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Ede4ka [16]
3 years ago
11

A gas mixture contains 88 grams of oxygen gas, 88 grams of nitrogen gas, and 12 grams of nitrogen dioxide gas,

Chemistry
2 answers:
emmainna [20.7K]3 years ago
7 0
BROO DEE YOU ALREADY KNOW WHAT IS STOP DA CAP, o.81
bixtya [17]3 years ago
6 0
88 g O2 x 1 mol O2/32 g = 2.75 moles O2
88 g N2 x 1 mol N2/28 g = 3.14moles N2
12 g NO2 x 1 mol NO2/46 g = 0.261 moles NO2
TOTAL moles = 6.15 moles
mole fraction N2 = 3.14/6.15 = 0.51
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Name a chemical that is safe to use in food in small amounts.
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Phthalates.

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Perchlorate

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Nitrates and nitrites

Explanation:

I hope this help

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2 years ago
Infrared (IR) and Nuclear Magnetic Resonance (NMR) are two spectroscopic techniques you've encountered in organic chemistry I, C
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8 0
3 years ago
How many grams of sodium are in 0.820 moles of na2so4?
s344n2d4d5 [400]
<span>the molar mass of a compound is the sum of the products of the atomic masses by the number of atoms of the element.
molar mass of Na</span>₂SO₄<span> is - 142 g/mol.
1 mol of </span>Na₂SO₄<span> has a mass of 142 g.
In 1 mol of </span>Na₂SO₄<span> the mass of Na is 23 g/mol x 2 = 46 g.
                             
Mass of Na in 1 mol of </span>Na₂SO₄ is - 46 g
                           
mass of Na in 0.820 mol of Na₂SO₄ - 46 g /1 mol x 0.820 mol = 37.72 g.
mass of Na is 37.72 g
5 0
3 years ago
Read 2 more answers
Select the correct boxes. which two elements have the same number of valence electrons?
Simora [160]

Carbon and silicon have same number of valance electrons which is 4 electrons

Now, Barium is a 2nd group element. So, it has two valance electrons.

Silicon is a 16th group element and it has 4 valance electrons as does the carbon. This is because they both stay in the same group in the periodic table.

Neon is a noble gas which has 8 valance electrons and stays in the 18th group.

Therefore, carbon and silicon have same number of valance electrons which is 4 electrons.

<h3>What are Valence electrons ?</h3>

The electrons in an atom's outermost shell, or energy level, are called valence electrons. For instance, the valence electrons of oxygen are six, with two in the 2s subshell and four in the 2p subshell.

  • The number of valence electrons for neutral atoms is the same as the number of the atom's main group. A periodic table element's column can be used to determine its main group number. For instance, carbon, which belongs to group 4, has four valence electrons. Group 6 oxygen contains six valence electrons.

Learn more about Valence electrons here:

brainly.com/question/371590

#SPJ4

3 0
2 years ago
How does activation energy affect chemical reactions?
Assoli18 [71]

Enzymes affect the rate of the reaction in both the forward and reverse directions; the reaction proceeds faster because less energy is required for molecules to react when they collide. Thus, the rate constant (k) increases. Figure 3: Lowering the Activation Energy of a Reaction by a Catalyst.

<em>Best of luck,</em>

<em>-Squeak</em>

8 0
2 years ago
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