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mel-nik [20]
3 years ago
13

2 Students were asked to identify the location of elements in the periodic table based on clues

Chemistry
1 answer:
rjkz [21]3 years ago
3 0

Answer:

B

Explanation:

I took the test

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Does sanitizer conduct electricity
lianna [129]

Answer:

Yes, since it has alcohol, it conducts electricity.

3 0
3 years ago
Diuris are common orchids found in Australia. The flowers of this species display a large number of variations in color and mark
Strike441 [17]

From what we know, we can confirm that the variations in colors are a mechanism intended to protect the plants from predators.

<h3>Why is color a protection mechanism?</h3>

This can be observed throughout nature. Many poisonous organisms have evolved bright colors intended to be noticed. Over time, this has resulted in many predators avoiding prey with bright colors, in order to avoid the possibility of being poisoned.

Therefore, we can confirm that the variations in colors are likely a mechanism intended to protect the plants from predators.

To learn more about plants visit:

brainly.com/question/13667276?referrer=searchResults

3 0
2 years ago
State three acids, bases, and Salts commonly used in therapeutic processes​
Delvig [45]
Acetic acid, phosphoric acid, hydrochloric acid.

sodium bicarbonate, magnesium hydroxide, aluminum hydroxide

calcium carbonate, sodium bicarbonate, magnesium sulfate.
3 0
3 years ago
In which of these reactions is energy released​
Darya [45]

Answer:

What are the answers ?

Explanation:

6 0
3 years ago
A solution contains 0.25 M Ni(NO3)2 and 0.25 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3? Assume that fo
amid [387]

Explanation:

Ksp of NiCO3 = 1.4 x 10^-7

Ksp of CuCO3 = 2.5 x 10^-10

Ionic equations:

NiCO3 --> Ni2+ + CO3^2-

CuCO3 --> Cu2+ + CO3^2-

[Cu2+][CO3^2-]/[Ni2+][CO3^2-]

= (2.5* 10^-10)/(1.4* 10^-7)

= 0.00179.

[Cu2+]/[Ni2+]

= 0.00179

= 0.00179*[Ni2+]

If all of Cu2+ is precipitated before Na2CO3 is added.

= 0.00179 * (0.25)

The amount of Cu2+ not precipitated = 0.000448 M

The percent of Cu2+ precipitated before the NiCO3 precipitates = concentration of Cu2+ unprecipitated/initial concentration of Cu2+ * 100

= 0.000448/0.25 * 100

= 0.18%

Therefore, percentage precipitated = 100 - 0.18

= 99.8%

The two metal ions can be separated by slowly adding Na2CO3. Thus that is the unpptd Cu2+.

8 0
3 years ago
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