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3 years ago

although geometry is of Pharmacy and H2O Aadi supported tetrahedral bond angle in water is less than that of ammonia discuss

Chemistry

1 answer:

myrzilka [38]3 years ago

3 0

Answer:

Since the repulsions on the bond pairs in H2O molecule are greater than that in NH3, the bond angle in water is less than that of ammonia...

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A chemist must prepare 400 mL of 1.00M aqueous aluminum sulfate working solution. He'll do this by pouring out 1.82 mol/L aqueou

Digiron [165]

Answer:

219.78 mL of the stock solution are needed

Explanation:

First, we take a look at the desired Al2(SO4)3 working solution. We are told that the we need 400 mL of an aqueous aluminum sulfate solution 1.0 M. Let's see how many moles of the compound we have in the desired volume:

1000 mL Al2(SO4)3 solution ----- 1 mole of Al2(SO4)3

400 mL Al2(SO4)3 solution ----- x = 0.4 moles of Al2(SO4)3

To reach the desired concentration in the working solution we need 0.4 moles of Al2(SO4)3 in 400 mL, so we calculate the volume of the stock solution needed to prepare the working solution:

1.82 moles Al2(SO4)3/L = 1.82 M → This is the molar concentration of the stock solution.

1.82 moles of Al2(SO4)3 ----- 1000 mL

0.4 moles of Al2(SO4)3 ----- x = 219.78 mL

So, if we take 219.78 mL of the 1.82 M stock solution, we put it in a graduated cylinder and we dilute it to 400 mL, we would obtain a 1.0 M Al2(SO4)3 solution.

4 0

3 years ago

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A 0.1149-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter cont

Andreas93 [3]

Answer:

The heat given off by the burning Mg is 30.5 kJ/grams or 745.5 kJ/mol

Explanation:

Step 1: Data given

Mass of magnesium sample = 0.1149 grams

Molar mass of magnesium = 24.3 g/mol

bomb calorimeter that has a heat capacity of 1769 J/°C

Mass of water = 321 grams

Temperature change = 1.126 °C

Step 2: Calculated heat released

Q = (1769 J/°C * 1.126 °C) + (321 grams * 4.184 J/g°C * 1.126 °C)

Q = 3504.18 J =3.504 kJ

Step 3: Calculate the heat given off by the burning Mg, in kJ/g

3.504 kJ / 0.1149 grams = 30.5 kJ/grams

Step 4: Calculate moles of Magnesium

Moles of magnesium = mass magnesium / Molar mass magnesium

Moles magnesium = 0.1149 grams / 24.3 g/mol

Moles magnesium = 0.0047 moles

Step 5: Calculate the heat given off by the burning Mg, in kJ/mol

3.504 kJ / 0.0047 moles = 745.5 kJ/mol

The heat given off by the burning Mg is 30.5 kJ/grams or 745.5 kJ/mol

8 0

3 years ago

If someone gave you flour, sugar, butter, eggs, baking soda, and salt, what could those ingredients turn into?

iren [92.7K]

Answer:

You can make Cake CAke Cake Cake and other stuff too Ig

Explanation:

4 0

3 years ago

Write the balanced molecular and net ionic equations for the reaction between aluminum metal and silver nitrate. identify the ox

asambeis [7]

Well in this case, silver nitrate is reduced:

Ag+ + e− → Ag(s) ↓

Meanwhile, the aluminum is oxidized forming a positive ion:

Al(s) → Al3+ + 3e−

To get the overall reaction, we add the half equations so that the electrons are eliminated:

Al(s) + 3Ag+ → Al3+ + 3Ag(s)

And similarly:

Al(s) + 3AgNO3(aq) → Al(NO3)3(aq) + 3Ag(s)

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3 years ago

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(01.01 MC)

lys-0071 [83]

The answer would be option B "I believe there is life on other planets." Scientific statements have a possibility to be wrong. It's not option A because option A is a opinion. It's not option C because option C is a fact. It's not option D because option D is a opinion.

Hope this helps!

8 0

3 years ago

Read 2 more answers

although geometry is of Pharmacy and H2O Aadi supported tetrahedral bond angle in water is less than that of ammonia discuss ​

although geometry is of Pharmacy and H2O Aadi supported tetrahedral bond angle in water is less than that of ammonia discuss