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mylen [45]
2 years ago
5

How do you calculate metal density?

Chemistry
1 answer:
nekit [7.7K]2 years ago
7 0

Answer:

You can divide the mass by the volume to calculate the density of the metal

Explanation:

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What are some of the body external defenses
tekilochka [14]
<span>these include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.</span>
4 0
3 years ago
A race car is driven by a professional driver at 99 . What is this speed in and ? 1 mile = 1.61 kilometers 1 hour = 60 minutes E
slavikrds [6]

Answer: The speed is equivalent to <u>159.39 kilometers per hour </u>or <u>2.65 kilometers per minute.</u>

Explanation:

Given, The speed of a race car = 99 miles/ hour

To convert the speed into  kilometers per hour and kilometers per minute

Since   1 mile = 1.61 kilometers

So, Speed of car = (99 ) x (1.61 )

= 159.39 kilometers per hour.

Also, 1 hour = 60 minutes

Then, Speed of car = (159.39) ÷60

= 2.6565≈2.65 kilometer per minute.

Hence, the speed is equivalent to <u>159.39 kilometers per hour </u>or <u>2.65 kilometers per minute.</u>

4 0
3 years ago
Define an ideal gas and explain under which conditions you may reasonably approximate a real gas as an ideal gas. Also mention c
TEA [102]

Answer:

High temperature and low pressure

Explanation:

According to the kinetic molecular theory, gases are composed of small particles called molecules which are in constant motion.

At high temperature and low pressure, gas molecules possess high kinetic energy and move at high velocities hence intermolecular interaction is almost none existent and real gases approach the behavior of ideal gases.

5 0
2 years ago
In what ways are solid solid mixture categorised​
AlladinOne [14]

Mixtures can be classified as homogeneous or heterogeneous . Mixtures are composed of substances that are not chemically combined.

Homogeneous mixtures are solutions. The components of a solution are evenly distributed throughout, so that every part of the solution is the same. The components that make up a solution include one or more solutes dissolved in a solvent. Solutes can be solids, liquids, or gases, and solvents can also be solids, liquids or gases.

Brass is an example of a solid/solid solution, saline solution is an example of a solid/liquid solution, diluted ethanol is an example of a liquid/liquid solution. There are many examples of solutions. The components of a solution can be separated by physical means, such as distillation, evaporation, and chromatography, among others.

7 0
3 years ago
What mass of H₂O is formed when excess H₂ reacts with 64 g of O₂
taurus [48]

Answer: 72 g of H_2O is formed.

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} O_2=\frac{64}{32}=2moles

2H_2+O_2(g)\rightarrow 2H_2O

As  H_2 is the excess reagent, O_2 is the limiting reagent as it limits the formation of product.

According to stoichiometry :

1 mole of O_2 produce=  2 moles of H_2O

Thus 2 moles of O_2 will require=\frac{2}{1}\times 2=4moles  of H_2O

Mass of H_2O=moles\times {\text {Molar mass}}=4moles\times 18g/mol=72g

Thus 72 g of H_2O is formed.

4 0
2 years ago
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