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3 years ago

What causes an ionic bond to form?Look at the picture above

Chemistry

2 answers:

Gennadij [26K]3 years ago

7 0

Attraction between a cation in one element and an anion in the other element

Andreas93 [3]3 years ago

7 0

Answer:

Attraction between a cation and an anion.

Explanation:

Oppositely charged particles attract each other. When the particles are cations and anions, we call the attractive force an ionic bond.

B is wrong. An anion and a cation attract each other.

C is wrong. Sharing of electrons among metal atoms creates a metallic bond.

D is wrong. Sharing of electrons between two nonmetals creates a covalent bond.

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Answer:

steam and methane

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2 years ago

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2 years ago

Show your work with good use of units, rounding, and significant figures. [Hint: it is good practice to show the value of your a

mel-nik [20]

Heat required : 4.8 kJ

<h3>Further explanation </h3>

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

Q = mLv (vaporization/condensation)

Lf=latent heat of fusion

Lv=latent heat of vaporization

The heat needed to raise the temperature

Q = m . c . Δt

1. heat to raise temperature from -20 °C to 0 °C

$\tt Q=10\times 2.09\times (0-(-20)=418~J$

2. phase change(ice to water)

$\tt Q=10\times 333=3330~J$

3. heat to raise temperature from 0 °C to 25 °C

$\tt Q=10\times 4.18\times (25-0)=1045~J$

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2 years ago

Calculate the number of moles of carbon dioxide formed when 40.0 moles of oxygen is consumed in the burning of propane. Note the

joja [24]

The first step is to balance the equation:

C3H8 + 5O2 ---> 3CO2 + 4H2O

Check the balance

element left side right side

C 3 3
H 8 4*2 = 8
O 5*2=10 3*2 + 4 = 10

Then you have the molar ratios:

3 mol C3H8 : 5 mol O2 : 3 mol CO2 : 4 mol H2O

Now you have 40 moles of O2 so you make the proportion:

40.0 mol O2 * [3 mol CO2 / 5 mol O2] = 24.0 mol CO2.

Answer: option D. 24.0 mol CO2

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3 years ago