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frutty [35]
3 years ago
6

When the metal was placed in the calorimeter, its temperature dropped to the equilibrium temperature. Calculate the change in te

mperature of each metal sample. Record these values in Table B of your Student Guide. What is the change in temperature for the aluminum wire? C What is the change in temperature for the steel wire? C What is the change in temperature for the lead pellets? C
Chemistry
2 answers:
Murljashka [212]3 years ago
6 0

Answer:

1st one= -79.6

2nd one= -80

3rd one= -81.2

Explanation:

MAVERICK [17]3 years ago
5 0

Answer:

1st one= -79.6

2nd one= -80

3rd one= -81.2

Explanation:

Good luck!

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Match the number of neutrons to the correct isotope by studying the atomic number and mass number of each isotope. Drag the item
fenix001 [56]

these are the correct answers

5 0
3 years ago
What is a physical change
Shtirlitz [24]

Answer:

A physical change is a change that does not change the chemical properties of the substance and is purely physical.

Explanation:

The appearance of the object of chemical may change but its chemical properties are the same.

For example:

  • Ice melting
  • Water boiling
  • Dissolving salt in water
  • Cutting paper
4 0
3 years ago
A sealed container of nitrogen gas is at 1000.0 kPa pressure and at a temperature of 20.00 °C. The container is left in the sun,
vodka [1.7K]

Answer:

P₂ = 1102 Kpa

Explanation:

Given data:

Initial pressure = 1000.0 Kpa

Initial temperature = 20.0°C

Final temperature = 50.0°C

Final pressure = ?

Solution:

Initial temperature = 20.0°C (20+273 = 293 K)

Final temperature = 50.0°C (50+273 = 323 K)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

1000 Kpa / 293 K = P₂/323 K

P₂ = 1000 Kpa × 323 K / 293 K

P₂ = 323000 Kpa. K /293 K

P₂ = 1102 Kpa

7 0
3 years ago
What volume (mL) of a concentrated solution of sodium hydroxide (6.00 M) must be diluted to 187 mL to make a 1.53 M solution of
Len [333]

Answer:

47.68 mL

Explanation:

In this case, we have a <u>dilution problem.</u> So, we have to start with the dilution equation:

C_1*V_1=C_2*V_2

We have to remember that in a dilution procedure we go from a <u>higher concentration to a lower one</u>. With this in mind, We have to identify the <u>concentration values</u>:

C_1~=~6.00~M

C_2~=~1.53~M

The higher concentration is C1 and the lower concentration is C2. Now, we can identify the <u>volume values</u>:

V_1~=~X

V_2~=~187~mL

The V2 value has <u>"mL"</u> units, so V1 would have <u>"mL"</u> units also. Now, we can include all the values into the equation and <u>solve for "V1"</u>, so:

6.00~M*V_1=1.53~M*187~mL

V_1=\frac{1.53~M*187~mL}{6.00~M}=47.68~mL

So, we have to take 47.68 mL of the 6 M and add 139.31 mL of water (187-47.68) to obtain a solution with a final concentration of 1.53 M.

I hope it helps!

6 0
3 years ago
Ammonia gas and oxygen gas react to form water vapor and nitrogen monoxide gas. What volume of water would be produced by this r
NikAS [45]

Answer:

Water volume produced is 7.3 mL

Explanation:

This the reaction:

4NH₃ (g) + 5O₂ (g) →  4NO (g) + 6H₂O (g)

We have to work with density, to solve this question

Density of ammonia = Ammonia mass / Ammonia volume

0,00073 g/mL = Ammonia mass / 6300 mL

(Notice, we had to convert 6.3L to mL)

0.00073 g/mL . 6300 mL = Ammonia mass → 4.599 g

Mass / Molar mass = Mol

4.599 g / 17g/m = 0.270 mole

Ratio is 4:6

4 mole of ammonia produce 6 mole of water

0.270 mole produce (0.270  .6)/4 = 0.405 mol

Molar mass . mole = mass

18 g/m . 0.405 m = 7.30 g

Water density = 1 g/mL

Water density = Water mass / Water Volume

1g/mL = 7.30 g / Water volume

Water volume = 7.3 mL

5 0
3 years ago
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