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bagirrra123 [75]
3 years ago
8

The density of iron is 7.8 g/cm3 and that of aluminum is 2.7 g/cm3. Using a balance, you find that a block of iron has the same

mass as a block of aluminum. Which block has the LARGER volume?
Question 15 options:

You cannot tell from the information given.


The volumes are the same.


The iron block


The aluminum block
2.) As water in an ice cube tray freezes,

Question 23 options:

it absorbs energy from its surroundings.


its surroundings absorb energy from it.


it absorbs coldness from and releases energy to its surroundings.


it only absorbs the coldness from its surroundings.


it neither absorbs nor releases energy, because its temperature stays constant.
Chemistry
1 answer:
vazorg [7]3 years ago
8 0

Answer:

1.The Aluminum block

2.its surroundings absorb energy from it.

Explanation:

In this question it is important to remember that density of an object is the mass of that object divided by its volume.

The expression applied here is density=mass/volume

Given that the mass is constant,lets say mass= m=1g

and density of aluminum=2.7g/cm³ and that of iron is 7.8 g/cm³ then volume=?

Volume=mass/density

Volume of aluminum= 1/2.7 =0.3704 cm³

Volume of iron = 1/7.8 =0.1282 cm³

Here we see volume of Aluminum block is the largest.

2.As water in an ice cube tray freezes, its surroundings absorb energy from it.When the water freezes, latent heat of freezing is given out to the surrounding.When water is freezing, it stays at a constant temperature of 0°C, the heat energy released ensures that there is no cooling past 0 °C.

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The amount of stored chemical energy is what determines the temperature of a substance.
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Answer:

False

Explanation:

Temperature is also heat energy, so chemical energy has no affect over it.

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Determine the element of lowest atomic number that contains a complete d subshell in the ground state. element symbol:
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The component with the most low atomic number that contains a total d-subshell in the ground state is copper. Copper's electron arrangement is [Ar]3d104s1 [ A r ] 3d 10 4 s 1 .  

Further Explanation:  

atomic number:  

The nuclear number or proton number (image Z) of a synthetic component is the quantity of protons found in the core of a particle. It is indistinguishable from the charge number of the core. The nuclear number particularly distinguishes a compound component. In an uncharged iota, the nuclear number is likewise equivalent to the quantity of electrons.  

The elemenents of the intermittent table arranged by atomic mass:  

atomic Mass    Name substance element          Number  

1.0079                          Hydrogen                            1  

4.0026                            Helium                                    2  

6.941                           Lithium                                    3  

9.0122                           Beryllium                                    4  

atomic number speak to:  

The nuclear number (otherwise called the proton number) is the quantity of protons found in the core of an iota. It is customarily spoken to by the image Z. The nuclear number exceptionally distinguishes a substance component. In a particle of impartial charge nuclear number is equivalent to the quantity of electrons.  

Meaning of subshell:  

A subshell is a subdivision of electron shells isolated by electron orbitals. Subshells are marked s, p, d, and f in an electron design.

Subject: chemistry  

Level: High School

Keywords: atomic number, The elemenents of the intermittent table arranged by atomic mass, atomic number speak to, Meaning of subshell.  

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Explanation:

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