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Round to 4 significant figures 4,567,985

Francesco Cristallo asked Oct 3, 2024

by Francesco Cristallo

7.9k points

2 answers

3 votes

97.9k views

What is the value of ΔG for a solution of nitrous acid in which pH=1.30, [NO₂⁻]= 6.0×10⁻⁴ M and [HNO₂]=0.25 M? Hint: non-standard conditions!

Massquote asked Oct 3, 2024

by Massquote

8.2k points

1 answer

5 votes

52.2k views

How many electrons are in an atom that has (the atom) these quantum numbers (n=2 ,l=1 ,m(s)=-1)?

Mynawaz asked Oct 3, 2024

by Mynawaz

8.3k points

1 answer

3 votes

82.5k views

How much energy is lost by a 348g iron statue that goes from a temperature of 299 K to a temperature of 280 K?

Stratovarius asked Oct 3, 2024

by Stratovarius

8.0k points

1 answer

5 votes

95.9k views

Identify the chemical and physical changes discussed in the following 2 paragraphs by circling them and writing either a "C" for chemical and "P" for physical changes. Sodium is silver-white and soft.

Trimax asked Oct 3, 2024

by Trimax

8.7k points

1 answer

3 votes

110k views

Explain why the boiling points increase from HCl through HBr to HI.

Skate To Eat asked Oct 3, 2024

by Skate To Eat

8.3k points

1 answer

4 votes

178k views

In this module, you will again need to calculate percent yields. imagine that your calculated theoretical yield of soap from canola oil is 83.71 g and after you ran the reaction and isolated your product

Jml asked Oct 3, 2024

by Jml

7.7k points

1 answer

0 votes

13.5k views

If the heat of fusion for water is 80. cal/g, how many calories are needed to melt 45.0 g of ice at 0 °C? 1) 3.6 cal 2) 3.6 x 10³ cal 3) 1.8 cal 4) 80. cal 5) 0.56 cal

Yedpodtrzitko asked Oct 3, 2024

by Yedpodtrzitko

7.9k points

1 answer

5 votes

221k views

Which combinations of errors will result in the smallest density? a.Mass+0.1 g /Volume+0.1 mL b.Mass+0.1 g /Volume-0.1 mL c.Mass-0.1 g /Volume-0.1 mL d.Mass-0.1 g /Volume 101 mL

Jakob Olsen asked Oct 3, 2024

by Jakob Olsen

8.8k points

1 answer

4 votes

46.5k views

A. What evidence have you discovered to explain why climate, natural resource availability, and the economic conditions of a region limit the production and uses of synthetic materials, such as the ones

Bobby StJacques asked Oct 3, 2024

by Bobby StJacques

8.4k points

1 answer

4 votes

225k views

A hot air balloon has a volume of 3100 m to the third at 91 degrees Celsius what is the volume if the air cools to 86 degrees Celsius

Drpawelo asked Oct 3, 2024

by Drpawelo

8.5k points

1 answer

1 vote

171k views

Which element has atoms in the ground state with the greatest number of valence electrons? a) Oxygen (O) b) Chlorine (Cl) c) Fluorine (F) d) Nitrogen (N)

YaOzI asked Oct 3, 2024

by YaOzI

7.5k points

1 answer

0 votes

185k 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)

Oscar Mateu asked Oct 3, 2024

by Oscar Mateu

7.3k points

1 answer

0 votes

197k views

Which one of the following elements forms two or more ions with different ionic charges? A) F B) K C) Fe D) Ca E) O

Abolfazl Miadian asked Oct 3, 2024

by Abolfazl Miadian

8.4k points

1 answer

3 votes

15.3k views

A sample of a compound containing only carbon and hydrogen atoms is completely combusted, producing 66.0 g of CO₂ and 36.0 g of H₂O. What is the empirical formula of the compound? 1) CH₂ 2) C₂H₄ 3) C₃H6

Nakul Sudhakar asked Oct 3, 2024

by Nakul Sudhakar

7.4k points

1 answer

2 votes

235k views

What type of reaction causes calcium hydroxide to turn pink after phenolphthalein is added? A) Acid-base neutralization B) Oxidation-reduction C) Combustion D) Precipitation

Kiya asked Oct 3, 2024

by Kiya

8.6k points

1 answer

2 votes

169k views

What are the three physical states that toxic industrial materials can exist in?

Keith Rousseau asked Oct 3, 2024

by Keith Rousseau

8.3k points

1 answer

3 votes

126k views

Reclaimed refrigerant must be tested to meet ________ before it can be resold. a) ASHRAE standards b) ASTM standards c) EPA regulations d) AHRI-700 standards

Altherius asked Oct 3, 2024

by Altherius

7.5k points

1 answer

0 votes

64.1k views

Iron rusts over time, but gold does not. Which property of iron and gold best explains this difference? A. Color B. Conductivity C. Reactivity D. Magnetism SUBMIT

Cnmuc asked Oct 3, 2024

by Cnmuc

8.5k points

1 answer

0 votes

50.6k views

When using optical methods of measuring PO2, such as phosphorescence or fluorescence quenching, the __the PO2 is in the sensor, the __the phosphorescence or fluorescence. A) Higher, lower B) Lower, higher

Miojamo asked Oct 3, 2024

by Miojamo

8.3k points

1 answer

5 votes

49.7k views

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