(Help ASAP) in the summer many people in Argentina which is located in the southern hemisphere enjoy going to the beach which diagram to the right shows the position of earth when it is summer in Argentina?

Answer:

Both are only physical changes

Answer:

one atom of iron and three atoms of chlorine.

Explanation:

I just took the test and made a 100 and im really good that this because it so easy.

The compound FeCl₃ is made of one atom of iron and three atoms of chlorine.

Let's consider the chemical formula for iron (III) chloride: FeCl₃.

Let's consider which of the following is true for iron (III) chloride.

The compound FeCl₃ is made of:

The compound FeCl₃ is made of one atom of iron and three atoms of chlorine.

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Answer:

V = 16.81 L

Explanation:

Given data:

Number of moles = 0.75 mol

Temperature = standard = 273 K

Pressure = 1 atm

Volume of balloon = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will rearrange the formula.

V = nRT/P

V = 0.75 mol ×0.0821 atm.L/mol.K ×273 K / 1 atm

V = 16.81 atm.L/ 1 atm

V = 16.81 L

Answer:

True

Explanation:

Answer:

A line spectrum is produced when the electron moves from one energy level to a lower energy level.

Answer:

Explanation:

...from one energy level to a lower energy level

Answer:

A

Explanation:

Hopefully this helps.

Answer:

its A

Explanation:

The trends in electron configuration in the periodic table can be explained in the given way.

The number of valence electrons:

Increases from left to right across a period.

Remains the same from the top to the bottom of a group.

Electrons are added into the outermost:

In Groups 1 and 2 (Alkali metals and Alkaline earth metals).

Electrons are added in the outermost:

In Groups 3 through 12 (Transition metals).

Electrons are added in the outermost:

In Groups 13 through 18 (Boron group through Noble gases).

Hence, the trends in electron configuration in the periodic table are discussed above.

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Answer:

New volume = 150 mL

Explanation:

Initial temperature, T₁ = 35°C

Initial volume, V₁ = 350 mL

We need to find the change in volume when the temperature drops to 15°C.

The relation between the temperature and the volume is given by Charle's law. Let new volume is V₂. It can be given by :

[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{350\times 15}{35}\\\\V_2=150\ mL[/tex]

So, the new volume is 150 mL.

Answer:

Many scientists view biofuels as inherently carbon-neutral: they assume the carbon dioxide (CO2) plants absorb from the air as they grow completely offsets, or “neutralizes,” the CO2 emitted when fuels made from plants burn.

Explanation:

put in your own words, happy to help

To solve such this we must know the concept of combustion reaction. Therefore, the missing word is neutral that is Biofuels are therefore described as being carbon neutral.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

When biofuels are burned they release the same amount of carbon dioxide as was removed from the atmosphere by the plant. Biofuels are therefore described as being carbon neutral. the products of combustion reaction are carbon dioxide and water.

Therefore, the missing word is neutral.

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Answer:

hydrogen and oxygen to form water

Answer:

The noble gases(neon, helium, argon)

Explanation:

In the ground state, noble gas atom has a completely filled valence electron shell. Space makes up the majority of an atom.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense. In the ground state, noble gas atom has a completely filled valence electron shell.

Therefore, in the ground state, noble gas atom has a completely filled valence electron shell.

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Answer:

[tex]\boxed {\boxed {\sf Ionic \ bond}}[/tex]

Explanation:

First, let's look at the Periodic Table.

We see that aluminum is a metal, while oxygen is a non-metal.

Now, let's recall three types of bonds

Since we have a metal (Al) and a non-metal (O), aluminum oxide must have an ionic bond.

Answer:

1. B

2. C

Explanation: The law that the properties of the elements are periodic functions of their atomic numbers. And the second one is, most of the air we breathe is made of oxygen.

Answer:

24 electrons

Explanation:

In order to write the Chromium electron configuration we first need to know the number of electrons for the Cr atom (there are 24 electrons). Once we have the configuration for Cr, the ions are simple.

I hope this is correct!

Answer:

11.9 g S

General Formulas and Concepts:

Chem

Explanation:

Step 1: Define

2.23 × 10²³ atoms S

Step 2: Define conversions

Avogadro's Number

Molar Mass of S - 32.07 g/mol

Step 3: Dimensional Analysis

[tex]2.23 \cdot 10^{23} \ atoms \ S(\frac{1 \ mol \ S}{6.022 \cdot 10^{23} \ atoms \ S} )(\frac{32.07 \ g \ S}{1 \ mol \ S} )[/tex] = 11.8758 g S

Step 4: Check

We are given 3 sig figs. Follow sig fig rules.

11.8758 g S ≈ 11.9 g S

A "cell" might be a better name for the torch battery. A "battery" is a collection of connected cells. Another example of an electric cell is a lemon with two strips of different metals (for instance, zinc & copper) inserted into it. The correct option is B.

A primary cell in a dry-cell battery is one that cannot be recycled. Each dry-cell battery has a cathode and an anode for operation. Remote controls, clocks, and calculators are a few examples of modern-day items that employ dry-cell batteries.

Alkaline and lithium batteries are the two most typical types found in flashlights. A "dry" cell used in a torch has a finite lifespan.

Thus the correct option is B.

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Answer:

radiant

Explanation:

Radiant Energy

This should do it.

Answer:

The pressure inside the cylinder is [tex]8.327\times 10^{-3}[/tex] atmospheres.

The value for R for this problem is 0.082 atmosphere-liters per mol-Kelvin.

Explanation:

Let suppose that helium gas inside the cylinder behaves as an ideal gas, the equation of state for the ideal gas is:

[tex]P\cdot V = n\cdot R_{u}\cdot T[/tex] (1)

Where:

[tex]P[/tex] - Pressure, measured in atmospheres.

[tex]V[/tex] - Volume, measured in liters.

[tex]n[/tex] - Molar quantity, measured in moles.

[tex]T[/tex] - Temperature, measured in Kelvin.

[tex]R_{u}[/tex] - Ideal gas, measured in atmosphere-liters per mole-Kelvin.

If we know that [tex]V = 60\,L[/tex], [tex]n = 0.020\,mol[/tex], [tex]T = 304.65\,K[/tex] and [tex]R_{u} = 0.082\,\frac{atm\cdot L}{mol\cdot K}[/tex], then the pressured inside the cylinder is:

[tex]P = \frac{n\cdot R_{u}\cdot T}{V}[/tex]

[tex]P = \frac{(0.020\,mol)\cdot \left(0.082\,\frac{atm\cdot L}{mol\cdot K}\right)\cdot (304.65\,K) }{60\,L}[/tex]

[tex]P = 8.327\times 10^{-3}\,atm[/tex]

The pressure inside the cylinder is [tex]8.327\times 10^{-3}[/tex] atmospheres.

The value for R for this problem is 0.082 atmosphere-liters per mol-Kelvin.

Answer:

7.85 g/cm³

Explanation:

Density is Mass/Volume

The mass is 212 grams

The volume is 27 cm³ (3 x 3 x 3 = 27)

212/27 = 7.851851852

We can estimate this to 7.85 g/cm³

Density is simply defined as the mass of a substance per unit volume of substance. It is expressed mathematically as:

[tex]Density = \frac{Mass }{Volume }[/tex]

To solve the question given above, we'll begin by calculating the volume of the iron. This can be obtained as follow:

Dimension = 3.0 cm by 3.0 cm by 3.0 cm

Volume = 3 × 3 × 3

Thus, the volume of the iron is 27 cm³

Finally, we shall determine the density of the iron as follow:

Mass of iron = 212 g

Volume of iron = 27 cm³

[tex]Density = \frac{Mass}{Volume } \\\\Density = \frac{212}{27}[/tex]

Therefore, the density of the iron is 7.85 g/cm³

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Answer:

Nuclear energy

I'm not sure ok.. Better ask some adult for making sure.

Answer:

it is D. Reactant

Explanation:

Answer:

D

Explanation:

A chemical reaction is a process in which one or more substances, also called reactants.

Answer:

Chemical Equation: (NH4)2S(aq) + 2KOH(aq) -> K2S(aq) + 2NH4OH(s)

Complete Ionic Equation: 2NH4^+(aq) + S^2-(aq) + 2K^+(aq) 2OH^-(aq) -> 2K^+(aq) + S^2- (aq) + 2NH4OH(s) 2NH4^+(aq) + OH^-(aq) -> NH4OH(s)

Explanation:

Answer:

A is the answer to your question

They usually have crystals since they are formed from lava

Answer:

physical

Explanation:

no chemical reaction is happening

Answer:

molecular collisions that have very specific orientations

Explanation:

Based on the collision theory, a high frequency of effective collision is dependent on the molecular collisions that have very specific orientations.

Answer:

C. molecular collisions that have very specific orientations

Explanation:

Answer:

Explanation:

Groundwater spread over the years

Answer:

Bromine

Explanation:

Br2 is an oxidizing agent, Na is a reducing agent.