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Nataly [62]
3 years ago
6

I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST

Chemistry
1 answer:
snow_tiger [21]3 years ago
5 0

Answer:

I think it's B

Explanation:

I might be wrong, but please tell me.

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Why is an element's atomic mass not listed as a whole number on the periodic table?
BARSIC [14]

Answer: it represents an average mass of all isotopes

Explanation:

i just took the test

5 0
3 years ago
An insulated piston-cylinder device contains 1 L of saturated liquid water at pressure of 150 kPa. An electric resistance heater
miskamm [114]

Answer:

Explanation:

In this problem,

we will determine the enthalpy at the end of heat input and we get the condition is the super heated state.

so the entropy change will be due to latent heat at 150 kPa and also due to temperature change at the super heated state.

All the temperature, enthalpy is evaluated with the help of the steam table.

mass is calculated with the help of a specific volume at initial condition.

<u>see image below</u>

3 0
3 years ago
How many copper atoms are in 150 g of copper metal
GaryK [48]
1. From grams -> mole:

=grams given x 1 mol/molar mass

So 150 g Cu x 1 mol Cu/63.546 g Cu = 2.4 mol Cu

2. From mole -> atoms

=number of mol x 6.022x10^22 atoms/1 mol

So 2.4 mol Cu x 6.022x10^22 atoms Cu/1 mol Cu = 1.4 x 10^24 atoms Cu
5 0
3 years ago
How will the vapor pressure of an aqueous solution of sodium chloride compare to that of pure water?
Eduardwww [97]
The solutions vapor pressure would be lower.
5 0
3 years ago
Read 2 more answers
What quantity of heat is required to raise the temperature of 460g of aluminum from 15C to 85C?
Hoochie [10]

Answer:

Q = 28.9 kJ

Explanation:

Given that,

Mass of Aluminium, m = 460 g

Initial temperature, T_i=15^{\circ} C

Final temperature, T_f=85^{\circ}

We know that the specific heat of Aluminium is 0.9 J/g°C. The heat required to raise the temperature is given by :

Q=mc\Delta T\\\\Q=mc(T_f-T_i)\\\\Q=460\ g\times 0.9\ J/g^{\circ} C\times (85-15)^{\circ} C\\\\Q=28980\ J\\\\\text{or}\\\\Q=28.9\ kJ

So, 28.9 kJ of heat is required to raise the temperature.

6 0
3 years ago
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