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Gala2k [10]
3 years ago
15

Elements found in the same period on the periodic table have the same...

Chemistry
2 answers:
Serggg [28]3 years ago
8 0
Number of Energy Levels
White raven [17]3 years ago
6 0

Answer:

valence electrons

Explanation:

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A block of ice sitting at 0 °C is completely melted by adding 584.5 J of heat to it. If the latent heat of fusion for ice is 334
Likurg_2 [28]

Answer:

mass of ice is 1.75

Explanation:

Using, the formula given in the question,

m = Q/HΔf.................. Equation 1

Where Q = Heat, m = mass of ice, HΔf = Latent heat of fussion of for ice.

From the question,

Given: Q = 584.5 J, HΔf = 334 J/g

Substitute these values into equation 2

m = 584.5/334

m = 1.75 kg.

Hence the mass of ice without unit is 1.75

7 0
3 years ago
Ar
Vikki [24]

Answer: ar

Explanation:

4 0
3 years ago
If molten sodium chloride is split by electrolysis, which reaction occurs at the anode?
mariarad [96]

Answer: 2Cl^-(l)\rightarrow 2e^-+Cl_2(g)

Explanation:

Electrolysis of a subastance is breaking it into its constituents by the action of electrical current.  

In the electrolysis of molten sodium chloride, sodium metal is produced at the cathode which is a negative electrode and chlorine gas produces as the anode which is a positive electrode.

2NaCl(l)\rightarrow 2Na^++2Cl^-

At anode : 2Cl^-(l)\rightarrow 2e^-+Cl_2(g)

At cathode : 2Na^+(l)+2e^-\rightarrow 2Na(l)

7 0
3 years ago
Read 2 more answers
Pollution comes from<br> many small sources.
Akimi4 [234]

Answer:

Nonpoint-source-pollution

Explanation:

7 0
3 years ago
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A sample of tin (Cp = 0. 227 J/g•°C) is placed in a freezer. Its temperature decreases from 15. 0°C to â’10. 0°C as it rele
pshichka [43]

Taking into account the definition of calorimetry, the mass of the sample is 478.41 grams.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

  • Q= -543 J because the energy is releases
  • c= 0.227 \frac{J}{gC}
  • m= ?
  • ΔT= Tfinal - Tinitial= 10 C - 15 C= -5 C

Replacing:

-543 J= 0.227 \frac{J}{gC}× m× (-5 C)

Solving:

m=\frac{-543 J}{0.227 \frac{J}{gC}x(-5 C)}

<u><em>m=478.41 grams</em></u>

In summary, the mass of the sample is 478.41 grams.

Learn more about calorimetry:

  • <u>brainly.com/question/11586486?referrer=searchResults </u>
  • <u>brainly.com/question/24724338?referrer=searchResults</u>
4 0
3 years ago
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