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labwork [276]
2 years ago
8

ANSWER ASAP PLZ???????????????????????????????????

Chemistry
2 answers:
Furkat [3]2 years ago
7 0

Answer:

The answer should be A

Explanation:

sattari [20]2 years ago
7 0

Answer:

Leaving a Copper penny in vinegar until it turns green

Explanation:

the others are physical changes. when copper penny is put in vinegar, a reactive oixde layer is formed which is green in colour. namely, Cu(II) acetate.

The green growing on the penny of copper and the rust forming on the nail of iron are chemical changes. Boiling away salt water, scraping iron filings from a mixture of sand with a magnet, and breaking a rock with a hammer, are physical changes.

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The boiling point of water is a _____ property and is equal to _____.
Reptile [31]

Answer:

The boiling point of water is a physical property and is equal to 0 C.

The Correct Answer is : C

3 0
3 years ago
Read 2 more answers
Are all mutation effects the same? Provide examples?
GREYUIT [131]

Answer: Effects of Mutations

A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations with small effects. Mutational effects can be beneficial, harmful, or neutral, depending on their context or location. Most non-neutral mutations are deleterious.

Other common mutation examples in humans are Angelman syndrome, Canavan disease, color blindness, cystic fibrosis, Down syndrome, Duchenne muscular dystrophy, haemochromatosis, haemophilia, Klinefelter syndrome, phenylketonuria, Prader–Willi syndrome, Tay–Sachs disease, and Turner syndrome

PLZZ GIVE ME BRAINLIEST

8 0
2 years ago
Read 2 more answers
What identifies a flaw in J. J. Thomson’s model of the atom?
katrin [286]

Answer:

The plum-pudding model did not identify a central nucleus as the source of a positive charge.

Explanation:

Sir Joseph John Thomson, most popularly known as J J Thomson. He was a famous scientist who was awarded the Noble prize for Physics for his discovery of the subatomic particle, electron.

He placed his famous model of an atom which is known as plum pudding model. He proposed that the atoms are described as the negative particles that is floating within a soup of the diffuse positive charge.

But the main defect of his proposal was that it did not recognized the presence of a central nucleus as a positive charged source.

3 0
2 years ago
Why does an ionic compound conduct an electric current when the compound is melted but not when it is in the solid state?
skelet666 [1.2K]
When in solid state the charged particles (ions) are NOT free to move but when in melted the ions are free to move.

6 0
2 years ago
Citric acid which is present in citrus fruits is a triprotic acid calculate the ph and the citrate ion concentration for
sammy [17]
Answer:
pH = 1.3

Explanation:
pH is used to measure the concentration of hydrogen ions in a solution. It can be calculated as follows:
pH = -log [H+]

Since the given solution is an acid, therefore, the concentration of H+ ions is the same as the molarity/concentration of the solution.
[H+] = 0.05 m

Substitute in the above equation to get the pH as follows:
pH = -log [H+] = -log [0.05] = 1.3

Hope this helps :)
3 0
3 years ago
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