The first chemical equation was designed by

Answer:

To determine the number of significant figures in a number use the following 3 rules:

To determine the number of significant figures in a number use the following 3 rules:Non-zero digits are always significant.

To determine the number of significant figures in a number use the following 3 rules:Non-zero digits are always significant.Any zeros between two significant digits are significant.

To determine the number of significant figures in a number use the following 3 rules:Non-zero digits are always significant.Any zeros between two significant digits are significant.A final zero or trailing zeros in the decimal portion ONLY are significant.

Answers:

1.

The mole ratio of AlCl₃ to Cl₂ is 2 : 3. This means for production of every 2 moles of AlCl₃ 3 moles of Cl₂ is consumed. Hence, if 3 moles of AlCl₃ is produced then Cl₂ consumed is,

                               = 3 × 3 / 2

                               = 4.5 moles of Cl₂

2.

Mole ratio of C₃H₈ to CO₂ is 1 : 3.

Hence, 0.5 moles of C₃H₈ will produce 1.5 moles of CO₂.

Also,

At STP one mole of an ideal gas occupied 22.4 L of volume. Hence, 1.5 moles of CO₂ gas will occupy,

Volume = 1.5 mol × 22.4 L/mol

Volume = 33.6 L of CO₂

The question is confusing, but if you are saying that the heat of vaporization is 393 joules per gram, and 30 grams condense, then the answer is simply 30 * 393 = 11790 joules.

Based on the given data, the amount of products from 5.00 g of KClO₃ is:

The decomposition of KClO₃ is given by the equation below:

2 KClO₃  -----> 2 KCl + 3 O₂

2 moles of KClO₃ produces 2 moles of KCl and 3 moles of O₂

Molar mass of KClO₃ is 122.5 g/mol

molar mass of KCl = 74.5 g

molar mass of O₂ = 32 g

Moles of KClO₃ in 5.00 g = 5.00/122.5

For KCl

a. moles: 0.04 moles of KClO₃ will produce 0.04 moles of KCl

b. mass of KCl = 0.04 * 74.5 = 2.98 g KCl

c. number of molecules of KCl = 0.04 * 6.02 * 10²³ = 2.41 * 10²² molecules of KCl

For O₂:

a. moles of O₂; 0.04 moles of KClO₃ will produce = 0.06 moles of O₂.

b. mass of O₂ = 0.06 * 32 g = 1.92 g of O₂

c. number of molecules: 0.06 * 6.02 * 10²³ = 3.61 * 10²² molecules of O₂

Therefore, the amount of products from 5.00 g of KClO₃ is:

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There are 237. 5 g of Sulfur,S in 475 g of SO2?

From the question, we can say that

Therefore,

The molar mass for SO2 = 32 + (16 × 2) g/mol  = 64 g/mol

Now,

If 1 mole of SO2 contains 1 mole of S

Then 64 g of SO2, will contain 32g of S;

Such that

475 g of SO2 will give { [tex]\frac{ 32g of S) ( 475 g of SO2)}{64 of SO2}[/tex] }  = 237. 5 g of Sulfur.

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The correct numbers to the significant digits are:

[tex] \frac{485.60}{0.78} = 622.56[/tex]g/ml

[tex] 2.09 \times 0.2 = 0.42[/tex]g

[tex] \frac{396.0}{0.85 } = 465.88[/tex]g/ml

Grams(g) is used for the measurement of mass while milliliters(ml) is used for the measurement of volume of liquids.

The above answers are in two significant digits which are the figures that  are meaningful in terms of accuracy.

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Answer:

To achieve greater stability, atoms will tend to completely fill their outer shells and will bond with other elements to accomplish this goal by sharing electrons, accepting electrons from another atom, or donating electrons to another atom.

Explanation:

A buffer is a solution which resists changes to it pH when a small quantity of acid or base is added to it.

A buffer is a solution which resists changes to it pH when a small quantity of acid or base is added to it.

Buffers are made from solutions of weak acids and their salts or weak bases and their salts.

The pH of a solution is the negative logarithm to base 10 of yhe hydrogen ion concentration of the solution.

Solutions of low pH have high concentration of hydrogen ions while solutions of high pH have high hydrogen ion concentration.

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The true molecular formula of the compound is C₂ClF₅

The number of mole can be obtained as by using the ideal gas equation as illustrated below:

n = PV / RT

n = (0.978 × 0.428) / (0.0821 × 297.3)

n = 0.017 mole

Molar mass = mass / mole

Molar mass = 2.650 / 0.017

Molar mass = 155.88 g/mol

Divide by their molar mass

C = 15.5 / 12 = 1.292

Cl = 23 / 35.5 = 0.648

F = 61.5 / 19 = 3.237

Divide by the smallest

C = 1.292 / 0.648 = 2

Cl = 0.648 / 0.648 = 1

F = 3.237 / 0.648 = 5

Thus, the empirical formula of the compound is C₂ClF₅

Molecular formula = empirical × n = molar mass

[C₂ClF₅]ₙ = 118.084

[(12×2) + 35.5 + (19×5)]ₙ = 155.88

154.5n = 155.88

Divide both side by 154.5

n = 155.88 / 154.5

n = 1

Molecular formula = [C₂ClF₅]ₙ

Molecular formula = [C₂ClF₅]1

Molecular formula = C₂ClF₅

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Answer:

71 percent of earth is covered by water and just incase you dont know i believe 29 percent is land

[tex]\\ \sf\longmapsto PV=nRT[/tex]

[tex]\\ \sf\longmapsto 4.67(2)=0.66(8.314)T[/tex]

[tex]\\ \sf\longmapsto 9.34=5.48T[/tex]

[tex]\\ \sf\longmapsto T=1.7°C[/tex]

Key words

Answer:

It is an area that is covered in grasses and wildflowers that receives enough rainfall to support the grassland but not the growth of trees.

Explanation:

Best description of a temperate grassland ecosystem is an area that is covered in grasses and wildflowers that receives enough rainfall to support the grassland but not the growth of trees.

Temperate grasslands are one of the most important biomes to understand. They play an important role in our survival. They also play an important role in helping to manage climate change.

Different types of grasslands have some similar characteristics. Savannas have scattered trees and exist in certain parts of Africa, South America, Australia, and Asia. Temperate grasslands are largely devoid of trees with less rainfall than savannas.

Steppes have shorter grasses whereas prairies have taller grasses due to higher precipitation. Both types of temperate grasslands exist throughout North America and Europe.

Therefore, best description of a temperate grassland ecosystem is an area that is covered in grasses and wildflowers that receives enough rainfall to support the grassland but not the growth of trees.

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#SPJ3

if people like the smell of burning wood, then they would not like the smell of gasoline

Explanation:

it's a supposition without any real truth to back it up

The valid hypothesis is If Earthquakes occur, then tornados could occur at the same time. The correct option is A.

A hypothesis is an explanation proposed for a phenomenon. The scientific method needed that a hypothesis should be testable in order for it to be considered a scientific hypothesis.

Scientists typically base scientific hypotheses on previous observations that cannot be adequately explained by existing scientific theories.

In an experiment, a hypothesis is utilized to illustrate the relationship between two variables.

A hypothesis's goal is to find an answer to a question. A formalized hypothesis will force us to consider what outcomes we should expect from an experiment. The independent variable is the first variable.

The valid hypothesis is that if earthquakes occur, tornadoes may follow.

Thus, the correct option is A.

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Answer:

243

Explanation:

?

Explanation:

n2 ×2b is the only solution

Answer:

C - H2O(l)

Explanation:

im smart

Answer:The environmental problems directly related to energy production and   Electricity is a secondary energy source that is generated  producedfrom primary energy sources:

hope that helps im new so have a good day (:

Explanation:

Answer:

There is just one atom of that element in a molecule of that compound.

Explanation:

Answer:it has eleven electrons

Explanation:

[tex]\\ \tt\bull\rightarrowtail 0.056\times 10^{-6}[/tex]

[tex]\\ \tt\bull\rightarrowtail 0.56\times 10^{-7}[/tex]

[tex]\\ \tt\bull\rightarrowtail 5.6\times 10^{-8}[/tex]

Done

1) convert cm to m

[tex]= 758,422,344\ cm\ x\ \frac{1\ m}{100\ cm} \\= 7,584,223.44\ m[/tex]

2) sig figs

When making a bigger number smaller, the exponent will be a positive number.

The answer will be [tex]7.58[/tex] × [tex]10^{6}[/tex] meters after rounding

The name for NaCl is Sodium chloride

Salt is defined as the chemical compound that contains both a positively charged cation.and negatively charged anion.

It is formed by the reaction of acid and base is a neutralisation reaction.

Examples of salt include:

Therefore another name for salt is common salt.

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1) determine molar mass of K₃PO₄

[tex]=3(39.10)+30.97+4(16)\\=212.27\ g/mol[/tex]

2) determine total mass of potassium atoms in K₃PO₄

[tex]=3(39.10)\\=117.3\ g[/tex]

4) divide by molar mass and multiply by 100

[tex]=\frac{117.30}{212.27}[/tex] × [tex]100[/tex]

= 55.25981062% (round as you wish)

To melt 8952 g of water, 2.986 × 10⁶ J of heat are required.

The heat of fusion is the heat absorbed by a unit mass of a given solid at its melting point that completely converts the solid to a liquid at the same temperature.

8952 g of water melt, that is, they undergo fusion.

We can calculate the amount of heat absorbed in this process using the following expression.

Q = ΔH°f × m = 333.55 J/g × 8952 g = 2.986 × 10⁶ J

where,

To melt 8952 g of water, 2.986 × 10⁶ J of heat are required.

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Answer:

22.8 in3 to cm3

= 373.6251 cm3

Answer:

true

Explanation:

because heat tempeture wise it can cool down

Answer:

Correct:

Explanation:

A Nonpolar Covalent Bond is made when molecules share their electrons similarly. This ordinarily happens when two particles have comparable or the same electron fondness. The closer the values of their electron fondness, the more grounded the fascination. This occurs in gas atoms, moreover known as diatomic components.

I hope this helps :) If it doesn't, tell me in the comments below what I need to fill in :)

Answer:

San Diego boasts top crops in nursery, flowers, avocados, tomatoes, citrus, chickens & eggs, shrooms, succulents, strawberries, coffee & cannabis. Most of San Diego County farms are small 1-9 acre proprieties, and that awards San Diego County more certified organic growers than any other county in the nation.