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klemol [59]
3 years ago
12

The mass of 25 cm 3 of brass is 210 g calculate the density of brass​

Chemistry
2 answers:
Leona [35]3 years ago
7 0

Answer:

<h3>The answer is 8.4 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question we have

density =  \frac{210}{25}  =  \frac{42}{5}  \\

We have the final answer as

<h3>8.4 g/cm³</h3>

Hope this helps you

Svetach [21]3 years ago
6 0

Answer:

Explanation:

The answer is 8.4 g/cm³

Explanation:

The density of a substance can be found by using the formula

From the question we have

We have the final answer as

8.4 g/cm³

Hope this helps you

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When n = 4, l = 2, and ml = -1, to what orbital type does this refer?
Leya [2.2K]

will tell you the subshell type, so you are dealing with a d orbital.  

ml will tell you the orientation of the orbital, there is no distinction between the orbitals so -1 doesnt specifically mean anything.

5 0
3 years ago
One piece of copper jewelry at 101°C has twice the mass of another piece, which is at 38.0°C. Both pieces are placed inside a ca
nydimaria [60]

Answer:

80.0°C will be the final temperature inside the calorimeter.

Explanation:

Heat lost by  the pace of jewelry  will be equal to heat gained by the another piece of the jewelry

-Q_1=Q_2

Mass of piece-1= m_1=2m

Specific heat capacity of copper= c  = 0.387 J/g.K

Initial temperature of the iron = T_1=101^oC

Final temperature = T_2=T

Q_1=m_1c_1\times (T-T_1)

Mass of piece-2= m_2=m

Specific heat capacity of copper = c  = 0.387 J/g.K

Initial temperature of the water = T_3=38.0^oC

Final temperature of water = T_2=T

Q_2=m_2c_2\times (T-T_3)

-Q_1=Q_2  (conservation of energy)

-(m_1c_1\times (T-T_1))=m_2c_2\times (T-T_3)

On substituting all values:

-(2mc\times (T-101^oC))=mc\times (T-38.0^oC)

T= 80.0^oC

80.0°C will be the final temperature inside the calorimeter.

8 0
4 years ago
What is the molarity of a solution of hf if 4.400 moles of hf are added to a container and filled with water to a final volume o
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Answer is: the molarity of a solution of HF is 0.73 M.

n(HF) = 4.400 mol; amount of hydrofluoric acid.

V(HF) = 6.00 l; volume of hydrofluoric acid.

c(HF) = n(HF) ÷ V(HF).

c(HF) = 4.400 mol ÷ 6.00 l.

c(HF) = 0.733 mol/l; molarity of a solution (hydrofluoric acid).

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How can endangered species be saved ?
labwork [276]

Answer:

There are lots of methods.

Explanation:

Usually, animals like pandas live a shorter lifespan in the wild than in captivity. A little fact, there is only one brown panda in the entire world, so it would be very, very rare to see one. The Smithsonian National Zoo, for example, are working to protect pandas, as well as other species.

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