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irina1246 [14]
3 years ago
10

What does halogen mean?

Chemistry
1 answer:
Mademuasel [1]3 years ago
6 0
A Halogen is a group (or a column) on the periodic table. It contains fluorine, chlorine, bromine, and astatine!
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What would be the new volume of a gas if 455 of that gas is cooled from 30.0°C to -80.0°C?
Lapatulllka [165]

Answer:

44555

Explanation:

is the answer

5 0
3 years ago
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A 360. g iron rod is placed into 750.0 g of water at 22.5°C. The water temperature rises to 46.7°C. What was the initial tempera
Grace [21]

Answer: The initial temperature of the iron was 515^0C

Explanation:

heat_{absorbed}=heat_{released}

As we know that,  

Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})

m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]         .................(1)

where,

q = heat absorbed or released

m_1 = mass of iron = 360 g

m_2 = mass of water = 750 g

T_{final} = final temperature = 46.7^0C

T_1 = temperature of iron = ?

T_2 = temperature of water = 22.5^oC

c_1 = specific heat of iron = 0.450J/g^0C

c_2 = specific heat of water= 4.184J/g^0C

Now put all the given values in equation (1), we get

-360\times 0.450\times (46.7-x)=[750\times 4.184\times (46.7-22.5)]

T_i=515^0C

Therefore, the initial temperature of the iron was 515^0C

4 0
3 years ago
In the example, the final kinetic energy is determined to be ___________ because at the peak height, the ball instantaneously st
alina1380 [7]

TLDR: The kinetic energy is determined to be zero.

Kinetic energy is energy of motion; when an object is moving (i.e. it has speed or velocity), it has some amount of kinetic energy. The equation itself looks like so:

KE=1/2(m)(v)^2,

where "m" represents the mass of the object and "v" represents the objects speed or velocity. In this example, the ball has stopped, meaning it has no speed/velocity. This means that the final kinetic energy is determined to be zero or none, due to the lack of motion. Mathematically, you can see this by substituting "0" in for "v" (the ball is stopped):

KE=1/2(m)(v)^2

KE=1/2(m)(0)^2

KE=1/2(m)*0

KE=1/2*0

KE=0 J,

or zero kinetic energy.

Hope this helps! :)

7 0
3 years ago
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Imprinting can be described as an example of a
yan [13]

Answer:

We deduce that the correct option is option c: critical period

Explanation:

Hello!

Let's solve this!

The imprint is the learning that occurs in early ages, the example of the duckling is used, which follows anyone in early periods.

This is called the critical period.

We deduce that the correct option is option c: critical period

5 0
3 years ago
When sodium atoms (Na) and chlorine atoms (CT) join to make sodium chloride, or table salt, they form an ionic bond, Using this
jasenka [17]

Answer:

D I'm pretty sure.

Explanation:

I'm taking the quiz right now and D makes the most sense.

3 0
3 years ago
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