Chemistry, 22.05.2021 07:00 hit89

Question 26 (3 points) In the lab, a cube of wood has a mass of 41.2 grams and its temperature rises from
28.1°C to 65.1°C when placed outside in the sun for a period of time. Calculate the
amount of heat absorbed by the wood. The specific heat of wood is 1.76 J/g°C.
6
Round your answer to 1 decimal place.
Your
1
Answer
units
D Add attachments to support your work
Question 27 (3 points)

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Answer from: oliviaberta91

2682.9J is the heat absorbed by the wood

Explanation:

To find the heat absorbed for a material we must use the equation:

Q = S*m*ΔT

Where Q is heat absorbed in Joules

S is specific heat of the material = 1.76J/g°C for wood

m is the mass of the material = 41.2g

ΔT is change in temperature = 65.1°C - 28.1°C = 37.0°C

Replacing:

Q = 1.76J/g°C*41.2g*37.0°C

Q = 2682.9J is the heat absorbed by the wood

Answer from: Quest

The gas would begin to expand, and eventually the can would burst or explode.

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

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Question 26 (3 points) In the lab, a cube of wood has a mass of 41.2 grams and its temperature rise...

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