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4 years ago

Which object absorbs the most visible light?

2 answers:

5 0

ANSWER-
A black t-shirt
The color black absorbs the most light out of all the colors. That’s why people wear white on hot days

svetlana [45]4 years ago

4 0

Answer:a black tshirt

Explanation:the color black absorbs the most light

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When a person pushes off a wall with 15N of force,how much force does the wall push back

aivan3 [116]

Newton's third law of motion states that for every action force, there is an equal and opposite reaction force so that means that the wall is pushing you with the same amount of force that you put on it.

5 0

4 years ago

ANSWER ASAP GIVING BRAINIEST FIVE STARS AND HEART!

Marina86 [1]

Answer:

The energy in matter is invisible

Whether in which form it Is,it can be transmitted from one object to another.

Explanation:

thnx :)

6 0

3 years ago

Read 2 more answers

A student was trying to determine the mole percent of A in a mixture of A and B using refractive index. If their mixture has a r

Elina [12.6K]

Explanation:

Formula to calculate refractive index of n is as follows.

n = $X_{A} \times n_{A} + X_{B} \times n_{B}$

where, $X_{A}$ = mole fraction of A

$X_{B}$ = mole fraction of B

$n_{A}$ = refractive index of A

$n_{B}$ = refractive index of B

Hence, putting the given values into the above formula as follows.

n = $X_{A} \times n_{A} + X_{B} \times n_{B}$

1.5248 = $X_{A} \times 1.7058 + X_{B} \times 1.3658$ ........ (1)

Also, it is known that $X_{A} + X_{B}$ = 1

and, $X_{B} = 1 - X_{A}$ ......... (2)

Now, put equation (2) in equation (1) as follows.

1.5248 = $X_{A} \times 1.7058 + 1 - X_{A} \times 1.3658$

1.5248 = $X_{A} \times 1.7058 + 1.3658 - 1.3658X_{A}$

$X_{A}$ = 0.467

And, the value of $X_{B}$ is calculated as follows.

$X_{B} = 1 - X_{A}$

= $1 - 0.467$

= 0.533

Hence, mole percentage of A will be calculated as follows.

Mole % of A = $\frac{n_{A}}{n_{A} + n_{B}}$

= $\frac{0.467}{0.467 + 0.533} \times 100$

= 46.7%

Thus, we can conclude that the mole percent of A in their mixture is 46.7%.

8 0

3 years ago

In an exactly.200M solution of benzoic acid, a monoprotic acid, the [H+] = 3.55 × 10–3M. What is the Ka for benzoic acid? 8.88 ×

kondaur [170]

Answer : Option C) 6.3 X $10^{-5}$ .

Explanation : Given is the concentration of benzoic acid is 0.200 M, now only one monoprotic acid ion is getting separated from it [ $[ H^{+} ]$ .

So, the reaction will be as,

$H C_{7} H_{6}O_{2}$ ⇔ $[ H^{+} ]$ + $C_{7} H_{6}O_{2}$ .

We can use the ICE method for calculation,
The molar concentration of $H C_{7} H_{6}O_{2}$ is 0.200 M and the [ $[ H^{+} ]$ is 3.55 X $10^{-5}$ .

So here on reactant side we get, (0.2 - 3.55 X $10^{-5}$ ) = 0.196
on the product it remains as 3.55 X $10^{-5}$ .

So, $K_{a}$ = (3.55 X $10^{-5}$ ) X (3.55 X $10^{-5}$ ) / 0.196

We will get $K_{a}$ as 6.42 X $10^{-5}$ which is close to 6.3 X $10^{-5}$ .

4 0

3 years ago

Why is fluorine a gas at room temperature? <br> GIVING BRAINLIEST AND LOTS OF POINTS ‼️‼️

pav-90 [236]

Answer:

In fluorine, the electrons are tightly held to the nuclei. The electrons have little chance to wander to one side of the molecule, so the London dispersion forces are relatively weak. At a low enough temperature the molecules will all be solids. At a high enough temperature they will all be gases.

Explanation:

3 0

3 years ago