A pure substance contains its own contents only. The pure substance among the given options is pumpkin pie because it contains no other contents.
What is a pure substance?
A pure substance contains only its own contains and not any other things are added to it. Water Itself is pure despite the quality of water. But when we add salt or sugar to it it cannot be classified as a pure substance.
Salt is a naturally made chemical compound but it might contains some impurities and the traces other minerals in it since it is collected from the sea.
Iced tea is not classified as pure because, it contains ice, tea powder, sugar and water. Thus, it is a mixture of different substances. Pumpkin pie is naturally made fruit contains its pulp and seed only not any added things are there.
Hence, pumpkin pie can be classified as a pure substance and option C is correct.
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Balance this chemical equation with an explanation please: CH3CH2OH + O2 = CO2 + H2O
Final answer:
To balance the equation CH3CH2OH + O2 = CO2 + H2O, one balances the carbon, hydrogen, and then the oxygen atoms in sequence, which yields the final balanced chemical equation of 2CH3CH2OH + 7O2 = 4CO2 + 6H2O.
Explanation:
To balance the chemical equation CH3CH2OH + O2 = CO2 + H2O, we need to ensure there are equal numbers of each type of atom on both sides of the equation. This process is known as stoichiometry.
Step 1: Balance the carbon atoms.
We have 2 carbon atoms in the ethanol (CH3CH2OH) molecule, so we need 2 CO2 molecules to balance the carbons: CH3CH2OH + O2 = 2CO2 + H2O.
Step 2: Balance the hydrogen atoms.
With 6 hydrogen atoms in ethanol, we need 3 H2O molecules to balance: CH3CH2OH + O2 = 2CO2 + 3H2O.
Step 3: Balance the oxygen atoms.
Now we have 4 oxygen atoms in the CO2 and 3 in the H2O, for a total of 7 oxygen atoms needed on the reactant side. We can get this by multiplying O2 by 7/2: CH3CH2OH + ½ 7O2 = 2CO2 + 3H2O.
Step 4: Balance the entire equation by getting rid of the fraction. Multiply all coefficients by 2 to get whole numbers: 2CH3CH2OH + 7O2 = 4CO2 + 6H2O.
The final balanced equation is 2CH3CH2OH + 7O2 = 4CO2 + 6H2O.
This is stoichiometry. The equation is balanced not only at the molecular level but also in terms of molar amounts of reactants and products.
WITCH IS MADE BY WEATHERING ASH SEDEMENTS MAGMA OR MINERALS
Consult an aufbau diagram which shell would be complete with 10 electrons
f is the answer. Have an amazing day
The volume of a gas sample is 405 mL at 10.0 atm and 467 K. What volume, in mL, will it occupy at 4.29 atm and the same temperature?
The final volume of the gas at the given pressure and temperature is 944.1 mL.
The given parameters;
initial volume of the gas, V₁ = 405 mLinitial pressure of the gas, P₁ = 10 atmfinal pressure of the gas, P₂ = 4.29 atmThe final volume of the gas at the given pressure and temperature is calculated by applying Boyle's law;
[tex]P_1V_1 = P_2v_2\\\\V_2 = \frac{P_1V_1}{P_2} \\\\V_2 = \frac{10 \times 405 }{4.29} \\\\V_2 = 944.1 \ mL[/tex]
Thus, the final volume of the gas at the given pressure and temperature is 944.1 mL.
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Final answer:
Using Boyle's Law, which relates to the pressure and volume of a gas under constant temperature, the gas originally at 405 mL and 10.0 atm, when subjected to 4.29 atm at the same temperature, will occupy a volume of approximately 945 mL.
Explanation:
The volume of a gas sample can be calculated under different conditions of pressure while keeping the temperature constant using Boyle's Law. Boyle's Law states that the volume of a given mass of gas is inversely proportional to its pressure when temperature remains constant, which can be expressed as P1V1 = P2V2, where P is the pressure and V is the volume of the gas at two different states (1 and 2).
In this scenario, the initial conditions are 405 mL volume at 10.0 atm, and we aim to find the volume at 4.29 atm at the same temperature. Using Boyle's Law:
10.0 atm * 405 mL = 4.29 atm * V2
Solving for V2, we find that V2 = (10.0 atm * 405 mL) / 4.29 atm, which equals approximately 945 mL.
Therefore, the gas will occupy a volume of 945 mL at 4.29 atm and the same temperature of 467 K.
A cube of ice melts in a beaker to form 10 g of water. What is the best estimate of the mass of the ice cube?
2 g
5 g
10 g
15 g
Sal and Marie were experimenting with bar magnets in science class, picking up chains of paper clips. Where should they expect the magnetic force of the bar magnet to be the strongest and pick up the most paper clips?
A) at both Poles
B) at the South Pole
C) at the North Pole
D) in the center of the bar magnet
Answer: Option (A) is the correct answer.
Explanation:
A bar which is magnetic in nature actually has magnetic poles at its end. One end is south pole and the other one is north pole.
And it is known that opposite poles attract each other. Therefore, when north pole comes near south pole then due to force of attraction these poles are attracted towards each other.
Thus, we can conclude that at both poles they should expect the magnetic force of the bar magnet to be the strongest and pick up the most paper clips.
If chocolate is given to teachers, then amount of homework will decrease
The statement suggests a hypothetical correlation between giving teachers chocolate and a decrease in assigned homework. This could be tested experimentally, but it's important to remember other influences may effect the outcome.
Explanation:The sentence 'If chocolate is given to teachers, then the amount of homework will decrease' is a hypothetical or conditional statement as it proposes a cause and effect relationship: the cause being 'chocolate is given to teachers' and the effect is 'the amount of homework will decrease'. This type of connection is common in hypothesis testing, where an idea is proposed and then evaluated through experimental or observational means.
For example, a study might be carried out in a school where half of the teachers are given chocolate and the other half are not. The amount of homework assigned by both groups could then compared to see if there is any noticeable difference. However, it is crucial to recognize that other factors outside of the experiment, such as the individual teaching style, the curriculum demands, and teacher's preference, could also impact the outcome.
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which 0f the following describes the electron sharing between hydrogine and flourine
In what ways are sulfate and sulfide minerals the same? In what ways are they different?
Sulfate and sulfide minerals are both inorganic and share similar crystal structures. Sulfates contain SO4^2- while sulfides contain S^2-. They differ in solubility, formation conditions, and typically found in different environments.
Explanation:Sulfate and sulfide minerals are both types of minerals that contain sulfur. They are the same in that they are both inorganic solids with a definite chemical composition and crystalline structure, which means they have an orderly arrangement of atoms. The key differences between the two are based on their chemistry. Sulfate minerals contain the sulfate anion (SO42-), whereas sulfide minerals contain the sulfide anion (S2-). Sulfates typically form in oxidizing conditions and tend to be more soluble in water compared to sulfides, which are usually formed in reducing conditions and are generally less soluble in water. These characteristics influence the physical properties and formation environments of these minerals. For example, sulfate minerals, such as gypsum (CaSO4·2H2O), often occur in evaporative environments, while sulfide minerals, such as pyrite (FeS2), commonly form in reducing environments such as sedimentary layers with organic material or hydrothermal veins.
Which statement applies to the horizontal rows or periods in the periodic table? A. The properties are all the same. B. The elements have the same number of electrons. C. The properties change going across each row. D. The elements in each row combine easily.
the atomic mass of chlorine is 35.45 u. is it possible for any single atom of chlorine to have a mass number of exactly 35.45? explain
Final answer:
The atomic mass of chlorine (35.45 amu) is an average value calculated from the mass numbers of the naturally occurring isotopes chlorine-35 and chlorine-37, and individual atoms of chlorine can only be one of these isotopes with whole number mass numbers.
Explanation:
The atomic mass of chlorine is 35.45 amu, but it is not possible for any single atom of chlorine to have a mass number of exactly 35.45. This value represents the average atomic mass, which is calculated by averaging the masses of chlorine's naturally occurring isotopes, mainly chlorine-35 and chlorine-37, in proportion to their abundance.
Individual chlorine atoms can either be the isotope chlorine-35 (with an atomic mass of approximately 35 amu) or chlorine-37 (with an atomic mass of approximately 37 amu). The atomic mass number of an isotope must be a whole number since it represents the total number of protons and neutrons in the nucleus, which are discrete entities.
water can be deflected by a strong electrical charge because of what property?
true or false
making modles involved creating representation of complex objects or processes to help people study and understacannot be observed directlynd things that
true or false
You can prevent foodborne illness by
Foodborne illness can be prevented by practicing good hygiene, safe food handling, and proper cooking techniques. This involves washing hands, cleaning cooking surfaces, storing food at correct temperatures, avoiding cross-contamination, and ensuring food is cooked thoroughly.
Explanation:You can prevent foodborne illness by practicing good hygiene, safe food handling, and proper cooking techniques. Firstly, always wash your hands and clean your cooking surfaces before preparing food. Secondly, be sure to store food at proper temperatures. Perishable foods should be refrigerated and cooked foods should not be left out for too long. In addition, avoid cross-contaminating raw and cooked foods, so always use separate cutting boards and utensils. Lastly, make sure that your food is cooked thoroughly. Using a food thermometer to check meat and poultry can ensure that they are cooked to a safe temperature.
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In a scientific experiment, the factor that may change in response to the manipulated variable is called the ______ variable.
if one person can clean a house in 5 hours and the second person can clean the same house in 4 hours, how long would will it take to clean the house if they worked together?
If an object’s mechanical energy is equal to its potential energy how much kinetic energy does the object have how do you know
Final answer:
If an object's mechanical energy is equal to its potential energy, the kinetic energy of that object is 0 joules because the total mechanical energy is the sum of kinetic and potential energy which must remain constant in the absence of non-conservative forces.
Explanation:
If an object's mechanical energy is equal to its potential energy (PE), this means that the object has no kinetic energy (KE) at that moment. We deduce this from the principle that the mechanical energy of a system is conserved in the absence of non-conservative forces, such as friction or air resistance. Therefore, if mechanical energy equals potential energy, then the equation KE + PE = constant simplifies to 0 + PE = constant, which indicates that KE must be 0 joules because all the mechanical energy is stored as potential energy.
The stone that is mane when minerals harden in the mold of a living thing
The stone you're referring to is called "petrified wood."
Petrified wood forms when minerals, typically silica, replace the organic material in the wood over thousands or millions of years. This process, known as petrification, occurs when wood is buried underground in sedimentary layers where oxygen is limited, preventing decomposition. As groundwater rich in dissolved minerals seeps through the wood, it gradually replaces the organic components with minerals, preserving the original structure of the wood. The result is a fossilized form of wood that retains the texture, grain patterns, and sometimes even the cellular structure of the original tree. Petrified wood is prized for its beauty and is often used in jewelry, decorative items, and as a geological curiosity.
Completed version:
The stone that is mane when minerals harden in the mold of a living thing.
672.5 is 60.4% of what number?
Which statement is true about Air at different temperatures
Answer:
Several properties (listed in the explanation)
Explanation:
The volume and density of air change with changes in temperature, T.
There are several things that take place:
As the temperature of air increases:
1. the volume increases - The gas particles have more kinetic energy to move hence the increase in volume. The kinetic energy is directly related to temperature as the energy is derived from the energies of the particles
2. the density decreases- there is less mass of air per unit volume. The air particles are not closely bound together
As the temperature of air decreases:
1. The volume decreases - the air particles lose kinetic energy and are close together.
2. the density increases - there is more weight per unit volume due to lower kinetic energy.
ch3c(ch2ch3)2(ch2)5ch3 naming
What is the chemical formula of sulfur dioxide? A. SO B. SO2 C. SO3 D. S2O
Answer:
B: SO2
Explanation:
how many moles in Co are there in 6 billion Co atoms
What is a tool used to measure Force
Consider the elements in this family (group) of the periodic table. Because they are in the same family, what can you predict about these elements? A) They are all about the same mass. B) They are chemically reactive in a similar way. C) The size of the atom decreases as you go down the column. D) The elements change from metals to nonmetals as go down the column.
Answer: Option (B) is the correct answer.
Explanation:
Elements of same group tend to show similar chemical properties because elements of same group show same number of valence electrons.
Therefore, they have similar chemical properties.
For example, nitrogen and phosphorous are both group 15 elements and they show similar chemical properties.
Thus, we can conclude that because they are in the same family, we can predict about these elements that they are chemically reactive in a similar way.
a cheek cell is placed in a concentrated salt solution. what would likely happen to this cell?
Explanation:
A cell place in salty solution would loose water
as water will move from cell to surrounding hypertonic medium by the process of osmosis to shrivel up.
The clearing of rain forests for agricultural use has led to a decrease in biodiversity in many areas. One potential consequence of deforestation is: *
A an increase in the amount of atmospheric oxygen.
B the loss of plants with potential medicinal uses.
C decrease in soil erosion.
D improved habitats for wildlife.
is mixing salt and pepper physical or chemical change ?
The mixing of salt and pepper is a physical change because they both combine and changes form but there is no change in composition.
What is physical change?The physical change is defined as change in physical properties but there is no change in chemical composition.
The physical change is reversible and this change does not form any new substance.
The chemical change is defined as change in chemical composition. In this change one substance can change in one or more substance.
The chemical change is irreversible as it forms new substance.
Thus, mixing of salt and pepper is a physical change because they both combine and changes form but there is no change in composition.
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Write the complete balanced equation for the decomposition of Fe(ClO3)3. You do not need to make your subscripts smaller; just write them out as regular numbers. For example: Fe(ClO3)3. (4 points)
The complete balanced equation for the decomposition of Fe(ClO₃)₃ (iron(III) chlorate) can be written as follows:
2 Fe(ClO₃)₃ → 2 FeCl₃ + 9 O₂
This equation represents the decomposition of iron(III) chlorate into iron(III) chloride (FeCl₃) and oxygen gas (O₂).
This equation indicates that when two moles of iron(III) chlorate decompose, it forms two moles of iron(III) chloride and releases nine moles of oxygen gas.
Iron(III) chlorate, is a compound composed of iron ions and chlorate ions. Upon decomposition, it breaks down into iron(III) chloride, FeCl₃, and oxygen gas, O₂.
The decomposition process occurs due to the heat energy provided, which breaks the chemical bonds within the chlorate ions, resulting in the formation of different products.
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Which would be easier to seperate, a mixture or a compound
Mixtures are easier to separate than compounds because they can be separated by physical processes without changing the identity of the substances, whereas compounds require chemical reactions to be broken down into their elements.
To answer your question, mixtures are generally easier to separate than compounds. A mixture is a physical blend of two or more components that can be separated into their individual parts using physical methods, without changing the identity of the substances. For example, if you have a mixture of iron filings and sand, you can separate them with a magnet because each component retains its own properties. On the other hand, a compound is a substance that is chemically pure and is formed when two or more elements are combined through a chemical reaction to create a new substance with different properties from its elements.
Separating components of a mixture can be simple or complex depending on whether the mixture is heterogeneous or homogeneous. Heterogeneous mixtures have non-uniform composition and can often be separated by mechanical means. In comparison, homogeneous mixtures (solutions) have uniform composition and potential separation techniques include distillation or crystallization, based on physical properties like boiling point. For example, saltwater can be separated by distillation. Compounds usually require a chemical reaction to be broken down into their constituent elements, such as electrolysis for water.