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3 years ago

Match each term with the correct location on a trophic pyramid.

Chemistry

1 answer:

makkiz [27]3 years ago

3 0

Answer:

Consumers B) Second level from the bottom

Secondary Consumers C) Top of the pyramid

Tertiary Consumers D) Bottom of the pyramid

Ape x Predator E) Middle of the pyramid

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Vanadium (IV) carbonate

Anna71 [15]

Answer:

Explanation:

1) Vanadium (IV) → V⁺⁴

Carbonate → CO₃⁻²

So , Vanadium (IV) Carbonate = V₂(CO₃)₄ or V(CO₃)₂

2) Tin (II) = Sn⁺²

Nitrite = NO₂⁻

So, Tin (II) Nitrate = Sn(NO₂)₂

3) Cobalt (III) = Co⁺³

Oxide = O⁻²

So , Cobalt (III) Oxide = Co₂O₃

4) Titanium (II) = Tn⁺²

Acetate = CH₃COO⁻

So , Titanium (II) Acetate = Tn(CH₃COO)₂ or Tn(C₂H₃O₂)₂

5) Vanadium (V) = V⁺⁵

Sulfide = S⁻²

So , Vanadium (V) Sulfide = V₂S₅

6) Chromium (III) = Cr⁺³

Hydroxide = OH⁻

So , Chromium (III) Hydroxide = Cr(OH)₃

7) Lithium = Li⁺

Iodide = I⁻

So , Lithium Iodide = LiI

8) Lead (II) = Pb⁺²

Nitride = N⁻³

So , Lead (II) Nitride = Pb₃N₂

9) Silver = Ag⁺

Bromide = Br⁻

So , Silver Bromide = AgBr

5 0

3 years ago

A metal object has a mass of 8.37g. When it was in a graduated cylinder containing 20.0 ml of water, the water level rose to 23.

Yuri [45]

Mass of metal is 8.37 g, volume of water in graduated cylinder is 20 mL. After adding the metal, water level increases to 23.1 mL. The volume of metal is equal to the increase in water level.

The increase in water level can be calculated by taking difference of final and initial level of water.

Thus,

$V_{metal}=V_{f}-V_{i}=(23.1-20)mL=3.1 mL$

Density of metal is defined as mass per unit volume of metal. It can be calculated as follows:

$d=\frac{m}{V}=\frac{8.37 g}{3.1 g/mL}=2.7 g/mL$

This value corresponds to the density of aluminum.

Therefore, density is 2.7 g/mL and metal is aluminum.

3 0

4 years ago

The diagram below shows the atoms involved in forming table salt. Which statement best describes what happens next ?

bulgar [2K]

Answer: The correct option is D.

Explanation: Table salt has a chemical formula NaCl.

This compound is an ionic compound.

Ionic compound is defined as the compound formed when there is a complete transfer of electron from one element to another.

NaCl consists of two elements, Sodium (Na) and Chlorine (Cl)

Sodium has an atomic number of 11 and its electronic configuration is $[Ne]3s^1$ . This element has 1 extra electron, so in order to have stable electronic configuration, this element will release 1 electron and forms a cation.

Chlorine has an atomic number of 17 and its electronic configuration is $[Ne]3s^23p^5$ . Chlorine element requires 1 electron to have stable electronic configuration. Hence, this element will accept 1 electron and will form an anion.

When these two element combine together, Sodium will give away 1 electron to chlorine and therefore, chlorine becomes anion.

Hence, the correct option is C.

7 0

4 years ago

Read 2 more answers

Scientists define work as the spending of energy.<br><br> True<br> False

Hoochie [10]

True; scientist define work as the spending of energy. This is because energy is required to move an object. For work to be done an object has to be moved from one point to another. Work is measured in joules similar to energy which is also measured in joules. Mathematically, work done is given by the product of force and distance moved by an object or a body.

7 0

3 years ago

Getting empirical formula, but they also gave molar mass too.

-Dominant- [34]

Answer:

Empirical formula is PNCl₂

Explanation:

Percent composition means that 100 g of compound has x g of each element.

In 100 g of compound x, we have 26.73 g of P, 12.09 g of N, 61.18 g of Cl.

So, let's make some rules of three:

In 100 g of compound we have 26.73 g of P, 12.09 g of N, 61.18 g of Cl

In 579.43 g of compound we have:

(579.43 . 26.73) / 100 = 155 g of P

(579.43 . 12.09) / 100 = 70 g of N

(579.43 . 61.18) / 100 = 354 g of Cl

Let's convert the mass of the elements in moles.

155 g of P / 30.97 g/mol = 5 P

70 g / 14 g/mol = 5 N

354 g / 35.45 g/mol = 10 Cl

7 0

4 years ago

Read 2 more answers