3 years ago

What is a reaction rate?

Chemistry

1 answer:

kondaur [170]3 years ago

7 0

Answer:

A reaction rate is a measure of how fast a reactant disappears or a product forms during a reaction.

Explanation:

It is usually defined as the change in concentration per unit time:

Δ(concentration)/Δt

The units are (moles per litre) per second.

In symbols, the units are mol/(L·s) or mol·L^-1 s^-1.

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How many grams of fe2o3 are present in 0.82 mol?

mars1129 [50]

130.954g of Fe2O3 in 0.82 mol

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2 years ago

Read 2 more answers

1) A block of aluminum has a mass of 40.5

-Dominant- [34]

Answer:

15 ml

Explanation:

$\frac{40,5}{y}=\frac{2,7}{1}$

2,7y=40,5

y=40,5/2,7=405/27= 15ml

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2 years ago

1.) A solute is separated from its solvent my evaporation. What kind of process is this?

RideAnS [48]

1) C !! Physical Process

2) A

3) D !! Water is universal solvent !

if you need any explanation ; comment !!

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2 years ago

16. A solution is made by dissolving 25 g of NaCl in enough water to make 1.0 L of solution. Assume the density of the solution

nata0808 [166]

Answer:

The molarity will be "0.43 M" and molality will be "0.43 m".

Explanation:

Given that:

mass of NaCl,

= 25 g

Volume of solution,

= 1 L

Density of solution,

= 1 gm/cm³

Now,

The weight of solvent will be:

= $Volume\times density$

= $1\times 1$

= $1 \ kg$

The mole of NaCl will be:

= $\frac{mass}{Molar \ mass}$

= $\frac{25}{58.44}$

= $0.43$

hence,

The molarity will be:

= $\frac{number \ of \ mole}{Volume \ of \ solution}$

= $\frac{0.43}{1}$

= $0.43 \ M$

The molality will be:

= $\frac{mole \ of \ solute}{Weight \ of \ solvent}$

= $\frac{0.43}{1}$

= $0.43 \ m$

4 0

2 years ago

Of the options below, which is generally associated with the lowest boiling temperatures when it is the only type of bond presen

Olin [163]

Answer:

Explanation:

Of all the given forces , london dispersion force is the weakest inter-molecular force which is temporary in nature . This force results due to two adjecent atoms or molecules becoming dipoles temporarily. This force exists among the atoms of inert gases.

Atoms having this force have lowest boiling point.

5 0

2 years ago