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Gwar [14]
3 years ago
5

What are the energy transformations that occur in a cellphone that is plugged in? Is it an open or a closed system?​

Chemistry
1 answer:
Fiesta28 [93]3 years ago
8 0
Ummm I think but not possible
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If there is a loss of 5.63 x 10-7kg of mass in a nuclear reaction, how many Joules of energy would be released? Recall that c =
melamori03 [73]
E = m c^2   

E is energy in joule, m is mass in Kg and c ....speed of light (as you mention)

Substituting your values in the equation

E =  ( 5.63 x 10-7kg ) (3*10?^8) ^2 = 5.067 *10 ^10 J  

5 0
3 years ago
What does the kinetic theory state?
LUCKY_DIMON [66]

Answer:

Explanation:

Kinetic molecular theory of gasses stated that,

1) Gases consist of large number of smaller particles which are distance apart from each others.

2) The gas molecules collide with each other and also with wall of container and this collision is elastic.

3) Gas molecules are in continuous random motion and posses kinetic energy.

4) The forces of attraction between gas molecules are very small and considered negligible.

5) The temperature of gas is directly proportional to average kinetic energy of gas molecules.

8 0
3 years ago
WILL GIVE MOST BRAINLY ( PLEASE HURRY )
sergiy2304 [10]

Answer:

Temperature

Explanation:

6 0
3 years ago
Read 2 more answers
Consider the interaction of two hydrogen ls atomic orbitals of the same phase. Which statements below is an incorrest descriptio
Andreyy89

Answer:

B) The molecular orbital formed is lower in energy than a hydrogen 1s atomic orbital.

Explanation:

When two atoms of hydrogen come close to each other , there is formation of molecular orbital . Due to overlap of 1 s orbital of one and 1 s orbital of another atom , two molecular orbitals are formed . One of these molecular orbital has energy less than 1 s atomic orbital . It is called 1 s sigma bonding molecular orbital . The other molecular orbital has energy more than 1 s atomic orbital . It is called antibonding molecular orbital . Two electrons occupy bonding sigma molecular orbital .

So , the statement that "the molecular orbital formed is lower in energy than a hydrogen 1s atomic orbital " is wrong .

4 0
3 years ago
How many moles of hcl are required to neutralize aqueous solutions of these bases:
Lemur [1.5K]
The answers are a.) 0.03 mol KOH requires 0.03 mol HCl, b.) 2 mol NH3 requires 2 mol HCl and c.) 0.1 mol Ca(OH)2 requires 0.2 mol HCl.
Solution:
We need to write the balanced equations for each reactions to find out the stoichiometry for each reactants. 
a.) HCl (aq) + KOH (aq) → KCl (aq) + H2O(ℓ)
From the balanced equations, we can see that 1 HCl reacts with 1 KOH, therefore if 0.03 mol KOH is reacted then 0.03 mol HCl must also be present. 

b.) HCl(aq) + NH3(aq) ) → NH4Cl(aq)
If 2 moles of NH3 are reacted then 2 moles of HCl must also be present since 1 HCl reacts with 1 NH3 from the balanced reaction.

c.) 2HCl(aq) + Ca(OH)2(s) → CaCl2(aq) + 2H2O(ℓ)
We can see that 2 HCl react with 1 Ca(OH)2, hence if 0.1 mol of Ca(OH)2 is reacted then 0.2 mol HCl must also be present.
8 0
3 years ago
Read 2 more answers
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