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
Mrac [35]
2 years ago
9

At a supermarket, items made from fossil fuels include _______ . A. steel food cans B. fruits and vegetables C. plastic grocery

bags and food containers D. cardboard cereal boxes
Chemistry
1 answer:
antoniya [11.8K]2 years ago
5 0

Answer: Plastic bags and food containers

You might be interested in
Is the shape of solid defined or undefined
enyata [817]

defined, a solid will always have a definite shape and volume because it doesn´t depend on its container shape

6 0
3 years ago
Read 2 more answers
3 ways of improving the quality of an indigenous soap
Monica [59]

Answer : Below are three ways described in brief for improving the quality of indigenous soap.

1) Add virgin coconut oil which serves as a softener and betel leaf extract. It is used to improve the quality of soap as an antimicrobial agent.

2) Add activated charcoal black granules or powder to the soap, it removes maximum dirt from the skin.

3) Adding a filler which will increase the shelf life of usage of the soap will also improve its quality.

4 0
3 years ago
Calculate the pH value in each of the following solutions, given their [H3O+] concentrations.
FrozenT [24]

Answer:

See Explanations ...

Explanation:

In general, pH is a 'p-factor' expression which, simply put, is a way to express very small numbers (i.e.; exponential data with 10⁻ⁿ value ranges) in a more convenient form. That is, by definition, pX = -log(X) where X is the data value of interest. In practical terms, p-factor analysis can be applied to a number of physical & chemical measurements such as ...

pH => measure of acidity of solution = -log[H₃O⁺]

pOH => measure of alkalinity of solution = -log[OH⁻]

pKa => measure of weak acid ionization in aqueous solution = -log(Ka)

pKb => measure of weak base ionization in aqueous solution = -log(Kb)

pKsp => measure of salt ionization in aqueous solution = -log(Ksp)

Such can be applied to ranges of small-number values defining other chemical and physical properties.

For this problem:

Gastric Juice: [H₃O⁺] = 1.6 x 10⁻²M => pH = -log(1.6 x 10⁻²) = -(-1.80) = 1.8

Cow's Milk:  [H₃O⁺] = 2.5 x 10⁻⁷M => pH = -log(2.5 x 10⁻⁷) = -(-6.60) = 6.60

Tomato Juice:  [H₃O⁺] = 5.0 x 10⁻⁵M => pH = -log(5.0 x 10⁻⁵) = -(-4.30) = 4.30

Other Applications:

Given:

[OH⁻] = 6.30 x 10⁻¹³M => pOH = -log(6.30 x 10⁻¹³) = -(-12.2) = 12.2

Ka = 4.5 x 10⁻⁵ => pKa = -log(4.5 x 10⁻⁵) = -(-4.35) = 4.35

Kb = 8.2 x 10⁻⁶ => pKb = -log(8.2 x 10⁻⁶) = -(-5.09) = 5.09

Ksp = 5.5 x 10⁻¹⁰ => pKsp = -log(-5.5 x 10⁻¹⁰) = -(-9.26) = 9.26

Note: The values for Ka, Kb & Ksp are typically provided in tables of weak acid ionization constants (Ka-values), weak base ionization constants (Kb-values) or solubility product constants of salts (Ksp-values).

Hope this helps, Doc :-)

4 0
3 years ago
Water can be formed according to the equation: 2h2 (g) + o2 (g) → 2h2o (g) if 8.0 l of hydrogen is reacted at stp, exactly how m
Ket [755]
Four litre of oxygen will be required
8 0
3 years ago
Read 2 more answers
Check the statements that are accurate. Check all of the boxes that apply. Before Thomson’s experiments, scientists accepted tha
elixir [45]
Answer 1) It is incorrect.

Explanation : For the statement; 

Thomson did experiments with cathode ray tubes  to show that all atoms contain tiny negatively charged subatomic particles called as electrons<span>.

So the statement should be like this:
AFTER the </span><span>Thomson’s experiments, scientists accepted that the atom was made up of smaller particles.

Answer 2) This is correct.

Explanation : Rutherford was the scientist who discovered that atoms has volume is because of the empty spaces inside it. He did the gold foil experiments to prove this and he was successful in doing this by concluding that tiny dense empty places are occupied by positively charged nucleus.

Answer 3) This is Correct.

Explanation : After Thomson and Rutherford, Millikan also performed an experiment to prove that an atom contains a small positively charged nucleus which is usually surrounded by negatively charged electrons by his oil drop experiment.</span>
5 0
3 years ago
Other questions:
  • Example of Inertia of Rest:
    9·2 answers
  • Bud N. Chemist must determine the density of a mineral sample. His four trials yield densities of 4.77 g/cm3 , 4.67 g/cm3 , 4.69
    9·1 answer
  • someone pls help thanks - Calculate the total energy in the 1.5x10^13 photons of gamma radiation having wavelength of 3.0x10^-12
    8·2 answers
  • Which of the following is the best explanation for a covalent bond?
    11·1 answer
  • If an atom has a mass number of 23, which of the following is always true?
    15·1 answer
  • Which statement best compares potential and kinetic energy?
    12·2 answers
  • 1. How are biomes determined?<br> how ?
    15·1 answer
  • 2CO(g)+O2 (g) =2CO2(g)
    11·1 answer
  • If a student's unknown is a colorless liquid and its boiling point was measured to be about 78°C
    6·1 answer
  • Which one of the following combinations cannot function as a buffer solution?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!