What is the answer to this question?
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Given the balanced equation representing a reaction:CH4(g) + 2O2(g) --> 2H2O(g) + CO2(g) + heatWhich statement is true about energy in this reaction?(1) The reaction is exothermic because it releases heat.(2) The reaction is exothermic because it absorbs heat.(3) The reaction is endothermic because it releases heat.(4) The reaction is endothermic because it absorbs heat.
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Which type of perspective makes objects look similar to how they look in real life (select the best answer)linear perspective fractional perspective isometric perspective
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Answer:
A molecule with hydrogen bonded to to O, N, or F
Explanation:
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So we are going to take our known value of 4 moles, and multiply by 6.02 x 10^23 (Avogadro's number) and we will get the number of atoms that are in 4 moles.
(4.0 moles of Na) x (6.02 x 10^23) / (1 mole) = 2.4 x 10^24 atoms of Na
There are 2.4 x 10^24 atoms of Na in 4.0 moles.
Final answer:
To find the number of atoms in 4.0 Mol of sodium, you need to multiply the number of moles by Avogadro's number. This will give you approximately 2.4088 x 10^24 atoms.
Explanation:
To calculate the number of atoms in 4.0 Mol of sodium, you need to use Avogadro's number, which is 6.022 x 1023 atoms per mole. The calculation is as follows:
Start with the number of moles given, which is 4.0 mol.Multiply this by Avogadro's number (6.022 x 1023) to get the total number of atoms:4.0 mol x 6.022 x 1023 atoms/mol = 2.4088 x 1024 atoms
So, there would be approximately 2.4088 x 1024 atoms in 4.0 mol of sodium.
Learn more about Avogadro's number here:
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Answer:
t = 50,000s
Explanation:
Reaction is second order.
Initial conc. [A]o = 0.020 M
Rate constant = 1.0x10-3 M-1s-1
Final conc. [A] = 0.010M
Time = ?
1 / [A] = kt + 1 / [A]o
Substituting the values;
1 / 0.010 = 1.0x10-3 * t + (1/0.020)
100 - 50 = 1.0x10-3 * t
t = 50 / (1.0x10-3)
t = 50,000s
Answer:
Time required is 50000s
Explanation:
General formula of a second-order reaction is:
Where [A] is concentration of reactant after time t passed, [A]₀ is initial concentration of reactant and K is rate constant of reaction.
Replacing:
50M⁻¹ = 1.0x10⁻³M⁻¹s⁻¹ t
50000s = t
Thus, after 50000s, the reactant concentration decrease from 0.020M to 0.010M
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2 mol * 23 g Na = 46 g
2*35,5 g Cl = 71
46 g Na --------- 71 g Cl₂
460 g Na -------- ?
mass ( Cl₂) = 460 . 71 / 46
Mass (Cl₂) = 32660 / 46
m= 710 g of Cl₂
hope thips helps
B.) sand & water
C.) Italian salad dressing
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you would physically separate sand and water
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Answer:
A) The partial presssure of CO₂ is 167 mm Hg
B) The partial presssure of N₂ is 354 mm Hg
C) The partial presssure of Ar is 235 mm Hg
D) The partial presssure of H₂ is 86 mm Hg
Explanation:
Dalton's law of partial pressures is basically expressed by the following statement:
The total pressure of a mixture is equal to the sum of the partial pressures of its components.
So initially we have:
= total presure of the system (675 mm Hg).
= partial pressure of N₂ (354 mm Hg).
= partial pressure of Ar (235 mm Hg).
Using Dalton's law we can find the partial pressure of H₂:
675 mm Hg=354 mm Hg + 235 mm Hg +
= 675 mm Hg - 354 mm Hg - 235 mm Hg
=86 mm Hg
If CO₂ gas is added to the mixture, at constant temperature, and the volume is the same, the difference between the new total pressure and the previous total pressure is equal to the partial pressure of CO₂.
842 mm Hg= 354 mm Hg + 235 mm Hg + 86 mm Hg +
= 842 mm Hg - 354 mm Hg - 235 mm Hg - 86 mm Hg
= 167 mm Hg