01/17/19

If Armando checks his pulse for 2 minutes, what is his rate if he counts 156 beats?
Follows • 0
Expert Answers •1

01/17/19

25% of what number is 9
Follows • 1
Expert Answers •1

01/17/19

Help me I don’t understand
What is the density in g/cm3 of an object weighing 9.6 g that is placed in a graduated cylinder displacing the volume from 10.0 ml to 13.2ml?
Follows • 1
Expert Answers •1

01/17/19

how do i set this up?
the sum of two times a number and four
Follows • 1
Expert Answers •1

01/16/19

Sodium and potassium ions move in and out of the axon when the membrane is
Follows • 1
Expert Answers •1

01/16/19

consider 0.036ml HCl dissolved in 100ml of solution. calculate the percent concentration (w/w %)
Follows • 1
Expert Answers •1

01/16/19

what is (4.5 x 10^7) ^2? Please answer in scientific notation :)
the carrot symbol represents an exponent
Follows • 1
Expert Answers •1

01/16/19

A series of six to nine consecutive histidine residues can bind to immobilized metals such as nickel (Ni).

The purification of a protein containing six histidines at its C-terminus using a nickel-based resin would be achieved by _____ chromatography. size exclusion. cation exchange. anion... more
Follows • 1
Expert Answers •1

01/16/19

If Hershey and Chase had found 35S in both the pellet and the supernatant of the phage-infected bacterial culture, what would have been the most plausible conclusion?
The experiment would have been inconclusiveProtein must be the genetic material.DNA must contain sulfur.The bacteria were not infected with phageThe genetic information molecule definitely contains... more
Follows • 1
Expert Answers •1

01/16/19

How to prepare 4L of 0.02 M KMnO4?
Please explain every step. Thank you.
Follows • 1
Expert Answers •1

01/16/19

How many liters of NH₃, at STP, will react with 8.5 g O₂ to form NO₂ and water?
Follows • 0
Expert Answers •1

01/16/19

Each of the following could result in the misfolding of a protein except _____.
the addition of a chaperone protein. a change of solvent from water to benzene. an increase in temperature to 100°C. a rapid change to a solvent at pH 12. the addition of 6M HCl, a strong acid.
Follows • 1
Expert Answers •1

01/16/19

Ionic interactions could occur between which of the following amino acids as part of a protein’s tertiary structure?
Two cysteines.Tryptophan and valine.Glutamic acid and arginine.Histidine and lysine.Serine and threonine.
Follows • 1
Expert Answers •1

01/16/19

Aspartic acid and glutamatic acid can form hydrogen bonds with water because they _____.
have phosphate groups in their side chains.have nonpolar, hydrophobic side chains.have polar, uncharged sided chains.have electrically charged side chains.have sulfhydryl groups in their side chains.
Follows • 1
Expert Answers •1

01/16/19

Bromine combines with nitrogen to produce nitrogen tribromide
Follows • 1
Expert Answers •1

01/16/19

Chemical dilution
Calculate the molarity of an H3PO4 solution prepared as follows: 5.00 mL of 10.0 M phosphoric acid is diluted to 250.0 mL in a volumetric flask, and from this flask 25.00 mL of this solution is... more
Follows • 1
Expert Answers •2

01/16/19

What is the name for N2O3
Follows • 1
Expert Answers •1

01/15/19

How many liters of CO2 are produced when 2 L of C3H7OH react with 4 L of oxygen at 50 degrees Celsius under 1 atm of pressure?
I know how to solve gas Stoichiometry problems but I don't know how that changes at different temperatures and pressures.
Follows • 1
Expert Answers •1

01/15/19

Chemistry problem?
Two grams of salt A were added to 50 mL of water. The initial and final temperatures were recorded (see table). In a separate experiment, 2 grams of salt B were added to 50 mL of water and its... more
Follows • 1
Expert Answers •1

01/15/19

Need help with 2 AP chem questions.
Q1: A piece of magnesium was added to excess HCL at 725 mm Hg and 28.0°C. If 38.0 mL of hydrogen was collected over 20.0°C water, what is the mass of the magnesium?Q2: In the reaction Mg(s) +... more
Follows • 1
Expert Answers •1

01/15/19

Living systems. The question is in the description.
Special cells in the body are responsible for gathering information about the body's environment. These cells are called receptor cells. The information gathered by receptor cells is encoded as... more
Follows • 1
Expert Answers •1

01/14/19

The limiting reagent does not stop the reaction.
True or false? I'm stuck on this.
Follows • 1
Expert Answers •1

01/14/19

The reactant that is left over is the excess reactant
True or False??? I'm not sure
Follows • 1
Expert Answers •1

01/14/19

How many liters are there in 3 moles of co2 gas?
Follows • 1
Expert Answers •1

01/14/19

Molality of an aqueous solution that produces an elevation of boiling point of 1.00 K at 1 atm pressure. Kb for water is 0.512Kkgmol−1
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.