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dusya [7]
3 years ago
13

A student mixes two solutions together. One is believed to be HI, the other is believed to be HNO3. A precipitate forms. Believi

ng the results may be in error the student repeats the process twice in separate wells. After repeating the trial there was no observed precipitate. What is the most likely reason for the initial precipitate result?
Chemistry
1 answer:
4vir4ik [10]3 years ago
5 0

Answer:

The presence of <em>silver nitrate impurities</em> is the most probable cause for the initial precipitate result.

Explanation:

In test for halide ions, silver nitrate AgNO_{3} is used to test for the presence of soluble halide ions. The presence of AgNO_{3} in the reaction mixture (possibly the HNO3) gave the semblance of test for chlorides, allowing for formation of precipitation in the initial experiment.

This error could have been caused by handling of reagents and used laboratory apparatus during the initial reaction.

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A typical thickness for a sheet of paper is 0.004 inches. If you fold a sheet of paper once, the thickness of the folded paper w
Eduardwww [97]

Answer:

Please see the pictures attached below

The first picture has the values and the second has the formulas to construct the spreadsheet.

Explanation:

To construct the spreadsheet you should do the following:

1. First name the four columns as:

Number of folds

Thickness in inches

Thickness in feet

Thickness in miles

2. In the first column "Number of folds" put the numbers from 0 to 50 in order to calculate the thickness of each fold.

3. In the second column "Thickness in inches" put the following formula to show that each fold of a sheet is equal to multiply by 2 the original fold:

Thickness in inches = (thickness in inches(number of folds-1))*2

When the number of folds is 1, the formula will be:

Thickness in inches = 0.000 * 2 = 0.000

When the number of folds is 2, the formula will be:

Thickness in inches = 0.004 * 2 = 0.008

When the number of folds is 3, the formula will be:

Thickness in inches = 0.008 * 2 = 0.016

When the number of folds is 4, the formula will be:

Thickness in inches = 0.016 * 2 = 0.032

And so on until 50.

3. In the third column you only multiply by 0.08333 the value of inches to convert it to feet.

4. And in the fourth column you should multiply the value of inches by 0.0000157828 to convert it to miles.

4 0
3 years ago
There is a part A and B
ladessa [460]

Answer:

Im so confused, and maybe blind bcs I cant read it

Explanation:

Could you explain??

3 0
3 years ago
Read 2 more answers
Determine the frequency of radiation whose wavelength is 7.67 x 10^-7 cm. Then, determine the amount of energy in the radiation.
dimulka [17.4K]

Answer:

They frequency = 3.9 * 10^16 Hz

The amount of energy E = 2.58 *10^-17 J

Explanation:

Step 1: Data given

wavelength is 7.67 * 10^-7 cm

Step 2: Calculate the frequency

f = c / λ

⇒ with  λ = the wavelength in nm = 7.67 nm

⇒ with c = the speed of light  = 3.00 * 10^8 m/s

⇒ f = the frequency = TO BE DETERMINED

f = (3.00 * 10^8 m/s) / 7.67 * 10^-9 m

f = 3.9 * 10 ^16 /s = 3.9 * 10^16 Hz

They frequency is 3.9 * 10^16 Hz

Step 3: Calculate the amount of energy

E  =  h *f

⇒ with E = the amount of energy (in joule)

⇒ h = Planck's constant =  6.626  *10^-34 J*s

⇒ with f = the frequency

E =  6.626  *10^-34 J*s * 3.9 * 10^16 Hz

E = 2.58 *10^-17 J

8 0
3 years ago
When you dropped a hot metal sample into room temperature water in the lab what happened
stira [4]

Answer:

Over time the metal will cool and the water will heat up. Eventually the two objects will have the sametemperature. They are then said to be in thermal equilibrium with one another.

5 0
3 years ago
According to the VSEPR theory, a molecule or ion of NH₃ will have a _____ shape.
Elan Coil [88]

Answer:

B) flat trigonal

Explanation:

All the Hydrogen atoms are arranged symmetrically around the Nitrogen atom which forms the base, and the two nonbonding electrons form the tip

4 0
3 years ago
Read 2 more answers
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