1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sweet-ann [11.9K]
3 years ago
13

5. Which of the following has variable compositionA. WaterB. sugarC, soilD. Salt​

Chemistry
1 answer:
erica [24]3 years ago
7 0

Answer:

C. Soil

Explanation:

The choice with variable composition is the soil. Soil have many different composition.

  • Soil is made up of minerals, organic matter , water and soil air.
  • Soil minerals are derived from weathered bedrock materials that have been broken down into small pieces.
  • Organic matter is derived from dead and decaying materials from plants and animals.
  • All these materials combine together to form a soil.
You might be interested in
Three samples of wood with the same volume were weighed. Sample A has a mass of 224.96 g, sample B has a mass of 0.55632 Ibs, an
sertanlavr [38]

Answer:

sample C have the highest density

Explanation:

Data Given:

mass of sample A = 224.96 g

Convert g to kg

1 g = 0.001 Kg

224.96 g = 224.96 x 0.001 = 0.225 kg

mass of sample B = 0.55632 Ibs

Convert lbs to kg

2.21 lb = 1 kg

0.55632 Ibs = 0.55632 / 2 = 0.278 kg

mass of sample C = 0.30648 kg

Solution:

To calculate density of every sample we have the following formula

            d = m/v . . . . . . . . . . (1)

It is clear from the formula that density have direct relation with mass and inverse relation with volume, that is density increase with increasing in mass.

As we have same volume of wood sample, so suppose that each sample have volume of  2 cm³

So now we find density for each sample

As for sample A

  • mass of sample A = 0.225 kg
  • supposed volume = 2 cm³

Put values in formula 1

                d = 0.225 kg / 2 cm³

                d = 0.128 kg/cm³

As for sample B

  • mass of sample A = 0.278 kg
  • supposed volume = 2 cm³

Put values in formula 1

                d = 0.278 kg / 2 cm³

                d = 0.139 kg/cm³

As for sample C

  • mass of sample C = 0.30648 kg
  • supposed volume = 2 cm³

Put values in formula 1

                d = 0.30648 kg / 2 cm³

                d = 0.153 kg/cm³

So it shows that sample C have the highest density that is 0.153 kg/cm³ . As it have the highest mass too among all samples.

5 0
2 years ago
At the ph found in cells (about 7.0) what happens to the amino group on an amino acid
Andrew [12]
This means that the amino acid is neutral due to the pH equals 7
6 0
3 years ago
Which 2 elements make up more than 80% of the atoms found in the Earth's crust​
mars1129 [50]

oxygen and silicon I believe

6 0
3 years ago
Rank the solutions in order of decreasing [H3O ]. Rank solutions from largest to smallest hydronium ion concentration. To rank i
Usimov [2.4K]

Answer:

0.10M HCN  <  0.10 M HClO  <  0.10 M HNO₂  < 0.10 M HNO₃

Explanation:

We are comparing acids with the same concentration. So what we have to do first is to determine if we have any strong acid and for the rest ( weak acids ) compare them by their Ka´s ( look for them in reference tables ) since we know the larger the Ka, the more Hydronium concentration will be in these solutions at the same concentration.

HNO₃ is a strong acid and will have the largest hydronium concentration.

HCN  Ka = 6.2 x 10⁻¹⁰

HNO₂ Ka = 4.0 x 10⁻⁴

HClO  Ka = 3.0 x 10⁻⁸

The ranking from smallest to largest hydronium concentration will then be:

0.10M HCN  <  0.10 M HClO  <  0.10 M HNO₂  < 0.10 M HNO₃

5 0
3 years ago
Right now I’m a freshmen, and we got our scheduling paper for next year as sophomores. I’m wondering if I should take chemistry
Anastasy [175]
Anatomy I think it's important to know anatomy as a young adult so u are self aware of your body
3 0
2 years ago
Read 2 more answers
Other questions:
  • The mass number of an atom is equal to which of the following?
    9·1 answer
  • Which scenario would cause a covalent bond to form?
    6·1 answer
  • A galvanic (voltaic) cell consists of an electrode composed of nickel in a 1.0 M 1.0 M nickel(II) ion solution and another elect
    9·1 answer
  • You are comparing a reaction that produces a chemical change and one that produces a physical change. What evidence could you us
    11·2 answers
  • Scientists use this method to create plants that have higher nutritional values
    5·1 answer
  • Which of these choices is the correct net ionic equation for the reaction that occurs when solutions of pb(no3)2 and nh4cl are m
    6·1 answer
  • For the reaction below, determine the standard free energy change, δg o. cu(s) + sn2+(aq) → cu2+(aq) + sn(s) e o cell =–0.48 v v
    6·1 answer
  • Calculate the number of moles in 180 grams of Magnesium Chloride
    10·1 answer
  • In a tug of war, the team on the left pulls with a force of 430 N and the team on the right pulls with a force of 420 N. What is
    12·1 answer
  • Pls helpppppppp!!!!!!!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!