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aleksklad [387]
3 years ago
5

Suppose while walking along the beach, you find a green crystal. Which properties could you use to determine whether the crystal

is an emerald?
Chemistry
1 answer:
baherus [9]3 years ago
5 0

Explanation:

Emerald is defined by its green color. To be an emerald, a specimen must have a distinctly green color that falls in the range from bluish green to green to slightly yellowish green. To be an emerald, the specimen must also have a rich color.

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Name 3 elements that are found in the human body
Taya2010 [7]

Answer:

oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.

Explanation:

the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus.

8 0
3 years ago
Read 2 more answers
For many purposes we can treat nitrogen N2 as an ideal gas at temperatures above its boiling point of −196.°C. Suppose the tempe
DIA [1.3K]

Answer:

5.3 atm

Explanation:

We can solve this problem using the equation of state for an ideal gas, which states that:

pV=nRT

where

p is the pressure of the gas

V is its volume

n is the number of moles

R is the gas constant

T is the absolute temperature of the gas

For a gas undergoing a transformation, n and R remain constant, so the equation can be written as

\frac{p_1 V_1}{T_1}=\frac{p_2 V_2}{T_2}

For the gas in this problem we have:

T_1=18.0C+273=291 K is the initial temperature of the gas

T_2=-15.0C + 273=258 K is the final temperature

p_1=3.6 atm is the initial pressure

V_2=0.60V_1, as the volume is decreased by 40.0%

Solving for p_2, we find the final pressure of the gas:

p_2 = \frac{p_1 V_1 T_2}{T_1 V_2}=\frac{(3.6)V_1(258)}{(291)(0.60V_1)}=5.3 atm

6 0
4 years ago
What is the most metallic element in group 14?
maxonik [38]
The most metallic element in group 14 is francium. However, it is a <span>man-made element, except for one isotope, and all isotopes are so radioactive they almost instantly decay into another element.</span>
7 0
3 years ago
Steel cranes can carry heavy steel beams thousands of feet high
Dvinal [7]

Answer:

yes they were made to carry thousands of lb high up

3 0
3 years ago
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salantis [7]
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3 years ago
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