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Mila [183]
2 years ago
10

Rank the elements according to their metallic character.

Chemistry
1 answer:
Vika [28.1K]2 years ago
7 0

Answer: most metallic Bi > Sb >As >P least metallic

Explanation:

Elements in same column of periodic table increase in metallic characters as you move down the periodic table

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When you use a crowbar to lift a large rock, you are working against the force called
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Gravity. The rock is being pushed down and you are counteracting that force with a crowbar pushing it upward.
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3 years ago
Given that cao(s) + h2o(l) → ca(oh)2(s), δh°rxn = –64.8 kj/mol, how many grams of cao must react in order to liberate 525 kj of
USPshnik [31]

Answer:

454.3 g.

Explanation:

  • From the given data:

1.0 mol of CaO liberates → – 64.8 kJ.

??? mol of CaO liberates → - 525  kJ.

∴ The no. of moles needed = (1.0 mol)(- 525 kJ)/(- 64.8 kJ) = 8.1 mol.

<em>∴ The no. of grams of CaO needed = no. of moles x molar mass</em> = (8.1 mol)(56.077 g/mol) = <em>454.3 g.</em>

8 0
2 years ago
Silver chloride was reacted with magnesium hydroxide, in which magnesium displaced silver
Elza [17]

Answer:

<h3>The precipitate is MgCl2</h3>

Explanation:

The reaction that is described goes as follows:

2AgCl + Mg(OH)2 ---> MgCl2 + 2AgOH

The precipitate here is the MgCl2 salt.

I hope it helped!

8 0
3 years ago
Mass of sodium + nitrogen +oxygen+ oxygen+ oxygen =
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Answer:

Oxygen's atomic weight is 16.00 amu. 1 mole of oxygen is 6.02 x 1023 atoms of oxygen 1 amu = 1.661 x 10-24g What is the molar mass (g/mole) of oxygen? Molar mass (in grams) is always equal to the atomic weight of the atom!

Explanation:

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5 0
3 years ago
Read 2 more answers
How many moles of water molecules are in 57.43 g of iron (iii) chloride dihydrate
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Explanation:

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6 0
3 years ago
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