Answer:
Phosphorus
Explanation:
Phosphorus needs 3 electrons to complete its outter most shell of electrons
Answer:
I am going to say A
Explanation:
solids are normally close and tightly packed molecules and while ice is in solid form,so is it.
Let me know if i was right! Hope this helps! :)
Answer:
Volume of 80% pure antifreeze used = 180 gallons.
Volume of water to be used = 240 - 180 gallons = 60 gallons
Explanation:
Let the volume of 80% pure antifreeze used to make 60% pure antifreeze = x gallons
The volume of 60% pure antifreeze = 240 gallons
For 80% pure antifreeze:
C₁ = 80% , V₁ = x gallons
For 60% pure antifreeze :
C₂ = 60% , V₂ = 240 gallons
Applying,
C₁V₁ = C₂V₂
80×x = 60×240
x = 180 gallons
<u>Thus , volume of 80% pure antifreeze used = 180 gallons.</u>
<u>Volume of water to be used = 240 - 180 gallons = 60 gallons</u>
Answer:
The height of the mountain is 1.33 km.
Explanation:
a and b) See the attached figure for a description of the situation
c) For right triangles, this trigonometric rule applies:
tangent angle = opposite side / adjacent side
Then, in our problem:
tg 12º = y / x
tg 14º = y / (x-1)
d) using the first equation:
tg 12º = y / x
x * tg 12º = y
Replacing "y" for "x * tg 12º" in the second equation and solving for x:
tg 14º = (x * tg 12º) / (x-1)=
tg 14º * (x-1) = tg 12º * x
0.25 x -0.25 = 0.21 x
0.25 x - 0.21 x = 0.25
0.04 x = 0.25
x = 6.25
Then:
y = tg 12º * x
y = 6.25 * tg 12º = 1.33 km