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Alborosie
3 years ago
7

Select the correct answer from each drop-down menu.

Chemistry
2 answers:
seraphim [82]3 years ago
5 0

1. protons and neutrons

2. electrons

liraira [26]3 years ago
4 0

Answer:

Protons and neutrons, Electrons

Explanation:

Protons and electrons are found in the center of the nucleus. The atomic mass is the summation of the number of neutrons and protons.  Electrons orbit around the nucleus in an atom. The atomic number is equal to the number of electrons which is also equal to the number of protons.

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Draw a Lewis structure for SO2 in which all atoms have a formal charge of zero. Explicitly showing the zero charges is optional.
Radda [10]

Answer:

See explanation and image attached

Explanation:

"A formal charge (FC) is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity" (chemlibretext).

We can obtain the formal charge from the formula;

Formal Charge = [number of valence electrons on atom] – [non-bonded electrons + 1/2number of bonds].

A structure in which SO2 has a zero formal charge is attached to this answer.

Image credit: Chemtopper

3 0
3 years ago
How many moles of carbon are in a sample of 21.45 moles of heptane(C7H16)???????
saw5 [17]

The  moles  of carbon  that  are in the sample  of 21.45  moles of heptane(C₇H₁₆)  is 150.15   moles

  <u><em>calculation</em></u>

 moles  of carbon = moles  of  heptane  × number of C atom

 number of C atom  in heptane = 1 ×7  = 7 atoms

moles is therefore = 21.45 moles ×  7 =150.15  moles

3 0
3 years ago
Read 2 more answers
Which of these is an example of physical change?
lana [24]
A. Boiling water is an example of physical change, whereas digesting food, breaking glass, and shoveling snow are not.
6 0
3 years ago
a ______ consumer is a heterotroph that directly eats an autotroph. A primary B. Quaterany C tertiary D secondary
Softa [21]
Primary consumer just remember the “primary” (first) consumer so the one that eats a heterotroph
6 0
3 years ago
What is the effect of decreasing the volume of the reaction mixture? What is the effect of decreasing the volume of the reaction
fgiga [73]

Answer:

By decreasing the volume, the equilibrium will shift to the side with the smallest amount of particles

Explanation:

Step 1: Data given

The principle of Le Chatelier says:

When the volume is decreased, the equilibrium will shift to the side of the smallest number of particles.

2NOBr(g) ⇌ 2NO(g)+Br2(g)

In the following example, we have 2 moles of NOBr (on the left side) and 3 moles of gas on the right side. This means the left side, the reactant side, has the smallest number of particles.

The equilibrium will here shift to the left side, the side of NOBr.

In the following example

2NO2(g) ⇌ N2O4(g)

We have 2moles of NO2 on the left side and 1 mol of N2O4 on the right side.

By decreasing the volume, the equilibrium will shift to the side of the smallest number of moles. Here this is the right side, the side of N2O4.

5 0
3 years ago
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