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4 years ago

Please help! I’m stuck on this. (Giving brainliest answer to whoever answers everything) please and thank you!

Chemistry

1 answer:

Schach [20]4 years ago

3 0

Answer:

Explanation:

1 : apple sliced : the apple was cut into smaller peices : physical change

2 : smashed apple : the apple became a mush : physical change

3 : paper burned : the paper became ash : chemical change

4 : glow stick snapped : the glow stick started glowing : chemical change

5 : apple being burned : the apple became discoloured and turned coal-like : chemical change

_____

2. it does not alter the chemical make up of the apple

3. because it changes to a new substance entirely, changing the chemical make up of the paper to make it something new

4. smashing the apple, because you mash up the apple with your teeth in your mouth

5. The apple being burned is being chemically broken down to form a new substance, the same way your stomach digests food to break down and use for other reasons.

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3 years ago

A weak acid, ha, has a p��a of 4. 524. If a solution of this acid has a ph of 4. 799 , what percentage of the acid is not io

insens350 [35]

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Explanation:

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2 years ago

GarryVolchara [31]

Answer:

The value of the Golden Igloo is $227.4 million.

Explanation:

First, we need to find the inner and the outer volume of the half-spherical shell:

$V_{i} = \frac{1}{2}*\frac{4}{3}\pi r_{i}^{3}$

$V_{o} = \frac{1}{2}*\frac{4}{3}\pi r_{o}^{3}$

The total volume is given by:

$V_{T} = V_{o} - V_{i}$

Where:

$V_{i}$ : is the inner volume

$r_{i}$ : is the inner radius = 1.25/2 = 0.625 m

$V_{o}$ : is the outer volume

$r_{o}$ : is the outer radius = 1.45/2 = 0.725 m

Then, the total volume of the Igloo is:

$V_{T} = \frac{2}{3}\pi r_{o}^{3} - \frac{2}{3}\pi r_{i}^{3} = \frac{2}{3}\pi [(0.725 m)^{3} - (0.625 m)^{3}] = 0.29 m^{3}$

Now, by using the density we can find the mass of the Igloo:

$m = 19.3 \frac{g}{cm^{3}}*0.29 m^{3}*\frac{(100 cm)^{3}}{1 m^{3}} = 5.60 \cdot 10^{6} g$

Finally, the value (V) of the antiquity is:

$V = \frac{\$ 1263}{oz}*5.60 \cdot 10^{6} g*\frac{1 oz}{31.1034768 g} = \$ 227.4 \cdot 10^{6}$

Therefore, the value of the Golden Igloo is $227.4 million.

I hope it helps you!

8 0

3 years ago

What is the total anion concentration (in mEq/L ) of a solution that contains 6.0 mEq/L Na + , 11.0 mEq/L Ca 2+ , and 1.0 mEq/L

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3 years ago

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Answer:

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Explanation:

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3 years ago