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Alex_Xolod [135]
2 years ago
5

Why do non-metal aroms form covalent bonds e.g. H2O​

Chemistry
1 answer:
Oksana_A [137]2 years ago
7 0

Answer:

Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom. ... Covalent compounds tend to be soft, and have relatively low melting and boiling points.

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Why is water necessary for rusting to happen?
Triss [41]
You need oxygen and water
5 0
3 years ago
Help me please. <br> Thermal energy can come from other forms of energy. Give several examples how.
pychu [463]

a heater turns electrical energy into thermal energy

the sun turns gas into thermal energy

annd i cant think of anymore but i hope this helps you

5 0
3 years ago
How much heat is released when 6.00 g of methane is combusted using the reaction below? CH4 + 2O2 ? CO2 + 2H2O ?Hrxn = -890. KJ
goblinko [34]

Answer : The amount of heat released is, -121.04 KJ

Solution : Given,

Enthalpy of reaction, \Delta H_{rxn} = -890 KJ

Mass of methane = 6 g

Molar mass of methane = 44 g/mole

First we have to calculate the moles of methane.

\text{Moles of methane}=\frac{\text{Mass of methane}}{\text{Molar mass of methane}}=\frac{6g}{44g/mole}=0.136moles

The given balanced reaction is,

CH_4+2O_2\rightarrow CO_2+2H_2O

From the balanced reaction we conclude that

1 mole of methane releases heat = -890 KJ

0.136 moles of methane releases heat = \frac{0.136moles}{1mole}\times -890KJ=-121.04KJ

Therefore, the amount of heat released is, -121.04 KJ

8 0
3 years ago
Read 2 more answers
Which sentence describes two atoms that form an ionic bond?
xz_007 [3.2K]

Answer:

The correct answer is "D. The difference in their electronegativities is greater than 1.7"

Explanation:

An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.

So, this type of bond consists of the attraction of atoms with electric charges of different signs, that is, the bond is established when atoms of low electronegative elements (metals) are bonded with atoms of highly electronegative elements (nonmetals).

So you can say that atoms of electronegativity difference equal to or greater than 1.7 participate in this type of bond (with its exceptions).

<u><em>The correct answer is "D. The difference in their electronegativities is greater than 1.7"</em></u>

8 0
2 years ago
3) If 2.5 moles of H2O are produced, how many moles of hydrogen gas must be used?
Dahasolnce [82]

Answer:

2.5 moles of H2

Explanation:

First, let us write a balanced equation for the reaction of Hydrogen to produce water. This is shown below:

2H2 + O2 —> 2H2O

From the equation above,

2 moles of H2 produced 2 moles of H2O.

Therefore, 2.5 moles of H2 will produce 2.5 moles of H2O

5 0
3 years ago
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