In this problem, we need:
(1 gallon)=(6 pounds) or 1 = (
(1 quart)=(1/4 gallon) or (4 quarts)=(1 gallon) or 1 = (
(16 ounces)=(1 pound) or 1 =
We have:
1 quart
(1 quart)*1
(1 quart)*((1 gallon)/(4 quarts))
(1 quart)*((1 gallon)/(4 quarts))*((6 pounds)/(1 gallon))*((16 ounces)/(1 pound))
(1)*(1/4)*(6/1)*(16/1) ounces [note: gallons, quarts, pounds all cancel out]
24 ounces
Checking: If a gallon weighs 6 pounds, a quart weighs 1.5 pounds [that is, 6/4].
That's 24 [that is, 1.5*16] ounces. Yes.
Answer:
3.36 × 10^-19 J
Explanation:
From the formula;
E= hc/wavelength
h= 6.6 ×10^-34 Js
c= 3 × 10^8 ms-1
Wavelength= 589 ×10^-9 m
E= hc/ wavelength
E=6.6 ×10^-34 × 3 × 10^-8/ 589 ×10^-9
E= 3.36 × 10^-19 J
Answer:
1.Most metal oxides are insoluble in water but some of these (e.g. Na2O.
Explanation:
2.: (i) A hissing sound is observed.
1.ii) The mixture starts boiling and lime water is obtained.
Answer:
1.07×10²¹ molecules are needed to sound the alarm
Explanation:
Let's convert the mass of CO to moles, to determine the amount of molecules.
0.05 g . 1 mol / 28 g = 1.78×10⁻³ moles
Now we can determine the number of molecules with the NA
1 mol has 6.02×10²³ molecules
1.78×10⁻³ moles may have (1.78×10⁻³ . 6.02×10²³) / 1 = 1.07×10²¹ molecules