<em>Answer:</em>
<em>242 gram</em> of HF will be required for complete rex.
<em>Balance chemical equation:</em>
SiO2 + 4HF → SiF4 + 2H2O
<em>Data given</em>
mass of SiO2 = 182g
molar mass of SiO2=60.08
moles of SiO2 = mass/molar mass = 182/60.08 =3.02 moles
From balance chemcial equation
SiO2 : HF
1 : 4
3.02 = 4 × 3.02 = 12
mass of HF= no. of moles × molar mass
mass of HF = 12.08×20 =<em> 242 g</em>
Answer:
V₂ = 453.125 mL
Explanation:
Given data:
Initial volume = 25.0 mL
Initial molarity = 1.45 M
Final molarity = 0.0800 M
Final volume = ?
Solution:
Formula:
M₁V₁ = M₂V₂
Now we will put the values in formula.
1.45 M × 25.0 mL = 0.0800 M × V₂
V₂ = 1.45 M × 25.0 mL / 0.0800 M
V₂ = 36.25 M.mL / 0.0800 M
V₂ = 453.125 mL
<em>Answer:</em>
- Such a alkane has only one ring that is cyclooctane.
<em>Explanation:</em>
- The general formula of alkane is CnH2n+2. Such general formula is applicable for only open chain alkane.
- When alkane form ring, then this formula does not remain valid.
- The general formula of Cycloalkane is CnH2n.
As in this case, there are 8-carbon and 16-hydrogen that is according to above cycloalkane formula.
Answer:
<u><em>No</em></u>, changes in matter are <em><u>physical changes</u></em>.
Explanation:
Answer: 4 water from rain and snow that travels to streams im pretty sure!