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natima [27]
3 years ago
5

Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional

questions.
Online Content: Site 1

How might physical weathering affect a sample? (site 1) (hurry im begging u!)
Chemistry
2 answers:
Vlad [161]3 years ago
7 0
Can anyone help me with my one question on my stuff?
Paha777 [63]3 years ago
7 0

Answer:

Sorry I was late but here you go

Explanation:

Physical weathering can affect a sample by changing the characteristics of the rock and they can be changed into boulders, cobbles, pebbles, sand, silt, clay, and colloids.

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True or false, water boils at 100°c
r-ruslan [8.4K]

Answer:

This is true

Explanation:

3 0
3 years ago
Bohr models notes <br> The number of periods shows you the number of _______
lorasvet [3.4K]

Answer:

The number of periods shows you the number of _______

<u>Electron Shell</u>

<u></u>

Explanation:

<u><em>Modern periodic table is divided into Groups and Periods.</em></u>

A period is the horizontal row of the periodic table. There are <u>seven periods </u>in the periodic table.

It describes the following :

  • The period in which a particular element found will show its <u>electron shell</u>
  • The first period has Hydrogen and Helium = 1 - shell
  • The second Period has Lithium to neon = 2- shells

A group is the vertical column of the periodic table . There are <u>18 groups</u> in total.

It describes the following :

The group number of the element is same as the<u> number of electrons in the outermost shell.</u>

The element having group 1 has = 1 electron in outer shell (example Na, K)

The element having group 2 has = 2 electron in outer shell (example Ca, Mg)

The element having group 0 has = full outer shell (example Ne Xe). these are also known as noble gases

8 0
4 years ago
Arrange the bromine-containing compounds CaBr2, Br2, NBr3, CBr4 in order of increasing predicted boiling point.
Fudgin [204]

Explanation:

In an ionic compound, there will be strong force of attraction between the combining atoms due to the opposite charges present on them.

For example, CaBr_{2} is an ionic compound where calcium has a +2 charge and each bromine atom has a -1 charge.

Therefore, in order to break the bond we need to provide more heat. Hence, boiling point of calcium bromide will be the highest.

NBr_{3} is a covalent compound and as nitrogen is more electronegative in nature and also has a lone pair of electron hence, there will be a net dipole moment.

CBr_{4} is also a covalent compound. And, as bromine is more electronegative than carbon atom so, dipole moment is in the outwards direction. Hence, in CBr_{4} there will be zero dipole moment.

Therefore, its boiling is less than the boiling point of NBr_{3}.

Br_{2} is a covalent compound and there will be no dipole moment.

Thus, we can conclude that given bromine-containing compounds are placed in their increasing boiling point order as follows.

    Br_{2} < CBr_{4} < NBr_{3} < CaBr_{2}

3 0
4 years ago
22 You have the following acids and their conjugate bases available: Acetic Acid: CH 3COOH/CH3COO-; Ka = 1.8 × 10-5 Carbonic Aci
lana66690 [7]
Acetic acid is the closest to 4.5 in my opinion.
8 0
3 years ago
Calculate the molarity, molality and mole fraction of ethanol in its 20% aqueous solution. (No other values are given).
Alenkasestr [34]

Answer:

X(EtOH) = 0.0891

X(H₂O)   = 0.9109

Explanation:

Given 20% aqueous solution ethanol.

Ethanol => C₂H₅OH (or, EtOH) => molecular weight = 46 g//mole

20% solution by weight = 20 grams EtOH / 100 grams of solution

20 grams EtOH / 100 grams of solution = 20 grams EtOH + 80 grams H₂O

moles EtOH = (20g/46g/mol) = 0.4348 mole

moles H₂O  = (80g/18g/mol) = 4.4444 mole

moles EtOH + moles H₂O = 0.4348 + 4.4444 = 4.8792

X(EtOH) = 0.4348/4.8792 = 0.0891

X(H₂O)   = 4.4444/4.8792 = 0.9109

∑mole fractions must equal 1.000 => 0.0891 + 0.9109 = 1.000 (check!)

7 0
3 years ago
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