Answer:
When stargazers go outside at night to look at the sky, they see the light from distant stars, planets, and galaxies. Light is crucial to astronomical discovery. Whether it's from stars or other bright objects, light is something astronomers use all the time. Human eyes "see" (technically, they "detect") visible light.
Answer:
Diagram Z
Explanation:
A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.
Answer:
0.083
Explanation:
Explanation:
We're asked to find the molar concentration (molarity) of the HCl solution, given some titration measurements.
Let's first write the chemical equation for this neutralization reaction:
NaOH(aq)+HCl(aq)→NaCl(aq)+H2O(l)
Since we're given the molarity and volume of the NaOH solution used, we can calculate the moles be using the molarity equation:
mol solute=(molarity)(L soln)
=(0.1molL)(0.0332L)=0.00332 mol NaOH
Since all the coefficients in the chemical equation are 1, the relative number of moles of HCl used is also 0.00332 mol.
Finally, let's use the molarity equation again to find the molarity of the HCl solution (given the volume of NaOH soln is 40 mL, which must be in liters when using molarity equations):
molarity=mol soluteL soln
=0.00332lmol HCl0.040lL=0.083M