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3 years ago

How many moles of h2o will be produced from 2.9 g of HCl reacting with Ca(OH)2?

Chemistry

1 answer:

Igoryamba3 years ago

7 0

Answer:

0.080 mol

Explanation:

M(HCl) = (1.0 +35.5) g/mol = 36.5 g/mol

2.9g*1mol/36.5 g = 0.0795 mol HCl

Ca(OH)2 + 2HCl ---> CaCl2 + 2H2O

from reaction 2 mol 2 mol

given 0.0795 mol x mol

x = 0.0795 mol ≈0.080 mol

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Which characteristics best identifies an arrhenius base ?

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It must generate hydroxide ions in the water
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3 years ago

Read 2 more answers

How many atoms is 100.0g of aluminum?

34kurt

Answer:

How many moles are present in 100.0 g of Al? What is the mass of 0.552 mol of Ag metal? Answer a: 3.706 mol

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3 years ago

A stock bottle of an acid reads: 56% by mass and 1.25 specific gravity. If the molar mass of the acid is 70g, find the mole per

TiliK225 [7]

Answer:

10 mol / dm³

Explanation:

Cubic decimeter is the same unit as liter; so, mole per cubic decimeter is mole per liter, and that is the unit of concentration of molarity. Thus, what is asked is the molarity of the solution. This is how you find it.

1. Take a basis: 1 dm³ = 1 liter = 1,000 ml

2. Calculate the mass of 1 liter (1,000 ml) of solution:

density = mass / volume ⇒ mass = density × volume

Here, the density is given through the specific gravity

Scpecific gravity = density of acid / density of water

Take density of water as 1.00 g/ml.

density of solution = 1.25 g/ml

mass solution = 1.25 g/ml × 1,000 ml = 1,250 g

3. Calculate the mass of solute (pure acid)

% m/m = (mass of solute / mass of solution) × 100

56 = mass of solute / 1,250 g × 100

mass of solute = 56 × 1,250g / 100 = 700 g

4. Calculate the number of moles of solute:

moles = mass in grams / molar mass = 700 g / 70 g/mol = 10 mol

5. Calculate molarity (mol / dm³)

M = number of moles of solute / liter of solution = 10 mol / 1 liter = 10 mol/liter.

5 0

3 years ago

Which of the following is not equal to 485 L?

ELEN [110]

Answer:

$4.85 * 10^4\ mL$

Explanation:

Given

485 L

Required

Determine the measurement not equal to 485L

$0.485\ kL$

From standard unit of conversion;

1 KL = 1000 L

Multiply both sides by 485

$485 * 1 KL = 485 * 1000 L$

$485KL = 485000L$

Divide both sides by 1000

$\frac{485KL}{1000} = \frac{485000L}{1000}$

$0.485KL = 485L$ ---- This is equivalent

---------------------------------------------------------------------------------------------

$4.85 * 10^4\ mL$

From standard unit of conversion;

1000 mL = 1 L

Multiply both sides by 485

$485 * 1000 mL = 1 L * 485$

$485000\ mL = 485\ L$

Convert to standard form

$4.85 * 10^5\ mL = 485\ L$

Hence; $4.85 * 10^4\ mL$ is not equivalent to 485L

---------------------------------------------------------------------------------------------

$48500 \ cL$

From standard unit of conversion;

100 cL = 1 L

Multiply both sides by 485

$485 * 100 cL = 1 L * 485$

$48500\ cL = 485\ L$

Convert to standard form

$4.85 * 10^4\ cL = 485\ L$ ---- This is equivalent

---------------------------------------------------------------------------------------------

$4.85 * 10^8 \$ μL

From standard unit of conversion;

1000000 μL = 1 L

Multiply both sides by 485

$485 * 1000000uL = 1 L * 485$

$485000000uL = 485\ L$

Convert to standard form

$4.85 * 10^8\ uL = 485\ L$ ---- This is equivalent

From the list of given options;

$4.85 * 10^4\ mL$ is not equivalent to 485L

4 0

3 years ago

Perform the following unit conversations 134 km to cm, 35 g to ug, 0.65 mmol to mol

blagie [28]

Answer:

4 0

3 years ago