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sdas [7]
4 years ago
7

Which statement correctly describes the reactivity of noble gases, according to the octet rule?

Chemistry
1 answer:
Natali5045456 [20]4 years ago
8 0
Answer:


Their atoms have eight electrons in their valence shells, so noble gases are very unreactive.
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stu dent has a large sample of a unknown solid material that is to big to fit into a graduated cylinder. he knows that it will n
Yakvenalex [24]

The density of the solid is  6.724 g/ml.

Density is the number of factors which can be people, animals, vegetation, or objects in a sure place. To calculate density, you divide the number of objects by the dimension of the place. The populace density of a rustic is the wide variety of human beings in that us of a divided by means of the location in square kilometers or miles.

The density of an amount to being counted is its mass divided by means of its quantity. it also includes measured at zero °C and at 1 atmosphere of stress. Density is vital in figuring out the buoyancy of materials in fluids, as well as in evaluating materials and other measurements.

The density of an object is certainly one of its maximum crucial and easily-measured physical properties. Densities are extensively used to perceive natural substances and to represent and estimate the composition of many varieties of combos.

density = mass/ volume

      = 975g/145ml

      = 6.724 g/ml

Learn more about density here:-brainly.com/question/1354972

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7 0
2 years ago
If the density of chloroform is 1.5 g/cm³, what is the mass of 50.0 cm³ of chloroform?
Marianna [84]
Density = mass / volume

1.5 = m / 50.0

m = 1.5 x 50.0

m = 75 g

hope this helps!
6 0
4 years ago
Read 2 more answers
Mrs. Allen is about to have another baby. She already has three daughters. What is the probability that her fourth child will al
Marat540 [252]

Answer:

The probability her 4th child will be a girl is 0.5

Explanation:

during pregnancy or child birth, the gender of a baby is not affected by the gender of the previous baby in the womb. Rather it is determined by the type of chromosomes supplied by the father of the baby.

If X chromosomes are supplied, a girl will be born because the baby will have xx chromosomes. If Y chromosomes are supplied, the baby will have YY chromosomes which means that he is a boy.

Hence there are equal chances of the baby being a boy or a girl, each time a woman is pregnant. The probability of the baby being  a boy or a girl is the same and it 0.5

7 0
4 years ago
28. A gas exerts pressure at 5atm at 300K. What is the pressure of the gas at 600K?
ch4aika [34]
B the atm hehsjskkakajahhajajajajjajajajsjsjjsjsjsnsnnsns
7 0
3 years ago
The valency of both Oxygen and magnesium is 2 give reason <br><br>​
lidiya [134]

Answer:

<em>the <u>valency of an element</u> is its combining capacity that is the number of electrons it requires to lose, gain or share in order to become neutral.</em>

[ An element can become neutral if it completes it's octet. That is if an element has 8 electrons in it'd outermost shell then it is considered neutral ]

  • The valence of Magnesium is 2 because it requires to lose 2 electrons to become neutral.

  • whereas, the valence of Oxygen is 2 because it needs to gain 2 electrons to become stable.

Hence they both have the same valence.

One may say that oxygen's valence is -2 while that of Magnesium is + 2. It's meaning is still the same but "-" sign indicates that oxygen will be gaining electrons in the process of becoming stable.

7 0
3 years ago
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