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Setler [38]
3 years ago
9

Gravity does NOT * 10 points increase when the distance between two objects increases. increase when the distance between two ob

jects decreases. increase when the mass of one object increases. increase when the mass of both objects increases.
Chemistry
1 answer:
Cloud [144]3 years ago
4 0

Answer:

increase when the distance between two objects increases

Explanation:

when the objects move further apart, the gravitational pull between them becomes weaker, and so the gravity isn't as strong. all of the other options increase gravity

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Why is pure silicon a poor conductor at room temperature brainly
trapecia [35]
Pure silicon is a poor conductor at room temperature because it has 4 valence electrons
4 0
3 years ago
An indicator was used to test a water solution with a pH of 12. Which indicator color would be observed?
juin [17]

Answer:

4) pink  phenolphthalein

Explanation:

5 0
3 years ago
Solid calcium carbonate breaks down into carbon dioxide gas, oxygen gas, and solid calcium, write an equation for described reac
Savatey [412]

Answer:

CaCO₃ ------> CaO + CO₂

<em>Note: The breakdown products of solid calcium carbonate is not carbon dioxide gas, oxygen gas, and solid calcium. Rather, it is calcium oxide and carbon dioxide as shown in the reaction equation above.</em>

Explanation:

Calcium carbonate is a mineral which occurs in nature in rocks as calcite and limestone. It is also the main component of eggshells, snail shells, seashells and pearls. It has the molecular formula CaCO₃.

Calcium carbonate or limestone decomposes into calcium oxide and carbon dioxide when heated and the reaction is used to make quicklime and carbon dioxide gas. The equation of the reaction is given below:

CaCO₃ ------> CaO + CO₂

Calcium oxide, one of the products of The decomposition reaction is known as lime and is an important mineral used for many purposes such as reducing the acidity of soils, in the production of limelight, as well as serving as the main ingredient in cement.

The main use of calcium carbonate is in the construction industry as an ingredient of cement. Calcium carbonate is also an important mineral required by sea organisms for making their shells.

5 0
3 years ago
What is the oxidation state, d electron count, and coordination number respectively of the cobalt ion in [CoBr(NH3)4]PO4? What i
Law Incorporation [45]

Answer:

The correct option is: +4, 5, and 5

Explanation:

A coordination complex consists of a central metal atom or ion bonded to ligands by coordinate covalent bonds. The ligands and the central metal together form the coordination sphere.

[CoBr(NH₃)₄]PO₄

Central metal atom - Co

Coordination sphere consists of 1 Br⁻ and 4 NH₃ ligands

<em>Therefore, the coordination number= 5</em>

Let the oxidation state of Co = x

Oxidation state of Br⁻ ligand = (-1)

Oxidation state of NH₃ ligand = 0    

Oxidation state of PO₄³⁻ ligand = -3

∴ x + (-1) × 1 + 0 × 4 + (-3) × 1 = 0

⇒ x = +4

<em>Oxidation state of Co = +4</em>

Electron configuration of Co in ground state: [Ar] 3d⁷ 4s²

Electron configuration of Co in +4 oxidation state: [Ar] 3d⁵ 4s⁰

<em>Therefore, the number of d electrons in cobalt ion = 5</em>

3 0
3 years ago
A certain amount of gas at 25°C and at a pressure of 0.800 atm is contained in a glass vessel. Suppose that the vessel can withs
Korvikt [17]

The maximum temperature : a. 745 K

<h3>Further explanation</h3>

Given

Gas at 25°C(298 K) and at a pressure of 0.800 atm

Final pressure = 2 atm

Required

Final temperature

Solution

Gay Lussac's Law  

When the volume is not changed, the gas pressure in the vessel is proportional to its absolute temperature  

\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}

Input the value :

T₂=(P₂T₁)/P₁

T₂=(2 atm x 298 K)/0.8 atm

T₂ = 745 K = 472 °C

6 0
2 years ago
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