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3 years ago

Which solution would have the lowest freezing point?

Chemistry

1 answer:

KIM [24]3 years ago

8 0

Answer:

a) espero te aya ayudado

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Which one of the following ions would be negatively charged with a charge of -2?

stiv31 [10]

Answer:

10 electrons 8 protons

Explanation:

p +8 - e10- equals -2

7 0

3 years ago

Bromine has two isotopes 79Br and 81Br, whose masses (78.9183 and 80.9163 amu) and abundances (50.69% and 49.31%, respectively)

Reika [66]

Answer:

Average atomic mass = 79.9034 amu

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$

Given that:

For first isotope:

% = 50.69 %

Mass = 78.9183 amu

For second isotope:

% = 49.31 %

Mass = 80.9163 amu

Thus,

$Average\ atomic\ mass=\frac{50.69}{100}\times {78.9183}+\frac{49.31}{100}\times {80.9163}\ amu$

$Average\ atomic\ mass=40.0036+39.8998\ amu$

Average atomic mass = 79.9034 amu

4 0

3 years ago

The major reason for chemical bonding is _____.. . . for atoms to gain the stability of the octet. to form a substance in low su

Otrada [13]

In my opinion, the best answer among the choices listed above is the first option. The major reason for chemical bonding is for atoms to gain the stability of the octet. In general, chemical reactions happen in order for substances achieve stability or appropriately achieve equilibrium.

7 0

3 years ago

Which of the following is true about natural selection?

xxTIMURxx [149]

Answer:

natural selection does not cause a species to change

Explanation:

I believe that's what it is

8 0

3 years ago

Read 2 more answers

A sample of metal has a mass of 24.64 g, and a volume of 5.91 mL. What is the density of this metal?

dlinn [17]

Answer:

$\boxed {\boxed {\sf 4.17 \ g/mL}}$

Explanation:

We are asked to find the density of a metal. Density is the mass per unit volume. It is calculated by dividing the mass by the volume.

$\rho= \frac{m}{v}$

The mass of the metal sample is 24.64 grams and the volume is 5.91 milliliters. We can substitute these values into the formula.

m= 24.64 g
v= 5.91 mL

$\rho=\frac{24.64 \ g }{5.81 \ mL}$

Divide.

$\rho= 4.169204738 \ g/mL$

The mass measurement has 4 significant figures the volume measurement has 3 significant figures. Our answer for density must match the least number of significant figures, which is 3.

For the number we calculated, that is the hundredth place. The 9 in the thousandth place tells us to round the 6 up to a 7.

$\rho \approx 4.17 \ g/mL$

The density of this metal is approximately 4.17 grams per milliliter.

3 0

3 years ago