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2 years ago

GIVING BRAINIEST FIVE STARS AND HEART! '

Chemistry

2 answers:

son4ous [18]2 years ago

3 0

Answer:

Above pH 8.3, a blue litmus paper stays blue but turns red in an acid. A neutral solution, or one between the upper and lower values of litmus paper, pH 4.5 and 8.3, will not change the paper's color

Explanation:

aliya0001 [1]2 years ago

3 0

Answer:

<h3>A basic (alkaline solution) chemical with high pH (>7) turns red litmus paper blue.</h3>

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What is the frequency of a photon with a wavelength of 1040 nm. Report your answers to three significant digits. The frequency i

Sav [38]

Answer:

$Frequency=2.88\times 10^{14}\ s^{-1}$

Explanation:

The relation between frequency and wavelength is shown below as:

$c=frequency\times Wavelength
$

c is the speed of light having value $3\times 10^8\ m/s$

Given, Wavelength = 1040 nm

Also, 1 m = $10^{-9}$ nm

So,

Wavelength = $1040\times 10^{-9}$ m

Thus, Frequency is:

$Frequency=\frac{c}{Wavelength}$

$Frequency=\frac{3\times 10^8}{1040\times 10^{-9}}\ s^{-1}$

$Frequency=2.88\times 10^{14}\ s^{-1}$

6 0

3 years ago

Express as an ordinary number.<br><br> 3.85 x 10 -3 =<br><br> 0.00385<br> 3,850<br> 0.385

Rzqust [24]

0.00385. Have a great day :)

6 0

3 years ago

Read 2 more answers

A 520-gram sample of seawater contains 0.317 moles of NaCl. What is the percent composition of NaCl in the water?

Volgvan

Answer:

Explanation:

8 0

3 years ago

Why does knowing types of mixtures help you to identify a substance?

Reil [10]

Answer:

This is my own explanation:

Explanation:

It is important to know the mixtures you input together because you may determine the type of substance you produced from different elements and several combinations of matter. This assists in identifying your specific substance.

8 0

2 years ago

Enter your answer in the provided box.

Lina20 [59]

Answer:

5.06atm

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (Litres)

V2 = final volume (Litres)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

P1 = 1.34 atm

P2 = ?

V1 = 5.48 L

V2 = 1.32 L

T1 = 61 °C = 61 + 273 = 334K

T2 = 31 °C = 31 + 273 = 304K

Using P1V1/T1 = P2V2/T2

1.34 × 5.48/334 = P2 × 1.32/304

7.34/334 = 1.32P2/304

Cross multiply

334 × 1.32P2 = 304 × 7.34

440.88P2 = 2231.36

P2 = 2231.36/440.88

P2 = 5.06

The final pressure is 5.06atm

6 0

2 years ago