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3 years ago

A sound with more vibrations per second sounds higher than a sound with fewer vibrations per second.

Chemistry

2 answers:

Fudgin [204]3 years ago

6 0

Answer:

that is a false sentence

kondor19780726 [428]3 years ago

6 0

Answer:

I'm sure you've already finished the est but the real answer is true, I took the k12 test and got that one correct, hope this helps anyone!

Explanation:

You might be interested in

(a) Write the dissolution reaction for solid Na2CO3 below. (Use the lowest possible coefficients. Include states-of-matter under

Andreas93 [3]

Answer:

For a: The chemical equation for the dissolution of sodium carbonate is $Na_2CO_3(s)\rightarrow Na_2CO_3(aq.)$

For b: The net acid-base reaction is $CO_3^{2-}(aq.)+H_2O(l)\rightarrow OH^-(aq.)+HCO_3^-(aq.)$

Explanation:

For a:

Dissolution reaction is defined as the reaction in which a solid compound gets dissolved in water to form aqueous solution.

The chemical equation for the dissolution of sodium carbonate follows:

$Na_2CO_3(s)\rightarrow Na_2CO_3(aq.)$

Ionization reaction is defined as the reaction in which an ionic compound dissociates into its ions when dissolved in aqueous solution.

The chemical equation for the ionization of sodium carbonate follows:

$Na_2CO_3(aq.)\rightarrow 2Na^+(aq.)+CO_3^{3-}(aq.)$

For b:

Now, the anion formed which is $CO_3^{2-}$ reacts with water to form conjugate acid.

The chemical equation for the reaction of anion with water follows:

$CO_3^{2-}(aq.)+H_2O(l)\rightarrow OH^-(aq.)+HCO_3^-(aq.)$

Hence, the net acid-base reaction of the anion formed and water is written above.

3 0

3 years ago

In the ground state, has only 1 electron in a p orbital.

zepelin [54]

Aluminium is the element you are looking for

8 0

4 years ago

Read 2 more answers

What type of substances does conduction work best in? in other words what substances are good conductors?

vaieri [72.5K]

Explanation:

Electric conductors are the substances which allow easy passage of electric charges from one atom to another in the presence of a certain amount of voltage.

A conductor in which electric charge passes easily is known as a good conductor. Whereas a conductor in which electric charge passes with difficulty or no electric charge passes through is known as bad conductor.

For example, copper is good conductor of heat and electricity as it conducts flow of current quite easily.

3 0

4 years ago

The density of an element is 19.3 g/cm^3. What is its density in kg/m^3?

Karolina [17]

First, you need to know 1 kg = 10^3 g. And 1 m^3 = 10^6 m^3. So the 1 g/cm3 = 10^3 kg/m3. So the answer is 1.93*10^4 kg/m3.

5 0

3 years ago

What are the missing coefficients for the skeleton equation below?

Kruka [31]

Answer:

4, 3 , 2 and 6

Explanation:

The reaction equation is given as;

NH₃ + O₂ → N₂ + H₂O

Now, we need to balance the reaction equation;

NH₃ + O₂ → N₂ + H₂O

put the numbers a,b,c and d;

aNH₃ + bO₂ → cN₂ + dH₂O

We need to balance the equation algebraically, ;

Conserving N;

a = 2c

Conserving H;

3a = 2d

Conserving O;

2b = d

Now, let c = 1, a = 2, d = 3 and b = $\frac{3}{2}$

multiply through by 2;

a = 4, b = 3, c = 2 and d = 6

Insert the parameters:

4NH₃ + 3O₂ → 2N₂ + 6H₂O

4 0

3 years ago