An element has three naturally occurring isotopes. Use the information below to calculate the weighted average atomic mass of the element, showing both the setup and the final answer for the calculation.
Isotope
Atomic Mass
Percent Abundance
I
39.96 u
99.59%
II
37.96 u
0.065%
III
35.97 u
0.336%
The molecular structure of water contains two atoms of hydrogen and one atom of oxygen. When water reaches its boiling point and turns into water vapor, what happens to its molecular structure?
A. It remains the same
B. It changes the ratio of atoms
C. It forms bigger molecules
D. It forms lighter molecules
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AgNO3(aq)+NaCl(aq)------>AgCl(s)+NaNO3(aq)
Name the chemical that are dissolved in water
In the reaction AgNO3(aq)+NaCl(aq)------>AgCl(s)+NaNO3(aq), the chemicals dissolved in water are AgNO3, NaCl, and NaNO3.
Explanation:In the chemical reaction AgNO3(aq)+NaCl(aq)------>AgCl(s)+NaNO3(aq), the chemicals that are dissolved in water, also known as aquatic solutions, are AgNO3 (Silver Nitrate) and NaCl (Sodium Chloride) on the reactant side, and NaNO3 (Sodium Nitrate) on the product side. These are shown with the (aq) notation which indicates they are aquatic, or dissolved in water.
The product AgCl (Silver Chloride), shown with the (s) notation, demonstrates that it precipitates, or forms a solid in the solution instead of dissolving in the water.
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Volume measurements will be made using a 25-ml graduated cylinder, which has major scale divisions marked every 2 ml and minor scale divisions every 0.2 ml. what is the estimated uncertainty in the volume measurements
Actually, the uncertainty point is when we have to estimate one place smaller than what the graduated cylinder can accurately read. So in this case, the smallest that we can accurately read is given by the minor marks of 0.2 mL. So if it is in between two minor marks we can only estimate the number, therefore the uncertainty is +/- 0.1ml.
Answer:
The estimated uncertainty is ±0.1 ml
Explanation:
Measurements are usually associated with uncertainty which depends on the instrument used or the procedure employed.
It is given that the graduated cylinder of volume 25 ml has a major scale marked every 2 ml and minor scale with 0.2 ml. In general measurements made with graduated cylinders can be estimated one decimal place beyond the smallest division. In this case, the volume of the liquid can be read to the nearest 0.1 division. Hence, the uncertainty would be ± 0.1 ml.
True or false? an element consists of only single atoms of that element.
What color did the bromothymol blue indicator turn when it was added to the test tube containing citric acid?
How many moles of aspartame are present in 5.00 mg of aspartame?
To find the number of moles in a given mass, convert the mass to grams (if necessary) and divide by the molar mass. Hence, in 5.00 mg of aspartame, there are approximately 1.70 x 10^-5 moles.
Explanation:To calculate the number of moles of aspartame in a given mass, we would use the molar mass of aspartame. First, we need to convert the mass from milligrams to grams because molar mass is usually given in g/mol. As 1 gram (g) is equal to 1000 milligrams (mg), 5.00 mg is equal to 0.005 g.
The molar mass of aspartame (C14H18N2O5) is approximately 294.31 g/mol. After converting the mass to grams, we use the formula: number of moles = mass (g) / molar mass (g/mol).
Therefore, the number of moles of aspartame in 5.00 mg is 0.005g / 294.31 g/mol = 1.70 x 10^-5 mol. So, there are roughly 1.70 x 10^-5 moles of aspartame in 5.00 mg.
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How do the crystallization and settling of the earliest formed minerals affect the composition of the remaining magma?
The process of early mineral formation involves their crystallization and settling, reducing their amount in the remaining magma. This changes the magma's composition, making it richer in lighter elements leading to the formation of different minerals.
Explanation:
The crystallization and settling of the earliest formed minerals is a process called fractional crystallization. This affects the composition of the remaining magma significantly. As the early forming minerals, usually heavier ones like olivine and pyroxene, crystallize, they often sink towards the bottom due to their higher density. This reduces the amount of these components in the remaining magma, essentially changing its composition. The leftover magma typically becomes gradually enriched in lighter elements, such as silicon, aluminum, potassium, and sodium, leading to the formation of different minerals such as feldspars and quartz.
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The crystallization and settling of early-formed minerals in magma lead to changes in the composition of the remaining melt, resulting in the formation of different igneous rock types.
The crystallization and settling of early-formed minerals within magma significantly influence the remaining melt's composition in a process known as fractional crystallization. As magma cools, minerals with higher melting points crystallize first, gradually removing them from the molten portion. These early crystallizing minerals, often denser than the remaining magma, tend to settle to the magma chamber's bottom.
This settling process results in the depletion of certain elements and compounds from the melt, making it more evolved or differentiated. The remaining magma continues to cool and may form late-crystallizing minerals with a composition reflecting this evolution. The end result is the formation of igneous rocks with distinct mineral compositions, influenced by the sequential crystallization and settling of minerals.
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How does an elements period number related to the number of the energy level of its valence electrons?
A student calculates the density of iron as 6.80 g/cm3 using lab data for mass and volume. a handbook reveals that the correct value is 7.86 g/cm3.what is the percent error?
The student's measurement is 13.486% less than the true value. The percent error is 13.486%.
Given information:
Measured value = 6.80 [tex]\rm \frac{g}{cm^3}[/tex]
True value = 7.86 [tex]\rm \frac{g}{cm^3}[/tex]
Percent error is a measurement of the discrepancy between an experimental or estimated value and a true or accepted value.
The percent error is calculated using the following formula:
[tex]\rm Percent \ error = |\frac{(measured \ value - true\ value)}{true \ value}| \times 100[/tex]
In this case, the measured value is 6.80 g/cm3 and the true value is 7.86 g/cm3. So, the percent error is:
[tex]\rm Percent \ error = |\frac{(6.80 - 7.86)}{7.86}| \times 100%[/tex]
Percent error = -13.486005089058532 %
The negative sign indicates that the measured value is less than the true value. So, the percent error is 13.486%. The student's measurement is 13.486% less than the true value.
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Final answer:
The percent error in the calculated density of iron compared to the actual value is approximately 13.49%. The correct density of iron is 7.86 g/cm³, which can be converted to 7860 kg/m³ for different unit requirements.
Explanation:
The student is asking how to calculate the percent error in the measured density of iron. The percent error can be found using the formula: percent error = |(experimental value - actual value) / actual value| × 100%.
In this case, the experimental value of density is 6.80 g/cm³ and the actual value from the handbook is 7.86 g/cm³. Plugging these values into the formula gives us: percent error = |(6.80 - 7.86) / 7.86| × 100% ≈ 13.49% (rounded to two decimal places).
To convert the correct density of iron from g/cm³ to kg/m³, multiply the density in g/cm³ by 1000 to convert grams to kilograms and by (100)^3 to convert cm³ to m³, resulting in 7.86 g/cm³ × 1000 kg/g × (100)^3 cm³/m³ = 7860 kg/m³.
What is the volume of a solution that has a specific gravity of 1.2 and a mass of 185 g?
Which of the following will hold its shape?
A. gas
B. solid
C. liquid
D. plasma
Answer:
Solid
Explanation:
A solid will retain its shape; the particles are not free to move around.
What volume of 0.200 m h3po4 will completely react with 50.00 ml of 0.200 m naoh?
These reactions can also be reversed, breaking the large molecules into its individual molecules. what substance would need to be added in order to reverse the reaction
What is the volume of 12.8 g of a liquid that has a density of 0.789 g/mL?
Answer: The volume of liquid is 16.22 mL.
Explanation:
Density is defined as the ratio of mass of the object and volume of the object.
Mathematically,
[tex]\text{Density}=\frac{\text{Mass of the object}}{\text{Volume of the object}}[/tex]
We are given:
Density of liquid = [tex]0.789g/mL[/tex]
Mass of liquid = 12.8 g
Putting values in above equation, we get:
[tex]0.789g/mL=\frac{12.8g}{\text{Volume of liquid}}\\\\\text{Volume of liquid}=16.22mL[/tex]
Hence, the volume of liquid is 16.22 mL.
According to the Gas Laws, you would changed temperature to change __________.
A. volume and pressure
B. mass and volume
C. weight and volume
D. gravity and volume
Jason noticed that his flashlight stopped working. He solved the problem by using the scientific method. Arrange the steps he followed in the correct order in the flowchart.
1.He suspects that the batteries could be dead.
2.He notices that his flashlight stopped working.
3.He replaces the batteries in the flashlight with new batteries.
4.His flashlight works again.He writes a note to himself to buy extra batteries.
Answer:the answer is 2. he noticed that his flashlight stopped working
1. he suspected that the batteries could be dead
3. he replaces the batteries in the flashlight with new batteries
4.his flashlight works again. he writes a note to himself to buy extra batteries
Explanation:
The correct order of steps followed by Jason with respect to the scientific method would be 2, 1, 3, and 4.
The scientific method is a rational order to steps through which phenomena are understood. The steps are;
observationformation of hypothesistesting of the hypothesis by experimentsconclusionThus, in the case of Jason:
He notices that his flashlight stopped working - observationHe suspects that the batteries could be dead - hypothesisHe replaces the batteries in the flashlight with new batteries - experimentationHis flashlight works again. He writes a note to himself to buy extra batteries - conclusionMore on the scientific method can be found here: https://brainly.com/question/7508826?referrer=searchResults
The reaction of 1.250 g k with o2 forms 2.273 g of an oxide of potassium that is used in self-contained breathing devices. determine the formula for this oxide of potassium.
1 kg is equal to...
Options:
1) 103 hg.
2) 103 g.
3) 10-2 cg.
4) 10-2 g.
Is helium a homogeneous or heterogeneous mixture or compound or element?
Is the tendency of copper to turn green when exposed to air chemical or physical property?
The green color copper turns when exposed to air is due to a chemical change. This happens because of a reaction between copper and the oxygen in the air, resulting in copper(II) oxide, or patina. The resulting green layer passivates, or protects, the copper from further corrosion.
Explanation:
The tendency of copper to turn green when exposed to air is a chemical change. This color change happens due to a chemical reaction between copper and the oxygen in the air, resulting in the formation of a new compound known as copper(II) oxide, which has a characteristic blue-green color, often referred to as patina. This green layer forms a protective barrier, preventing further corrosion of the underlying copper in a process known as passivation.
For instance, the iconic Statue of Liberty has a characteristic green color because it is made of copper, and the copper has reacted with the elements to form a patina or green covering. This is not merely a physical change, but a chemical reaction between copper and the elements in its surroundings.
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Large molecules that contain carbon and are held together by covalent bonds are called
If the density of iron is 7.8 gram and you find an iron nail weighing 15 grams what would volume of the nail be
Calculate the specific heat of a substance when 63j of energy are transferred as heat to an 8.0 g sample to raise it temperature from 314 k to 340 k
The formula for energy or enthalpy is:
E = m Cp (T2 – T1)
where E is energy = 63 J, m is mass = 8 g, Cp is the specific heat, T is temperature
63 J = 8 g * Cp * (340 K – 314 K)
Cp = 0.3 J / g K
Answer : The specific heat of substance is 0.30 J/g.K
Explanation :
Formula used :
[tex]Q=m\times c\times \Delta T[/tex]
or,
[tex]Q=m\times c\times (T_2-T_1)[/tex]
where,
Q = heat = 63 J
m = mass of substance = 8.0 g
[tex]C_w[/tex] = specific heat of substance = ?
[tex]T_1[/tex] = initial temperature = 314 K
[tex]T_2[/tex] = final temperature = 340 K
Now put all the given value in the above formula, we get:
[tex]63J=8.0g\times c\times (340-314)K[/tex]
[tex]c=0.30J/g.K[/tex]
Therefore, the specific heat of substance is 0.30 J/g.K
Classify each of these soluble solutes as a strong electrolyte, a weak electrolyte, or a nonelectrolyte. solutes formula nitric acid hno3 lithium hydroxide lioh hydrofluoric acid hf ammonia nh3 potassium chloride kcl ethanol c2h5oh glucose c6h12o6
Final answer:
Nitric acid and lithium hydroxide are classified as strong electrolytes, meaning they fully dissociate into ions in solution. Hydrofluoric acid and ammonia are weak electrolytes, partially dissociating into ions. Ethanol and glucose are nonelectrolytes, dissolving without forming ions.
Explanation:
When classifying solutes as strong electrolytes, weak electrolytes, or nonelectrolytes, we examine how they dissociate in water. A strong electrolyte dissociates completely into ions, a weak electrolyte only partially dissociates, and a nonelectrolyte does not dissociate at all in solution.
Nitric acid (HNO3) is a strong electrolyte because it dissociates completely into H+ and NO3- ions in aqueous solution.Lithium hydroxide (LiOH) is also a strong electrolyte, as it dissociates into Li+ and OH- ions when dissolved in water.Hydrofluoric acid (HF) is a weak electrolyte because it only partially dissociates into H+ and F- ions.Ammonia (NH3), when dissolved in water, forms ammonium (NH4+) and hydroxide (OH-) ions, but because the reaction is reversible and the degree of dissociation is not complete, it is also considered a weak electrolyte.Potassium chloride (KCl) is a strong electrolyte that fully dissociates into K+ and Cl- ions.Ethanol (C2H5OH) and glucose (C6H12O6) are both nonelectrolytes; they dissolve as molecules without forming ions in aqueous solution.What is the volume (in cubic inches) of 3.6 lb of titanium? The density of titanium is 4.51 g/cm3
To calculate the volume of titanium given its mass, you must first convert the mass from pounds to grams. Apply the formula volume=mass/density and then convert the volume from cubic centimeters to cubic inches. The volume of 3.6 lb of titanium rounded off to the nearest hundredth is 22.07 cubic inches.
Explanation:To calculate the volume of a substance, you need to use the formula:
volume = mass / density
Given the mass of titanium is 3.6 lb and the density is 4.51 g/cm³, you first need to convert the mass from pounds to grams (since the density is given in g/cm³). This can be done using the conversion factor: 1 lb = 453.59 g.
So, 3.6 lb = 3.6 x 453.59 g = 1632.924 g.
Then, apply the volume formula:
Volume = 1632.924 g / 4.51 g/cm³ = 361.847 cm³
Finally, convert the volume in cm³ to in³, using the conversion factor: 1 cm³ = 0.0610 in³.
So, the volume in in³ is: 361.847 cm³ = 361.847 x 0.0610 in³ = 22.0727 in³
Hence, the volume of 3.6 lb of titanium is approximately 22.07 cubic inches.
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Which elements make up 96.3% of living things?
Which subatomic particle is the identity of the atom and why?
What is minimum volume of oxygen required to react with 42.5 g of aluminum in the synthesis of aluminum oxide at stp?
Which of these ions have six d electrons in the outermost d subs hell
Ions with six d electrons in the outermost d subshell can be found in transition metal elements such as Cr³+(d³), Co²+(d²), Ni²+(d³), Cu²+(d³), and Zn²+(d¹⁰)
Explanation:The ions with six d electrons in the outermost d subshell are typically found in the transition metal elements.
For example, the ion with six d electrons in the outermost subshell is Cr³+(d³).
Other ions with six d electrons in the outermost subshell include Co²+(d²), Ni²+(d³), Cu²+(d³), and Zn²+(d¹⁰).
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