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Novosadov [1.4K]
3 years ago
15

What is the net ionic equations for NaHCO3 —> H2O + CO2 + NaCO3?

Chemistry
1 answer:
Brilliant_brown [7]3 years ago
8 0

The Answer is  2 NaHCO3(s) = Na2CO3(s) + CO2(g) + H2O(g)

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What mass of potassium hydroxide is required to react completely with 2.70 grams of sulfuric acid to produce potassium sulfate a
Reptile [31]
1) first, write the balanced equation:

2KOH + H₂SO₄ ---> 2H₂O + K₂SO₄

2) convert grams of sulfuric acid to mole using it's molar mass. 

molar mass H₂SO₄= (2 x 1.01) + 32.0 + (4 x 16.0)= 98.0 g/mol

2.70 grams (1 mol/ 98.0 grams)= 0.0276 moles

3) use the mole to mole ratio from the balanced equation to change the moles of sulfuric acid to moles of potassium, hydroxide (KOH).

ration--->2 mol KOH = 1 mol H₂SO₄

0.0276 mol H₂SO4 (2 mol KOH/ 1 mol H₂SO₄)= 0.0551 mol KOH

4) convert moles to grams using the molar mass of KOH

molar mass of KOH= 39.1 + 16.0 + 1.01= 56.1 g/mol

0.0551 mol (56.1 grams/ 1 mol)= 3.09 grams

8 0
4 years ago
Evolution happens by which process?
ivanzaharov [21]

Answer:

a

Explanation:

7 0
3 years ago
The pressure of 8.40 L of nitrogen gas in a flexible container is decreased to one-half its original pressure, and its absolute
ollegr [7]

Answer:

33.6 L

Explanation:

From the question given above, the following data were obtained from:

Initial volume (V1) = 8.40 L L

Initial pressure (P1) = P

Initial temperature (T1) = T

Final pressure (P2) = one-half the original pressure = ½P

Final temperature (T2) = double the original temperature = 2T

Final volume (V2) =.?

Thus, the new volume of the gas can be obtained as follow:

P1V1/ T1 = P2V2 /T2

P × 8.40 / T = ½P × V2 /2T

P × 8.40 / T = P × V2 / 4T

Cross multiply

T × P × V2 = P × 8.40 × 4T

Divide both side by T × P

V2 = (P × 8.40 × 4T) /T × P

V2 = 8.40 × 4

V2 = 33.6 L

Thus, the new volume of the gas is 33.6 L

7 0
3 years ago
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l): ΔH = −890 kJ
V125BC [204]

Answer:

The reaction of one mole of oxygen (O2) releases 445 kJ of energy.

Explanation:

Firstly, the reaction is exothermic since the sign of enthalpy change ΔH  is negative.

The balanced equation: CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l): ΔH = −890 kJ,

Shows that 1 mole of CH₄ react with 2 moles of oxygen and releases 890 kJ.

So, every choice says that absorb is wrong (choice 1& 3).

Choice no. 4 is wrong since it says that 2 moles of methane releases 890 kJ, because only one mole release this amount of energy.

So, the right choice is The reaction of one mole of oxygen (O2) releases 445 kJ of energy.

5 0
3 years ago
How many pints are in a 48 cups?
Feliz [49]
1 cup = 2 pints

48 × 2 = 96 pints

HOPE THIS HELPED
:)
8 0
3 years ago
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