Which of the following representations shows the correct placement of trophic levels?
Secondary Consumers
Primary Consumers
Producers

Answer:

extensive properties

Explanation:

,such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity.

Answer:

Salt is effective as a preservative because it reduces the water activity of foods. .

Answer:

Watts are a measurement of power, describing the rate at which electricity is being used at a specific moment. For example, a 15-watt LED light bulb draws 15 watts of electricity at any moment when turned on. Watt-hours are a measurement of energy, describing the total amount of electricity used over time.

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Answer: True

Watts are a measurement of power, used in light bulbs and other electricity. It is also measured as candela (C) in SI Units. The answer to the question is true because of this measurement.

Hope this helps!

Answer:

The release into the air of chemicals and particles can cause direct damage to the troposphere (air pollution); alter the composition and function of atmospheric layers (greenhouse effect) or other indirect damages (ozone layer depletion).

Explanation:

Answer:

Molarity = 0.425 M

Explanation:

Given data:

Number of moles = 3.7 mol

Volume of solution = 8.7 L

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Molarity = 3.7 mol/8.7 L

Molarity = 0.425 M

Answer: magnetic field

A field produced by a magnetic object that exerts a force on other magnetic materials or moving electrical charges is called a Magnetic field.

The magnetic subject is the region around a magnet in which the effect of magnetism is felt. We use the magnetic area as a device to describe how the magnetic force is shipped inside the area around and inside something magnetic in nature.

The magnetic area is extremely critical to maintaining lifestyles in the world. without it, we'd be exposed to excessive amounts of radiation from the solar, and our environment would be unfastened to leak into space.

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Answer:

hi :D

Explanation:

State the relationship between temperature and kinetic energy. The Kinetic Molecular Theory allows us to explain the existence of the three phases of matter: solid, liquid, and gas. In addition, it helps explain the physical characteristics of each phase and how phases change from one to another.

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Answer:

31.5 moles

Explanation:

Volume of H2O = 0.567 L

Number of mole of H2O =.?

Next, we shall convert 0.567 L to millilitres (mL). This can be obtained as follow:

1 L = 1000 mL

Therefore,

0.567 L = 0.567 L × 1000 mL / 1 L

0.567 L = 567 mL

Thus, 0.567 L is equivalent to 567 mL.

Next, we shall convert 567 mL to grams (g). This can be obtained as follow:

1 mL of H2O = 1 g

Therefore

567 mL of H2O = 567 g of H2O

Finally, we shall determine the number of mole in 567 g of H2O. This can be obtained as follow:

Mass of H2O = 567 g

Molar mass of H2O = (2×1) + 16

= 2 + 16 = 18 g/mol

Mole of H2O =?

Mole = mass /Molar mass

Mole of H2O = 567 /18

Mole of H2O = 31.5 moles

Fe²⁺ has the same number of protons as Fe³⁺.

In order to know the number of protons of a species, we need to look for the atomic number (Z) in the Periodic Table.

The atomic number of Fe is 26, so it has 26 protons. Since protons are in the nucleus, they are not lost nor gained. Fe³⁺ results from Fe losing 3 electrons, but it has 26 protons as well.

Taking this into account, let's consider the number of protons of the following species:

A) Mn³⁺. It has 25 protons like Mn (Z = 25).

B) Co²⁺. It has 27 protons like Co (Z = 27).

C) Fe²⁺. It has 26 protons like Fe (Z = 26).

D) Ni. It has 28 protons (Z = 28).

E) Co³⁺. It has 27 protons like Co (Z = 27).

Fe²⁺ has the same number of protons as Fe³⁺.

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Answer:

Energy is used when someone is climbing while energy is not used when someone is going down the slope

Answer:

law of conservation of mass

Explanation:

Answer:

You would just put the definition and what it means im pretty sure

Explanation:

I hope this helps!!

Answer:

Explanation:

2Ca    +    O₂   =    2CaO

80 g     32 g         112 g

given amount of Ca = 7.75 g

it will require oxygen =  32 x 7.75 / 80 = 3.1 g

but available oxygen = 2.44 so oxygen is the limiting reagent .

32g oxygen reacts with calcium to give 112 g of calcium oxide

2.44 gram of oxygen reacts with calcium to give 112 x 2.44 / 32 of CaO .

= 8.54 gram .

Theoretical yield of CaO = 8.54 gram.

Answer:

(3.1 x 10^3) (1.00 x 10^7) = 31000000000

Answer:

a) first group

b) metals

c) K - potassium, Li - lithium

Explanation:

a) they are the alkali metals

b) they're alkali metals lol

c) just look at a periodic table :P

Answer:

i think its alcohol and salt because they put salt on the ground to dissolve the snow so what I think is its alcohol and salt cuz they both look like they would evaporate pretty easy and alcohol evaporates really really easy so I think it's alcohol and salt because salt May absorb it or something I don't know but yeah

Answer: alcohol and iodide

Explanation:

the answer is: 9.80665

Answer:

Trigonal planar

Explanation:

If we look at the carbon atom indicated I in the image, we will discover that it is a carbon atom that is bonded to a nitrogen atom via a double bond.

Recall that an sp2 hybridized carbon atom has a trigonal planar geometry. When a carbon atom is sp2 hybridized, it is in a trigonal planar geometry as we can clearly see from the image.

Answer:

Tobacco use: The most preventable cause of cancer death

Explanation:

cancer might not be right

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{2.16 \times {10}^{26} }{6.02 \times {10}^{23} } \\ = 358.80398671...[/tex]

We have the final answer as

Hope this helps you

Answer:

Average atomic mass of thallium = 204.4 amu.

Explanation:

Given data:

Abundance of thallium-203 = 30%

Abundance of thallium-205 = 70%

Average atomic mass = ?

Solution:

Average atomic mass of thallium = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass of thallium = (30%×203)+(70%×205) /100

Average atomic mass of thallium =  6090 + 14350 / 100

Average atomic mass of thallium = 20440 / 100

Average atomic mass of thallium = 204.4 amu.

Answer:

rock is the correct answer

Explanation:

Answer: here's the thing: rocks are minerals.Well, made out of them. so you can say that dolerite is a rock, but it is made out of minerals

Explanation:

Answer:

alkali metals

Explanation:

alkali metals only have one valence electron, meaning they are extremely reactive. they are considered the most reactive on the periodic table.

Answer:

c. the number of filled electrons shells increases

Answer:

the answer is c

Answer:

D.

Explanation: