ATDH- General Chemistry

0.40

A sample containing helium gas at 0.20 atm compresses so that its volume is halved at a constant temperature.
What is the new pressure in atmospheres?

Hydrogen Bonding

Which is the strongest attractive interaction in pure ethanol?

ionic bond

a type of chemical link formed through the electrostatic attraction between two oppositely charged ions

Mitochondrion

Which organelle is responsible for cellular respiration?

Helium

Which of the following is a noble gas?

noble gas

a chemical element in Group 18 of the periodic table

H2SO4

What is the formula for sulfuric acid?

4

Which is the maximum number of moles of CO2 that could be formed from 7 moles of CH4 and 8 moles of O2 by the reaction described?

CH4 + 2 O2 → CO2 + 2 H2O

(5.0) (2.0)/ (3.0)

How many L of 3.0 M NaCl is needed to make up a 5.0 L solution of 2.0 M

NaCl?

3.0

Which is the pH of a 0.001 M solution of HNO3?

Increasing the volume

Which change in the reaction shown below will lead to an increase in the

concentration of CO at equilibrium?

2 CO2(g) + heat ⇌ 2 CO(g) + O2(g)

2

How many electrons are in the valence shell of a monatomic ion of formula

Sn2+?

electrons

Negative (-1), which balances the positive charge of protons.

protons

Positive electric charge (+1e), equal and opposite to an electron.

10(100)/ (0.7)(1)(74)

A one liter solution of 0.7 M KCl (74 g/mol) is evaporated and 10 g of KCl are

recovered. Which is the percent recovery of KCl?

C

Which element has the highest electronegativity on the periodic table?

A) Sodium (Na)

B) Chlorine (Cl)

C) Fluorine (F)

D) Oxygen (O)

B

What is the dominant type of intermolecular force present between water (H2​O) molecules?

A) London dispersion forces

B) Hydrogen bonding

C) Ionic bonds

D) Dipole-induced dipole interactions

B

When the reaction CH4​+O2​→CO2​+H2​O is fully balanced using the lowest whole-number coefficients, what is the coefficient for O2​?

A) 1

B) 2

C) 3

D) 4

D (p1v1=p2v2)

A sample of gas occupies 2.0 L at a pressure of 1.0 atm. If the volume is compressed to 0.5 L at constant temperature, what is the new pressure? A) 0.25 atm

B) 0.5 atm

C) 2.0 atm

D) 4.0 atm

PV=nRT

ideal gas law

p1v1=p2v2

boyle gas law