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emmainna [20.7K]
2 years ago
15

Ions of an element (elements with different charges) contain different numbers of what

Chemistry
1 answer:
Vadim26 [7]2 years ago
7 0

Answer:

an ion is an element that has different numbers of protons and electrons

Explanation:

An ion is positive when it has more protons than electrons and negative when it has more electrons than ions.

(Hope this was helpful!) :)

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What is the velocity of a 0.5-kg ball<br> that has a momentum of 3 kg.m/s?
maria [59]

Answer:

6m/s

Explanation:

Data obtained from the question include:

Mass = 0.5kg

Momentum = 3 kg.m/s

Velocity =.?

Momentum is simply the product of mass and velocity as shown by the equation below:

Momentum = Mass x Velocity

Velocity = Momentum /mass

Velocity = 3kg.m/s / 0.5kg

Velocity = 6m/s

Therefore, the velocity of the ball is 6m/s

3 0
3 years ago
The thickness of a 6.00 cm square piece of Al that has a mass of .842 g and a density of 2.70 g/cm^3
lutik1710 [3]
Volume = Mass / Density
Volume =  .842 / 2.70
Volume = .31185 cubic centimeters
Aluminum square * depth = .31185 cubic centimeters
6 * 6 * depth = .31185 cubic centimeters
depth = (.31185 cubic centimeters) / 36
<span><span><span>depth = 0.0086625514 centimeters

(That must be aluminum foil.)

</span> </span></span>





7 0
3 years ago
30.0 mL of 0.50 M NaOH to neutralize 15.0 mL of HNO3, what is the concentration (molarity) of the HNO3?
vredina [299]
First find the no. of moles of NaOH : 
<span>30/1000 = 0.3 dm3 so no. of moles = 0.3*0.5 = 0.15 moles </span>

<span>as NaOH reacts with HNO3 in a ratio of one to one, there must have been 0.15 moles of HNO3 too </span>
<span>moles/volume = concentration </span>
<span>volume= 15/1000 = 0.15 dm3 </span>

<span>concentration = 1.15/0.15 = 1 mol.dm-3 </span>

<span>The quicker way would be to realize that you used twice as much NaOH so the HNO3 had to be twice as strong</span>
4 0
3 years ago
How many grams are in 9.97 moles of Be(NO3)2?<br> Use two digits past the decimal for all values.
Simora [160]

Answer:

1,869.97 grams of Be(NO3)2

Explanation:

Be(NO3)2 = Be  N2  O6

Be=9.012182g/mole

N2=28.0134g/mole

O6=96g/mole

therefore Be(NO3)2 gives you 187.56g in one mole

so 9.97 moles means there is 9.97 times more

9.97mole Be(NO3)2 * 187.56g Be(NO3)2/1mole Be(NO3)2 = 1,869.97g of Be(NO3)2

4 0
2 years ago
When the ionic compound ki is dissolved in water what attraction pulls i– ions into solution?
weeeeeb [17]
<span>the attraction to the positive end of a water molecule.hope this helps you</span>
4 0
3 years ago
Read 2 more answers
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