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Chemistry

Guest

Atoms are made up of subatomic particles. Which of the following

statements is true about subatomic particles? *

A) Electrons are negatively charged and are the heaviest subatomic particle.

B) Neutrons are completely responsible for the mass of the nucleus and have no charge.

C) The mass of a neutron nearly equals the mass of a proton.

D) Protons are positively charged and the lightest subatomic particle.

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Chemistry

Emilia Baxter

What is the mass of 2.50 * 1022 molecules of NaOH (Molar mass = 40.0 g/mol) ?

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Chemistry

Dawson Clements

Whenever a continuous bell alarm sounds in the Chemistry building:

a. evacuate the laboratory classroom and meet with your lab mates out in the hallway. b. pack up your belongings, evacuate, and gather outside the building in a predetermined area with lab mates.

c. evacuate the building immediately and gather outside the building in a predetermined area with other lab mates.

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Chemistry

Kasey Gentry

6. State the number of significant digits in each of the following measurements.

(a) 1.00 cm

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Chemistry

Koen Wall

How do you boil water less than 100

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Chemistry

Mila Pennington

What quantum numbers specify these subshells 5s 6p 4d?

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Chemistry

Guest

What is the molarity of sucrose if 150.0 g is dissolved in 250.0 mL of solution

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Chemistry

Reginald Thornton

What are sister chromatids

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Chemistry

Lola Williams

Valence electrons are responsiblefor the makeup of chemical properties of elements true or false

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Chemistry

Roselyn Knapp

For the reaction 6CO2 (g) + 6H2O (l) > C6H12O6 (s) + 6O2 (g), what mass, in grams, of glucose is produced from 3.00 moles of carbon dioxide?

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Chemistry

Lee Vazquez

Which of the following is a single-replacement reaction?

A. CaCl2 + Na2CO3 CaCO3 + 2NaCl

B. H2 + Cl2 2HCl

C. 2AgNO3 + Cu 2Ag + Cu (NO3) 2

D. CH4 + 2O2 CO2 + 2H2O

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Chemistry

Miguel Figueroa

Normal cellular pH has a hydrogen concentration of 3.98 x 10-8 M. what is the pH of a cell

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Chemistry

Logan Stuart

What is evaporation? Describe what happens at the molecular level during evaporation.

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Chemistry

Jayvion Yates

Write is the chemical formula for calcium and chlorine

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Chemistry

Andre Shea

Using EDTA as the titrant and a free metal in solution is called a direct titration. This can be measured using an indicator that changes color when the metal is no longer in solution. What are the other types of EDTA titrations that can be done and why would you choose to do one of those?

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