During her summer vacation, Sherry decides to go to the park to do some rollerblading (1). While rollerblading, she leaves her purse in her car (2). When comes back to her car, she realizes her lips are very dry (3). To remedy this, she gets her lip balm out of her purse (4). When she takes the cap off to apply it, some of it drips out of the tube and makes a mess all over her hands (5). A little irritated, she then goes to the bathroom and cleans the lip balm off of her hands (6).Which sentence from the scenario best shows Sherry's lack of understanding about the physical properties of her lip balm?
Note: Each number represents the sentence that comes before it in the scenario.
Answers
Answer: Sentence (4) is the correct answer.
Explanation:
Physical properties are defined as the properties that does not bring any change in chemical composition of a substance.
For example, density, volume, mass, shape, size etc are all physical properties.
So, when Sherry opens the cap of her lip balm tube then some of it drips because semi-solid state of lip balm has changed into liquid state due to absorption of heat from the car.
This means that there occurs change in only physical property of the lip balm.
Therefore, we can conclude that sentence from the scenario best shows Sherry's lack of understanding about the physical properties of her lip balm is that when she takes the cap off to apply it, some of it drips out of the tube and makes a mess all over her hands.
Related Questions
Only a small fraction of a weak acid ionizes in aqueous solution. What is the percent ionization of a 0.100-M solution of acetic acid, CH3CO2H? CH3CO2H(aq)+H2O(l)⇌H3O+(aq)+CH3CO2−(aq )Ka=1.8×10−5
How does an ion differ from an atom?
Based on their locations in the periodic table, which of these elements would you expect to have the greatest atomic radius?A. cesium (Cs) B. lithium (Li) C. neon (Ne) D. radon (Rn)
Which of the following uses a nonrenewable energy resource to generate energy? A. nuclear power plant B. wind farm C. fireplace that burns wood D. biomass power plant
b. temperature
c. volume
d. moles
Answers
Answers
Answer: False
Explanation:
Metal oxides that dissolve in water, react with water to form basic solutions.
Nonmetal oxides react with water to form acidic solutions.
Final answer:
False. The nature of the solution actually depends on the type of metal oxide. Not all metal oxides will make water acidic when mixed.
Explanation:
The statement that mixing metal oxide with water will result in an acidic solution is generally false.
Actually, the nature of the solution (acidic, basic, or neutral) after mixing metal oxide with water depends on the type of metal oxide. Some metal oxides, particularly those of alkali metals and alkaline earth metals (Group 1 and 2 in the Periodic Table), form basic solutions when dissolved in water. For instance, sodium oxide or magnesium oxide will react with water to form their respective hydroxides, which are basic in nature.
However, certain metal oxides like aluminum oxide or zinc oxide may react with water to form amphoteric solutions (can behave as both acids and bases).
Thus, not all metal oxides will make the water acidic when mixed.
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Answers
Answer: Option (3) is the correct answer.
Explanation:
A reaction in which the concentration of reactants equal to the concentration of products is known as an equilibrium reaction.
For example,
Therefore, we can also say that in an equilibrium reaction rate of forward reaction becomes equal to the backward reaction.
The true statement about a system at equilibrium is that the forward reaction rate is equal to the reverse reaction rate.
What is equilibrium state?
Equilibrium state is that state in which the concentration of reactant as well as of producrs are constant. i.e. not changes.
Equilibrium state of any reaction will be represented by the double headed arrow as:
A + B ⇄ C + D
Given reaction defines that rate of forward reaction is equal to the rate of the backward reaction.
Hence option (3) is correct.
To know more about equilibrium state, visit he below link:
slightly negative
slightly positive
Answers
Explanation
In water molecule, there are 3 atoms which belonged to 2 elements. They are 2 Hatoms and 1 O atom. Oxygen atom is more electronegative than H atom. Hence,Oxygen atom in the water molecule gets a slightly negative chargeon it.
What is electronegativity?
Electronegativity is a value that tells us how an atom can attract electronstowards itself.
It helps us to tell the nature of molecule (as polar or non-polar) and thenature of the bond between atoms (as ionic or covalent).
If the electronegativity is high, then the attraction to the electrons is highunless the attraction to the electrons is low.
If the attraction towards electrons is high, then that atom gains a negativecharge on it.
Answer:
The correct answer is: B
Explanation:
slightly negative
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Answers
The concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.
To determine the concentration of gallium in kilograms per cubic meter, we need to convert the concentration from atomic percent (at%) to kilograms per cubic meter.
The atomic fraction is the ratio of the number of gallium atoms to the total number of atoms in the silicon-gallium mixture.
We need to know the atomic masses of gallium and silicon. The atomic mass of gallium is 69.72 g/mol, and the atomic mass of silicon is 28.09 g/mol.
The atomic fraction of gallium can be calculated using the formula:
Atomic fraction of gallium = (Concentration of gallium in at%) / (Atomic mass of gallium) / [(Concentration of gallium in at%) / (Atomic mass of gallium) + (Concentration of silicon in at%) / (Atomic mass of silicon)]
Plugging in the given values:
Atomic fraction of gallium = (%) / (69.72 g/mol) / [(
at%) / (69.72 g/mol) + (100 -
) at% / (28.09 g/mol)]
Now, let's convert the atomic fraction to the number of gallium atoms per cubic meter. We can use Avogadro's number, to make this conversion.
Number of gallium atoms per cubic meter = Atomic fraction of gallium × Avogadro's number.
Mass of gallium per cubic meter = Number of gallium atoms per cubic meter × (Atomic mass of gallium / 1000)
Therefore, the concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.
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Final answer:
The concentration of gallium in kilograms per cubic meter can be calculated using the atomic mass of gallium and Avogadro's number.
Explanation:
To calculate the concentration of gallium in kilograms per cubic meter, we can use the atomic mass of gallium and Avogadro's number. The concentration in kilograms per cubic meter can be found using the formula:
Concentration (kg/m³) = Concentration (% by mass) x Density (g/cm³) x Atomic Mass (g/mol) / 1000 x Avogadro's Number
First, convert the concentration from at% (atomic percent) to % by mass. Since gallium has an atomic mass of 69.7 g/mol, we can use this value to find the concentration in kilograms per cubic meter.
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Answers
Answer: Option (d) is the correct answer.
Explanation:
A test or experiment in which only one variable is changed at a time in order to verify the result is known as a controlled experiment.
That is only independent variable need to be adjusted with respect to the dependent variable.
Thus, we can conclude that the action to test a piece of treated iron and a piece of untreated iron under the same conditions would be most important to perform in a controlled experiment in the given situation.