Answer:
6. d, 7. a
Explanation:
6. Molarity is a number of moles solute in 1 L solution.
7. 1 L solution - 2.5 mol K2CO3
20 L - x mol K2CO3
x =20*2.5/1 = 50 mol K2CO3
Molar mass(KCO3) = M(K) + M(C) + 3M(O)= 39 +12 +3*16= 99 g/mol
99 g/mol *50 mol = 4950 g KCO3 Closest answer is A.
Actually KCO3 does not exist, in reality it should be K2CO3.
Answer:
22 cubic inches
Explanation:
We are given;
- Mass of titanium = 3.6 pounds
We are required to determine the volume of titanium in cubic inches
- We need to know the density of titanium;
Density of titanium = 4.51 g/cm^3
1 pound = 453.592 g
therefore, 3.6 pound = (3.6 × 453.592 g per pound)
= 1632.93 g
Therefore;
Volume = Mass ÷ density
= 1632.93 g ÷ 4.51 g/cm^3
= 362.069 cm³
But, 1 in³ = 16.387 cm³
Therefore;
Volume = 362.069 cm³ ÷ 16.387 cm³ per in³
= 22.095 in³
= 22 in³
Thus the volume of titanium is 22 cubic inches
Answer: density =3.377g/cm³
Explanation:
Density =( molecular weight × effective number of atoms per unit cell) / (volume of unit cell × avogadro constant)
D= (M ×n) /(V×A)
M= 137g/mol
n= 2 (For BCC)
V=a³ , where a= 4r/√3
a= (4×222)/√3
a=512.69pm
a= 512.69×10^-10cm
V= ( 512.69×10^-10)^3
V= 1.3476×10^-22cm³
D= (137×2)/(1.3476×10^-22 × 6.02^23)
D= 3.377g/cm³
Therefore the density of barium is 3.377g/cm³
In a rate law constant K(kt), Depends only on Temperature.
Answer: would be Temperature, if temperature is constant, then rate law is constant.
Hope that helps!!!
