:

this is becasue these numbers are rather small and if you plug these numbers into an equation you will most likely get 0.

8 0
2 years ago
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