Chemistry

All new and solved questions in Chemistry category

4 answers

A sample of neon gas at a pressure of 1.16 atm and a temperature of 25.9 °C, occupies a volume of 697 mL. If the gas iscompressed

A sample of neon gas at a pressure of 1.16 atm and a temperature of 25.9 °C, occupies a volume of 697 mL. If the gas is compressed at constant temperature until its pressure is 1.55 atm, the volume of the gas sample will be—-...
6 answers

What is conduction ??

What is conduction ??...
4 answers

Identify the equations that show ionization. Check all that apply.

Identify the equations that show ionization. Check all that apply....
4 answers

A calculate the mass of Hydrogen in a barton 10m in diameter filled with hydrogen gas at a pressure of 180mmHg and a temperature of

a calculate the mass of Hydrogen in a barton 10m in diameter filled with hydrogen gas at a pressure of 180mmHg and a temperature of 27°C....
4 answers

URGENT How many sig figs after solving 107 + 16

URGENT How many sig figs after solving 107 + 16...
3 answers

Answer I need help please it’s hard

Answer I need help please it’s hard [tex]Answer I need help please it’s hard[/tex]...
8 answers

Lab: Density of Solids Assignment: Lab Report

Lab: Density of Solids Assignment: Lab Report...
4 answers

Two naturally occurring isotopes of aluminum exist, Al-26 and Al-27. Aluminum's atomic mass is -26.98 u. What can you conclude about

Two naturally occurring isotopes of aluminum exist, Al-26 and Al-27. Aluminum's atomic mass is -26.98 u. What can you conclude about the relative abundance of each isotope?...
3 answers

Calcium can lose more than one valence electron. What does this enable?

Calcium can lose more than one valence electron. What does this enable?...
4 answers

In a minimum of 5 sentences, discuss what you learned from the aluminum can demonstration.

In a minimum of 5 sentences, discuss what you learned from the aluminum can demonstration....
4 answers

The experiment was repeated with 25 cm of 0.2 mol/dm sodium thiosulfate and 25 cm of water. a Typical results for this experiment

The experiment was repeated with 25 cm of 0.2 mol/dm sodium thiosulfate and 25 cm of water. a Typical results for this experiment and a further two experiments are given in the table. Experiment 2 3 4 1 Volume of thiosulfate/cm3 50 10 40 25 Volume of water/cm 0 10 25 40 Volume of acid / cm 5 5 5 5 0...
4 answers

Now that we see that Mg loses 2 valence electrons an S gains 2 electrons, which is oxidized and which is reduced? (remember OIL RIG).

Now that we see that Mg loses 2 valence electrons an S gains 2 electrons, which is oxidized and which is reduced? (remember OIL RIG). Which is the reducing agent and which is the oxidizing agent?...
3 answers

Classify the first 30 elements into groups of metals non-metals and metalloids

Classify the first 30 elements into groups of metals non-metals and metalloids...
4 answers

A and b and c

A and b and c...
3 answers

Choose the atom with:a) Higher first ionization energyLi and Fb) Larger atomic radiusNa andoc) Higher electronegativityLi

Choose the atom with: a) Higher first ionization energy Li and F b) Larger atomic radius Na ando c) Higher electronegativity Li and F...
4 answers

The neutralization reaction isH3PO4(aq) + 3 NaOH(aq)>3 H2O(l) + Na3PO4 (aq)What is the concentration of the unknown H3PO,

The neutralization reaction is H3PO4(aq) + 3 NaOH(aq) > 3 H2O(l) + Na3PO4 (aq) What is the concentration of the unknown H3PO, solution? [tex]The neutralization reaction is H3PO4(aq) + 3 NaOH(aq) > 3 H2O(l) + Na3PO4 (aq) What is the con[/tex]...
4 answers

The student used:2g of copper oxide (in excess)25cm^3 of a solution of dilute sulfuric acid with a concentration of 49 g/dm^3Relative

The student used: 2g of copper oxide (in excess) 25cm^3 of a solution of dilute sulfuric acid with a concentration of 49 g/dm^3 Relative atomic masses: Cu = 63.5 O = 16 Relative formula mass of sulfuric acid = 98 Determine by how many moles the copper oxide (CuO) was in excess. Please help!!!...
4 answers

Calculate the density of xenon gas at a pressure of 753 mmHg and a temperature of 43 ºC.Express the density to three significant

Calculate the density of xenon gas at a pressure of 753 mmHg and a temperature of 43 ºC. Express the density to three significant figures and include the appropriate units....
4 answers

A sample of uranium oxide contains uranium and oxygen. It is determined that there are 2.5 grams of uranium in a 500g sample. What

A sample of uranium oxide contains uranium and oxygen. It is determined that there are 2.5 grams of uranium in a 500g sample. What percent of the compound is uranium?...
8 answers

How many hydrogen atoms are in one molecule of thecompound C12H22011?

How many hydrogen atoms are in one molecule of the compound C12H22011?...

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