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drek231 [11]
3 years ago
10

Initially 10.0 mL of water was placed in a graduate cylinder and then a solid metal was immersed in the water in the graduated c

ylinder. At this point, the volume of water was read as 15.5 mL. If the mass of the solid is 9.25 g, what is the density?
Chemistry
1 answer:
Ahat [919]3 years ago
7 0

Answer: 1682 kg/m^3

Explanation:

the formula for density is mass/volume

to get the volume of the metal = Final Volume - Initial Volume

= 15.5 - 10.0 = 5.5mL

density of the metal = 9.25g/5.5mL = 1.682g/mL

to convert from g/mL to kg/m^3, multiply by 1000

density of metal = 1682 kg/m^3

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How many moles of copper are present in a sample that contains 4.55 x 10^24 atoms of copper
FinnZ [79.3K]

Hope you could understand.

If you have any query, feel free to ask.

3 0
2 years ago
Two objects are brought into contact Object 1 has mass 0.76 kg, specific heat capacity 0.87) g'c and initial temperature 52.2 'C
taurus [48]

Answer:

T_F=77.4\°C

Explanation:

Hello there!

In this case, according to the given information, it turns out possible to set up the following energy equation for both objects 1 and 2:

Q_1=-Q_2

In terms of mass, specific heat and temperature change is:

m_1C_1(T_F-T_1)=-m_2C_2(T_F-T_2)

Now, solve for the final temperature, as follows:

T_F=\frac{m_1C_1T_1+m_2C_2T_2}{m_1C_1+m_2C_2}

Then, plug in the masses, specific heat and temperatures to obtain:

T_F=\frac{760g*0.87\frac{J}{g\°C} *52.2\°C+70.7g*3.071\frac{J}{g\°C}*154\°C}{760g*0.87\frac{J}{g\°C} +70.7g*3.071\frac{J}{g\°C}} \\\\T_F=77.4\°C

Yet, the values do not seem to have been given correctly in the problem, so it'll be convenient for you to recheck them.

Regards!

4 0
3 years ago
9. When you move your hand from a hot stove what is the stimulus you are reacting to?
Gemiola [76]

Answer:

if you touch a hot stove, the nerves in your skin shoot a message of pain to your brain. The brain then sends a message back telling the muscles in your hand to pull away.

Explanation:

4 0
2 years ago
How many moles of mercury (II) oxide are needed to produce 65.00 g of mercury?
natima [27]

Answer:

the moles of mercury are nHg = 65/201

HgO --------> Hg + 1/2O2

65/201 65/201

=> the moles of HgO are 65/201 mol

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If high tide occurs at 6:00 am, when will the next high tide occur?
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High tides occur 12 hours and 2 minutes apart do it would be at 6:25 pm
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3 years ago
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