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ANEK [815]
3 years ago
13

During a chemical reaction, substances (called reactants) are combined to form new substances (called products). Which of the fo

llowing accurately describes the reactants and the products of a chemical reaction? The products contain a different number of atoms than the reactants but have the same properties The number of atoms and the properties are the same in the reactants and the products The products contain the same number of atoms as the reactants but have different properties The number of atoms and properties are different int he reactants and the products​
Chemistry
1 answer:
il63 [147K]3 years ago
7 0

The number of atoms and properties are different int he reactants and the products.

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What is the rate of a reaction if the values are
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Answer:

Explanation:

Hi there,

To get started, let's first observe our rate law:

R=k[A]^2[B]^2     we typically use square brackets [x] for chemistry kinetics, because they specifically tell us we are dealing with <em>concentrations</em>.

This rate law is in fourth-order, because the concentrations powers add up to 4. We are not told the unit of time for this prompt (unless you know it), so I just assumed the time unit to be "time."

To calculate the reaction rate, we simply plug in the concentration of A and B into the rate law. k is the <em>rate constant</em> and stays the same for an individual reaction.

R=(0.1 \ M^{-3}*time^{-1})[1 \ M]^2[2 \ M]^2=0.4 \ M/time

Thus, the rate of reaction with those concentrations is 0.4 M/time.

Notice, the rate constant does in fact have units of it own. The unit for k can be calculated by knowing that:

  1. Rate (R) must end up with units of concentration (M) per time.
  2. The concentrations raised to a power can be used to help solve for the units of k.

If you liked this solution, leave it as Brainliest Answer and give a Rating!

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Answer:

The answer is below

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The density of an object is its mass per unit of volume. Dense objects feel very heavy for their size, while for objects with low density they are very light for their size.  

Density is the ratio of mass to volume; it is given by:

Density (D) = mass (m) / volume (V)

An object sinks in water if the density of the object is greater than the density of water. While an objects floats on water if the density of the object is les than the density of water

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