Rank the elements from smallest to largest electronegativitu (smallest at top)

Chemistry

1 answer:

Lorico [155]3 years ago

8 0

Ne is the smallest
B is the biggest
It goes (smallest to largest) : Ne, F,C,B

You might be interested in

What is the mass of potassium iodide (166.00 g/mol) that yields 0.500 g of lead(ii) iodide (461.0 g/mol) precipitate? (you must

timama [110]

the mass of potassium iodide is 0.360 g

calculation

step 1: write the balanced molecular equation

Pb(NO3)2 (aq) + 2 Ki (s)→ Pbi2(s) + 2KNO3

step 2 ; calculate the moles of Pbi2

moles = mass /molar mass

= 0.500 g / 461 .0 g/mol =0.0011 moles

step 3: use the mole ratio to calculate the moles of Ki

Ki: Pbi2 is 2:1 therefore the moles of ki = 0.0011 x 2/1 = 0.0022 moles

step 4 : find the mass of Ki

mass= moles x molar mass

=0.0022 moles x 166g/mol =0.365 g which is approximate 0.360 g

8 0

3 years ago

Hydrogen peroxide decomposes in presence of manganese (iv) oxide to give oxygen gas i). Draw a labelled diagram to show the volu

Effectus [21]

Answer:

Oxygen can be made from hydrogen peroxide, which decomposes slowly to form water and oxygen:

hydrogen peroxide → water + oxygen

2H2O2(aq) → 2H2O(l) + O2(g)

The rate of reaction can be increased using a catalyst, manganese(IV) oxide. When manganese(IV) oxide is added to hydrogen peroxide, bubbles of oxygen are given off.

Apparatus arranged to measure the volume of gas in a reaction. Reaction mixture is in a flask and gas travels out through a pipe in the top and down into a trough of water. It then bubbles up through a beehive shelf into an upturned glass jar filled with water. The gas collects at the top of the jar, forcing water out into the trough below.

To make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese(IV) oxide. The gas produced is collected in an upside-down gas jar filled with water. As the oxygen collects in the top of the gas jar, it pushes the water out.

Instead of the gas jar and water bath, a gas syringe could be used to collect the oxygen