what is the missing product from this reaction? 22888 ra → _____ 42 he

I think and I'm sure it is gases

Answer:

gasses

Explanation:

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There are 0.5 moles of helium atoms present in 11.2 L of Helium gas at Standard Temperature Pressure.

At STP (Standard Temperature and Pressure), which is defined as 0°C (273.15 K) and 1 atm of pressure, one mole of any gas occupies a volume of 22.4 L. Therefore, we can use the following formula to calculate the number of moles of helium atoms present in 11.2 L of He gas at STP:

n = V/ Vm

where n is the number of moles of helium atoms, V is the volume of the gas (11.2 L), and Vm is the molar volume of the gas at STP (22.4 L/mol).

Substituting the values, we get:

n = 11.2 L / 22.4 L/mol

n = 0.5 mol

Therefore, there are 0.5 moles of helium atoms present in 11.2 L of He gas at STP.

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Answer:

Isotope 2

Explanation:

Isotope 2 is the most abundant. Its percent abundance is 78.68% which is the largest percentage, and therefore the most common of the isotopes presented.

Good luck!

Answer:

The answer IS 0.0000035505. Hope it helps!

Explanation:

Answer: if you put it in a caculator you would get 0.0045 x 0.000789= 0.0000035505

Explanation:

480 mL of the HCl solution with a pH of 1.3 can be neutralized by one dose of milk of magnesia assuming the concentration of magnesium hydroxide is 0.2 M.

To determine the volume of \(HCl\) solution that can be neutralized by milk of magnesia, we need to know the concentration of the milk of magnesia.

Assuming milk of magnesia is a suspension of solid magnesium hydroxide in water, we need to know the concentration of magnesium hydroxide \((Mg(OH)2)\) in the suspension.

Let's assume that the concentration of magnesium hydroxide in milk of magnesia is 0.2 M.

The balanced chemical equation for the neutralization reaction between \(HCl\) and\(Mg(OH)2\)is:

\(2HCl + Mg(OH)2 - > MgCl2 + 2H2O\)

From the equation, we can see that two moles of \(HCl\) react with one mole of \(Mg(OH)2\).

To determine the volume of \(HCl\) solution, we need to calculate the number of moles of \(Mg(OH)2\) in one dose of milk of magnesia:

0.2 M = 0.2 moles / liter

Let's assume one dose of milk of magnesia is 30 mL, or 0.03 L. Then the number of moles of \(Mg(OH)2\) in one dose is:

0.2 moles / L x 0.03 L = 0.006 moles Mg(OH)2

Therefore, this amount of \(Mg(OH)2\) would require:

2 x 0.006 = 0.012 moles of \(HCl\) for complete neutralization

Now, let's calculate the volume of \(HCl\) solution needed to provide 0.012 moles of \(HCl\).

The volume of \(HCl\) solution can be calculated using the balanced chemical equation and the molarity of the \(HCl\) solution:

2 moles HCl / 1 mole \(Mg(OH)2\) x 0.012 moles \(Mg(OH)2\) / 1 = 0.024 moles HCl

\(pH = -log[H+]1.3 = -log[H+]\\[H+] = 5 x 10^-2 M\)

Now we can calculate the volume of the HCl solution using the equation:

moles = concentration x volume

0.024 moles = \(5 x 10^-2 M x volume\)

volume = 0.48 L or 480 mL

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The shrinking of a strawberry from water loss after being sprinkled with sugar is an example of osmosis.

Osmosis is the movement of water from an area of high water concentration to an area of low water concentration. When sugar is sprinkled on a strawberry, the sugar molecules draw water out of the strawberry cells. This causes the strawberry to shrink.

Osmosis is a common process that occurs in living cells. It is important for the transport of nutrients and waste products in cells. Osmosis can also be used to preserve food.

For example, fruits and vegetables can be preserved by soaking them in a solution of sugar and water. The sugar solution will draw water out of the cells of the fruit or vegetable, making it difficult for bacteria to grow.

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Answer:

The outer core is the only layer that is liquid. It is also mainly made from nickel and iron. The main job of the outer core is that it's responsible for the Earth's magnetic field. As the earth spins, the liquid inside this layer spins aswell, keeping it balanced.

Answer:

Explanation:

Cu(s) + 2Ag+  ======> Cu^(2+) + Ag(s)

Notice what happened. Silver started out as an ion. It took on 2 electrons that were donated by the copper.

The silver then became a solid ppte. This equation wil take on much more meaning when you take up oxidation and reduction. Until then, you need only know who gave up elections and who took them up.

Answer:

The area is important for climate science research because they can look at the glaciers and see over the years what is happening with them, are they multiplying or are they decreasing and if so at what rate.

Answer:

Melting glaciers are causing sea levels to rise. It’s important to study natural conditions in the Northern Patagonian Ice Field because the landscape there is dynamic and the effects of climate change can easily be seen. The retreat of the Nef Glacier and the disappearance of icebergs on the lake are evidence of rising temperatures and climate change.

Explanation:

The phrase that describes the plate boundary shown is D. is a region where earthquakes occur .

A transform boundary is the name given to this tectonic plate boundary. Two or more plates slip past one another in such a border. This shift is typically accompanied by some highly active earthquakes.

At a transform plate border, the grinding motion between the plates causes shallow earthquakes, significant lateral rock displacement, and a wide zone of crustal deformation. Essentially While no new crust is produced, subducted, or formed, and no volcanoes are formed, the fault produces earthquakes.

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According to the question,Average atomic mass of Mg = 24.3050.

Mass is the measure of the amount of matter in an object. It is related to the concept of weight, which is the measure of the gravitational force that acts on an object. Mass can be measured in a variety of ways, including weighing, using a beam balance, or by using an instrument such as a spring scale. Mass is usually measured in units of kilograms or grams. Mass is an important concept in physics and is one of the properties used to describe an object's motion.

24Mg (78.99%)

25Mg (10.00%)

26Mg (11.01%)

Average atomic mass of Mg = 24.3050

24Mg*(78.99%) + 25Mg*(10.00%) + 26Mg*(11.01%) = 24.3050

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Answer:

3785.411784 mL

Explanation:

Answer:

nitrate and sodium are spectator ions .The reactions that form an aqueous solution are often a spectator ions.

The pKa of acetic acid is 4.8, the result of adding 1 mL of 0.1 M HCl to a 0.1 M acetate buffer at a pH of 5.0 is:

C. The pH would drop significantly.

Acetic acid (CH₃COOH) is a weak acid that partially dissociates in water, releasing hydrogen ions (H⁺). In an acetate buffer solution, acetic acid and its conjugate base, acetate (CH₃COO⁻), are present in equilibrium:

CH₃COOH ⇌ H⁺ + CH₃COO⁻

The equilibrium is governed by the acid dissociation constant, represented as Ka. The pKa of acetic acid is given as 4.8. The pKa is the negative logarithm of the Ka value.

When a strong acid, such as HCl, is added to the acetate buffer solution, it introduces a large concentration of additional H⁺ ions. This disturbs the equilibrium between acetic acid and acetate, shifting it towards the formation of more undissociated acetic acid. Consequently, the concentration of H⁺ ions increases, causing a significant drop in pH.

Since the initial pH of the acetate buffer is 5.0, which is higher than the pKa of acetic acid (4.8), the buffer is in a partially deprotonated state. Adding HCl, a strong acid, disrupts the balance between the acid and its conjugate base, resulting in a more acidic solution and a significant decrease in pH.

Therefore, option C, "The pH would drop significantly," is the likely result of adding 1 mL of 0.1 M HCl to the 0.1 M acetate buffer at a pH of 5.0.

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Number of Silver atoms : N = 7.8 x 10²² atoms

Given

mass of bracelet : 13.94 g

Required

Number of atoms

Solution

Assuming the bracelet consists entirely of silver

mol of silver :

= mass : molar mass

= 13.94 g : 107,8682 g/mol

= 0.129

Number of atoms :

N = n x No(No = Avogadro's number)

N = 0.129 x 6.02 x 10²³

N = 7.8 x 10²² atoms

Le Chatelier's principle predicts that if NH3 is introduced to the reaction, the equilibrium will move towards products (P) to partially balance the addition of reactant.

Since the concentration of the product will decrease if NO is eliminated from the reaction, the equilibrium will likewise change in favour of the products (P). Water being a product, the addition of H2O would change the reaction's direction towards reactants (R).

The equilibrium would shift towards reactants (R) if O2 were taken out of the process to make up for its loss. As the temperature rises, the equilibrium will move in favour of the reactants (R), or endothermic reactions. Reduced pressure will cause the equilibrium to shift in favour of the side that contains more gas molecules, in this example, towards products.

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Answer:

A. The largest value is 7 and the smallest value is 1. Find the difference. 7 - 1 = 6.

Explanation:

Answer:

3.0 mol H₂O

Explanation:

Step 1: Write the balanced combustion equation

C₂H₆ + 3.5 O₂ ⇒ 2 CO₂ + 3 H₂O

Step 2: Establish the appropriate molar ratio

The molar ratio of C₂H₆ to H₂O is 1:3.

Step 3: Calculate the moles of H₂O formed from 1.0 mole of C₂H₆

1.0 mol C₂H₆ × 3 mol H₂O/1 mol C₂H₆ = 3.0 mol H₂O

In order to find the concenctration of this base we will use the titration formula, which is:

Ma * Va = Mb * Vb

Where:

Ma = concentration of acid

Va = volume of acid

Mb = concentration of base

Vb = volume of base

0.32 * 30.0 = Mb * 28.1

9.6 = 28.1Mb

Mb = 0.34

Therefore the concentration of Sodium hydroxide is 0.34M

Answer:

B. or .0236

Explanation:

Multiply the 3 sides to get 558.095, then divide the mass and volume to get .0236

The molecular mass of 3.6 moles of H₂SO₄.

So let us first calculate the molecular mass of 1 mole of H₂SO₄ and then when we calculate the molecular mass of 1 mole of H₂SO₄, we will calculate the molecular mass of 3.6 moles of H₂SO₄ by multiplying the molecular mass of 1 mole of H₂SO₄ by 3.6

Molecular mass of 1 mole of H₂SO₄ = 2*(molecular mass of Hydrogen) + (molecular mass of Sulphur ) + 4*(molecular mass of oxygen )

Molecular mass of 1 mole of H₂SO₄ = 2*1 + 32 + 4*16 = 98 grams

Mass of 3.6 moles H₂SO₄ = 3.6*98 =352.8 grams

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Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

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Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

Answer:

What is the chemical composition of iodized salt?

Iodized salt is a very cheap and good way of getting the necessary iodine. Ordinary table (cooking) salt is a chemical compound called "sodium chloride" (its chemical formula is NaCl). "Sodium iodide" (NaI) is added to the NaCl to make iodized salt.

Salt that has been iodized contains trace levels of sodium or potassium iodide. It's just regular salt sprinkled with potassium iodate. It has the same appearance and flavor! The bulk of table salt used currently is iodized, which has a number of advantages.

function of iodized salt
Iodized salt aids in the production of hormones that control heart rate and blood pressure. It also aids in the burning of unwanted fat deposits that may lead to heart disease. Salt maintains a healthy amount of hydration and electrolyte balance.

The correct answer is: Trial 1 (expA) and Trial 2 (expB).

The rate at which a chemical reaction occurs is known as the reaction rate. It is described as the shift in a reactant or product's concentration over time. The rate of a chemical reaction depends on several factors, including the concentration of reactants, temperature, pressure, and the presence of catalysts or inhibitors.

To study the impact of the initial concentration of Y on the reaction rate, we need to select two experiments with the same initial concentrations of reactants except for Y. This will allow us to compare the effect of changing the initial concentration of Y while keeping other factors constant.

Looking at the table, we can see that the initial concentrations of reactants in Trials 1 and 2 are the same, while the initial concentration of Y is different. Therefore, we can use these two trials as experiment A (expA) and experiment B (expB) to study the impact of the initial concentration of Y.

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Answer:

4.2 g good luck with the answer

Answer:2 ml.

Explanation:Volume. 2.5 g/ml = 5g/Volume. Volume = 5g/(2.5 g/ml). = 2 ml.

Answer:

2ml

Explanation:

The heaviest element that was created in the Big Bang is lithium (option c).

During the early stages of the universe, known as Big Bang nucleosynthesis, the conditions were hot and dense enough for the fusion of protons and neutrons to form light elements. While hydrogen and helium were the most abundant elements produced, a small amount of lithium-7 was also synthesized. However, the production of heavier elements through fusion processes required the later formation of stars and subsequent stellar nucleosynthesis.

Hence, the correct option is option c.

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Answer:

No mass loss

Explanation:

The mass of ice and the water in the different state are equal because the same of quantity of matter is present in both state of matter of matter.

Answer:

option 4 - it can have different compositions, and it has a set of characteristics that change.

Mixture is defined to have different compositions, and it has a set of characteristics that does change.There are 2 types of mixtures:1) homogenous mixtures 2)heterogenous mixtures

Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.

As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.

Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.

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