Determine the molarity of a solution made by dissolving 63.8 g of Sr(ClO3)2 in enough water to make 500.0 mL of solution.

Answer: Usually, the rock pieces, called sediments, drop from the wind or water to make a layer. The layer can be buried under other layers of sediments. After a long time the sediments can be cemented together to make sedimentary rock. In this way, igneous rock can become sedimentary rock.

Explanation:

Answer:

\(8.97x10^{22}molecules C_3H_8\)

Explanation:

Hello there!

In this case, according to the given chemical reaction and the fact that 22.4 L of a gas are occupied by 1 mol at standard pressure and temperature conditions, it will be possible for us to calculate the number of molecules of propane, by using the Avogadro's number, the 1:3 mole ratio with carbon dioxide and the aforementioned volume-mole ratio to obtain:

\(10.01LCO_2*\frac{1molCO_2}{22.4LCO_2}*\frac{1molC_3H_8 }{3molCO_2} *\frac{6.022x10^{23}molec\ C_3H_8}{1molC_3H_8} \\\\=8.97x10^{22}molecules C_3H_8\)

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Answer:

39.095

Explanation:

this is because all this isotopes belong to a single element thus

(38.96×93.26)+(39.96×0.012)+(40.96×6.73)

answer of that divided by 100%

Answer:

Calcium Oxide is a drying agent, hence it dehydrates the reaction to give pure solid Iron ( III ) chloride, which cannot be done by calcium chloride.

It preferred to use calcium oxide rather than calcium chloride in preparation of iron (III) chloride because Calcium Oxide is a drying agent, hence it dehydrates the reaction to give pure solid Iron ( III ) chloride, which cannot be done by calcium chloride.

A process such as a chemical reaction that removes water.The atoms which constitute the molecule of water that is removed.

Hence,It preferred to use calcium oxide rather than calcium chloride in preparation of iron (III) chloride because Calcium Oxide is a drying agent,

Thus, it dehydrates the reaction to give pure solid Iron ( III ) chloride, which cannot be done by calcium chloride.

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Answer:

Speeds up when temperature is increased and can travel through a solid

Explanation:

Answer:

Mineral deficiencies can lead to a variety of health problems, such as weak bones, fatigue, or a decreased immune system.

Explanation:

There are five main categories of mineral deficiency: calcium, iron, magnesium, potassium, and zinc.

One major cause of mineral deficiency is simply not getting enough essential minerals from food or supplements.

Answer:

it can lead to a variety of health problems, such as weak bones, or a decreased immune system.

Explanation:

Energy transformation is the process by which energy is converted from one form to another, such as when water kinetic energy is converted into electrical energy in a hydroelectric dam.

Electrical energy (for a stove), kinetic energy (for a car), electricity (for a power plant), and mechanical energy are all created from chemical energy (space shuttle). Kinetic energy is created by converting electrical energy. Electricity is transformed into Music, Light, and a lightbulb (TV).

Electrical energy is transformed into thermal energy by appliances like a stove, electric toaster, and flat iron. Electric energy is transformed into sound and light energy by a television.

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A variable within a scientific experiment is something that is changed (i.e. it varies). There should be only one manipulated variable within a scientific experiment so that the experimenter can be certain it is this variable which causes a pattern in the resultant data, if any exists at all.

HOPE IT HELPS PLZ BRAINLIEST

Answer:

only god knows

Explanation:

In the given reaction, the reactants are hydrochloride acid (HCI) and sodium hydroxide (NaOH). The products are sodium chloride (NaCl) and water.

The chemical equation provided represents a neutralization reaction between hydrochloric acid (HCI) and sodium hydroxide (NaOH) in aqueous solution.

A neutralization reaction is a type of double displacement reaction in which an acid and a base react to form salt and water.

The reactants in this equation are hydrochloric acid (HCI) and sodium hydroxide (NaOH). Hydrochloric acid is a strong acid that dissociates in water to form hydrogen ions (H+) and chloride ions (Cl-). Sodium hydroxide, on the other hand, is a strong base that dissociates in water to form sodium ions (Na+) and hydroxide ions (OH-).

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Explanation:

1. It was as a result of a blurry picture of the DNA eye made by scientist, Maurice Wilkins, this glimpse of the DNA made James Watson even more curious about the DNA.

2. They were considered an unlikely pair due to their age difference of about 12 years. Seemed unlikely because there was a 12 year age difference. However, they are considered a perfect team to solve the structure since James Watson has a strong background in biology, while Francis Crick is an expert in x-ray crystallography.

3. Other researchers also racing to find the structure include;

4. It is important to note that the data provided by Rosalind Franklin enabled Watson and Crick to better understand the chains that make up the DNA.

5. In the year, 1962 they were awarded the Nobel prize in Physiology and Medicine. They were only three recipients because at the time they were the only living early contributors to the study of the DNA.

Structure of the DNA.

DNA is a molecule that is made by the combination of the two poly chains that coils to each other forming a double helix having genetic matter. James Watson is an American molecular biologist and a geneticist. Hence has done a study on the DNA.

Thus the answer is Watson was curious about DNA, Francis was an expert in X-ray crystallography,  Franklin, and Linus Pauling. found this structure. In 1962 Nobel prize was given.

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Answer:

Explanation:

Let's review the name of the compound to draw it:

4,4 - dibromo: we have 2 bromines (Br) in the structure, both in carbon 4.

1 - chloro: we have 1 chlorine (Cl) in carbon 1.

pentan: this is the prefix that indicates the number of carbons of the principal chain, in this case, pentan indicates 5 carbons.

2 - one: The suffix one indicates that we have a ketone. In this case, carbon 2.

Based on this analysis, let's draw the molecule:

The electrons move from left to right through the circle labeled "M" to reach the cathode, where reduction takes place.

If oxidation occurs on the left side of the fuel cell and reduction occurs on the right side, the movement of electrons can be described as follows: Electrons move from left to right through the circle labeled "M."

In a fuel cell, the process of oxidation takes place at the anode (labeled A) where the fuel is oxidized, releasing electrons. These electrons then flow through the external electrical circuit, represented by the wire connecting objects A and B. The electrons reach the cathode (also labeled A) on the right side of the cell, where reduction occurs.The circle labeled "M" represents the membrane or electrolyte in the fuel cell. This membrane allows the transport of ions but blocks the movement of electrons. As a result, electrons cannot flow directly through the electrolyte but must travel through the external circuit.

This movement of electrons through the external circuit is what generates an electric current that can be used to power electrical devices or systems.

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Chlorine and Aluminum atoms shielding effect on their outer electrons is in chlorine there is 7 electron and in aluminum there is poor shielding effect so the greater size of aluminum

An electron is the s sublevel shied electron present in the p sublevel of the same principal energy level and the electron shielding refer to the blocking of valence shell electron attraction by the nucleus due to the presence of inner shell electron and electron in an s orbital can shielding p electron at the same energy level because of the spherical shape of the s orbital and valence electron are the number of electron present in the outermost shell of an atom and now the last shell of the chlorine atom has 7 electron in it and in aluminum there is poor shielding effect so the greater size of aluminum

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Answer:

C 1,868 years

Explanation:

I just took the test - I tried doing the math and was close but couldn't get it exact; so I guessed and I was correct :)

Answer:

1,868 years

Explanation:

Answer:

Explanation:

-We convert Ca(OH)₂ grams to moles using its molar mass:

-We convert K₂SO₃ moles to grams using its molar mass:

-One formula unit of HCl is HCl. We convert molecules to moles using Avogadro's number:

-At STP, one mol of any gas occupies 22.4 L:

Answer: Two substances have different properties because they are made of different types and numbers of atoms that repeat.

Explanation: According to the article “Atomic Zoom-In”, all matter is made of tiny pieces called atoms, and there are 118 different types of atoms in the universe. Every substance is made of a unique combination of atoms, which can be represented by a chemical formula. The chemical formula shows the types and numbers of atoms that repeat to make up a substance.

For example, water has a chemical formula of H2O, which means it is made of groups of 2 hydrogen atoms and 1 oxygen atom. Substances have different properties because they are made of different types and numbers of atoms that repeat.

For example, water and ethanol are both clear liquids, but they have different properties such as boiling point, density, and flammability. This is because water is made of H2O groups, while ethanol is made of C2H6O groups.

The different types and numbers of atoms affect how the molecules interact with each other and with other substances, resulting in different properties. Therefore, to explain why two substances have different properties, we need to look at their chemical formulas and see how their atoms differ.

Hope this helps, and have a great day! =)

Answer:

12.23moles in 1000cm3

Explanation:

Mass=moles×molermass

538=44xY

Y=538÷44

Y=12.23moles in 1000cm3

Answer:

1.3 moles

Explanation:

pv = nrt

n = pv/rt

n = (125 * 25) / (8.3144598 * 289)

n = 1.3 moles

Answer: 0.27 moles of CO2 and 11.88 grams of CO2

Explanation: Use the Ideal Gas Law, PV = nRT, substitute the values given and solve.

I can't seem to upload procedure but:

P = 1.5atm

V = 4.5L

n = moles

R = 0.0821gr/mol (when using atm, kPa is 8.31)

T = 300K

Isolate what you don't have, in this case n. Change PV = nRT to PV/RT = n. Substitute the values to get moles. Once you have this, multiply the value by the molar mass of CO2 (44gr/mol) to get the mass of CO2 in grams.

Answer:

Chemical Change

Explanation:

Chemical changes occur when bonds are broken and/or formed between molecules or atoms. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.

Answer: 57.8g

Explanation:

We can find molar mass by adding up the masses of each component, nitrogen is 14 and hydrogen is 1, this gives us 17g/mol.

Multiplying molar mass by number of moles will give us the grams in that many moles, 3.4x17=57.8g.

Answer:

n = 3.25 mol

Explanation:

Given data:

Pressure of sample = 2 atm

Volume of sample = 40 L

Temperature = 300 K

Number of moles = ?

Solution:

PV = nRT

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

2 atm ×40 L = n × 0.0821 atm.L/mol.K × 300 K

80 atm.L = n  × 24.63 atm.L/mol

n = 80 atm.L  /24.63 atm.L/mol

n = 3.25 mol

Answer:

car 2/red

Explanation:

give me crown

Answer: it think it would be last one.  the mouth to the stomach is the answer.

Explanation:

Answer:

The correct answer is D! The esophagus connects the mouth to the stomach.

Explanation:

The mouth is connected to the esophagus, which in turn is connected to the throat. The throat, in turn, connects the mouth to the stomach.

I had this on a science test and I got it right :D

I hope this helps! ;)

Answer:

a variable (often denoted by x ) whose variation does not depend on that of another.

Explanation:

You can think of independent and dependent variables in terms of cause and effect: an independent variable is the variable you think is the cause, while a dependent variable is the effect. In an experiment, you manipulate the independent variable and measure the outcome in the dependent variable.For example, someone's age might be an independent variable. Other factors (such as what they eat, how much they go to school, how much television they watch) aren't going to change a person's age.

The density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.

To determine the density of ammonia gas (NH3) in a 6.0 L container at a pressure of 820 mm Hg, we need to use the ideal gas law equation, which relates pressure, volume, number of moles, and temperature for a given gas.

The ideal gas law equation is:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Since we are given the pressure (820 mm Hg), volume (6.0 L), and assuming standard temperature and pressure (STP), we can use the values for R (0.0821 L·atm/(mol·K)) and convert the pressure to atm by dividing by 760 (1 atm = 760 mm Hg).

820 mm Hg / 760 mm Hg/atm = 1.08 atm

Now we can rearrange the ideal gas law equation to solve for density (d):

d = (P * M) / (RT)

Where M is the molar mass of ammonia (NH3), which is approximately 17.03 g/mol.

Substituting the values, we have:

d = (1.08 atm * 17.03 g/mol) / (0.0821 L·atm/(mol·K) * 298 K)

Simplifying the equation, we find:

d ≈ 0.805 g/L

Therefore, the density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.

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