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3 years ago

Random poitn drop , get it quickly

Chemistry

2 answers:

algol133 years ago

7 0

Answer:

THANK YOU

Explanation:

thx boo<3

BabaBlast [244]3 years ago

3 0

Answer:

thank you!!!!!!!!!!!!!!!!!!!!!!

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What is the molecular mass of Br 2?

Kazeer [188]

Answer:

159.808 g/mol

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2 years ago

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Use the balanced equation from number four above to determine the limiting reactant if we had a mixture of 5.0 moles of Fe and 4

Tom [10]

Answer:

2Fe + 3O₂ → 2Fe₂O₃

Limiting reactant: O₂

2Fe + O₂ → 2FeO

Limiting reactant: Fe

Explanation:

2Fe + 3O₂ → 2Fe₂O₃

2Fe + O₂ → 2FeO

These are the possible reactions:

In first case, 2 moles of Fe need 3 mol of oyxgen to react

If I have 5 moles of Fe, I will need (5 .3)/2 = 7.5 moles of O₂

Then, the oxygen is my limiting ( I only have 4 moles)

3 moles of O₂ need 2 moles of Fe

If I have 4 moles of O₂, I will need (4 .2)/3 = 2.66 moles (I have 5)

Fe, is the reactant in excess.

For second case, 2 moles of Fe need 1 mol of O₂, to react.

If I have 5 moles of Fe, I will need ( 5 .1) / 2 =2.5 moles of O₂

I have 4 moles of oxygen, so now it is my excess.

1 mol of O₂ need 2 moles of Fe, to react

If I have 4 moles of O₂, I will need the double of amount, 8 moles of Fe.

I have 5 moles, then the Fe is my limtiing reactant.

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2 years ago

how many covalent bonds does a phosphorus atom normally form, based on the number of valence electrons in the atom?

Alexandra [31]

Triple covalent bond I guess

8 0

3 years ago

If you are diving and playing in the waves near a beach and suddenly find that you are being

Nat2105 [25]

Answer: Wind current

Explanation:

The wind current is the main driving force along with the water currents when one reaches to the seashore. The wind currents above surface of water generates due to the evaporation of water.

The strong wind currents can pull any animal or human walking or running near the sea shore. These currents bring the animal or human towards the sea.

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2 years ago

Determine the number of moles in 258.45 grams of iron (III) chloride (FeCl3). Show and explain all

QveST [7]

Answer:

$\boxed {\boxed {\sf 1.5935 \ mol \ FeCl_}}$

Explanation:

To convert from grams to moles, we must use the molar mass. This can be found on the Periodic Table. First, find the molar mass of iron and chlorine.

Fe: 55.84 g/mol
Cl: 35.45 g/mol

Check the formula. There is a subscript of 3 after Cl, so there are 3 atoms of chlorine in 1 molecule. Multiply iron's molar mass by 3, then add iron's molar mass.

FeCl₃: 55.84 + 3(35.45) = 55.84+106.35=162.19 g/mol

Use this number as a ratio.

$\frac {162.19 \ g\ FeCl_3}{1 \ mol \ FeCl_3}$

Multiply by the given number of grams.

$258.45 \ g \ FeCl_3 *\frac {162.19 \ g\ FeCl_3}{1 \ mol \ FeCl_3}$

Flip the ratio so the grams of iron (III) chloride cancel.

$258.45 \ g \ FeCl_3 *\frac {1 \ mol \ FeCl_3}{162.19 \ g\ FeCl_3}$

$258.45 *\frac {1 \ mol \ FeCl_3}{162.19}$

$\frac {258.45 \ mol \ FeCl_3}{162.19}$

$1.59350144892 \ mol \ FeCl_3$

The original measurement of grams has 5 significant figures, so our answer must have the same. For the number we calculated, that is the ten thousandth place.

$1.5935 \ mol \ FeCl_3$

258.45 grams is approximately 1.5935 moles of iron (III) chloride.

3 0

3 years ago