The part of the Sun that we see during eclipse is the photosphere. The photosphere is scattered by the loose electrons in the corona’s plasma. A total solar eclipse is when the Moon appears to cover the entire solar disc. It lasts no more than 8 minutes.
(1) H2 (3) CH3OH
(2) CH4 (4) NH4Cl
Answer is: (4) NH4Cl.
Name of this chemical copmpound is ammonium chloride.
Ammonium chloride (NH₄Cl) is chemical compound with neutral charge.
1) Hydrogen (H) has oxidation number +1 in compounds with nonmetals (nitrogen and chlorine).
2) Chlorine has oxidation number -1, because ammonium ion (NH₄⁺) has positive charge.
3) In ammonium cation (NH₄⁺), nitrogen has higher electronegativity than hydrogen, so it has negative oxidation number -3:
x + 4 · (+1) = +1.
x = 1 - 4.
x = -3; oxidation number of nitrogen.
Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.
Other molecules have covalent chemical bonds.
An ionic compound is formed when there is a transfer of electrons between two atoms. The formula for an ionic compound is usually written as the combination of the symbols of the two ions. (4) NH4Cl represents an ionic compound as it follows the criteria of an atom losing or gaining electrons.
An ionic compound is formed when there is a transfer of electrons between two atoms. In an ionic compound, one atom will lose electrons to become a positively charged ion, while the other atom will gain those electrons to become a negatively charged ion. The formula for an ionic compound is usually written as the combination of the symbols of the two ions.
Out of the given options, (4) NH4Cl represents an ionic compound. In this formula, the ammonium ion (NH4+) loses one electron to become positively charged, and the chloride ion (Cl-) gains that electron to become negatively charged.
Learn more about Ionic compounds here:
#SPJ6
H2O (s)
CO2 (g)
H2O (l)
(2) 40. mL at 80.°C (4) 80. mL at 40.°C
How should the sentence above be rewritten to correct the subject-verb agreement error?
A) The sentence is correct as written.
B) Tommy the Clown or the Hip Hop Clowns travels the world performing for diverse audiences.
C) Tommy the Clown or the Hip Hop Clowns was travelling the world performing for diverse audiences.
D) Tommy the Clown and the Hip Hop Clowns travels the world performing for diverse audiences.
Answer:
Answer is A) The sentence is correct as written
Explanation:
B) find the speed in mi/h of the runner who set the record of 9.21 seconds.
Answer:
A) The speed of the runner is 23.085 mile/hr.
B) The speed of the runner is 22.209 mile/hr.
Explanation:
A) Distance covered in 9.69 seconds = 100 m
1 mile = 1609.34 m
1 hour = 3600 seconds
9.69 s =
Speed of the runner =
The speed of the runner is 23.085 mile/hr.
B) Distance covered in 9.21 seconds = 100 yards
1 mile = 1760 yards
1 hour = 3600 seconds
9.21 s =
Speed of the runner =
The speed of the runner is 22.209 mile/hr.