CHEMISTRY HIGH SCHOOL

What type of claim must be supported by scientifically valid evidence for it to be approved for use on a food label? A. Health claim B. Nutrient content claim C. Structure/function claim D. EER

Answers

Answer 1
Answer: Option A. Health claim

Health claim must be supported by scientifically valid evidence to be approved in using  for food label.

This is also a food guide to all consumers the food content implied by manufacturers to their products.
Answer 2
Answer:

Answer is Health Claim

Related Questions

The molar mass of NH3 is 17.03 g/mol. The molar mass of H2 is 2.0158 g/mol. In a particular reaction, 0.575 g of NH3 forms. What is the mass, in grams, of H2 that must have reacted, to the correct number of significant figures?
Which type of change must occur to form a compound?(1) chemical (3) nuclear(2) physical (4) phase
What are the efficient things needed for a village ​
Why are hydrophobic molecules such as fats and oils unable to dissolve in watery solutions?
element x has an electron configuration of 1s²2s²2p⁶3s¹, while element z has an electron configuration of 1s²2s²2p⁵. a) which element would have greater first ionization energy? b) which element would have a larger radius? c) which element would have higher electronegativity? d) which element would form an ion that has a larger radius? e) which element would release more energy when it gains an electron?

A sample of salt (sodium chloride) is placed on the tip of a platinum wire. When the sample is heated on blue flame the flame turned yellow. Explain how this can be done to electrons in sodium atoms

Answers

So platinum is a transition metal. In general transition metals are reducers, which means they can give the electrons they have, to the sodium atoms. Also in chemistry we look at sub orbitals rather that shells(2,8,8). So due to the energy from heat, the d orbital split as electrons move to a higher energy level. Some of the electrons are given to the sodium ions and therefore the flame changes colour to yellow. 
The excitation of the electrons is caused by them getting energy and so moving up an energy level. This energy is released and the electron returns to it's original state. The energy released, however, does not release in the same direction, but in different/various directions. Therefore the colour of the light changes as some energy is released in the surrounding.

Find volume of 1 mole of helium gas when the pressure is 1.46 atm and the temperature is 270k

Answers

we can use the ideal gas law equation to find the volume of He
PV = nRT
where P - pressure 1.46 atm x 101 325 Pa/atm = 147 934.5 Pa 
V - volume 
n - number of moles - 1 mol
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature - 270 K
substituting these values in the equation
147 934.5 Pa x V = 1 mol x 8.314 Jmol⁻¹K⁻¹ x 270 K
V = 15.17 L
the volume is 15.17 L

The standard unit for density is g/cm3 or g/mL.

Answers

it’s g/cm3 for solids & liquids, and g/ml for gases

What is the word equation for molecules of magnesium reacting with molecules of oxygen to produce molecules of magnesium oxide?magnesium + magnesium oxide = oxygen
magnesium + oxygen =magnesium oxide
magnesium oxide = magnesium
magnesium + oxygen magnesium + oxygen

Answers

Answer:   magnesium + oxygen =magnesium oxide

Explanation:  When Magnesium reacts with the molecules of oxygen , Magnesium oxide is produced.

                        Mg (s) + O (g)   →   MgO (s)

In this equation, both magnesium and oxygen are present in its elemental state.

Magnesium is present in solid form and oxygen is present in gaseous form.

The Bonding between the Magnesium and the oxygen is purely IONIC bonding as Magnesium loses its 2 valence electrons to complete its octet and oxygen gains its electrons to make its electron count 8 in the valence shell.

Answer: (B) Magnesium + oxygen =magnesium oxide

Explanation:

Suppose that you measure a pen to be 10.5 cm long. Convert this to meters.

Answers

If the pen is 10.5cm long, it is 0.105 meters. This can be worked out by considering that there are 100cm's in 1 meter, so you need to divide 10.5 by 100. You then move the decimal place 2 places to the right (because of the two zeros), which leads you to your answer of 0.105.

A pen measuring 10.5 cm long is equivalent to 0.105 meters.

Further Explanation

Length  

  • Length refers to a measurement of distance. It is the distance between two points.

S.I units  

  • The S.I. units of lengths. However, length can be measured using other units such as millimeters, centimeters, kilometers, etc.

Metric system unit of measurement  

  • It is a system of measurement that uses units such as gram, liter, and meter to measure mass, capacity and length respectively.
  • This system measures length based on meters, such that all the other units of lengths are based on an inter-conversion of units in meters.

Conversion of units measuring length

1 centimeter = 10 millimeters  

1 meter = 100 centimeters  

1 meter = 1000 millimeters  

1 kilometer = 1000 meters  

1 kilometer = 1000000 centimeters, and so forth.

Conversion of larger units to small units  

  • To convert larger units of measurement to smaller units we multiply we multiply the number of larger units by the appropriate conversion factor.

Conversion of smaller units to larger units

  • When converting smaller units of measurements to larger units of measurements we divide the number of smaller units by the appropriate factor.
  • For example, to convert cm to m, we divide the number of cm by 100.

In the question;

The pen measures 10.5 cm  

But, 1 meter = 100 centimeters

Thus;

10.5 cm will be equivalent to;

= 10.5 cm/100 cm  

= 0.105 meters

Therefore, a pen measuring 10.5 cm in length is equivalent to 0.105 meters.

Keywords: Length, meters, centimeters, metric unit system  

Learn more about:  

Level: Middle school  

Subject: Mathematics  

Topic: Metric system of measurements  

Sub-topic: Units of measuring length  

The reaction of a Lewis acid with a Lewis base would most likely be accompanied by an increase in which item?covalent bonds

hydronium ions

electron pairs

hydroxide ions

Answers

The correct option is COVALENT BONDS.

A Lewis acid is defined as a substance which accept a pair of electron while a Lewis base refers to a substance that donate an unshared pair of electrons to another chemical specie with which it shared the donated pair of electrons.

Lewis acid and Lewis base react together to form salt and water. This type of reaction is called neutralization reaction. The neutralization reaction of Lewis acid and Lewis base involves electron pairs transfer, thus, there is an increase in the number of covalent bonds during this reaction.

Answer:

The correct answer is "covalent bonds".

Explanation:

A covalent coordinated or dative bond is formed when two atoms are linked together, sharing a pair of electrons. But only one of these atoms is the one that brings the pair of shared electrons. For this type of bond to occur, it is required that the donor atom has a pair of free electrons in an outer orbital and the acceptor atom has the capacity to receive that pair of electrons in its last valence layer.

On the other hand, a Lewis base is a substance that can share or donate a pair of electrons, because they have a pair of solitary electrons. A  Lewis acid is that substance that accepts or takes a pair of electrons because they have their last electron layer incomplete.  

It is then possible to say that an Lewis acid-base reaction is formed by the Lewis acid and base joined by a coordinated covalent bond.

So, the correct answer is "covalent bonds".
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