The element represented by [Xe]6s' is

Answer:

HNO2

Explanation:

It is a pale blue solution and it is only known in solution and gas form.

Answer:

2.0×10⁻⁶ mol

Prefix = (2)  

exponent = (-6)

Explanation:

Given data:

Number of molecules of water = 1.23×10¹⁸ molecules

Number of moles of water = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules of water

1.23×10¹⁸ molecules × 1 mol / 6.022 × 10²³ molecules

0.20×10⁻⁵ mol

2.0×10⁻⁶ mol

Prefix = (2)  

exponent = (-6)

Answer: A man-made object that has been changed by weathering is the pyramids. The pyramids in Egypt have weathered slowly because of the dryness of the desert, but they have indeed weathered throughout the years.

Answer:

In a Lewis symbol, the symbol for the element is used to represent the atom and its core electrons. Dots placed around the atom are used to indicate the valence electrons. ... In 1916, Gilbert Newton Lewis, an American chemist, suggested that molecules were formed when atoms shared pairs of outer electrons.

Explanation:

Lewis structures show the electrons in the valence shell of atoms in molecules.

Lewis structures are representations of molecules. They consist of the symbol of the element and the valence electrons in the atoms. The electrons are often shown as dots.

The atoms in molecules could be lone pairs or bond pairs. The bond pairs are shown as two dots on an atom. Since lone pairs are localized on an atom, they are shown as dots on the symbol of the atom that contain them.

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Answer:

Each magnet has a north and south end. Only opposite ends can attract, But if the ends are the same, they push away from each other. Magnets in some engines make it spin in a certain direction.

Answer:

56) 5,722 mL

57) 750 meters

58) 88 km/hr

59) 88 km/? (I can't give you a complete answer if there's no other unit)

60) 5,169g

61) 53.1m/sec

Explanation:

When you are doing sig figs you do its operations normally. However the way you round depes on the operation;

When you are adding or subtracting sig figs you round to the least number of decimal places. In the case where there is no decimal place keep it the same

When you are multiplying or diving sig figs you round to the least amount of sig figs

The work is in the picture

Answer:

It sounds like they are studying French phonemes

Explanations:

I just learned this.

The students were most likely studying French phonemes.

Words are distinguished from each other by respective sounds of the vowels in the word. There are open vowels and there are closed vowels. These exist in every language.

The part of language learning that has to do with the differentiation of pronunciation of sounds is called phonemes. This means that the students were most likely studying French phonemes.

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Explanation:

The kinetic energy of an object is given by :

[tex]K=\dfrac{1}{2}mv^2[/tex]

1. Mass, m = 5 kg

Speed, v = 2 m/s

[tex]K_1=\dfrac{1}{2}\times 5\times (2)^2\\\\=10\ J[/tex]

2. Mass, m = 71 kg

Speed, v = 1 m/s

[tex]K_2=\dfrac{1}{2}\times 71\times (1)^2\\\\=35.5\ J[/tex]

3.  Mass, m = 71 kg

Speed, v = 5 m/s

[tex]K_3=\dfrac{1}{2}\times 71\times (5)^2\\\\=887.5\ J[/tex]

4. Mass, m = 1816 kg

Speed, v = 25 m/s

[tex]K_4=\dfrac{1}{2}\times 1816\times (25)^2\\\\=567500\ J[/tex]

Answer:

-Acetone is a covalent compound, while sodium chloride is an ionic compound

-covalent compounds have weak attractions between molecules, resulting in low melting points

Explanation:

Answer:   A and C mah dudes

Explanation:   Edgy 2020   <3

Answer:

option D generally higher

Answer:

The halogenation of propane discloses an interesting feature of these reactions. All the hydrogens in a complex alkane do not exhibit equal reactivity. For example, propane has eight hydrogens, six of them being structurally equivalent primary, and the other two being secondary

In mercuric oxide percent by mass of mercury is 93 %.

The mercuric oxide molecular formula is HgO. When mercury is reacted with oxygen, then it forms the product mercuric oxide. Mercuric oxide has a molecular mass of 216 g/mol. It has a melting point of 500°C.

The balance equation for the reaction of decomposition of mercury oxide into mercury and oxygen is,

[tex]2HgO (s)→ 2Hg (l) + O _{2}(g)[/tex]

Mass of mercury oxide = 28.4 g

Mass of the oxygen = 2 g

In mercuric oxide percent by mass of mercury is,

[tex]Mass ℅= \frac{Mass \: of \: Mercury }{Mass \: of \: Mercury \: oxide} \times 100[/tex]

[tex]= \frac{28.4 - 2}{28.4} \times 100[/tex]

= 93 %

Therefore, in mercuric oxide percent by mass of mercury is 93 %.

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Answer:

Filled with Light or Very Bright

Explanation:

I took the quiz.

Answer:

your answer is the third one filled with light and very bright

Explanation:

i got it right on the quiz hope it helps

Answer:

Remember, chemical reactions follow the law of conservation of mass. Chemical equations show this conservation, or equality, in terms of atoms. However, simply writing down the chemical formulas of reactants and products does not always result in equal numbers of atoms

Explanation:

Answer:

Yes

Explanation:

i think so as there are 2 h on the left

Explanation:

I'm not sure what it is

The chemical formula for the compound is AB₂C₄.

A chemical formula is define as a formula which identifies each constituent element by its chemical symbols, and indicate the proportionate number of atom of each elements.

Chemical formula is can also be called as empirical formula.

Example - Chemical formula for water is H₂O.

Chemical formula provides chemical composition of a compound.

Chemical formula of a compound is crucial when it represents a chemical equation.

Thus, the chemical formula for the compound is AB₂C₄.

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The mean mass of the given sample is 39.12g

mass of first sample = 39.75g

mass of second sample = 38.91g

mass of third sample = 37.66g

mass of fourth sample = 39.75g

mass of fifth sample= 39.55g

Total mass of the sample = 39.75 g + 38.91 g+ 37.66 +39.75 g + 39.55 g = 195.62 g

Number of samples = 5

Therefore mean mass of the samples = 39.12g

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Answer:

MgO (Magnesium Oxide)

Explanation:

K20 = 1,343° ±5° C

MgO = 5,166°F (2,852°C)

MgO > K20

Answer:

the process of separating several mixtures of coal with the process of fractional distillation

Explanation:

Answer:

S4O5

Explanation:

Answer:

A

Explanation:

it can be help to remove mood swing

Answer:

Bipolar disorder

Explanation:

People with bipolar disorder face extreme episodes of different moods, so mood stabilizers help calm those extremes down and allow the person to retain a consistent mood.

No, his digestive system is breaking down starch molecules, but his respiratory system may not be working properly.

Oat starch which is mainly stored in the oat endosperm is the most abundant carbohydrate component of oats, and its content varies between 40-50% depending on the variety and growing conditions. Sayer and White 2011. Starch after extraction of oat amylose content lipids was determined by Gudmundson and Eliasson.

Whole grain oats contain large amounts of valuable nutrients such as protein starch unsaturated fatty acids, and dietary fiber in soluble and insoluble fractions. Starch is composed of two glucose polymers amylopectin, and amylose which together form insoluble semi-crystalline starch granules. Both polymers are composed of conjugated glucan chains connected by branch points, but their structure and biosynthesis differ.

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Answer:

46.07

Explanation:

im not 100 sure this is right almost tho

please mark brainliest

Answer:

Metallic Bonding

Explanation:

Zinc is a metal, as such it's atoms are held together by the metallic bond. Metallic bond is a type of chemical bond formed between positively charged ions in which there is a collective sharing of a sea of valence electrons.

Answer:

In chemistry, a structural isomer (or constitutional isomer in the IUPAC nomenclature) of a compound is another compound whose molecule has the same number of atoms of each element, but with logically distinct bonds between them. The term metamer was formerly used for the same concept.

Explanation:

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