Which of the following statement is correct about heavy water.
(a) Its molar mass is 20 g mol-1.
(b) It is obtained by repeated electrolysis of water. (c) Its density is maximum at 40 C.
(d) Its density is maximum at 11.4 0C.
Answers
Answer:
Simplifying
(5x + -7)(3x + -4) = 0
Reorder the terms:
(-7 + 5x)(3x + -4) = 0
Reorder the terms:
(-7 + 5x)(-4 + 3x) = 0
Multiply (-7 + 5x) * (-4 + 3x)
(-7(-4 + 3x) + 5x * (-4 + 3x)) = 0
((-4 * -7 + 3x * -7) + 5x * (-4 + 3x)) = 0
((28 + -21x) + 5x * (-4 + 3x)) = 0
(28 + -21x + (-4 * 5x + 3x * 5x)) = 0
(28 + -21x + (-20x + 15x2)) = 0
Combine like terms: -21x + -20x = -41x
(28 + -41x + 15x2) = 0
Solving
28 + -41x + 15x2 = 0
Solving for variable 'x'.
Factor a trinomial.
(4 + -3x)(7 + -5x) = 0
Subproblem 1
Set the factor '(4 + -3x)' equal to zero and attempt to solve:
Simplifying
4 + -3x = 0
Solving
4 + -3x = 0
Move all terms containing x to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + -3x = 0 + -4
Combine like terms: 4 + -4 = 0
0 + -3x = 0 + -4
-3x = 0 + -4
Combine like terms: 0 + -4 = -4
-3x = -4
Divide each side by '-3'.
x = 1.333333333
Simplifying
x = 1.333333333
Explanation:
Answer:Simplifying
(5x + -7)(3x + -4) = 0
Reorder the terms:
(-7 + 5x)(3x + -4) = 0
Reorder the terms:
(-7 + 5x)(-4 + 3x) = 0
Multiply (-7 + 5x) * (-4 + 3x)
(-7(-4 + 3x) + 5x * (-4 + 3x)) = 0
((-4 * -7 + 3x * -7) + 5x * (-4 + 3x)) = 0
((28 + -21x) + 5x * (-4 + 3x)) = 0
(28 + -21x + (-4 * 5x + 3x * 5x)) = 0
(28 + -21x + (-20x + 15x2)) = 0
Combine like terms: -21x + -20x = -41x
(28 + -41x + 15x2) = 0
Solving
28 + -41x + 15x2 = 0
Solving for variable 'x'.
Factor a trinomial.
(4 + -3x)(7 + -5x) = 0
Subproblem 1
Set the factor '(4 + -3x)' equal to zero and attempt to solve:
Simplifying
4 + -3x = 0
Solving
4 + -3x = 0
Move all terms containing x to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + -3x = 0 + -4
Combine like terms: 4 + -4 = 0
0 + -3x = 0 + -4
-3x = 0 + -4
Combine like terms: 0 + -4 = -4
-3x = -4
Divide each side by '-3'.
x = 1.333333333
Simplifying
x = 1.333333333
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Explanation: