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
solniwko [45]
3 years ago
11

Which percentage is in the appropriate range for a snack to be considered a “good source” of nutrients?

Chemistry
2 answers:
Ksju [112]3 years ago
7 0
I think 35 percent. Hope this helps!
alexandr402 [8]3 years ago
6 0

Answer:

15

Explanation:

You might be interested in
What is glucose? How is it formed?​
Alik [6]
Glucose is a simple sugar with the molecular formula C6H12O6. It is a carbohydrate.
6 0
3 years ago
Read 2 more answers
A method used by the U.S. Environmental Protection Agency (EPA) for determining the concentration of ozone in air is to pass the
baherus [9]

Answer: 1. 9.08\times 10^{-6} moles

2. 90 mg

Explanation:

O_3(g)+2NaI(aq)+H_2O(l) \rightarrow O_2(g)+I_2(s)+2NaOH(aq)

According to stoichiometry:

1 mole of ozone is removed by 2 moles of sodium iodide.

Thus 4.54 \times 10^{-6} moles of ozone is removed by =\frac{2}{1}\times 4.54 \times 10^{-6}=9.08\times 10^{-6} moles of sodium iodide.

Thus 9.08\times 10^{-6} moles of sodium iodide are needed to remove 4.54\times 10^{-6} moles of O_3

2. \text{Number of moles of ozone}=\frac{0.01331g}{48g/mol}=0.0003moles

According to stoichiometry:

1 mole of ozone is removed by 2 moles of sodium iodide.

Thus 0.0003 moles of ozone is removed by =\frac{2}{1}\times 0.0003=0.0006 moles of sodium iodide.

Mass of sodium iodide= moles\times {\text {molar mass}}=0.0006\times 150g/mol=0.09g=90mg    (1g=1000mg)

Thus 90 mg of sodium iodide are needed to remove 13.31 mg of O_3.

3 0
3 years ago
The melting point of H₂O(s) is 0 °C. Would you expect the melting point of H₂S(s) to be 85 °C, 0 °C or -85 °C.? Justify your cho
dimulka [17.4K]

Answer:

-85 °C

Explanation:

O and S are in the same group( Group 16). Since S is below O it's atomic mass is higher than O. So molar mass of H2S is higher than H2O. The strength of Vanderwaal Interactions ( London dispersion forces) increases when the molar mass increases. However, only H2O can form H bonds with each other. This is because electronegativity of O is higher than S and therefore H in H2O has a higher partial positive charge than H of H2S.

H bond dominate among these 2 types of forces so the strength of attractions between molecules is higher in H2O than H2S. Therefore more energy should be supplied for H2O to break inter

molecular forces and convert from solid to liquid state than H2S. So mpt of H2O must be higher than that of H2S.

5 0
3 years ago
Suggest a method for measuring the size of the colony.
Evgen [1.6K]

Answer:

Counting the number of colonies that arise on a pour plate can calculate the concentration by multiplying the count by the volume spread on the pour plate. Direct counting methods are easy to perform and do not require highly specialized equipment, but are often slower than other methods

Explanation:

I hope it will help you

7 0
3 years ago
Which group of elements have some properties of metals and some properties of nonmetals?
aleksandr82 [10.1K]
The group of elements that have some properties of metals and some properties of nonmetals are called metalloids.
6 0
3 years ago
Other questions:
  • Which colloid is more stable milk or ice cream and how do you know
    10·2 answers
  • Write the condensed structural formulas and names for all constitutional isomers with the formula c4h9br
    12·1 answer
  • Water has a higher boiling point than acetone does. Which of the following statements about water and acetone in the liquid stat
    11·1 answer
  • How can one kg of iron melt more ice than 1 kg lead at 100 °C
    5·1 answer
  • What is the formula for the compound for the compound dinitrogen pentoxide
    12·2 answers
  • 50 POINTS!!!
    10·1 answer
  • Assuming the metals lose all their valence electrons and the nonmetals gain electrons to complete the s-p subshells, which listi
    13·1 answer
  • Is SiO2 Polar or Non-polar?
    6·2 answers
  • Which one is it (it’s multiple choice too)
    13·1 answer
  • What families do you have in your chart
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!