Answer:
a) quantitative
b) qualitative
c) quantitative
d) qualitative
e) quantitative
Explanation:
a) it is a quantitative statement, since it uses the concepts of limits and aproxximation in the calculation to give its estimate.
b) it's a qualitative statement, beacause its an appreciation of someone who thinks that one's work ist better than another's.
c) it is a quantitative statement, since it is an expression that is mathematically demonstrated,
d) it's a qualitative, beacuse it'a a simple opinion of someone.
e) it is a quantitative statement, since this expression is demonstrated in real life and helps to save
Answer:
<h3>The answer is 1.03 g/cm³</h3>
Explanation:
The density of a substance can be found by using the formula

1 kg = 1000 g
2.06 kg = 2060 g
1 L = 1000 cm³
2 L = 2000 cm³
mass = 2060 g
volume = 2000 cm³
We have

We have the final answer as
<h3>1.03 g/cm³</h3>
Hope this helps you
Answer:
ΔH°r = -184.6 kJ
Explanation:
Let's consider the following balanced equation.
H₂(g) + Cl₂(g) ⇄ 2 HCl(g)
We can calculate the standard enthalpy of the reaction (ΔH°r) using the following expression:
ΔH°r = ∑np . ΔH°f(p) - ∑nr . ΔH°f(r)
where,
ni are the moles of reactants and products
ΔH°f(p) are the standard enthalpies of formation of reactants and products
By definition, the standard enthalpy of formation of a simple substance in its most stable state is zero. Then,
ΔH°r = 2 mol × ΔH°f(HCl(g)) - [1 mol × ΔH°f(H₂(g)) + 1 mol × ΔH°f(Cl₂(g))]
ΔH°r = 2 mol × (-92.3 kJ/mol) - [1 mol × 0 + 1 mol × 0]
ΔH°r = -184.6 kJ
Answer:
The answer to your question is: 0.373 g
Explanation:
Data
mass = ? g
atoms = 3 x 10 ²¹
AM = 74.92 g
Process
1 mol of As ------------------ 6.023 x 10²³ atoms
x ------------------ 3 x 10 ²¹ atoms
x = 4.98 x 10⁻³ moles
1 mol ------------------------ 74.92 g
4.98 x 10⁻³ moles------- x
x = (4.98 x 10⁻³ x 74.92)/1
x = 0.373 g of As
Answer: The correct answer is: the water can transfer heat to your arm more quickly than the air.
Explanation: The heat is transferred from the air or water to your arm through convection. The convective heat transfer coefficient of water is higher than the air's, so, even though the temperature of boiling water is lower, the heat will be transferred more efficiently to the other surface, in this case, the hand.