CHEMISTRY HIGH SCHOOL

A _____ is a new substance formed in a chemical reaction.A. coefficient

 

B. product

Answers

Answer 1
Answer: B. product
Think about it like this: a company produces products, not coefficients.

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Which best describes is the ∆G, ∆H, ∆S and T of a forest fire?

Answers

Below are the choices and the answer is C. 

A. ∆G=negative, ∆H= positive, ∆S= positive, T = large 
B. ∆G=positive, ∆H= positive, ∆S= positive, T = large 
C. ∆G=negative, ∆H= negative, ∆S= positive, T = large 
D. ∆G=negative, ∆H= positive, ∆S= negative, T = large 
E. ∆G=positive, ∆H= positive, ∆S= negative, T = large

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How many total electrons can be contained in the 4d sublevel?
2
6
10
14

Answers

The s sublevel has just one orbital, so can contain 2 electrons max. The p sublevel has 3 orbitals, so can contain 6 electrons max. The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max.
So, having this in mind, 10 electrons in total can be contained in the 4d sublevel.
The maximum number is 10

How many thorium atoms would have to be lined up side by side to span 1.80 mm ?

Answers

To calculate how many thorium atoms would have to be lined up side by side to span 1.80 mm, you can use the following steps:

1. Find the atomic radius of thorium (Th). The atomic radius of thorium is approximately 180 picometers (pm), which is 180 x 10^-12 meters.

2. Convert 1.80 mm to meters. There are 1,000,000 picometers in a millimeter, so 1.80 mm is equivalent to 1.80 x 10^-3 meters.

3. Divide the length you want to span (1.80 x 10^-3 meters) by the atomic radius of thorium (180 x 10^-12 meters):

(1.80 x 10^-3 meters) / (180 x 10^-12 meters) = 10,000,000

So, you would need to line up approximately 10,000,000 thorium atoms side by side to span 1.80 mm.

The pH of normal rainwater is

Answers

The pH of normal rainwater is 5.6. It's slightly acidic
it is 5.6    that  is  the   hp  for   rainwater

Which interaction produces dispersive forces by creating temporary dipoles that induce dipoles in other molecules?

Answers

This type interaction is called the London dispersion force. These are temporary forces that happens when electrons of two adjacent atoms occupy positions that will result to temporary dipoles. The constant motion of the electrons will cause to form an instantaneous dipole when the electrons are unsymmetrically distributed. These forces are present in nonpolar substances.

When ________ are added to an atomic nucleus, energy is produced and this is called a fusion reaction.a. protons
b. neutrons
c. protons or neutrons
d. protons, neutrons or electrons

Answers

When neutrons are added to an atomic nucleus, energy is produced and this is called a fusion reaction. The answer is letter B. To be exact, two nuclei combine to produce a more stable nucleus. The positive charge on both nuclei result in a large electrostatic energy barrier to fusion.

The correct answer is c because the nuc are combing more protns and neutrons. The answer suposed to be protons and neutrons NOT PROTONS OR NEUTRONS?!!
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