How does the boiling point of HBr compare to KBr ?

The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group

Answer & Explanation:

The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.

Answer:

A.

Explanation:

In conclusion, an electrically neutral object is an object that has a balance of protons and electrons. In contrast, a charged object has an imbalance of protons and electrons. ... The type of charge(positive or negative) is determined by whether the protons or the electrons are in excess

Dear God, the person reading this is kind and I’m proud of them . Please help them live life to the fullest and bless her in their chosen field. Now, you’re on the clock.❤❤❤ In 9 minutes something will make you happy. Please share this with 15 people you love. Remember, . If I don’t get this back I’m obviously not a close friend. Now, I have a game for you, it’s been played since 1977. Once you read this, you have to send it to 15 people. Your next 5 days will be like this: Day 1 - you will wake up to the biggest shock of your life. Day 2 - you will cross paths with an old friend you have missed. Day 3 - you will find yourself with a lot of money. Day 4 - your day will be perfect. Day 5 - the person u like the most in your life will spend lots of time with you. If you don’t forward this, your next 5 days will be the exact

Answer:

First, we need to determine the molar mass of HCl.

The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.

Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:

6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles

Finally, we can use the molar mass to convert moles to grams:

10 moles x 36.45 g/mol = 364.5 grams

Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.

Answer:

Aluminum can be extracted from bauxite ore.

Explanation:

The atomic number of each element is written above the symbol. A period is a horizontal row of the periodic table. ... A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. There are a total of 18 groups.

The final concentration of the reactant of a first order reaction can be determined from the rate constant equation. The concentration of ammonium carbonate after 39 s will be 0.003 M.

Rate constant of a reaction is the rate of reaction when one molar concentration of the reactant is involved in the reaction. The expression for the rate constant k for first order reaction is :

k = 1/t ln (C0/Ct)

Where C0 be the initial concentration and Ct be the concentration after t seconds.

Given that C0 of ammonium nitrate = 0.957 M

rate constant = 0.196 /s

t = 39 s.

The concentration after 39 seconds is calculated as follows:

0.196 /s = 1/39s ln (0.957 M / Ct)

Ct = 0.957 / (ln⁻¹ (0.196 × 39))

    = 0.003 M.

Therefore, the concentration of ammonium carbonate after 39 seconds will be 0.003 M.

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Answer:

for the first question, the context is necessary in order to answer...

Fat is immiscible (does not mix) with water because fat is nonpolar and water is polar (remember like dissolves like: polar mixes with polar, nonpolar with nonpolar).

soap bubbles by having many soap molecules surround fat molecules with their nonpolar end, and direct their polar ends outwards.

For your second question:

Dirt and oil are nonpolar.  When we wash our bodies with water (which is polar) it does not do a good job in removing these nonpolar molecules.  Soap, on the other hand, has a long nonpolar end and a small polar end.  The nonpolar end of the soap molecule attaches to the dirt and oil on your skin and when the water from the shower head hits the soap, it pulls the dirt, oil, and soap off of you by attaching itself to the polar end of the soap molecule.

Explanation:

Answer:

so so

Explanation:

this your question?? <_>

Answer:

1.01×10⁻¹⁶ moles (to 3 significant figures)

Explanation:

Using avocado's constant, we can use it to find the number of moles (x) for 61,000,000 atoms of Ne:

1 mole = 6.02×10²³ atoms

x = 61,000,000 atoms

We can solve this by cross-multiplying:

6.02×10²³ × x = 1 × 61,000,000

6.02×10²³x = 61,000,000

To solve for x, divide both sides by 6.02×10²³x:

\( \frac{6.02×10²³x}{6.02×10²³} = \frac{61,000,000}{6.02×10²³ } \)

This cancels out both 6.02×10²³ on the left

\(x = \frac{61,000,000}{6.02×10²³ } \)

\(x = 1.01 \times 10⁻¹⁶\)

The final temperature of a 100g strip of alloy made up of iron and copper is 67.34°C.

Calorimetry is the science of measuring the heat absorbed or evolved during the course of a chemical reaction or change of state.

The temperature of a substance using calorimetry procedure can be calculated as follows:

Q = mc∆T

Where;

According to this question, a 100g strip of alloy containing iron and copper in equal amounts is placed in a burner that supplies 4.0kJ of heat.

4000 = 100 × (0.46 + 0.385) × {T - 20°C}

4000 = 84.5 {T - 20°C}

4000 = 84.5T - 1690

84.5T = 5690

T = 67.34°C

Therefore, 67.34°C is the final temperature of the alloy.

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They give us the weight of carbon dioxide that removes 1 acre of algae. To determine moles we are going to convert the weight from tons to grams and then divide it by the molar mass of carbon dioxide.

We take in count following:

1ton=1x10^6g

1molCO2=44.01g

1year=365days

So, the moles that 1 acre of algae removes in a year will be:

Answer: In a year, are removed 2.2 x10^7 moles of carbon dioxide

Answer:

Explanation:

Since density = mass/volume

Mass of solution = density x volume = (1.19)(54.0) = 64.26 g

Mass of HCI = (64.26)(0.3721) = 23.9 g

Answer:

Natural frequency

Explanation:

Answer:

Resonance

Explanation:

Four Hydrogen atoms are present in the molecule (Furan) shown below.

Furan is a heterocyclic organic compound with a five-membered ring containing four carbon atoms and one oxygen atom. It has the chemical formula C4H4O. Furan is a colorless, volatile liquid with a distinctive aromatic odor. Coal tar and organic material burning make it.

Furan is utilised in resins, polymers, and solvents. Furan is poisonous and carcinogenic, hence its use and exposure must be carefully controlled.

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Answer:

Object 1 = Moving Towards Earth

Object 2 = Moving Away From Earth

Object 3 = Moving Towards Earth

Explanation:

When you look at emission spectras, look at where the observed lines are in comparison to the element (stationary) lines. Ones that have observed lines closer to the left are moving towards you and ones with observed lines closer to the right are moving away from you.

Based on the nature of the indicator Bromophenol blue,

An indicator is a organic dye which changes colour according to the pH of the medium it is present in.

Examples of indicators include:

Bromophenol blue is an acid–base indicator whose range of colour change lies between pH 3.0 and 4.6.

It changes from yellow at pH 3.0 to blue at pH 4.6.

Therefore, Bromophenol blue is a useful indicator between pH range 3.5 ⇌ 4.6.

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Answer:

1. It is blue in a base and yellow in an acid

2. Additional acid will change the blue color into a yellow color.

3. The acid included has hydrogen ions that provide concentration that increases and makes the equilibrium shift towards it which removes the excess hydrogen ions and causes the solution to become yellow.

4. The addition of the base causes the yellow to go to a blue color.

5. Hydroxide ion concentration means the solution will become blue as well.

6. The equilibrium will become blue since it has th reoccurring change at the end of the lab.

Explanation:

Hope this helps, have a great summer!

Tyndall effect is the scattering of light by colloidal particles. Colloids are mixtures in which one substance is dispersed evenly throughout another substance.

Solutions are a type of mixture that appear homogeneous and do not exhibit the Tyndall effect. On the other hand, suspensions and colloids do not appear homogeneous and do exhibit the Tyndall effect.

Based on the information given, Sample 1 shows yes for both filtering and settling, which means it is a heterogeneous mixture, and therefore not a solution.

Sample 2 does not show the Tyndall effect and does not settle, which means it is a homogeneous mixture, and therefore a solution. Sample 3 shows the Tyndall effect but does not settle, which means it is a heterogeneous mixture, and therefore not a solution.

Therefore, the sample that represents a solution and does not exhibit the Tyndall effect is Sample 2, and the answer is A. Sample 2.

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Layer 1 because it is closest to the surface

Exothermic refers to chemical interactions that aerobic respiration. Combustion reactions release higher energy. Endothermic refers to atoms and molecules that either use or absorb reactive power.

A chemical process known as an endothermic releases energy as heat or light. It is an endothermic reaction's opposite. Chemical equation expressed as reactants + products + energy. An reaction mechanism is one in which electricity is given off as light or warmth.

A response is deemed to be exothermic if it produces heat while also undergoing a net decrease in basic enthalpy change. Samples include those type of combustion, iron rust, including water froze. Exothermic processes are those that discharge heat and energy into the surroundings.

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To solve this problem using the gas laws, we need to use the Ideal Gas Law. This law states that the product of the pressure and the volume of a gas is proportional to the absolute temperature.

The equation of the Ideal Gas Law is the following:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{\dfrac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} } \end{gathered}$} }\)

Where:

We clear for V₂:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{P_1V_1T_2}{P_2T_1 } } \end{gathered}$} }\)

Where:

Substituting the known values:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760\not{kPa}\times0.050 \ L\times20.0\not{k} }{ 380\not{kPa}\times10.0\not{k} } } \end{gathered}$} }\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760 \ L}{3800 } } \end{gathered}$} }\)

\(\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2\approx0.2 \ Liters} \end{gathered}$} }}\)

Answer:

Magnetivity and melting point.

Explanation:

Aluminum, steel and tin cans can be separated by two step process of magnetisation and melting point, because the three cans have different magnetic properties.

Steel attract to magnet easily because of it's has magnetic properties and these separate steel from aluminum.

Neither steel and aluminum melted at 300°C but Tin melt at that temperature.

Answer:

C) 2.99 cm^3

Explanation:

ρ=m/V

V=m/ρ=59.2/19.8=2.99 cm^3

Answer:

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it takes specific amount of energy to remove exactly one electron from an atom.

What is electron?

Electron is a stable sub atomic particle with a charge of negative electricity found in all atoms and acting as the primary Carrier of electricity in solid.

1-This is shown by the equation where the orbit of the electron around a proton is equal to the quantum. The quantities energy level, times a wavelength.

2-So this is this equation and then abruptly hypothesis links quantities. Energy states with a standing wave function so as that the energy of the election on increases its orbit must also increase.

3- And as considering the wavelength, we're assuming station is constant. Two pies are the only constants, and they aren't changing. It does.

4-As the energy or quantifies energy level of an electron increases its radius around the nucleus must increase.

5- Also, if its energy level decreases, its radius must also decrease. So this hypothesis ties together quantities, energy levels and the relationship and its relationship with the size of the circumference around it. A nucleus which is also the electron.

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the equation is not present.

There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).

The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.

Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.

Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.

In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.

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It would take 22g of sodium hydroxide (NaOH) to make 16g of the antacid milk of magnesia (magnesium hydroxide).

In the field of chemistry known as stoichiometry, desired quantitative data is ascertained by using relationships between the reactants and/or products of a chemical reaction. Stoichiometry literally translates as the measure of elements because the Greek words stoikhein and metron both mean element and measure, respectively.

In a chemical reaction, the total mass of reactant and product are equal, according to the statement, and neither is generated nor destroyed. This is the stoichiometric law, and also the law of conservation of mass.

\(16 \mathrm{~g} \text { of } \mathrm{Mg}(\mathrm{OH})_2 \times \frac{1 \mathrm{molMg}(\mathrm{OH})_2}{58.3 g \mathrm{gg}(\mathrm{OH})_2} \times \frac{2 \mathrm{~mol} \mathrm{NaOH}}{1 \mathrm{molMg}(\mathrm{OH})_2} \times \frac{40 \mathrm{gNaOH}}{\mathrm{molNaOH}}=22 \mathrm{~g}\)

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Answer:

cause they like it that way

Explanation:

btw cant tell if this is legit or not

Answer:

0.0238 moles NaOH

Explanation:

To find the amount of moles, you need to

(1) convert the volume from mL to L (1,000 mL = 1 L)

(2) calculate the amount of moles (using the molarity equation)

It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs.

 125.0 mL NaOH                  1 L
---------------------------  x  ---------------------  =  0.1250 L NaOH
                                         1,000 mL

Molarity = moles / volume (L)                    <----- Molarity equation

0.190 M = moles / 0.1250 L                       <----- Insert values

0.0238 = moles                                         <----- Multiply both sides by 0.1250