4) Calculate the percentage by mass of oxygen in Pb(NO3)2 A) 193 B20 145

Chemistry

1 answer:

Ierofanga [76]2 years ago

5 0

Answer:

im getting 331.23

Explanation:

Element Number Mass Percet Composition

O 6 16.00 28.9828819853274

N 2 14.01 8.45937867946744

Pb 1 207.21 62.5577393352051

You might be interested in

Answer the question below based on the periodic table entry for iron.

denis23 [38]

The atomic number is usually shown at the top of the element (on periodic table)

(I’ve attached an image for you to understand visually)

Answer: 26

4 0

3 years ago

The Temperature of the earth gets______ as you get closer to the _______ and ________ as you move towards the_____

bulgar [2K]

The temperature of the earth gets HOTTER as you get closer to the CORE and COOLER as u move toward the SURFACE.

4 0

3 years ago

What are the names of the 2 products when zinc reacts with hydrochloric acid?

serious [3.7K]

Faiebfjendicidncnj udnsicy

7 0

3 years ago

How does the difference in electronegativity values determine the type of bond that occurred? Ionic or covalent

Alenkasestr [34]

The more electronegativity atom attracts electrons more strongly and gains a slightly negative charge, the less electronegative atom has a slightly positive charge.

8 0

4 years ago

Enter your answer in the provided box.S(rhombic) + O2(g) → SO2(g) ΔHo rxn= −296.06 kJ/molS(monoclinic) + O2(g) → SO2(g) ΔHo rxn=

IgorC [24]

Answer: $\Delta H^0=+0.3kJ/mol$ .

Explanation:

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

$S_{rhombic}+O_2(g)\rightarrow SO_2(g)$ $\Delta H^0_1=-296.06kJ$ (1)