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Levart [38]
3 years ago
11

Please help, i need help! it’s for chemistry!

Chemistry
1 answer:
viktelen [127]3 years ago
7 0

Sodium - metallic bonding

Oxygen - covalent bonding

Sodium chloride - ionic bonding

Magnesium oxide - ionic bonding

Nitrogen fluoride - covalent bonding

Aluminium - metallic bonding

Calcium hydroxide - ionic bonding

Silicon fluoride - covalent bonding (not 100% sure on this one)

Chlorine - covalent bonding

Potassium oxide - ionic bonding

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Please help me with this. (: I'd appreciate it.
Soloha48 [4]

Answer:

The answer to your question is:  ΔH = -283 kJ/mol, first option

Explanation:

Reaction

                CO  +  O₂     ⇒     CO₂

ΔH = ∑H products - ∑H products

ΔH = -393.5 - (-110.5 + 0)

ΔH = -393.5 + 110.5

ΔH = -283 kJ/mol

4 0
2 years ago
Identify the basic structure of a chemical equation?
antiseptic1488 [7]
It is the crust, the least dense layer.


3 0
3 years ago
chegg 2. What pattern did you observe measuring cell voltages with a silver electrode versus with a platinum/H2 electrode
Eduardwww [97]

chegg 2. What pattern did you observe measuring cell voltages with a silver electrode versus with a platinum/H2 electrode There is a difference of -0.786 V in silver

<h3>What is cell voltages ?</h3>

The difference in electric potential between two points, also known as voltage, electric potential difference, electric pressure, or electric tension, is what determines how much labor is required to move a test charge between the two sites in a static electric field. Volt is the name of the derived unit for voltage (potential difference) in the International System of Units. Joules per coulomb, or 1 volt equals 1 joule (of work) for 1 coulomb, is how work per unit charge is stated in SI units (of charge). The quantum Hall and Josephson effect was first employed in the 1990s, and most recently (in 2019), fundamental physical constants have been added for the definition of all SI units and derived units. Power and current were used in the previous SI definition for volt.

To learn more about  cell voltages from the given link:

brainly.com/question/18938125

#SPJ4

7 0
2 years ago
How many moles in 250g of CBr 4
EleoNora [17]

Answer:

fzdfxbgfdgbfbfggf

Explanation: fregrgsrg5

7 0
2 years ago
A substance with a pH of 4.0?
IrinaVladis [17]
Tomato juice or acid rain
7 0
3 years ago
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