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Fed [463]
3 years ago
9

Aluminum and sulfur will combine to make a compound.

Chemistry
1 answer:
qwelly [4]3 years ago
4 0
AI2S3 is your answer
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How are the O and A horizons similar?
Alex Ar [27]
An A horizon is a mineral horizon, It forms at the surface as topsoil. O horizon turns eventually into topsoil

8 0
3 years ago
Using a molar heat of combustion of hexane (C6H14) –4163 kJ/mol, the mass of hexane required to increase the temperature of 1.76
pshichka [43]

Answer:

7.46 g.

Explanation:

  • Firstly, we need to calculate the amount of heat needed to warm 5.64 kg of water from 21.0°C to 70.0°C using the relation:

<em>Q = m.c.ΔT,</em>

where, Q is the amount of heat absorbed by water (Q = ??? J).

m is the mass of water <u><em>(m: we will determine).</em></u>

c is the specific heat capacity of water (c = 4.186 J/g.°C).

ΔT is the temperature difference (final T - initial T) (ΔT =  70.0 °C - 21.0 °C = 49.0 °C).

  • To determine the mass of 1.76 L of water we can use the relation:

mass = density x volume.

density of water = 1000 g/L & V = 1.76 L.

∴ mass = density x volume = (1000 g/L)(1.76 L) = 1760.0 g.

∵ Q = m.c.ΔT

<em>∴ Q = m.c.ΔT </em>= (1760.0 g)(4.186 J/g.°C)(49.0 °C) = 360483.2 J ≅ 360.4832 kJ.

  • As mentioned in the problem the molar heat of combustion of hexane is - 4163.0 kJ/mol.

<em>Using cross multiplication we can get the no. of moles of hexane that are needed to be burned to release 360.4832 kJ:</em>

Combustion of 1.0 mole of methane releases → - 4163.0 kJ.

Combustion of ??? mole of methane releases → - 360.4832 kJ.

∴ The no. of moles of hexane that are needed to be burned to release 360.4832 kJ = (- 360.4832 kJ)(1.0 mol)/(- 4163.0 kJ) = 0.0866 mol.

  • Now, we can get the mass of hexane that must be burned to warm 1.76 L of water from 21.0°C to 70.0°C:

<em>∴ mass = (no. of moles needed)(molar mass of hexane)</em> = (0.0866 mol)(86.18  g/mol) = <em>7.46 g.</em>

5 0
3 years ago
The concept of empiricism states that all rationally accepted knowledge is determined from experience. Francis bacon was one of
lawyer [7]

the answer is option D "people emphasized obtaining knowledge through scientific experiments" (on plato)

6 0
3 years ago
Help pls!!!!!!!!!!!!!!!!!!!!!!!!!!
zysi [14]
Oxygen
I think
Hope this helps
3 0
3 years ago
Read 2 more answers
I have 26 protons,26 electrons, and 30 neutrons?
Amiraneli [1.4K]

Answer:

Iron (Fe)

Explanation:

# of protons is the atomic number of the element

the element with the atomic number 26 is Iron

with 26 electrons this means it is Iron with no charge

with 30 neutrons this means the atomic weight will be

26 (protons) + 30 (neutrons) = 56

the real atomic weight of iron listed on the periodic table is 55.845, this rounded up is 56.

7 0
3 years ago
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