Ask question

Ask question

All categories

3 years ago

6

Approximate the instantaneous rate of this reaction at time t = 40 s.

1 answer:

Vadim26 [7]3 years ago

6 0

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
Find the slope at t = 40, points (0, 0.48) and (70, 0.24).
Slope= Δy= (0.24 – 0.48)=– 0.0034 M/s
Δx(70 – 0)
<span>
(the negative represent direction so the answer is positive)</span>

You might be interested in

A sample of water at 100°C is converted to steam after absorbing 820 kJ of heat. How grams of H2O are contained in the sample? A

Varvara68 [4.7K]

Since water is already at 100<span>°C all the energy is used to evaporate it.
Now we can calculate how many </span>mols of water are evaporated with 820kJ.
$N= \frac{820}{41} =20 mol$
We calculated that we got 20 mols of water evaporated. Now, all we have to do is find how many grams is a mol of water. Molar mass of water is <span>20.16 g/mol.
</span>The final answer is:
$m=20*20.16=403.2g$

7 0

3 years ago

The atomic number of fluorine is 9. How many electrons does an ion of fluorine have if it is represented by the symbol shown bel

Irina-Kira [14]

See charge on ion is -1 .

Hence it has taken 1 electron

Now first look at EC of Fluorine(F)

$\\ \bull\sf\dashrightarrow 1s^22s^22p^5$

Now one electron added .hence no of electrons is 10now

Look at the EC

$\\ \bull\sf\dashrightarrow 1s^22s^22p^6$

Or

$\\ \bull\sf\dashrightarrow [He]$

Option C is correct.

5 0

2 years ago

Read 2 more answers

Recovering the salt from a mixture of salt and water could best be accomplished?

Bumek [7]

Boiling the salt water

3 0

3 years ago

Read 2 more answers

How many grams are in 4.5 moles of NaF?

Ilia_Sergeevich [38]

Answer:

3139542g

Explanation:

That's because if you talk about

4.5

moles of sodium fluoride, you would get a really absurd number of grams.

6 0

2 years ago

PLS HURYYY ILL GIVE BRAINLIEST

ad-work [718]

The volume increases when the balloon temperature increases.

<u>Explanation:</u>

-10 F is converted into Kelvin as 249 K.

0°C is nothing but 0+ 273 = 273 K

And the room temperature is 25°C which is converted into Kelvin as 273 + 25 = 298 K.

249 K is below room temperature.

As per the Charles' law volume and temperature are directly proportional to each other, when the pressure of the gas remains constant.

V ∝ T

As the balloon temperature increases, the volume also increases.

5 0

3 years ago