which of the following is an example of how research into the effects of a chemical has changed how it is used
Answers
Answer: Finding out that asbestos is dangerous and limiting its use in building materials
Explanation:
Related Questions
Which of the following will stay constant, no matter if the substance is in the solid, liquid, or gas state? volume shape temperature mass
What is the energy of a 3.12 x 10^18 s-1 wave?A. 4.75 x 10 ^42 JB. 5.74 x 10^-7 JC. 2.07 x 10 ^15 JD. 8.6 x 10 ^ 4 J
A) How many moles of gold atoms are present in a 295-gram sample of gold? B) How many gold atoms would there be in the sample?
Elements in a given period of the periodic table contain the same number of
Anaerobic respiration
Aerobic respiration
Photosynthesis
Answers
Answer:
The correct option is: D. Photosynthesis
Explanation:
Photosynthesis is a biological process in green plants by which food such as sugar (like glucose C₆H₁₂O₆), is synthesized from water (H₂O) and carbon dioxide (CO₂) from the atmosphere, in the presence of light energy. This process produces oxygen gas (O₂) as a by-product.
This reaction converts the light energy from the sun to chemical energy.
The reaction involved is: 6 CO₂ (g) + 6 H₂O + light → C₆H₁₂O₆ (s) + 6 O₂ (g)
Photosynthesis is the only process among the given options, that produces oxygen gas.
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Answer:
The characteristic properties are hard and brittle solids having high melting and boiling point
Explanation:
Ionic compounds are the type of chemical compounds that are formed by ionic bonding. An ionic compound is composed of two oppositely charged ions that are held together by electrostatic forces of attraction.
They are solids at room temperature and usually have a crystalline structure and have high melting and boiling point. Ionic compounds are hard but also brittle.
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The chemical equilibrium can take place in a close system and can not be affected by catalyst and is a reversible reaction.
The term "chemical equilibrium" describes a situation in which a chemical reaction's forward reaction rate and reverse reaction rate are equal. In other words, throughout time, the reactant and product concentrations in the reaction mixture do not change. Even if the individual reactions may still be in progress, there is no net change in the reactant or product concentrations at the point of chemical equilibrium. This occurs as a result of the equalisation of the rates at which molecules react to create products and molecules disintegrate into reactants. Even though the reaction is still taking place at the molecular level, the system is in equilibrium and it appears to have stopped.
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(2) 12 atomic mass units
(3) the mass of one mole of carbon atoms
(4) the mass of 12 moles of carbon atoms
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Final answer:
The mass of a proton is approximately equal to 1 atomic mass unit (AMU), which is much lighter than the weight of a mole of carbon atoms or 12 moles of carbon atoms.
Explanation:
The mass of a proton is approximately equal to 1 atomic mass unit (AMU). This measurement is a standardized unit of mass that physicists and chemists use to express the atomic and molecular weights of elements.
The proton, along with the neutron, makes up the nucleus of an atom, and both have approximately the same mass, which is about 1 AMU. This is substantially lighter than the weight of one mole of carbon atoms (approximately 12 grams), and even more so compared to the mass of 12 moles of carbon atoms.
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Answer:
Explanation: All the Arrhenius and Bronsted Lowry acids release ions in solution.
According to Arrhenius and Lowry, acids are substances which release ions when dissolved in water.
Thus all are considered as acids,
Answer:
H+ ions
Explanation:
Acid release H+ ions in water after dissociation while bases release OH⁻ ions in solutions.
During dissociation, acid releases H+ ions which are characterized by losing electron with small charge charge density while bases release OH⁻ ions which have high charge density.
Typical dissociation reaction
1. HCL ⇄ H⁺ + CL⁻
In the above reaction, HCL releases H+ ion in the solution.
2. NaOH ⇄ Na⁺ + OH⁻
While in this second reaction, OH⁻ is relased into the solution.
This illustration is backed by Arrhenius theory which defined acid as substance that produce H+ ions in solutions.
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D is the correct process to convert 36 yds to centimetres 2.54 cm = 1 in.
What are centimetres?
A metric unit of length, equal to one-hundredth of a metre.
To convert a yard measurement to a centimetre measurement, multiply the length by the conversion ratio. The length in centimeters is equal to the yards multiplied by 91.44.
D is the correct process to convert 36 yds to centimetres 2.54 cm = 1 in.
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Answer:
D
Explanation:
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