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3 years ago

A solution is made

Chemistry

2 answers:

Juliette [100K]3 years ago

5 0

Answer: 14.3

Explanation:

Anna11 [10]3 years ago

3 0

Answer:

99.3%

Explanation:

The percent by mass of the solute can be expressed as:

% mass = $\frac{MassSolute}{MassSolute+MassSolvent}$ * 100%

And for this problem:

Mass of Solute = Mass of sodium lithium chloride = 29 g

Mass of Solvent = Mass of Water

So to calculate the percent by mass first we need to calculate the mass of water, to do so we use its density (1 g/L):

202 mL is equal to (202/1000) 0.202 L.

Density water = mass water / volume

1 g/L = mass water / 0.202 L

Mass water = 0.202 g

Now we have all the data required to calculate the % mass:

% mass = $\frac{29g}{29g+0.202g}$ * 100 % = 99.3%

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Missions to mars are feasible only once every two years ?

krek1111 [17]

Answer:

Yes.

Explanation:

If you want to use the least fuel, then missions to Mars are feasible every two years.

You want to launch when Earth and Mars are close together, and this happens about every 26 months.

However, Earth travels faster than Mars, so the spaceship must launch when Mars is 44° ahead of Earth in its orbit.

The ship will then use the most efficient trajectory to arrive at Mars.

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3 years ago

Sodium metal is added to a solution of magnesium chloride. Will a reaction occur? If so, what reaction will take place?

Black_prince [1.1K]

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3 years ago

List out the moles for each element in the following compound ZnBr2

natulia [17]

Answer:

If the colors in a chromatography are able to dissolve and travel up a paper wick, what kind of chemical property do the colors have when mixed with rubbing alcohol?

(You may need to search "Chemical Properties")

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2 years ago

Recall that your hypothesis is that these values are the fraction of atoms that are still radioactive after n half-life cycles.

Savatey [412]

$0.5^{n}$ means 0.5 raise to the power of n. "To the power of" means an action of multiplication of 0.5 to n times.

The different values of n are given in the table. Substituting these values:

For A:

n = 1 (given)

$0.5^{n} = 0.5^{1} = 0.5$

For B:

n = 2 (given)

$0.5^{n} = 0.5^{2} = 0.5\times 0.5 = 0.25$

For C:

n = 3 (given)

$0.5^{n} = 0.5^{3} = 0.5\times 0.5\times 0.5 = 0.125$

For D:

n = 6 (given)

$0.5^{n} = 0.5^{6} = 0.5\times 0.5\times 0.5\times 0.5\times 0.5\times 0.5= 0.015625$

For E:

n = 8 (given)

$0.5^{n} = 0.5^{8} = 0.5\times 0.5\times 0.5\times 0.5\times 0.5\times 0.5\times 0.5\times 0.5= 0.00390625$

Hence, the values are:

A = 0.5

B = 0.25

C = 0.125

D = 0.015625

E = 0.00390625

4 0

3 years ago

Read 2 more answers

In a ground state hydrogen atom in which orbital is the electron

vagabundo [1.1K]

The function is known as the atomic orbital.
The electron is most likely to be found at a distance from the nucleus equal to the Bohr radius.

For Hydrogen,...

an electron in the ground state has the energy of -13.6eV.
This is relative to the ionization threshold.

Hoped this helped ;)

4 0

3 years ago