Answer:
0.2257kg
Explanation:
Using the formula density= mass/ volume
- density=22.57g/cm³
- volume=1*4*2.5cm³= 10cm³
- mass is unknown
22.57g/cm³=mass/10cm³
mass = 22.57g/cm³*10cm
=225.7g
but in kg
= 0.2257kg
Answer:
an earthquake
Explanation:
the tectonic plates rub together sending shockwaves
<span>When you write the Lewis structure you see that you have three bonding pairs and one lone pair on nitrogen, the central atom.
What (a) is asking for is what is called the "electron pair geometry", which in your case is tetrahedral. As the name implies, the electron pair geometry looks only at the electron pairs, and not whether they are bonding or not. The electron pair geometry will establish what geometry the molecule can be.
Question (b) is asking for the "molecular geometry", which is trigonal pyramidal. "Trigonal pyramidal" is withing the "tetrahedral" family of electron pair geometries. The molecular geometry looks only at the shape created by the atoms which are bonded to the central atom. The N and 3 F's form a trigonal pyramid, not a tetrahedron, since there is not a fourth atom bonding at the lone pair. </span>
Answer:
22.5mL is the volume of the water
Explanation:
When the graduated cylinder is in the 25.0mL mark, the mass of this volume is 22.4g. To convert this mass to volume we need to use density, as follows:
22.4g × (1mL / 0.99704g) = 22.5mL is the volume of the water.
That means the cylinder is uncalibrated in 2.5mL when the cylinder is in the 25.0mL mark
