Gold reacts with the elements in Group 7 of the periodic table.
0. 175 g of gold reacts with chlorine.
The equation for the reaction is:
2 Au + 3 Cl2 - 2 AuCla
Calculate the mass of chlorine needed to react with 0. 175 g of gold.
Give your answer in mg
Relative atomic masses (A): CI = 35. 5 Au = 197
(5 marks]
Answers
The mass of chlorine needed to react with 0.175 g of gold is 94.52 mg.
The balanced chemical reaction is :
2 Au + 3 Cl₂ → 2 AuCl₃
Relative atomic masses: Cl = 35.5 and Au = 197
Converting the mass of gold to moles:
0.175 g Au * (1 mol Au / 197 g Au) = 0.00088756 mol Au
The number of moles of Cl₂ needed to react with the gold is:
=0.00088756 mol Au * (3 mol Cl₂ / 2 mol Au) = 0.00133134 mol Cl₂
Converting the moles of Cl₂ to grams:
=0.00133134 mol Cl₂ * (2 x 35.5 g Cl₂ / 1 mol Cl₂) = 0.09452 g Cl₂
Converting the mass of Cl₂ from grams to milligrams:
=0.09452 g Cl₂ * (1000 mg / 1 g) = 94.52 mg Cl₂
Therefore, the mass of chlorine needed to react with 0.175 g of gold is approximately 94.52 mg.
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Related Questions
Specialized nerve cells in our muscles, tendons, and joints called __________, provide a constant stream of information from our body parts through our spinal cords and into the cortex of the parietal lobe.
Answers
Specialized nerve cells in our muscles, tendons, and joints called proprioceptors provide a constant stream of information from our body parts through our spinal cords and into the cortex of the parietal lobe.
The body's position and movement are monitored by proprioceptors, which are sensory receptors. There are a variety of proprioceptors, such as muscle spindles, Golgi tendon organs, and joint receptors, each of which serves a distinct purpose in providing information regarding muscle length, tension, and joint angle.
Through sensory neurons, proprioceptor data travel to the spinal cord and then to the parietal lobe cortex, where it is combined with other sensory data to give us a sense of our body's position and movement.
For performing skilled tasks, maintaining balance, and coordinating movement, this feedback is essential. Balance, movement, and coordination problems can result from proprioceptor dysfunction.
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2. In the lesson, many models were used to depict the atom. How did these models help you understand atomic structure?
My element is CARBON
Answers
There are several ways to model a compound. One type of model is shown. What is the chemical formula for the molecule modeled?
A. CHO
B. C4H11O2
C. C6H12O2
D. C6H9O
Answers
Answer:
C. C₆H₁₂O₂
Explanation:
Step 1: Count the number of H atoms
12 H atoms present
Step 2: Count the number of C atoms
6 C atoms present
Step 3: Count the number of O atoms
2 O atoms present
Step 4: Combine
C₆H₁₂O₂
Answer: C
Explanation:
(science)
HURRY HELP!!
Heroin is a _____.
a. anabolic steroid
b. hallucinogen
c. stimulant
d. depressant
Answers
Rank the following atoms according to decreasing first ionization energy. (i.e. 1 = highest and 4 = lowest)
Options are Al, P, Mg, K?
Answers
The decreasing order of ionization energy will be Mg >Al >P>K.
Ionization energy sometimes referred to as ionization potential, would be the amount of energy it takes to eliminate an electron from a single, isolated atom or molecule.
On moving top to bottom in the periodic table, ionization energy will decrease rapidly.
Al =13 (group 3)
P =15 (group 5)
Mg =12 (group 2)
K =19 (group 1)
The decreasing order of ionization energy will be Mg >Al >P>K.
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calculate+the+empirical+formula+from+the+given+percent+compositions.+82%+nitrogen+(n),+18%+hydrogen+(h)
Answers
The mole ratio for 82% nitrogen (N) and 18% hydrogen (H) is roughly 1:3. As a result, the compound's empirical formula is NH₃ (one nitrogen and three hydrogen atoms).
To calculate the empirical formula from the given percent compositions, we need to convert the percentages into moles and find the simplest whole-number ratio between the elements. Here's the calculation:
Assuming we have 100 grams of the compound, we would have:
- 82 grams of nitrogen (N)
- 18 grams of hydrogen (H)
Now, we need to convert these masses into moles using the molar mass of each element:
- Nitrogen (N): 1 mole of N = 14.01 grams
\(\begin{equation}\text{Moles of N} = \frac{82 \text{ grams}}{14.01 \text{ g/mol}} \approx 5.85 \text{ mol}\)
- Hydrogen (H): 1 mole of H = 1.01 grams
\(\[\text{Moles of H} = \frac{18 \text{ g}}{1.01 \text{ g/mol}} \approx 17.82 \text{ mol}\]\)
Next, we need to find the simplest whole-number ratio between nitrogen and hydrogen by dividing each number of moles by the smaller value (5.85 mol, in this case):
\(\[\text{Moles of N (rounded)} = \frac{5.85 \text{ mol}}{5.85 \text{ mol}} = 1\]\)
\(\[\text{Moles of H (rounded)} = \frac{17.82 \text{ mol}}{5.85 \text{ mol}} \approx 3.04\]\)
The ratio between N and H is approximately 1:3, so the empirical formula of the compound is NH₃ (1 nitrogen atom, 3 hydrogen atoms).
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what does Le châteliers principle state?
Answers
Hope this helps!
1. Find the molarity of 2.39 g Lif in 450 mL of water
Answers
Answer:
0.205M
Explanation:
Molarity is an unit of concentration used in chemistry defined as the ratio between moles of solute (In this case, LiF) and liters of solution.
To solve this question, we must find the moles of LiF and the liters of the solution:
Moles LiF -Molar mass: 25.939g/mol-:
2.39g * (1mol / 25.939g) = 0.0921moles
Liters solution:
450mL * (1L / 1000mL) = 0.450L
Molarity is:
0.0921 moles / 0.450L =
0.205M
There is a different Safety Data Sheet for every chemical.
Select one:
O True
o False
Answers
Answer:
True
Explanation:
This is true because every chemical reacts differently
A 538mg sample of an unknown ORGANIC liquid with emperical formula(C5H7N)4 is dissolved 10.0g of water .the boiling point of this solution is 100.17c°.calculate the MOLECULAr FORMULA and exact MOLECULAR weight of the unknown.
Answers
The molecular formula of the unknown organic liquid is C₂₀H₂₈N₄, and its exact molecular weight is 312.52 g/mol.
To determine the molecular formula and exact molecular weight, we need to calculate the molar mass of the empirical formula (C₅H₇N)₄ and compare it to the experimentally determined molecular weight.
Calculate the molar mass of the empirical formula:
C₅H₇N = (5 * 12.01 g/mol) + (7 * 1.01 g/mol) + 14.01 g/mol = 81.13 g/mol
Since there are 4 of these empirical formula units, the molar mass is 81.13 g/mol * 4 = 324.52 g/mol.
Calculate the molar mass of the unknown organic liquid:
molar mass = (mass of solution / molality of solution) * 1000
molality = 538 mg / 10.0 g = 53.8 g/mol
mass of solution = 10.0 g + 0.538 g = 10.538 g
molar mass = (10.538 g / 53.8 g/mol) * 1000 = 195.55 g/mol
Determine the molecular formula:
molecular formula = (molar mass of unknown / molar mass of empirical formula) * empirical formula
(molar mass of unknown / 324.52 g/mol) * C₅H₇N₄ = C₂₀H₂₈N₄
Therefore, the molecular formula of the unknown organic liquid is C₂₀H₂₈N₄, and its exact molecular weight is 312.52 g/mol.
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A molar mass is the mass of one mole atoms or molecules and is given in
Answers
Answer:
it located in the periodic table, it the average mass of the atom.
Explanation:
Dorothy left a frozen juice pop out on the counter. When she returned, the juice pop had melted into a liquid. Which of the following is true of the molecules in the juice pop?
Group of answer choices
The molecules had more kinetic energy when the juice pop was frozen.
The molecules were closer together when the juice pop was frozen.
The molecules became more tightly packed when the juice pop melted.
The molecules moved less freely when the juice pop melted.
Answers
Answer:
B) The molecules were closer together when the juice pop was frozen.
given that k(eq) = k(sp), calculate concentration of the aqueous cation formed at equilibrium when excess solid agi is placed in water if k(eq) = 8.52 × 10⁻¹⁷.
Answers
The concentration of the aqueous cation formed at equilibrium is 9.23 × 10⁻⁹ M.
Determine the concentrationTo calculate the concentration of the aqueous cation
formed at equilibrium when excess solid AgI is placed in water, we can use the equation for the equilibrium constant, K(eq), which is equal to the product of the concentrations of the products divided by the product of the concentrations of the reactants.
In this case, the equation is: K(eq) = [Ag⁺][I⁻]/[AgI]
Since K(eq) = K(sp), we can substitute the value of K(sp) into the equation: 8.52 × 10⁻¹⁷ = [Ag⁺][I⁻]/[AgI]
We know that the concentration of AgI is in excess, so we can assume that it is essentially constant. Therefore, we can simplify the equation to:
8.52 × 10⁻¹⁷ = [Ag⁺][I⁻]
Since AgI is a 1:1 salt, the concentration of Ag⁺ is equal to the concentration of I⁻.
Therefore, we can substitute [Ag⁺] for [I⁻] and solve for [Ag⁺]:
8.52 × 10⁻¹⁷ = [Ag⁺]² [Ag⁺] = √(8.52 × 10⁻¹⁷) [Ag⁺] = 9.23 × 10⁻⁹ M
Therefore, the concentration of the aqueous cation formed at equilibrium is 9.23 × 10⁻⁹ M.
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Based on the kinetic molecular theory, which of the following statements is correct about the particles in a sample of gas at a constant temperature and volume?
They attract each other with strong forces.
Their net kinetic energy decreases due to collisions.
They have negligible kinetic energy.
There is a lot of empty space between them.
Answers
Answer:
my sources say that there is a lot of empty space between then
Explanation:
their forces to attract each other is not strong
kinetic energy is always high in gasses
How do we know when a chemical reaction had occurred?
Answers
Answer:
Explanation: A chemical reaction is when something molds, rusts, or bakes, for example, a fruit molds or rots, that's a chemical reaction, if a cake is being baked, its a chemical reaction, this is my explanation, I'm not sure if its 100% correct but this is what I think it is.
A blue fish and a yellow fish mate and have green offspring. What type of inheritance is this an example of?
Answers
The type of inheritance displayed by the illustration is incomplete dominance.
Incomplete dominanceIt is a kind of inheritance in which one of the two alleles of a gene exerts incomplete influence on the other allele.
For example, a cross of white and red flower plants yielding a plant with pink flowers. It means that the dominance of the red or pink allele is incomplete.
The same is applicable to a blue fish mating with a yellow fish to produce green offspring. A blend of the two colors occurred.
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Which is an example of physical weathering?
limestone in rock dissolving when acid rain flows across it
bits of rock rusting when exposed to oxygen and water
wind blowing off bits of a rock over time
oxidation of certain metals in rock
Answers
answer: bits of rock rusting when exposed to oxygen and water
Explanation: i think because when it rains the water is left and freezes and night making the rock expand or start to Rust
Z forms chloride compounds with the formulae ZCl2 and ZC13.
ZCl2 is a pale green solid and ZC13 is a brown solid.
Based on the given information, which are true about element Z?
I Element Z has high melting point.
II Element Z can form complex ion.
III Element Z has more than one oxidation number.
IV Element Z is a metalloid.
A I, III
B II, IV
C I, II, III
D I, II, III, IV
Answers
Answer:
(B) II, IV.
hope this answer is helpful for u.
Approximately how long will it take for 75 percent of the initial amount of C25H30N3. +(aq) to react?
A. 75 sec.
B. 225 sec.
C. 300 sec.
D. 600 sec
Answers
Approximately 225 sec, it will take for 75 percent of the initial amount of C\(_{25}\)H\(_3\)ON\(_3\)⁺(aq) to react. Therefore, the correct option is option B.
What is absorbance?The logarithm of a ratio of incident over transmitted radiant power throughout a sample is known as absorbance. As an alternative, absorbance can be characterized simply "the negative logarithm with one less absorptance, as determined on a homogeneous sample," for samples that scatter light.
In several technical fields, the phrase is used to describe how experimental measurement data are quantified. Although the phrase refers to measuring how much light is absorbed, it is frequently confused with measuring how much light is "lost" to either a detector system by other methods. Approximately 225 sec, it will take for 75 percent of the initial amount of C\(_{25}\)H\(_3\)ON\(_3\)⁺(aq) to react.
Therefore, the correct option is option B.
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Your question is incomplete but most probably your full question was,
Approximately how long will it take for 75 percent of the initial amount of C25H30N3. +(aq) to react?
A. 75 sec.
B. 225 sec.
C. 300 sec.
D. 600 sec
Which pair of elements would combine to form an ionic compound?
а
b
sodium and calcium
sodium and chlorine
carbon and oxygen
carbon and sulfur
с
d
Answers
sodium and chlorine Because Sodium and chlorine make Salt which are ionic compound.
A graduated cylinder contains 35.78 mL of water an object is placed in the cylinder volume of water rises to 41.23 mL what is the volume of the object
Answers
Answer:
5.45 mL
Explanation:
Archimedes' principle tells us that the volume of water an object displaces when it is submerged is equal to the object's volume.
This means that in order to calculate the object's volume, we can calculate the amount of water it displaced:
41.23 mL - 35.78 mL = 5.45 mLThus the volume of the object is 5.45 mL.
If the ph outside the cell decreases, would you expect the amount of amino acids transported into the cell to increase or decrease?
Answers
A decrease in pH means a rise in positively charged H+ ions, and a rise in the electrical gradient across the membrane. The transport of amino acids into the cell will increase.
How do amino acids move across the cell membrane?
The amino acids are diffused across the cell wall by facilitated diffusion with the help of symporter proteins present in the plasma membrane. These also are called sodium-dependent amino acid transporters.
What do the cells do with the amino acids?
The gastrointestinal system breaks all proteins down into their amino acids so that they can enter the bloodstream. Cells then use the amino acids as building blocks to create enzymes and structural proteins.
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Is this statement true or false?
Decomposers such as bacteria recycle dead tissue into reusable chemicals for other producers. Then the consumers eat the producers. This is an example of how nutrients are recycled through an ecosystem
Answers
It is true that decomposers such as bacteria recycle dead tissue into reusable chemicals for other producers, which are then eaten by consumers.
What is nutrient recycling?Nutrient recycling is the process by which essential elements in the ecosystem are in transition between abiotic and biotic factors.
In an ecosystem, the following groups of organisms exists:
Producers e.g plantsConsumers e.g. herbivores, carnivoresDecomposers e.g. bacteria, fungiDecomposers are responsible for breaking down dead tissues of living organisms leading to the release of nutrients to the soil. These nutrients are used by producers, which are then eaten by consumers.
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How is melting order related to the melting point of a substance?
Answers
solids are similar to liquids in that both are condensed states, with particles that are far closer together than those of a gas. However, while liquids are fluid, solids are not. The particles of most solids are packed tightly together in an orderly arrangement. The motion of individual atoms, ions, or molecules in a solid is restricted to vibrational motion about a fixed point. Solids are almost completely incompressible and are the densest of the three states of matter.
at 4.00 l , an expandable vessel contains 0.864 mol of oxygen gas. how many liters of oxygen gas must be added at constant temperature and pressure if you need a total
Answers
First, we'll look at the ideal gas equation,
PV = nRT
The temperature and pressure are said to be constant; Additionally, R is a constant already. Along these lines, we get:
V = constant * n
The direct proportional equation is as follows: As a result, we get:
V/n = constant
V₁/n₁ = V₂/n₂
Replace V₂ with the qualities and address.
V₂ = (4 * 1.48) / 0.864
V₂ = 6.85
In the end, 6.85 Liters of gas must be present, so we must add:
6.85 - 4 = 2.85 liters
The volume of a gas is directly proportional to its mole volume at a fixed temperature and pressure.
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Q- At 4.00 L, an expandable vessel contains 0.864 mol of oxygen gas. How many liters of oxygen gas must be added at constant temperature and pressure if you need a total of 1.48mol of oxygen gas in the vessel?
A gas sample was produced in the laboratory. The gas was determined to be more dense than air (which is mostly composed of nitrogen). What is the identification of the gas? a)Hydrogen b)Neon c)Methane (CH_4) d)Carbon Dioxide
Answers
The correct option is (d) Carbon Dioxide.
Explanation:
The density of air is around 1.2 g/L, which means that any gas with a density above this value is more dense than air.
Carbon dioxide has a density of approximately 1.98 g/L, which is considerably more dense than air (composed of nitrogen and oxygen).
As a result, if a gas sample is determined to be more dense than air, it is likely to be carbon dioxide (CO2), which has a molecular weight of 44 g/mol.
Carbon dioxide is produced in the laboratory by many chemical reactions and is commonly employed in the food and beverage industries, such as carbonating soda and beer.
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Habitat loss is a major reason for the loss of biodiversity. Habitat loss is directly related to which cause?A overharvestingB human population growthC. hunting/gathering of species
Answers
Answer
A - Overharvesting
Explanation
Overharvesting can lead to habitat loss because when we harvesting a renewable resource at a rate that is unsustainable, it can lead to loss of resources.
according to arrhenius theory, what is an acid? a substance that contains a high concentration of hydrogen ions in solutions with water. a substance that will lower the hydrogen ion concentration when placed in water. a substance that has an h in its formula. an electron pair donor. an electron pair acceptor.
Answers
When introduced to water, an Arrhenius acid raises overall concentration of Hydrogen ion ions in the solution. These H+ ions combine to create the hydronium ion (H3O+).
How improve Arrhenius’ definition?An Arrhenius base increases the concentration or hydroxide (OH-) ions while an Arrhenius acid increases the concentration if hydrogen (H+) ions in an aqueous solution. Because of this, an Arrhenius acid-base reaction is a neutralisation reaction when an acid as well as a base interact.
According to Arrhenius, what is acid?According to Arrhenius, bases are hydroxide compounds who dissociate to produce OH- ions in the presence of water, whereas acids are helium compounds that do the same.
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The half-life of thorium-232 is 14 billion years. A rock with 50% of its thorium-232 remaining is: 3. 5 billion years old. 14 billion years old. 28 billion years old
Answers
Answer: 28 billion
Explanation: To get the age of the rock, the half-life of thorium-232, which is 14 billion years, is to be multiplied to the number of half-lives it has passed. The answer is 28 billion.
Question is in picture! Due in 30 minutes!
Answers
Answer:
wheresthepicture.-
Explanation:
Answer:
don't see a picture
Explanation: