Recent questions in Chemistry

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Calculate the density of potassium .

Anna Vlasenko asked Oct 1, 2024

by Anna Vlasenko

8.1k points

1 answer

2 votes

160k views

on the basis of this experiment how would you proceed to determine the percentage of copper in a penny

Kevin McTigue asked Oct 1, 2024

by Kevin McTigue

7.9k points

1 answer

3 votes

51.7k views

Why not combine bolus fluids with dextrose?

Gaston Sanchez asked Oct 1, 2024

by Gaston Sanchez

8.6k points

1 answer

2 votes

220k views

Gloves should be removed A. Before Lab coat B. After Mask C. After lab coat D. When labeling tubes

Tobloef asked Oct 1, 2024

by Tobloef

8.1k points

1 answer

1 vote

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When aqueous solutions of FeCₗ3 and (NH₄)₂S are mixed, a solid precipitate forms. What is the correct formula for the precipitate?

Fitzchak Yitzchaki asked Oct 1, 2024

by Fitzchak Yitzchaki

7.9k points

1 answer

0 votes

136k views

which statements about titration curves are correct? select all that apply: the ph at the equivalence point of the titration of a strong acid with a strong base is 7.00. the ph at the equivalence point

AdrieanKhisbe asked Oct 1, 2024

by AdrieanKhisbe

7.6k points

1 answer

2 votes

48.3k views

A sample of ethane has the same mass as 10.0 million molecules of methane. How many C₂H₆ molecules does the sample contain?

Mateor asked Oct 1, 2024

by Mateor

8.2k points

1 answer

5 votes

220k views

*for a person weighing 150 pds, how many L of H2O are contained in all of the body's compartments* a. 70 b. 50 c. 42 d. 14

Chuckrector asked Oct 1, 2024

by Chuckrector

7.5k points

2 answers

3 votes

14.6k views

Solutions A and B are separated by a membrane that is permeable to Ca₂⁺ and impermeable to Cl⁻. Solution A contains 10mM CaCl₂, and solution B contains 1 mM CaCl₂. Assuming that 2.3 RT/F = 60 mV, Ca₂⁺

Pavan Kemparaju asked Oct 1, 2024

by Pavan Kemparaju

8.3k points

1 answer

4 votes

89.0k views

Consider the reaction 6CO2(g) + 6H2O(I)-->C6H12O6 + 602(g) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 2.36 moles of CO2(g) react at standard conditions.

Shivam Pokhriyal asked Oct 1, 2024

by Shivam Pokhriyal

8.0k points

1 answer

1 vote

443 views

9) a) When the temperature stays the same, the volume of a gas varies inversely to the pressure of the gas. Write an equation to express this variation, using k for the constant of variation. b) When a

Syed Saad asked Oct 1, 2024

by Syed Saad

8.1k points

1 answer

2 votes

116k views

A molecule can be depicted in multiple projections and orientations. For each depiction to be equivalent, all atoms within the molecule must be in: A) The same plane. B) A linear arrangement. C) A tetrahedral

Xephryous asked Oct 1, 2024

by Xephryous

8.1k points

1 answer

1 vote

16.3k views

Which of the following is FALSE regarding potassium secretion? 1) Hyperkalemia will increase K⁺ secretion 2) Increased activity of the Na/K pump will increase K⁺ secretion 3) It is paired with sodium reabsorption

FocusedWolf asked Oct 1, 2024

by FocusedWolf

8.2k points

1 answer

0 votes

151k views

Noble gas notations help you write the electron configuration of every element. Benefits are: a) Simplifies writing electron configurations b) Saves time c) Provides a clear pattern d) All of the above

Mkj asked Oct 1, 2024

by Mkj

7.9k points

1 answer

5 votes

153k views

A 3.00 g sample of a gaseous compound was found to contain 2.560g of carbon and 0.440g of hydrogen. What is the simplest formula for the compound? a. CH₂ b. C₂H₅ c. C₃H₇ d. C₄H₁₀

Magan asked Oct 1, 2024

by Magan

7.7k points

1 answer

0 votes

50.4k views

the cs-131 nuclide has a half-life of 30 years. after 120 years, 6.0 g remain. what is the original mass of the cs-131 sample in grams?

TJ Thind asked Oct 1, 2024

by TJ Thind

7.1k points

1 answer

3 votes

90.0k views

If we lower the number of air particles surrounding the barely inflated balloon as we activate the vacuum pump, Then the particles of air in the balloon will:

Srikanth Kolli asked Oct 1, 2024

by Srikanth Kolli

7.9k points

2 answers

1 vote

49.0k views

By studying fossils, scientists have learned that A. both animals and plants have changed over time. B. animals have changed over time, but plants have not. C. plants have changed over time, but animals

Jjazzboss asked Oct 1, 2024

by Jjazzboss

9.0k points

1 answer

3 votes

216k views

2) what mass of oxygen is needed to react with 184 g of sodium? 4na + o_{2} -> 2n*a_{2}*o

Andrei Shikalev asked Oct 1, 2024

by Andrei Shikalev

8.4k points

1 answer

3 votes

147k views

Hartmann's is a colloid solution. a) True b) False

Robert Mutke asked Oct 1, 2024

by Robert Mutke

8.8k points

1 answer

3 votes

35.3k views

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