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4 years ago

Rank the following 0.100 M solutions in order of increasing H3O+ concentration:

Chemistry

1 answer:

Inessa05 [86]4 years ago

5 0

Answer:

HCN < HOCl < HF

Explanation:

The larger the Kₐ value, the stronger the acid.

6.2 × 10⁻¹⁰ < 4.0 × 10⁻⁸ < 6.3 × 10⁻⁴

HCN < HOCl < HF

weakest stronger strongest

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How many atoms should be present at the end of the reaction ?

miskamm [114]

Conservation of mass and every means it should be equal on both sides. So there should be another 2 Cl on the other side of the reaction

6 0

3 years ago

Why can a liquid take the shape of the bottom of its container?

VLD [36.1K]

Answer: Option (a) is the correct answer.

Explanation:

In a liquid state, particles are held less tightly as compared to a solid state. So, they have some kinetic energy due to which they collide with each other.

As a result, particles of a liquid are able to slide past each other. Hence, they are able to acquire the shape and volume of a container in which they are poured.

Whereas when particles of a liquid can break free from one another and spread out then it means a substance is present in a gaseous state.

When the particles of a liquid can vibrate within their fixed locations then it means the substance is present in a solid state. And, they have definite shape and volume.

Thus, we can conclude that a liquid take the shape of the bottom of its container as the particles of a liquid can flow around one another to new locations.

8 0

4 years ago

An object’s mass is determined to be 32.5 g. When the object is placed in a graduated cylinder containing 175 mL of water, the w

MakcuM [25]

<h3><u>Given :-</u></h3>

Mass of object = 32.5 g

Dentity of the material

<h3><u>Solution:- </u></h3>

When the object is placed in a graduated cylinder containing 175 ml of water, the water in the cylinder rises to a level of 187.5 ml , this implies that volume of content in the container has increased , the increased volume is volume of the object placed

So, Volume of object

= Increased Volume - Initial volume

= > 187.5 -175

= > 12.5 ml

Since 1 ml = 1 cm³ we can write

$\quad$ 12.5 ml = 12.5 cm³

Now,

$\green{ \underline { \boxed{ \sf{Density= \frac{Mass}{Volume}}}}}$

Putting Values -

$\begin{gathered}\\\implies\quad \sf Density = \frac{32.5}{12.5} \\\end{gathered}$

$\begin{gathered}\\\implies\quad \sf Density = \frac{325}{125} \\\end{gathered}$

$\begin{gathered}\\\implies\quad \sf Density = 2.6 g/cm^3 \\\end{gathered}$

>> The density of the material is 2.6 g/cm³

6 0

2 years ago

Why is tea, coffee, and hot chocolate usually made with hot water? (Use the word molecule in your answer)

melisa1 [442]

Answer:

Heat allows molecules to spread out and expand more. Also, things dissolve faster in hot water.

Explanation:

Hope this helps

4 0

3 years ago

Lithium and nitrogen react in a combination reaction to produce lithium nitride:6Li (s) + N2 (g) â 2Li3N (s)In a particular expe

Mademuasel [1]

Answer:

The answer to your question is letter D

Explanation:

Data

mass of Li = 4.5 g

mass of N₂ = 4.5 g

limiting reactant = ?

Reaction

6Li (s) + N₂ (g) ⇒ 2Li₃N

This reaction is balanced

Process

1.- Calculate the molecular mass of the reactants

Li = 7 x 6 = 42g

N = 14 x 2 = 28 g

Calculate the limiting reactant using proportions

Theoretical proportion Li / N = 42 / 28 = 1.5

Experimental proportion Li/N = 4.5/4.5 = 1

As the experimental proportion was lower than the theoretical, the limiting reactant is Lithium

2.- Calculate the theoretical yield of Li₃N

42 g of lithium -------------- 70 g of Li₃N

4.5 g of lithium ------------- x

x = (4.5 x 70) / 42

x = 315 / 42

3 0

3 years ago