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3 years ago

87 g of oxygen gas would occupy how many liters of volume at stp

1 answer:

8 0

Number of mole : mass/ molar mass

87g/ (2 x 16) = 2.719 mol

volume = number of mole x molar volume
volume = 2.719 x 22.4
volume = 60.906 L

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Regarding water molecules, adhesion is best described as * the attraction water molecules have to other water molecules the attr

Helen [10]

Answer:

the attraction water molecules have to other surfaces

Explanation:

Adhesion is defined as the attractive forces between unlike substances, e.g water moving up a capillary tube.

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).

So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.

3 0

3 years ago

Answer the following questions for this equation: 2 H2 + O2 --> 2 H2O

laiz [17]

Answer:

1 Mole O₂ / 2 Mole H₂O

Explanation:

The balance chemical equation for the synthesis of water is as follow,

2 H₂ + O₂ → 2 H₂O

In this equation the moles are specified by the coefficients i.e.

2 moles of H₂ reacting with 1 mole of O₂

2 moles of H₂ producing 2 moles of H₂O

1 mole of O₂ producing 2 moles of H₂O

Hence the molar ratio for O₂ and H₂O can be written as,

1 Mole O₂ : 2 Mole H₂O

or,

1 Mole O₂ / 2 Mole H₂O

5 0

3 years ago

Why can't polyatomic ions ever stand alone?

natta225 [31]

I believe its because oxygen and carbon cant be sperated

8 0

4 years ago

in an oversight in the experiment jamie did not add the 4-5 additional drop of 6M JNO3. as result, will the reported number of m

kaheart [24]

The reported number of moles will be too low since the additional amount of oxygen is not included. It may be 6 drops but the molarity of the solution is 6M. this meas that for every ml of the JNO3 solution there is 6 moles of JNO3. In every mole of <span>JNO3 there are 3 moles of oxygen. So in every drop of oxygen there are 18 moles of oxygen. </span>

6 0

3 years ago

In a molecule of calcium sulfide, calcium has two valence electron bonds, and a sulfur atom has six valence electrons. How many

mote1985 [20]

There are none

<h3>Further explanation</h3>

Given

a molecule of calcium sulfide

two valence electron of Calcium(Ca)

six valence electrons of Sulfur(S)

Required

number of lone pairs of electrons

Solution

Lewis structure shows the form of bonds that occur in the valence electrons of an element or compound

Valence electrons are electrons used in a chemical bond

To achieve stability, the element S needs 2 more electrons which are obtained from 2 electrons from the Ca element,

A lone pair electron means refers to an unshared pair of electrons(not bonding to the other atoms)

This condition usually occurs in covalent bonds

As we know, the bond between Ca, which is a group 2 (metal) with Sulfur in group 16, is an ionic bond because it occurs between metal and non-metal ions, so there is no sharing of electrons, but there is a release of electrons from Ca ions to S ions to form an octet. , so all the valence electrons in S are paired

7 0

3 years ago