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drek231 [11]
3 years ago
15

Question is in the image

Chemistry
2 answers:
Bond [772]3 years ago
8 0

Answer:

C) 3

Explanation:

Al +  H2SO4 → Al2(SO4)3 + H2

2Al + H2SO4  → Al2(SO4)3 + H2

2Al + 3H2SO4 → Al2(SO4)3 + H2

2Al + 3H2SO4 → Al2(SO4)3 + 3H2

zloy xaker [14]3 years ago
6 0

Answer:(3)

Explanation: 2Al+3H2SO4----->Al(2SO4)3+3H2

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How many milliliters of a 1.25 molar hydrochloric acid (HCl) solution would be needed to react completely with 60.0 grams of cal
stich3 [128]

<u>Answer:</u>

2400 mL

<u>Explanation:</u>

Ca + 2HCl \implies CaCl_2 + H_2

According to this equation, the stoichiometric ratio between Ca and HCl for the complete reaction is 1:2.

We know that the number of moles of Ca can be calculated using the mole formula. (<em>number of moles = mass / molar mass</em>)

Moles of Calcium = \frac{60}{40} = 1.5 mol

So the moles of HCl = 1.5 \times 2 = 3.0 mol

<em>Volume of HCl solution = Moles of HCl/ concentration of HCl</em>

Volume of HCl solution = \frac{3}{1.25} = 2400 mL

4 0
3 years ago
How much heat (in Joules) is needed to raise the temperature of 257g of ethanol (cethanol=2.4 J/g°C) by 49.1°C?
Sonbull [250]

Answer:

Q = 30284.88 j

Explanation:

Given data:

Mass of ethanol = 257 g

Cp = 2.4 j/g.°C

Chnage in temperature = ΔT = 49.1°C

Heat required = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Now we will put the values in formula.

Q = 257 g× 2.4 j/g.°C × 49.1 °C

Q = 30284.88 j

8 0
2 years ago
Which statements describe Earth's continents? Check all that apply.
kari74 [83]

Answer:

A continent is a large distinct landmass.

There are seven continents on Earth.

Continents cover two-thirds of Earth’s surface.

Explanation:

8 0
3 years ago
Baby polar bears learn how to hunt for fish and seals by watching their mother do it.
adoni [48]

Answer:

A

Explanation:

they watched there mother

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3 years ago
What property is used to calculate the ph of a solution
icang [17]
A. The concentration is in mol/L
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