All categories

2 years ago

Which of the following is an example of a molecular element? a.NaCl b. CO2 c. Na d. O2

Chemistry

1 answer:

Amanda [17]2 years ago

5 0

Answer:

oxygen (O2) is a molecular element

Explanation:

Molecular compound are chemical compounds that take the form of discrete molecules.

atomic element is an element which occurs independently as atoms and can react with other elements to form a compound

Ionic compounds are the compound which on dissolution form ions in solution

Mixture is the composition of different compounds

You might be interested in

HCl(aq) + KOH(aq) → H 2O(ℓ) + KCl(aq)

fredd [130]

Answer:

try a science calculator

Explanation:

5 0

2 years ago

Suppose you throw a cube-shaped object and a spherical-shaped object of equal volume in the same volume of water. The ball sinks

brilliants [131]

I am pretty sure the answer is B but correct me if I'm wrong hope this helps.

6 0

3 years ago

The ph of a solution containing 0.818 M acetic acid<br> (ka1.76*10-5) ans 0.172 M sodium acetate is?

kvasek [131]

Explanation:

It is known that the relation between pH and $pK_{a}$ is as follows.

pH = $pK_{a} + log \frac{[salt]}{[acid]}$

and, $pK_{a} = -log K_{a}$

Hence, first we will calculate the value of $pK_{a}$ as follows.

$pK_{a} = -log K_{a}$

= $-log (1.76 \times 10^{-5}$

= 4.75

Now, we will calculate the value of pH as follows.

pH = $pK_{a} + log \frac{[\text{sodium acetate}]}{\text{acetic acid}}$

= $4.75 + log \frac{0.172}{0.818}$

= 4.75 + (-0.677)

= 4.07

Therefore, we can conclude that the pH of given solution is 4.07.

5 0

3 years ago

NEED HELP PLEASE!!!!

VladimirAG [237]

When you first pull back on the pendulum, and when you pull it back really high the Potential Energy is high and the Kinetic Energy is low, But when up let go, and it gets right around the middle, that's when the Potential energy transfers to Kinetic, at that point the kinetic Energy is high and the potential Energy is low. But when it comes back up at the end. The same thing will happen, the Potential Energy is high, and the Kinetic Energy is low. Through all of that the Mechanical Energy stays the same.

I hope this helps. :)

4 0

2 years ago

Which of the following is not true of Mendel's experiment?

Karolina [17]

I believe it is B. Green pods are recessive.

5 0

2 years ago