Answer:
0.01235 moles
Explanation:
<em>Given data:</em>
volume = 47.5 ml = 0.0475 L
concentration = 0.260 M
<em>To find:</em>
number of moles: ?
<em>Formula:</em>
No of moles = concentration x volume (in litres)
M is equal to moles per liter, so if you multiply the volume in liters times the value of M, the result will tell you the number of moles.
<em>Solution: </em>
no. of moles = 0.260 M x 0.0475 L
= 0.01235 moles
If it goes from a volume of x, then when the volume is doubled it will go to a volume of 2x. If you meant what happens to the pressure, then the pressure halves as volume doubles due to Boyle's law.
Answer:
Silicon tetrachloride gas reacts with solid magnesium metal producing solid silicon and solid magnesium chloride.
SiCl₄(g) + Mg(s) → Si(s) + MgCl₂(s)
Explanation:
The reaction of SiCl₄(g) with Mg(s) produce Si(s) and MgCl₂(s). A way to write a word equation could be:
<em>Silicon tetrachloride gas reacts with solid magnesium metal producing solid silicon and solid magnesium chloride</em>.
The unbalanced formula equation including physical states is:
<em>SiCl₄(g) + Mg(s) → Si(s) + MgCl₂(s)</em>
Answer:
Mass of aluminium foil = 387.57_g
Explanation:
density of aluminium foil 2.70 g/cm³,
1_yd = 91.44_cm
1_in = 2.54_cm
Length of aluminum foil = 63.2_yd = 5779.008_cm
Width of aluminium foil = 11 in = 27.94_cm
Thickness of aluminium foil = 0.00035_in. = 0.000889_cm
Volume of aluminium foil = length × width × thickness = 5779.008_cm × 27.94_cm × 0.000889_cm = 143.54_cm^3
Mass of aluminium foil = (volume of aluminium foil) × (density of aluminium foil) = 143.54_cm³ × 2.70 g/cm³ = 387.57_g