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FrozenT [24]
4 years ago
7

Will Na2Co3 turn red litmus paper to blue?​

Chemistry
2 answers:
zlopas [31]4 years ago
7 0

Answer:

106

Explanation:

agasfer [191]4 years ago
6 0
Yes as Na2Co3 is alkaline then alkaline turns from red to blue
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Calculate the heat released when 454 grams of steam at 100 degrees C condenses.
sasho [114]
<h3>Answer:</h3>

1026.05 kJ

<h3>Explanation:</h3>
  • The Quantity of heat is calculated by multiplying the mass of a substance by specific heat capacity and the change in temperature.
  • However, condensation takes place at a constant temperature.
  • Therefore, Quantity of heat is calculated by multiplying mass by the latent heat of vaporization.
  • That is; Q = m × Lv

In this case we are given;

Mass of steam as 454 g

To calculate the amount of heat released we must know the value of latent heat of vaporization;

The latent heat of vaporization of steam is 2260 J/g

Therefore;

Heat released, Q = 454 g × 2260 J/g

                             =1026040 Joules

But, 1000 joules = 1 kilo-joules

Thus, Q = 1026.04 kJ

Hence, the amount of heat released is 1026.05 kJ

5 0
3 years ago
The chemical equation below shows the combustion of propane (C3H8). C3H8 + 5O2 --&gt; 3CO2 + 4H2O What mass of O2, in grams, is
Over [174]

Answer:

plk

Explanation:

7 0
3 years ago
If 10 moles of H2O are produced how many moles of CO2 are also produced.
Sedbober [7]
You need the equation to solve, like the relation between water and carbon dioxide!
4 0
4 years ago
What makes a proton important
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4 0
3 years ago
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PLEASE HELP ASAP!!!
kogti [31]
1 CH4 (g) + 2 O2 (g) -----> CO2 (g) + 2H2O(l) ΔH= - 890 kJ
1 mol           2 mol
1)  If ΔH has minus, it means "release". We need only "release" choices.<span>
2) From reaction
1 mol </span>CH4 (g)  "releases"  ΔH= - 890 kJ  - We do not have this choice.

2 mol  O2 (g)   "release" ΔH= - 890 kJ, so
1 mol  O2 (g)   "release" ΔH= - 445 kJ
Correct answer is B.
3 0
3 years ago
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