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maw [93]
3 years ago
11

Chemical bonds

Chemistry
2 answers:
aniked [119]3 years ago
4 0
Chemical bonds hold atoms together to form compounds through the sharing of electrons or the transferring of electrons. 
Bio is not my strongest subject, but I am pretty sure that a pyramid of numbers differs from an ecological pyramid because it displays the number of organisms at each trophic level
Orlov [11]3 years ago
3 0

D. displays the number of organisms at each trophic level.

Hope I was helpful :)

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Plz answer this i will mark brainly like and ratr
matrenka [14]

Answer:

answer what ?

Explanation:

4 0
3 years ago
What is the definition of bond?
JulijaS [17]
Join or be joined securely to something else, typically by means of an adhesive substance, heat, or pressure.
3 0
3 years ago
6 At STP, which element is a good conductor of electricity?(1) chlorine (3) silver
alexgriva [62]
For an object to conduct electricity it should have free or delocalised electrons that are free to pass the charge and hence take part in conducting electricity.
From the given choices
Chlorine is a halogen existing as a diatomic gas. Iodine too is a halogen and 2 Iodine atoms held together by covalent bond. Cl - Cl bonds and I-I bonds are  covalent bonds. the outer electrons of Cl and I take part in covalent bonds therefore they are fixed and not free to move about. therefore no free electrons to conduct electricity.
Sulfur is a solid that too is held together by covalent bonds so it does not have free electrons to conduct electricity.

Silver is a metal and a general property of metals are their ability to conduct electricity.
metal structure are metal ions tightly packed together. when the metal atoms are tightly packed their valence electrons are removed and delocalised. Positively charged metal ions are embedded in a sea of delocalised electrons.
therefore there are delocalised electrons that can conduct electricity 


answer is 3) silver
3 0
3 years ago
Read 2 more answers
Electric current is the flow of particles with ________. a. Negative charge b. Positive charge c. Both positive and negative cha
Lelechka [254]
I believe Positive & Negative
4 0
3 years ago
Read 2 more answers
\The specific heat of aluminum is 0.21 cal g°C . How much heat is released when a 10 gram piece of aluminum foil is taken out of
atroni [7]

<u>Answer: </u>The amount of heat released is 84 calories.

<u>Explanation: </u>

The equation used to calculate the amount of heat released or absorbed, we use the equation:

Q= m\times c\times \Delta T

where,

Q = heat gained  or released = ? Cal

m = mass of the substance = 10g

c = specific heat of aluminium = 0.21 Cal/g ° C

Putting values in above equation, we get:

\Delta T={\text{Change in temperature}}=(10-50)^oC=-40^oC  

Q=10g\times 0.21Cal/g^oC\times-40^oC

Q = -84 Calories

Hence, the amount of heat released is 84 calories.

8 0
3 years ago
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