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slava [35]
1 year ago
10

1. Why do you think pepper behaved the way it did in this experiment? What do you think that sugar and salt would do?

Chemistry
1 answer:
goblinko [34]1 year ago
6 0

The experiment is related to the demonstration using Pepper. When pepper is spread over water, it clumps together This is because pepper is hydrophobic. When repeated with sugar and salt, they instantly dissolved. This means they are attracted to water. When also sprinkled on the surface of the water, it floats. This is caused by surface tension.

To break the surface tension of water, one can use aeration or the use of chemicals such as soap molecules which contain a long chain of hydrogen as well as carbon atoms.

<h3>What is surface tension?</h3>

Surface tension is the propensity of liquid surfaces at rest to shrink to the smallest feasible surface area. Surface tension permits items with a higher density than water, such as razor blades and insects (such as water striders), to float on the water's surface without being immersed.

A force tensiometer can be used to measure surface tension. The forces exerted on a probe situated at the liquid-gas or liquid-liquid interface are measured by these devices.

Learn more about Surface Tension:
brainly.com/question/11348644?
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I NEED HELP ASAP!!!!!! LIKE RIGHT NOW PLEASE HELP!!!!! TwT
Alex

Thermometer D, because it measures accurately to the tens place. Hence, option B is correct.

<h3>What is temperature?</h3>

The degree of hotness or coldness is measured on a definite scale.

Accuracy: It is defined as the closeness of a measured value to a standard or known value.

For Example: If the mass of a substance is 50 kg and one person weighed 48 kg and another person weighed 55 kg. Then, the weight measured by the first person is more accurate.

Precision: It is defined as the closeness of two or more measurements to each other.

For Example: If you weigh a given substance five times and you get 1.8 kg each time. Then the measurement is said to be precise.

The level of precision is determined by the maximum number of decimal places.

As per the question, the thermometer D has markings 40°, 45° and 50° at equal intervals and there are four small markings equally spaced in between the numbers and thermometer D has markings 40°, 45° and 50° at equal intervals but there are no small markings equally spaced in between the numbers. That means thermometer D measures temperature more accurately than thermometer C.

Thermometer D, because it measures accurately to the tens place. Hence, option B is correct.

Learn more about the thermometer here:

brainly.com/question/14900550

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3 0
2 years ago
True or False:
Juli2301 [7.4K]

Answer:

Explanation:

From the work of Krogh in 1918 until the present time, a very wide range of values for oxygen diffusion coefficients has been reported1–5 ranging from 1.1 × 10−4 to 4 × 10−8 cm2 sec−1.

7 0
3 years ago
What describes the basis of the band theory of metallic bonding
Serjik [45]
Metals have their valence band filled, and due to the absence of a band gap, their conduction band partially filled.


The theory predicts that metals will conduct (both heat and) electricity very well and so is generally accepted.
6 0
3 years ago
What did the 15th amendment do
Alisiya [41]

The 15th Amendment to the Constitution granted African American men the right to vote by declaring that the "right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude."

6 0
3 years ago
Please help, due tomorrow! ツ
oksano4ka [1.4K]

There are two kinds of mixtures

a) homogeneous : the boundary of the two components is not physically distinct

b) heterogeneous:the boundary of the two components is  physically distinct

the following separation techniques are common for mixtures

1) filtration: if the two components are forming heterogeneous mixture we can separate them by filtration.

2) boiling: if boiling point of one of the components is less than other

3) magnetic separation: if one of the component is magnetic

4)sieve method: for solid components with difference in size of particles

5) hand picking

Thus the correct match will be as shown in the figure


3 0
3 years ago
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