Chemistry

All new and solved questions in Chemistry category

1 answer

The reaction below shows potassium oxide being produced (KO2) by combining oxygen (O2) with potassium (K). The mass of potassium is

The reaction below shows potassium oxide being produced (KO2) by combining oxygen (O2) with potassium (K). The mass of potassium is 50 g and the mass of oxygen is 12 g. O2 + K KO2 What is the mass for the potassium oxide that was produced?...
4 answers

A solution of hydrochloric acid had a hydrogen ion concentration of 1.0 mol/dm3Water was added to the hydrochloric acid until the

A solution of hydrochloric acid had a hydrogen ion concentration of 1.0 mol/dm3 Water was added to the hydrochloric acid until the pH increased by 1 What was the hydrogen ion concentration of the hydrochloric acid after water had been added?...
3 answers

If H and Cl are bonded, which atom has a stronger pull on the electrons? How do you know?

If H and Cl are bonded, which atom has a stronger pull on the electrons? How do you know?...
3 answers

How is plasma different from a gas?O plasma can be manipulated bymagnetic fieldO gas can be controlled by electricfieldgas

How is plasma different from a gas? O plasma can be manipulated by magnetic field O gas can be controlled by electric field gas is considered a state of matter while plasma is not...
4 answers

Boron oxide (B2O3) decomposes into boron (B) and oxygen gas (O2). What will the ratio of boron and oxygen atoms be? Complete the reaction

Boron oxide (B2O3) decomposes into boron (B) and oxygen gas (O2). What will the ratio of boron and oxygen atoms be? Complete the reaction and balance it so you can determine the ratio in the products....
4 answers

A 1.37m solution of citric acid ( H3C6H3O7) in water has a density of 1.10g/ cm3Calculate the mass percent, morality and mole fraction

A 1.37m solution of citric acid ( H3C6H3O7) in water has a density of 1.10g/ cm3 Calculate the mass percent, morality and mole fraction of the citric acid...
4 answers

When a substance undergoes a chemical change it is no longer the same but ab n___ s.

When a substance undergoes a chemical change it is no longer the same but a b n___ s....
9 answers

Pasagutan po please :)

Pasagutan po please :) [tex]Pasagutan po please :)[/tex]...
3 answers

Deduce the total rate change of momentum in a cylindrical shape object

Deduce the total rate change of momentum in a cylindrical shape object...
4 answers

Hey who wants to be my gurl friend

Hey who wants to be my gurl friend...
4 answers

9. In standardizing roughly 0.05M H, SO, solution,1.325g of pure an hydrous sodiumcarbonate were made up to 250cm' and 25cm' of

9. In standardizing roughly 0.05M H, SO, solution,1.325g of pure an hydrous sodium carbonate were made up to 250cm' and 25cm' of the solution needed 23.5 cm of the acid. Calculate the concentration of the acid in gom*. If 906cm? of the acid were left after the titration, how many cm' of water must...
4 answers

If an electron is lost, the atom will no longer be neutral. What will happen to the valence electron of Na and what will it form?

If an electron is lost, the atom will no longer be neutral. What will happen to the valence electron of Na and what will it form? What will the resulting charge be?...
4 answers

14.25cm° of a solution of NaOH and KOH containing 5g of solid perdm' required24.2cm} of 0.1M HCl for neutralization. Calculate

14.25cm° of a solution of NaOH and KOH containing 5g of solid perdm' required 24.2cm} of 0.1M HCl for neutralization. Calculate the concentration of each compound in gom3 of the solution. (Ans 1.052, 3.948)...
4 answers

Question 71How many neutrons do you need to add to the orbit to make a stable fluorine atom?

Question 7 1 How many neutrons do you need to add to the orbit to make a stable fluorine atom?...
4 answers

A system suffers an increase in internal energy of 102 J and at the same time the has in the system is compressed from 517 ml to 276

A system suffers an increase in internal energy of 102 J and at the same time the has in the system is compressed from 517 ml to 276 ml by a constant external pressure of 3.9 atm. what is the heat change of the system...
4 answers

An emission spectrum for an unknown element has one blue line and one green line againsta black background.

An emission spectrum for an unknown element has one blue line and one green line against a black background....
4 answers

What compound will form when Mg and F combine? Based on electronegativity, what type of bond will form?

What compound will form when Mg and F combine? Based on electronegativity, what type of bond will form?...
3 answers

Meeting ID: 827 6359 1349Passcode: w95QB3boys only

Meeting ID: 827 6359 1349 Passcode: w95QB3 boys only...
3 answers

Find the mole ratio of H2SO4 and H20 in the equation Fe2O3 + H2SO4 → Fe2(SO4)3 + H20.

Find the mole ratio of H2SO4 and H20 in the equation Fe2O3 + H2SO4 → Fe2(SO4)3 + H20....
4 answers

Who wants to be my gurl

Who wants to be my gurl...

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