A sample of NH3(g) is placed in a rigid container. When the equilibrium below is established, the partial pressure of hydrogen gas is 0.978 atm. What is the partial pressure of N2(g) at equilibrium?

Answer:VO(ClO4)3 i'm sure this is it

Explanation:

The first image shows cleavage, same as the second. The third image shows fracture

1. Image 1:

2. Image 2

Image 3:

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Answer: H2O and OH^-  are added to balance the oxygen atoms.

Explanation:

Answer:

D

Explanation:

it's D because it goes waxing crescent to waxing gibbous

Answer:

9.8 h

Explanation:

From the question,

Os²⁻ - 2e⁻ = Os

From the equation above,

2 F of electron is needed to liberate 1 mole of osmium.

45 g of osmium contains 45/190 mole of osmium = 0.237 mole.

2 F ⇒ 1 mole.

2(0.237) F ⇒ 0.237 mole

0.474 F. will produce 45 g of osmium.

If         1 F = 96500 C ,

Then,  0.474 F = 45741 C,

But,

Q = it

t = Q/i....................... Equation 1

Given: Q = 45741 C, i = 1.30 A

Substitute into equation 1

t = 45741/1.3

t = 9.8 h.

For Test One, phenotype ratio is Short fur : Long fur = 2 : 0; For Test Two, the phenotype ratio is Short fur : Long fur = 3 : 1; For Test Three, the phenotype ratios will be Short fur : Long fur = 0 : 2

For Test One:

Parent 1: FF (homozygous dominant for short fur)

Parent 2: Ff (heterozygous for short fur)

The Punnett square for this cross will give the following genotype ratios:

FF : Ff = 1 : 1

And the corresponding phenotype ratios will be:

Short fur : Long fur = 2 : 0 or 100% short fur

For Test Two:

Parent 1: Ff (heterozygous for short fur)

Parent 2: Ff (heterozygous for short fur)

The Punnett square for this cross will give the following genotype ratios:

FF : Ff : ff = 1 : 2 : 1

And the corresponding phenotype ratios will be:

Short fur : Long fur = 3 : 1 or 75% short fur and 25% long fur

For Test Three:

Parent 1: ff (homozygous recessive for long fur)

Parent 2: ff (homozygous recessive for long fur)

The Punnett square for this cross will give the following genotype ratios:

ff : ff = 1 : 0

And the corresponding phenotype ratios will be:

Short fur : Long fur = 0 : 2 or 100% long fur

For this investigation, the test variable is the breed of hamster and the outcome variable is the phenotype of the hamster.

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Answer:

The speed of molecules in a gas is directly proportional to the square root of the temperature and inversely proportional to the square root of the molar mass.

Since both gases are at the same temperature, we only need to compare their molar masses.

The molar mass of carbon dioxide (CO2) is 44 g/mol and the molar mass of hydrogen (H2) is 2 g/mol.

Therefore, the square root of the molar mass of hydrogen is smaller than the square root of the molar mass of carbon dioxide.

This means that the speed of hydrogen molecules is greater than the speed of carbon dioxide molecules at the same temperature.

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer: D.................................................................................................................

Explanation:

Reasoning includes one or more scientific principles in this context.

This involves the thought about something in a sensible and logical manner due to one or more scientific principles being applied.

It is very important to the claim and evidence as it helps ascertain their validity in science.

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Explanation:

Zinc is the anode (solid zinc is oxidised). Silver is the cathode (silver ions are reduced).

By convention in standard cell notation, the anode is written on the left and the cathode is written on the right. So, in this cell: Zinc is the anode (solid zinc is oxidised). Silver is the cathode (silver ions are reduced).

Answer:

True

Explanation:

element are made up of two different of substances

Answer:

true

and element is made out of atoms matter is made of atoms make everything around what we see or what takes up space

Answer:

1. Because the rules will keep you safe it prevents you from getting hurt.

2.i) don't taste chemical

ii) Always wear protective gears

iii) be careful with tool

iv) wear protective gloves

Explanation:

help everyone get out quickly

My classmate's statement in incorrect because plants are also composed of cells.

All living things are composed of cells. A cell is the smallest unit of living organisms. Cells obtain energy via the process of cellular respiration. During cellular respiration, glucose is broken down to yield carbon dioxide and water.

In photosynthesis, carbon dioxide and water are combined to form glucose. The two processes are opposites of each other. Plants produce their own food via photosynthesis. Since plants are composed of cells, plant cells also undergo cellular respiration therefore my classmate's statement in incorrect.

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Answer:

A (Protons)

Explanation:

For example, if the number is 1, then it has 1 proton. The proton always changes but the rest never do.

Answer:

will be 9.7 Liters

Explanation:

The molarity of a solution that contains 35.00 g of CuSO4 dissolved in 250.0 mL of water is 0.88M.

The molarity of a solution can be calculated using the following formula:

Molarity = no of moles/volume

According to this question, a solution consists of 35.00 g of CuSO4 dissolved in 250.0 mL of water.

no.of moles of CuSO4 = 35g ÷ 159.6g/mol

no. of moles of CuSO4 = 0.22 moles

Therefore; molarity of CuSO4 solution is calculated as follows:

M = 0.22 ÷ 0.25

M = 0.88M

Therefore, the molarity of a solution that contains 35.00 g of CuSO4 dissolved in 250.0 mL of water is 0.88M.

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Divergent, convergent, and transform plate boundaries are the three different types of plate tectonic boundaries.

Divergent (Spreading):

Convergent (Colliding):

Transformation:

The point where two tectonic plates collide is known as a transformation or lateral fault. One of the best instances of transverse plate motion is the San Andreas Fault.

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The correct question is-

What are the different types of plate tectonic boundaries?

The mass of the methane is 54.4 g.

Mass and moles are related through the concept of molar mass. The molar mass of a substance is the mass of one mole of the substance, which is numerically equal to its atomic or molecular weight.

The relationship between mass and moles can be expressed using the following equation:

number of moles (n) = mass (m) / molar mass (M)

We know that;

1 mole of the methane would contain 6.02 * 10^23 molecules

x moles would contain  2.04 x 10^ 24 molecules

x = 3.4 moles

Then we have the mass as;

= 3.4 moles * 16 g/mol

= 54.4 g

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Answer:

when placed in water, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms. chemical change = fire is a sign of chemical reaction.

Explanation:

When placed in water the sodium pellets catch the fire and liberate the hydrogen gas. On mixing with water solid sodium forms a colorless basic solution.

Sodium is a soft metal. It is a very reactive element with a low melting point. Sodium reacts very quickly with water, snow, and ice to produce sodium hydroxide and hydrogen. It is an alkali metal and the sixth most abundant metal on earth. It has a silvery white color.

It has a strong metallic luster. On reacting with oxygen it produces sodium oxide which on reacting with the water produces sodium hydroxide.

It is used to improve the structure of certain alloys and soaps. It is also used in the purification of metals. Sodium is also present in sodium chloride, an important compound found in the environment.

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Answer:

think I did this before and its V

The variances of the gravimetric and volumetric approaches are not significantly different because the calculated F-value (0.233) is smaller than the crucial F-value (4.76).

We can use the F-test to see if the variance of the gravimetric approach differs noticeably from that of the volumetric method. The F-test assesses whether there is a significant difference between two data sets by comparing the ratio of their variances.

Let's first compute the variances for the two approaches. We have four replicate measurements for the gravimetric technique: 13.0, 13.5, 13.3, and 12.9. We compute the average of the squared deviations from the mean to determine the variance:

Gravimetric variance is calculated as follows: [(13.0 - 13.2)2 + (13.5 - 13.2)2 + (13.3 - 13.2)2 + (12.9 - 13.2)2] / 4 = 0.1175

We have the volumetric approach, which

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Considering the ideal gas law, the volume occupied by 3.25 moles of an ideal gas at a temperature of 18.00°C is 686.71 L.

An ideal gas is the behavior of those gases whose molecules do not interact with each other and move randomly. Under normal conditions and under standard conditions, most gases exhibit ideal gas behavior.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T), related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the ideal gas law:

1.13 atm×V = 3.25 mol× 0.8205 L.atm/K.mol× 291 K

Solving:

V = (3.25 mol× 0.8205 L.atm/K.mol× 291 K)÷ 1.13 atm

V= 686.71 L

Finally, the volume is 686.71 L.

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The combining capacity of an atom of the element by either sharing, gaining or loosing electrons is known as valency.

_______

RainbowSalt2222 ☔

Answer:Electrical Conductivity,soluble

Explanation:

Salt is a non-magnetic solid and is soluble in water. Sand is a non-magnetic solid and is insoluble in water.

Electrical Conductivity: Salt is an electrolyte and conducts electricity when dissolved in water or in a molten state. This is because salt dissociates into ions (Na+ and Cl-) that can carry electric current. In contrast, sand is a covalent compound and does not conduct electricity, as it does not dissociate into ions in the same way as salt. Sand is considered an insulator in terms of electrical conductivity.

These are problems related to mixing different solutions to obtain a desired concentration.

Problem 1: 200 g of 17% solution, mix 100 g of 15% solution with 100 g of 20% solution.

Problem 2: 54 g of 18% solution and 246 g of 5% solution are needed.

Problem 3: The mass percentage of the final solution is (20015 + 35020) / (200 + 350) = 18.33%

Problem 4: The mass percentage of the final solution is (30015 + 35) / (300 + 35) = 13.23%

Problem 5: The mass percentage of the final solution is (40025) / (400 + 150) = 21.74%

Mass is a fundamental physical property of matter and is defined as the amount of matter that an object contains. It is usually measured in units of grams (g) or kilograms (kg). Mass is related to but different from weight, which is the force exerted on an object by gravity. In chemistry, mass is often used to express the amount of a substance in a sample or reaction.

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Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.