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My name is Ann [436]
3 years ago
14

Based on the molar masses. how can you tell that an equation is balanced

Chemistry
1 answer:
harkovskaia [24]3 years ago
3 0
You can tell if each side of the equation has the same molar mass.
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Hello, Flashligh explain where the energy comes from and how it is affecting change or putting an object in motion
dangina [55]

Answer:

Our energy supply comes mainly from fossil fuels, with nuclear power and renewable sources rounding out the mix.

The energy associated with an object's motion is called kinetic energy. Kinetic energy is the energy of motion. All moving objects have kinetic energy

Explanation:

7 0
3 years ago
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naturally occurring bromine molecules, br2 have masses of 158, 160, and 162. they occur in the relative abundances 25.69%, 49.99
4vir4ik [10]
The average atomic mass of an element can be determined by multiplying the individual masses of the isotopes with their respective relative abundances, and adding them. 

Average atomic mass of Br = 158 amu(0.2569) + 160 amu(0.4999) + 162 amu(0.2431)
Average atomic mass = 159.96 amu

As described in the problem, the relative abundance for Br-79 is 25.69%. This is because 2 atoms of Br is equal to 79*2 = 158 amu. Similarly, the relative abundance of Br-81 is 81*2 = 162, which is 24.31%.
4 0
3 years ago
Select the statements that correctly describe a buffer. a) An acid added to the buffer solution reacts with the weak base of the
Tom [10]

Answer:

  • <em>(B.) The pH of a buffer solution is determined by the ratio of the concentration of conjugate base to the concentration of strong acid.</em>
  • <em>(C.) A buffer is generally made up of a weak acid and its conjugate base. </em>
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Explanation:

A buffer is  solution which resists change in pH upon addition of either acids or bases.

The pH of a buffer is calculated by the ratio of the concentration  of base to concentration of acid. The weak acid and conjugate base have a Ka similar to the pH desired.

3 0
3 years ago
How many Chorine atoms should bond with one Aluminum atom?
White raven [17]

Answer:

three chlorine atoms

Explanation:

8 0
2 years ago
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matrenka [14]
Nitrogen is 5 valence electrons
oxygen is 6 valence electrons
fluorine is 7 electrons
6 0
3 years ago
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