Questions by Alexander Perechnev

Questions by Alexander Perechnev

Which of the following is an example of a chemical change? 25 points A. water evaporating B. carbon joining with oxygen to form carbon dioxide C. ice cream melting D. salt dissolving into water to form

asked Jun 7, 2021

2 answers

1 vote

227k views

What’s one advantage of electron microscopes

asked Jun 3, 2021

1 answer

4 votes

175k views

(04.05 MC) Which claim best supports the cycling of carbon through the hydrosphere? (2 points) A. The carbon dioxide from the atmosphere gets dissolved by the ocean and fish absorb it through their gills.

asked May 13, 2021

1 answer

5 votes

10.9k views

A man bought a mobile phone for $800 and sold it for $1000. What was his profit as a percentage of the cost price

asked Apr 2, 2021

2 answers

4 votes

197k views

Which of the following is an example of the atmosphere interacting with the biosphere? Plants obtain minerals and nutrients from the soil. Contaminants in lakes harm water plants and fish. Smoke in air

asked Mar 23, 2021

1 answer

2 votes

189k views

I need help with this!!!

asked Jan 9, 2021

1 answer

1 vote

60.4k views

Factor the polynomial completely. 6ax^-9x

asked Oct 25, 2020

1 answer

2 votes

23.8k views

The mass spectrum of an unknown compound has a molecular ion peak with a relative intensity of 57.10% and an M+1 peak of 6.83%. How many carbon atoms are in the compound? (Fill in an integer number)

asked Aug 7, 2020

1 answer

2 votes

91.3k views

19 Standard 7.4(D) -- Readiness 1 A bicycle shop designs a new gear system for their bikes. They use a 4-inch gear for bikes with a 22-inch wheel diameter. If the ratio of the gear to wheel diameter remains

asked Apr 8, 2020

1 answer

4 votes

191k views

Why are most plant cells long and tubelike? If you help me with this question I will follow you and be friends and try my best to help you when you need answers! PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE

asked Mar 17, 2020

2 answers

4 votes

159k views

The density of silver is 10.5 g/cm^3. What is the volume of a piece of Ag that contains 2.8 × 10^22 atoms?

asked Jan 12, 2020

1 answer

4 votes

121k views

Why are classical allegories not regarded as realistic fiction?

asked Jul 5, 2019

2 answers

5 votes

169k views

A population of rabbits in a snowy environment is made up of mostly white rabbits with a few brown ones. What would happen to the rabbit population over time as a result of global warming?

asked Mar 3, 2019

1 answer

4 votes

125k views

Which governmental offices could be found within the Roman republic? A) Areopagus B) Ephors C) Kings D) Tribunes

asked Dec 18, 2018

1 answer

1 vote

35.1k views

The process of obtaining food is known as _____ and requires specialized mouthparts.

asked Aug 28, 2018

1 answer

0 votes

176k views

1. It is important to recognize a person who is in need of first aid from choking, from someone who is not. (True or False) 2. When a person is unconscious and not breathing but has a pulse, he or she

asked Mar 12, 2018

1 answer

2 votes

213k views

Rearrange x=3g+2 to make g the subject

asked Feb 17, 2018

2 answers

3 votes

190k views

Isabella spends 4.87 on paintbrush and paint. How many of each item does she buy

asked Jan 28, 2018

2 answers

0 votes

193k views

Is hair abiotic or biotic

asked Sep 18, 2017

2 answers

5 votes

23.3k views

6. Starting from 1.5 miles away, a car drives toward a speed checkpoint and then passes it. The car travels at a constant rate of 53 miles per hour. The distance of the car from the checkpoint is given

asked May 4, 2017

1 answer

3 votes

71.2k views

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