Answer:
C. They are slow learners.
Explanation:
Humans are mammals, and for the most part are pretty fast learners. Hope this helps!
Answer:
For A = 733.2 torr
For B = 740.1 torr
Explanation:
Given data:
For A
Height = 15.4 mm
Pressure of atmosphere = 0.985 atm ( 0.985 ×760 = 748.6 mmHg)
Pressure of gas = ?
For B
Height = 12.3 mm
Pressure of atmosphere = 0.99 atm ( 0.99×760 = 752.4 mmHg)
Pressure of gas = ?
Solution:
For A
P( gas) = P (atmosphere) - 15.4 mmHg
P( gas) = 748.6 mmHg - 15.4 mmHg
P( gas) = 733.2 mmHg or 733.2 torr
For B
P( gas) = P (atmosphere) - 12.3 mmHg
P( gas) = 752.4 mmHg - 12.3 mmHg
P( gas) = 740.1 mmHg
or
740.1 torr
The atomic number tells you how many protons are in an element.
Answer:79
35Br
56
26Fe
197
79Au
Explanation:
In the nuclear symbol of an element, the superscript represents the mass number. The mass number is the sum of the number of protons and the number of neutrons present in the atom. The subscript is the atomic number which is the number of protons present in the atom or the number of electrons in the neutral atom.
Answer:
a. qm = 627.3 J
b. qw = 627.3 J
c. C₂ = 227.4 J/kg.°C
Explanation:
a.
Since, the calorimeter is completely insulated. Therefore,
Heat Lost by Metal = Heat Gained by water
qm = qw
qm = m₁C₁ΔT₁
where,
qm = heat lost by metal = ?
m₁ = mass of water = (density)(volume) = (1000 kg/m³)(100 mL)(10⁻⁶ m³/1 mL)
m₁ = 0.1 kg
C₁ = specific heat capacity of water = 4182 J/kg.°C
ΔT₁ = Change in Temperature of Water = 19.1°C - 17.6°C = 1.5°C
Therefore,
qm = (0.1 kg)(4182 J/kg.°C)(1.5°C)
<u>qm = 627.3 J</u>
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b.
Since,
qm = qw
<u>qw = 627.3 J</u>
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c.
qm = m₂C₂ΔT₂
where,
m₂ = mass of metal = 38.1 g = 0.0381 kg
C₂ = specific heat capacity of metal = ?
ΔT₂ = Change in Temperature of metal = 90°C - 17.6°C = 72.4°C
Therefore,
627.3 J = (0.0381 kg)(C₂)(72.4°C)
(627.3 J)/(0.0381 kg)(72.4°C) = C₂
<u>C₂ = 227.4 J/kg.°C</u>
