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MrRissso [65]
3 years ago
11

Of the three properties of colour, hardness, and reflectivity, which property or properties describe how a material interacts wi

th light? (1 point) SHOW EVIDENCE AND DONT POINT scam. This quiz is a Connexus academy quiz called: Physical and Chemical Properties Quick Check
reflectivity only



hardness and reflectivity only

color and reflectivity only


color, hardness, and reflectivity

Use the following observations about a material to answer the question.

The material is shiny and reflects light.
An iron nail is able to scratch the material.
Which statement best classifies the observations?

(1 point)

Only observation 1 uses a physical property of matter.


Only observation 2 uses a physical property of matter.

Neither observation uses a physical property of matter.


Both observations use a physical property of matter.
Chemistry
1 answer:
hodyreva [135]3 years ago
5 0

The properties that describe how a material interacts with light are color and reflectivity only.

Both observations use a physical property of matter.

The physical properties of substances are the properties of substances that can be observed without changing the arrangement of atoms in the substance.

The ability of an object to scratch another is known as hardness while the ability to reflect visible light is called reflectivity. Both are physical properties.

The color of a substance results from the interaction of the molecules of the substances with light. Objects have specific colors depending on the wavelength of light absorbed and subsequently emitted by the substance.

Reflectivity deals with the ability of an object to reflect visible light.

Both color and reflectivity describe how a material interacts with light.

Learn more; brainly.com/question/81085

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Which best explains the importance of indicator species?
Contact [7]

Answer:

Explanation:

ndicator species (IS) are animals, plants, or microorganism used to monitor changes in our environment. For example, they can tell us about the impact of pollution on an ecosystem, or how well an impaired environment is being managed or restored.

5 0
3 years ago
The rate constant for a certain reaction is measured at two different temperatures:
Talja [164]

Answer: The activation energy Ea for this reaction is 22689.8 J/mol

Explanation:

According to Arrhenius equation with change in temperature, the formula is as follows.

ln \frac{k_{2}}{k_{1}} = \frac{-E_{a}}{R}[\frac{1}{T_{2}} - \frac{1}{T_{1}}]

k_1 = rate constant at temperature T_1 = 2.3\times 10^8

k_2 = rate constant at temperature T_2 = 4.8\times 10^8

E_a= activation energy = ?

R= gas constant = 8.314 J/kmol

T_1 = temperature = 280.0^0C=(273+280)=553K

T_2 = temperature = 376.0^0C=(273+376)=649K

Putting in the values ::

ln \frac{4.8\times 10^8}{2.3\times 10^8} = \frac{-E_{a}}{8.314}[\frac{1}{649} - \frac{1}{553}]

E_a=22689.8J/mol

The activation energy Ea for this reaction is 22689.8 J/mol

3 0
3 years ago
1. Rank the following compounds in order of decreasing acid strength using periodic trends. Rank the acids from strongest to wea
Nookie1986 [14]

Answer:

ESCALAS MAYORES (D, E, G, A, B) Porfavor necesito ayuda,te lo agradecería muchísimo!!

Es urgente

7 0
3 years ago
Oxygen has 8 electrons. Is it chemically inert or reactive?
liraira [26]

Answer:

Reactive

Explanation:

8 0
3 years ago
Read 2 more answers
Starting with 6.3 g of salicylic acid, how many grams of acetylsalicylic acid (theoretical yield) can be made? Assume salicylic
tensa zangetsu [6.8K]

Answer:

We will produce 8.2 grams of acetylsalicylic acid

Explanation:

step 1: Data given

Mass of salicylic acid, = 6.3 grams

Molar mass salicylic acid = 138.12 g/mol

Molar mass of acetylsalicylic acid = 180.158 g/mol

Step 2: The balanced equation

C7H6O3 + C4H6O3 → C9H8O4 + C2H4O2

Step 3: Calculate moles salicylic acid

Moles salicylic acid = mass salicylic acid / molar mass salicylic acid

Moles salicylic acid = 6.3 grams / 138.12 g/mol

Moles salicylic acid = 0.0456 moles

Step 4: Calculate moles acetylsalicylic acid

Since the mole ratio is 1 to 1

For 0.0456 moles salicylic acid we'll have 0.0456 moles acetylsalicylic acid

Step 5: Calculate mass acetylsalicylic acid

MAss acetylsalicylic acid = moles acetylsalicylic acid * molar mass acetylsalicylic acid

MAss acetylsalicylic acid = 0.0456 moles * 180.158 g/mol

Mass acetylsalicylic acid = 8.2 grams

We will produce 8.2 grams of acetylsalicylic acid

4 0
3 years ago
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