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mr Goodwill [35]
3 years ago
5

What is the correct formula of Nitic acid​

Chemistry
1 answer:
Helga [31]3 years ago
7 0

the formula for nitric acid is HNO3

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A graduated cylinder is filled with 60.0 ml of water. A cube, made of aluminum, is carefully dropped into the cylinder. Aluminum
katen-ka-za [31]

Answer:

65 ml

Explanation:

The aluminum will not float , so it will displace a volume of fluid equal to its volume.

 13.5 gm / 2.7 gm/ml = 5 ml

the new graduated cylinder measurement will be 60 + 5 = 65 ml

3 0
2 years ago
A 15.0 gram unknown piece of metal at 99°C is added to 75 grams of water at 23°C. The final temperature of the metal and water i
Nina [5.8K]

By law of conservation of energy, the amount of heat lost by the metal should be equal to the amount of heat gained by water. That is, the change in energy (expressed in enthalpies) should be equal:

- (ΔH)metal = (ΔH)water

Take note of the negative sign in front of (ΔH)metal, this means that heat is lost by this metal.

Where ΔH or change in enthalpy is:

ΔH = m Cp (T2 – T1)

 

So,

- 15 g (Cp) (23 °C – 99 °C) = 75 g (4.18 J/g * °C) (26 °C – 23 °C)

1,140 Cp = 940.5

<span>Cp = 0.825 J/g * °C           (ANSWER)</span>

6 0
3 years ago
A chemist is studying the properties of a gas under various conditions. He observes that when the gas is at room temperature and
snow_lady [41]

Answer:

An ideal gas is a theoretical concept and a real gas behaves in an ideal manner under conditions which includes a high temperature and a low pressure such that the gas has high kinetic energy, and the intermolecular forces between the molecules are weak

The Ideal Gas Law is P·V = n·R·T

Where;

P = The pressure of the gas

V = The volume of the gas

n = The number of moles of the gas

R = The Universal Gas Constant

T = The temperature of the gas

For a gas cooled to 10 Kelvin and placed under high pressure, the interaction between individual gas molecules increases, and the kinetic energy of the gases is much lower and more comparable to the inter molecular forces between the gas molecules, which in turn produces observable changes from the initial ideal behavior of the gas such that the gas behavior deviates from the Ideal Gas Laws appreciably and are better modelled by the Van der Waals Equations which takes into account, the volume the gas particles occupy and the intermolecular forces between the molecules

The Van der Waals equation is presented as follows;

P = \dfrac{R \cdot T}{V - b} - \dfrac{a}{V^2}

Where;

V = The molar volume

a = The gas constant a represents the attractive forces between the gas particles

b = Represent the volume occupied by the particles of the gas

Explanation:

8 0
3 years ago
Read 2 more answers
Which compound contains both ionic and covalent bonds? 1) potassium chloride 2) potassium hydride 3) potassium nitrate 4) potass
Lunna [17]

Answer:

Potassium nitrate

Explanation:

Because NO3 (nitrate) consists of 4 covalently bonds atom. NO3, incorporate of nitrate which share electrons then Ionic bonding occurred between K(as cation) NO3(as anion).

7 0
4 years ago
Read 2 more answers
Explain how scientists learned about the magnetic poles of the Earth.
Oxana [17]

Answer:

ocean basalts

Explanation:

As the sea floor slowly spreads, the igneous rock(ocean basalts) of which it is comprised cools and congeals, recording the earth's current magnetic pole alignment.

5 0
3 years ago
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