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LuckyWell [14K]
3 years ago
5

Any substance composed of two or more elements that are chemically combined in a fixed proportion is

Chemistry
1 answer:
laila [671]3 years ago
5 0
It is a compound……….
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23• C=_____K what’s the answer 23 296 -250 123
UkoKoshka [18]

Kelvins = Celsius + 273

Kelvins = 23 + 273

answer = 296

5 0
3 years ago
2022
Lapatulllka [165]

Answer:

OOO

Explanation:

OOOOOO

8 0
2 years ago
Methane (CH4) is a gas that is found in small quantities in earths atmosphere. which type of bonds does methane have and why doe
OLga [1]

Answer:

Methane is a covalent bond. Methane is a chemical compound from the bonding  one carbon atom and for hydrogen atoms. Although electronegativity increases as you go right of the periodic table, hydrogen has an electronegativity of 2.20. Chlorine has an electronegativity of 2.55. There difference in electron negativity (0.34). Therefore it is a non polar compound. If there difference was much greater, than they would form a ionic bond. Alkali metals tend to form the most ionic bond, but although hyrdogen is placed with them, it has a higher electronegativity so hydrogen is an exception.

Carbon has 4 valence electrons so it will want to gain 4 more electrons to become stable (Octet rule). Hydrogen has 1 valence electron, so it will want to lose it to become stable. Therefore, one carbon atom takes 1 electrons from 4 hydrogen atoms.

8 0
2 years ago
PLEASE HELP
muminat

Answer:

H2O and CO

Explanation:

they both form covalent bonds because none both of the elements are non-metal. Mgo and NaF both have metals in them so they would form ionic bonds.

Covalent bonds, two non-metal

Ionic bonds, a metal and a non-metal

5 0
3 years ago
Read 2 more answers
what volume of concentrated HCl (12 M) is needed to fully neutralize 5 mL of a 1 M solution of sodium bicarbonate (show your set
QveST [7]

Answer:

0.417M

Explanation:

Equation of the reaction

2HCl+Na2CO3→2NaCl+H2O+CO2

From dilution principle

no of mole=conc × volume

from the balanced equation

no of mole of  Na2CO3=2× no of mole of HCl

HCl=acid=A

Na2CO3=base=B

since n=cv

Conc of base × vol of base=2× conc of acid×volume of acid

2M×5ml=2×12M×Volume of acid

volume of acid=10/24

=0.417(3 decimal place)

5 0
3 years ago
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