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3 years ago

why does an aluminum horseshoe bend but not break when a blacksmith pounds it into shape with a hammer?

Chemistry

1 answer:

riadik2000 [5.3K]3 years ago

8 0

Answer:

it's because aluminium is a ductile material

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A mixture of bases can sometimes be the active ingredient in antacid tablets. If 0.4884 g of a mixture of Al(OH)3 and Mg(OH)2 is

Nitella [24]

Answer:

54.7%

Explanation:

The reaction of neutralization will be:

Al(OH)₃ + Mg(OH)₂ + 5HNO₃ → Al(NO₃)₃ + Mg(NO₃)₂ + 5H₂O

The number of moles of HNO₃ added is the concentration multiplied by the volume (17.12 mL = 0.01712 L)

n = 1*0.01712 = 0.01712 mol

For the stoichiometry:

1 mol of Al(OH)₃ ---------- 5 moles of HNO₃

x ----------------------------------0.01712 mol

By a simple direct three rule:

5x = 0.01712

x = 3.424x10⁻³ mol of Al(OH)₃

For the stoichiometry, the number of moles of Mg(OH)₂ will also be 3.424x10⁻³.

The molar masses are:

Al(OH)₃: 27 g/mol of Al + 3*16 g/mol of O + 3*1 g/mol of H = 78 g/mol

Mg(OH)₂: 24 g/mol of Mg + 2*16 g/mol of O + 2*1 g/mol of H = 58 g/mol

The mass is the molar mass multiplied by the number of moles:

Al(OH)₃: 78*3.424x10⁻³ = 0.2671 g

Mg(OH)₂: 58*3.424x10⁻³ = 0.1986 g

The mass % of Al(OH)₃ in the mixture is its mass divides by the mass of the mixture, multiplied by 100%:

(0.2671/0.4884)x100% = 54.7%

5 0

3 years ago

Can anyone help me with this?

Ksju [112]

Gasoline, and related fuels have helped society by being a reliable fuel which has powered great things. However these fuels pose hazardous chemicals that can be released into the environment, damaging our valuable ecosystem. Such as greenhouse gasses. However society can overcome these challenges by using other renewable resources. Like power from rivers and wind. In conclusion, great resources have great trade offs.

8 0

4 years ago

The concentration of oxalate ion (C2O42-) in a sample can be determined by titration with a solution of permanganate ion (MnO4-)

zmey [24]

Answer:

0.3152 M

Explanation:

The reaction that takes place is:

2MnO₄⁻ + 5C₂O₄⁻² + 16H⁺ → 2Mn⁺² + 8H₂O + 10CO₂

First we calculate the MnO₄⁻ moles used up in the titration, by multiplying the volume times the concentration:

21.93 mL * 0.1725 M = 3.783 mmol MnO₄⁻

Then we convert MnO₄⁻ moles to C₂O₄⁻² moles:

3.783 mmoles MnO₄⁻ * $\frac{5mmolC_2O_4}{2mmolMnO_4}$ = 9.457 mmol C₂O₄⁻²

Finally we calculate the oxalate ion concentration, by dividing the moles by the volume:

9.457 mmol C₂O₄⁻² / 30.00 mL = 0.3152 M

6 0

3 years ago

How many atoms of hydrogen are present: 2(NaHCO3)

Firlakuza [10]

Answer:

《HOPE IT WILL HELP YOU 》

Explanation:

2 Atom of Hydrogen are present in 2 (NaHCO3)

5 0

3 years ago

Using the difference of electronegativities, determine whether each bond will be nonpolar covalent, polar covalent, or ionic. Sh

kati45 [8]

Answer:

Explanation:

7 0

3 years ago