Recent questions in Chemistry

Question

Study the models below. In the models, different colors represent different types of atoms. Which models show an element? a) Model 1 only b) Model 2 only c) Both Model 1 and Model 2 d) Neither Model 1

James Robinson asked Oct 15, 2024

by James Robinson

8.5k points

1 answer

2 votes

28.9k views

When testing for the presence of bromate (in bread) what is the acid used and why? a) Hydrochloric acid; to neutralize bromate ions. b) Acetic acid; to enhance the reaction with bromate. c) Sulfuric acid;

Henry Brown asked Oct 15, 2024

by Henry Brown

8.1k points

1 answer

5 votes

197k views

A laboratory high-vacuum system may operate at 1.0 x 10 -5 mm Hg. What is this pressure in pascals? Pls help before I cry

Flovilmart asked Oct 15, 2024

by Flovilmart

7.9k points

1 answer

3 votes

54.2k views

Which of the following statement(s) regarding the quantum numbers that identify an atomic orbital are correct? a. The angular momentum quantum number, l, can have integer values between zero and (n−1)

Arvind asked Oct 15, 2024

by Arvind

7.4k points

1 answer

2 votes

1.1k views

The recommended minimum level of Acid Detergent Fiber in diets of high producing cows is 19% on a dry matter basis.

Andrey Chaschev asked Oct 15, 2024

by Andrey Chaschev

7.5k points

1 answer

1 vote

38.1k views

What sub levels fit in the 3rd PEL

Albaregar asked Oct 15, 2024

by Albaregar

8.5k points

1 answer

2 votes

133k views

Elongation Step 2: The catalytic activity necessary to for this bond formation is a property of the _ in the large subunit of the ribosome; therefore this _ acts as a _ (note that this is a _ acting as

Markive asked Oct 15, 2024

by Markive

8.3k points

1 answer

1 vote

61.5k views

If 2750. grams of octane (approx. 1 gallon) react with excess oxygen, how much carbon dioxide is produced? You can assume that only carbon dioxide and water are formed in the combustion reaction. Please

Pabigot asked Oct 15, 2024

by Pabigot

7.9k points

1 answer

2 votes

153k views

Which of the following reagents will selectively oxidize an aldose to an aldonic acid? A. Uv Light B. Ag2O in NH4OH C. FeCl3 D. HNO3

Nogusta asked Oct 15, 2024

by Nogusta

7.7k points

1 answer

1 vote

100k views

Use the equation pH=−log(H + ), where H + is the hydrogen ion concentration of a solution. Find the pH of a baking soda solution for which the hydrogen ion concentration is 2.43 ✕ 10^−3. (Round to the

Qamil asked Oct 15, 2024

by Qamil

7.3k points

1 answer

5 votes

198k views

The vapor pressure of ethanol is 58.7 torrat 25 °C. Determine the vapor-pressure lowering. AP, of an ethanol solution that contains 0.125 mol sucrose dissolved into 1.545 mol ethanol. A. 0.925 torr B.

Jaydeep Namera asked Oct 15, 2024

by Jaydeep Namera

7.9k points

1 answer

0 votes

163k views

Which dosage form is a semisolid oil-in-water emulsion? a) Cream b) Ointment c) Gel d) Lotion

Steve Wilhelm asked Oct 15, 2024

by Steve Wilhelm

8.2k points

1 answer

4 votes

89.3k views

S(s) +2CO(g)—->SO2(g)+2C(s)+76kJ Is the reaction exothermic or endothermic based on the equation in the relative number of moles

Zronn asked Oct 15, 2024

by Zronn

8.2k points

1 answer

0 votes

170k views

I WILL GIVE 35 POINTS TO THOSE WHO FILL IN THE BLANKS CORRECTLY NOOOO SCAMS PLEASE

Ujjwal Kaushik asked Oct 15, 2024

by Ujjwal Kaushik

7.1k points

2 answers

5 votes

93.7k views

How are the celsius, kelvin, and fahrenheit scales similar? how are they different? considering ther differences, think of one scenario in which each scale is more convinienet to use A) The Celsius, Kelvin,

Onofrio asked Oct 15, 2024

by Onofrio

8.0k points

1 answer

3 votes

232k views

Scientists were actually able to predict a great deal about the behavior and structure of the element, livermorium (Lv), before discovering it. What most likely led to these predictions? a) An understanding

Zein Makki asked Oct 15, 2024

by Zein Makki

7.9k points

1 answer

3 votes

69.7k views

B why the others are true: A. Group 1 and 2 are metals and are basic C. 227°C true if looking at melting points

MaltMaster asked Oct 15, 2024

by MaltMaster

7.4k points

1 answer

0 votes

225k views

In paper chromatography, why is a pencil used to mark the application point instead of a pen? a) Pens dissolve in solvents b) Pencil marks are more visible c) Pens create uneven lines d) Pencil marks don't

Mohammad AbuShady asked Oct 14, 2024

by Mohammad AbuShady

7.8k points

1 answer

5 votes

171k views

Explain why carbon is called ""the backbone"" molecule of organic chemistry and why organic molecules couldn't easily be based on h or o instead.

Neezer asked Oct 14, 2024

by Neezer

7.7k points

1 answer

4 votes

3.7k views

One way in which an enzyme can lower the activation energy required for a reaction is to bind the substrate(s) and distort its structure so that the substrate more closely resembles the transition state

Valerica asked Oct 14, 2024

by Valerica

8.1k points

1 answer

1 vote

56.2k views

Page:

« prev
1
...
814
815
816
817
818
819
820
...
1000
...
next »

Ask a Question

Recent questions in Chemistry

Other Questions