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3 years ago

Which atomic property is different in each isotope of an element?

1 answer:

6 0

Every isotope of an element has a different number of neutrons, which means that the atomic property which is different in each isotope of an element is mass number.
Mass number depends on the number of neutrons in an element.

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Will, a sprinter on the track team, has an inelastic demand for a sports drinks. The local store has raised the price of a sport

Keith_Richards [23]

He bought 10 bottles a month at $1.00 and 8 bottles a month at $1.50.

7 0

3 years ago

What is the concentration of a stock solution if 20 mL was used to make 400 mL of a 1.44

timofeeve [1]

Given :

Volume of stock solution, $V_s = 20\ mL$ .

Volume of diluted solution, $V_d = 400 \ mL$ .

Molarity of diluted solution, $M_d = 1.44\ M$ .

To Find :

The concentration of the stock solution.

Solution :

We know, dilution factor is given by :

$D.F=\dfrac{V_ {diluted}}{V_{stock}}$ ....1)

and $D.F= \dfrac{M_{stock}}{M_{diluted}}$ ....2)

Putting volume in above equation, we get :

D.F = 400/20

D.F = 20

Putting value of D.F in equation 2) we get :

$\dfrac{M_{stock}}{M_{diluted}} = 20\\\\M_{stock} = 20\times 1.44\\\\M_{stock} =28.8\ M$

The concentration of stock solution is nearest to 30 M.

Therefore, the correct option is 1) 30 M.

4 0

3 years ago

How many mL of a 4% mass/volume Mg(NO3)2 solution would contain 1.2 grams of magnesium nitrate?

Phoenix [80]

4% mass / volume :

4 g ---------> 100 mL
1.2 g ------- ? mL

V = 1.2 * 100 / 4

V = 120 / 4

V = 30 mL

hope this helps!

7 0

3 years ago

A jeweler guarantees that a piece of jewelry is at least 95% gold, by mass. You consider buying a piece of gold jewelry that wei

ELEN [110]

The density of the sample is:
Density = mass / volume
Density = 9.85 / 0.675
Density = 14.6 g/cm³

If the sample has 95% gold, and 5% silver, its density should be:
0.95 x 19.3 + 0.05 x 10.5
Theoretical density = 18.9 g/cm³

The difference in theoretical and actual densities is very large, making it likely that the jeweler was not telling the truth.

8 0

4 years ago

How many atoms are in 3.89 moles of Cu?

AleksandrR [38]

Answer:

2.34×10^24

Explanation:

N=n×Na

N=3.89×(6.02×10^23)

N=2.34×+0^24 atoms of Cu

3 0

4 years ago