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nevsk [136]
3 years ago
8

Which part of a chemical formula indicates the number of copies of molecules or compounds?

Chemistry
1 answer:
murzikaleks [220]3 years ago
5 0
That would be the super script, which is the number that appears in front of the molecules composition. 
Ex. 3H2O: The 3 is the super script, and shows that there is 3 water molecules
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True or False;<br> aa is faster moving lava than pahoehoe?
frosja888 [35]

Answer:

It is false :l

Explanation:

Pahoehoe is a smooth and continuous lava crust. Pahoehoe forms when the effusion rate is low and consequently the velocity of lava flow is slow. Pahoehoe lava flow is usually at least 10 times slower than typical aa lava flow.

:/

7 0
3 years ago
A 248-g piece of copper is dropped into 390 mL of water at 22.6 °C. The final temperature of the water was measured as 39.9 °C.
max2010maxim [7]

Answer:

The answer to your question is: Initial temperature of copper = 67.1°C

Explanation:

Data

mass Copper = 248 g

volume Water = 390 ml

T1 water = 22.6°C

T2           = 39.9°C

T1 copper = ?

Specific heat water = 1 cal/g°C

Specific heat copper = 0.092 cal/g°C

Formula       copper             water

Heat is negative for copper because it releases heat

                  - mCp(T2 - T1) = mCp(T2 - T1)                  

                  - (248)(39.9 - T1) = 390 (1)((39.9 - 22.6)           Substitution

                 -9895.2 + 248T1 = 390(17.3)                             Simplification

                 -9895.2 + 248T1 = 6747

                 248 T1 = 6747 + 9895.2

                 248 T1 = 16642.2

                 T1 = 16642.2 / 248

                 T1 = 67.1 °C                                                         Result

6 0
3 years ago
The advantage of asexual reproduction is.
Nataly_w [17]
B. reproduction doesn’t require mate
6 0
3 years ago
Science and technology are different, yet related, fields of study. Which action is best classified as science?
Nitella [24]

Answer:

Option D

Explanation:

analyzing cells is something I'm doing in science class right now!

Hope this helped, have a nice day! :)

7 0
3 years ago
-Example of an element that has an electron distribution ending in s2p1?
nataly862011 [7]
Example of an element that has an electron distribution ending in s2p1 is Na or sodium. The complete electron configuration of Na 1s22s22p63s<span>1. </span>Example of an element that has an electron distribution ending in s2d2 is Ca or calcium. The complete electron configuration of Ca is 1s22s22p63s23p64s2.
4 0
3 years ago
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