The think that happens to the number of carbon atoms in each compound is that they increase by 1
Answer:
Let's assume that the erosion rate is "X/hour". The total volume of sand on a beach after 24 hours would be,
= total sand volume - (erosion rate per hour * 24)
= 1,278m - (X/hour * day)
Explanation:
Now assume that the erosion rate is 1 m per hour. Therefore, in 24 hours would be,
= 1,278m - (1/hour * 24)
= 1,278 - 24
= 1254 m.
Answer:
Zn2+ is colourless
Explanation:
We know that transition metal salts are usually coloured due to the possibility of d-d transition.
This d-d transition can only occur when there are vacant d-orbitals. The electronic configuration [Ar] 4s23d8 suggests the presence of vacant d-orbitals and the possibility of the compounds of Zn2+ being coloured.
However, the absence of colours in Zn2+ compounds shows that there is no d-d transition(electronic) spectra observed for Zn2+ because the d orbitals are completely filled. This means that the correct electronic configuration of the ion is [Ar] 3d10.
Answer:
B. Trees can be replenished
Explanation:
Trees are renewable and replenishable resources. Trees can be planted, grown up, and harvested for timber.
If the solute is properly distributed in the given volume, there are 2.642 g of (NH4)2SO4 per 10 mL. For the new solution, divide the 2.642 g by the molar mass of the compound. The answer is 0.02 moles. Then, divide this by the new volume, 50 mL or 0.05 L. The concentration of the new solution is 0.4 M.
