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4 years ago

What changes if the degree (amount) of intermolecular bonds of a substance are changed?

Chemistry

2 answers:

elixir [45]4 years ago

7 0

<h2>Answer:</h2>

The correct answers are;

volume of a substance

density of a substance

The volume and the density of the substance depend on inter molecular forces of the substance. So, when we will change the degree of inter molecular forces, whether decrease it or increase it, it will affect the volume and density of a substance.

Nuetrik [128]4 years ago

6 0

Answer: The correct statements are volume of a substance and density of a substance.

Explanation:

Degree of intermolecular bonds is defined as the forces by which two particles are bonded in a substance. If the intermolecular forces are strong, it means that it will occupy less space or volume and hence, the density of that substance will be more.

If the intermolecular forces are weak, it means that it will occupy less space and density of the substance will be more.

Relationship between volume and density of a substance is given by the relation:

$Density=\frac{Mass}{Volume}$

Density and volume has inverse relationship. If volume increases, density will decrease and vice-versa.

Hence, the correct statements are volume of a substance and density of a substance.

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If 56.8 ml of bacl2 solution is needed to precipitate all the sulfate ion in a 554 mg sample of na2so4 (forming baso4), what is

IrinaVladis [17]

0.0687 m The balanced equation is BaCl2 + Na2SO4 ==> BaSO4 + 2 NaCl Looking at the equation, it indicates that there's a 1 to 1 ratio of BaCl2 and Na2SO4 in the reaction. So the number of moles of each will be equal. Now calculate the number of moles of Na2SO4 we had. Start by looking up atomic weights. Atomic weight sodium = 22.989769 Atomic weight sulfur = 32.065 Atomic weight oxygen = 15.999 Molar mass Na2SO4 = 2 * 22.989769 + 32.065 + 4 * 15.999 = 142.040538 g/mol Moles Na2SO4 = 0.554 g / 142.040538 g/mol = 0.003900295 mol Molarity is defined as moles per liter, so let's do the division. 0.003900295 mol / 0.0568 l = 0.068667165 mol/l = 0.068667165 m Rounding to 3 significant figures gives 0.0687 m

3 0

4 years ago

Which of these outcomes is conclusive evidence that mixing sugar in water is a physical change?

lions [1.4K]

There is no molecular change

8 0

3 years ago

75.0 grams NaBr Find the molar mass and number of moles

AVprozaik [17]

Answer:

Molar mass = 103.0 g/mol,

0.728 mol NaBr

Explanation:

Molar mass M(NaBr) = M(Na) + M(Br) = 23.0 + 80.0 = 103.0 g/mol

75.0 g NaBr * 1 mol NaBr/103.0 g NaBr=0.728 mol NaBr

7 0

3 years ago

Steve and Meg are doing an experiment where they need to make 37 grams of Fe2O3. How many grams of Fe would they need ?

Anna11 [10]

Answer:

25.9g

Explanation:

Molecular mass of Fe₂O₃ = (56 * 2) + (16 * 3)

= 112 + 48 = 160

Let's follow the unitary method now

In 160g Fe₂O₃ , there is 112 g Fe

In 1 g Fe₂O₃ , there is 112 / 160 g Fe

In 37 Fe₂O₃ , we need 112 * 37 / 160

= 25.9 g Fe

5 0

3 years ago

After studying weather, Beto bought a simple weather station and put it up in his yard. He was especially interested in wind and

Alex73 [517]

Incomplete question. The remaining part reads;

Choose the correct words or phrases to complete the sentences.

Global winds occur due to

1. Choose...

a. solar currents

b. convection currents

c. sea breezes

d. uneven heating

over a large area and this forms

2. Choose...

a. solar currents

b. convection currents

c. sea breezes

d. uneven heating

caused by cool and warm air.

Answer:

1. d. uneven heating

2. b. convection currents

Explanation:

1. What Beto should know is that as the earth moves and rotates around the sun, some parts of the Earth receive more sunlight and others less, which then leads to uneven heating over a large area of the earth.

2. This uneven heat then forms a convection current containing varying patterns of air spreading to various parts of the globe.

8 0

3 years ago