Answer:
2 g/mL
Explanation:
The following data were obtained from the question:
Mass (m) = 5 g
Volume (V) = 2.5 mL
Density (D) =.?
Density is simply defined as the mass of substance per unit volume of the substance. Mathematically, it is expressed as:
Density (D) = mass (m) /volume (V)
D = m/V
With the above formula, we can obtain the density of the ball as follow:
Mass (m) = 5 g
Volume (V) = 2.5 mL
Density (D) =.?
D = m/V
D = 5/2.5
D = 2 g/mL
Therefore, the density of the ball is 2 g/mL.
Answer: BF3
Explanation: boron needs 4 electron to obtain octet and Fluorine has just one. For the valence shell to be completely filled it will have to form BF4- with 4 fluorine atom surrounding it.
I can't answer this question because the problem is incomplete; no choices were given. Luckily, I found a similar problem from another website which I've attached as a picture down below. An ion-dipole bond results when one dipole molecule is present with an ion in the solution. Water is a dipole molecule. Now, CH₃OH, an alcohol, is a nonelectrolyte. It doesn't dissociate into ions when solvated. On the otherhand, Ca(NO₃)₂ dissociates into Ca²⁺ and 2 NO₃⁻ ions.
<em>Therefore, the answer is Ca(NO₃)₂.</em>
Answer:
The lake went from a liquid to a solid
Explanation:
Since it was so cold overnight, the temperature of the lake increased to the fact that it turned hard enough to skate on. or The temperature outside was so cold it froze the lake solid