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Kipish [7]
3 years ago
14

Tornadoes can be identified and tracked using advanced instruments that can detect small changes in wind velocity and air pressu

re. What benefit do these instruments provide?
A.
They can predict tornadoes weeks in advance.
B.
They can change the path of a tornado.
C.
They can be used to issue early tornado warnings.
D.
They can prevent most tornadoes from forming.
Chemistry
1 answer:
Crank3 years ago
4 0
C would be the only logical answer if you really think about what it’s saying about the instrument.
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3 years ago
State whether the following statement is true.justify the answer with examples
Ilya [14]

Answer:

False

Explanation:

Atoms only achieve complete outer electron shells if they contain an outer shell with 7 electrons before gaining another electron or an outer shell with 1 electron before losing an electron. This is assuming that the octet-rule can be applied to said atom. In addition, the number of valence electrons varies from atom to atom which is why not ALL atoms achieve complete outer electron shells after gaining or losing just ONE electron.

7 0
3 years ago
Which of the following can be characterized as a physical change?
Taya2010 [7]

Answer:

D. Sweat evaporates from your skin

Explanation:

A physical change is a reversible process, no new substance is formed. A physical change does not affect the chemical composition of a substance.

Sweat evaporation from the skin is a physical change, because the change that occur is merely a change of state, Liquid to Gaseous state, no new substance is formed.

7 0
3 years ago
How many atoms are in 187 g of Calcium?
N76 [4]
Atomic mass Calcium ( Ca) = 40.078 u.m.a

40.078 g --------------- 6.02x10²³ atoms
187 g ------------------- ??

187 x ( 6.02x10²³) / 40.078 =

1.125x10²⁶ / 40.078 = 2.808x10²⁴ atoms

hope this helps!




4 0
3 years ago
What is the average of atomic mass of carbon if 98.90% of the atoms are c-12 and 1.100% are c-13 atoms?
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