Acetone is a common solvent and has a density of 0.7899 g/mL. What volume of acetone, in mL, has a mass of 29.3 g?
Answers
We get: M = 29.3, and D = 0.7899, And V = ?
The formula to find the volume is:
So we get:
So, the volume of acetone when it have a mass of 29.3 grams is about 37.09 milliliters
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What is the total number of protons in the nucleus of an atom of potassium-42?
ANSWER FAST WILL GIVE BRAINLISTAn ionic compound is typically made of A. two metals. B. two nonmetals. C. a metal and a nonmetal. D. none of the above.An ionic compound is typically made of A. two metals. B. two nonmetals. C. a metal and a nonmetal. D. none of the above.
Put these events in order.= Your phone contacts a base station in a cell.= Once connected, a duplex system allows you to talk to the other person at the same time.= You dial a number on your cell phone.The MTSO then connects you to the other device.= A base station contacts the Mobile Telephone Switching Office (MTSO).
Define equivalent weight of an element​
Answers
Answer:
Atomic Number = 3.
Explanation:
The number of protons determines the atomic number. Basically the number of protons is the exact same as the atomic number.
Protons 3 = Atomic number 3
(fixed composition) or_____
(variable composition)
Answers
Mixtures can be either fixed composition or variable composition.
A fixed composition mixture is a mixture that has a constant and unchanging composition, meaning that the proportions of the components remain the same throughout the mixture. Examples of fixed-composition mixtures include solutions, suspensions, and colloids. In a solution, for example, the solute is dissolved in the solvent in a specific ratio, and the composition of the solution remains constant. In a suspension, the particles of one substance are suspended in another substance, but the composition of the suspension remains constant. In a colloid, the particles of one substance are dispersed throughout another substance, but the composition of the colloid remains constant.
On the other hand, a variable composition mixture is a mixture that can change its composition over time. Examples of variable composition mixtures include gases and solutions that are not in equilibrium. In a gas, the molecules are free to move and interact with each other, so the composition of the gas can change over time. In a solution that is not in equilibrium, the components can separate or mix over time, leading to changes in the composition of the solution.
It's important to note that the composition of a mixture can be influenced by a variety of factors, including temperature, pressure, and the presence of other substances. For example, the composition of a solution can be affected by changes in temperature, as the solute and solvent can interact differently at different temperatures. Similarly, the composition of a gas can be affected by changes in pressure, as the molecules can move more or less freely at different pressures.
In conclusion, mixtures can be either fixed composition or variable composition, and the composition of a mixture can be influenced by a variety of factors. It's important to understand the composition of a mixture in order to understand its properties and behavior.
the rate of evaporation equals the rate of condensation.
the rate of condensation decreases to zero.
the rate of condensation exceeds the rate of evaporation.
Answers
Let us study about it .
Explanation:
Evaporation
It is the process of converting liquid into vapors .
Condensation
It is the process of converting vapors back into liquid state .
- Suppose if we have a sealed container and we are supplying it with no or little heat , we will see that as we increase heat , the particles starts moving faster .
- When they move they also colloide and transfer energies .
- The kinetic energies of certain molecule increase to an extent that they leave the other particles and escape in atmosphere .
- That is evaporation occurs .At the same time when these vapors collide with each other or with the walls of container they get cooled and again get converted to liquid state .
It is seen that a equilibrium is reached when "rate of evaporation becomes equal to rate of condensation ".
b.oxygen and nitrogen gases in the air
c.oil and vinegar salad dressing
d.a silver mercury amalgam used to fill a tooth cavity
Answers
B: U carries 2 e- and 2 H+, cytochrome C carries 1 e- and no H+
C: U pumps 2 H+ into IMM from matrix, cytochrome C pumps 1 H+
Answers
The correct Statement is B: U carries 2 e- and 2 H+, cytochrome C carries 1 e- and no H+. It claims that ubiquinone carries 2 electrons and 2 protons, whereas cytochrome C carries 1 electron and no protons, is not a difference between the two but a similarity.
The statement that is NOT a difference between cytochrome C and ubiquinone (U) is Option B: U carries 2 e- and 2 H+, cytochrome C carries 1 e- and no H+. This is because both molecules act as electron carriers, with ubiquinone carrying two electrons and two protons (H+), while cytochrome C can only carry one electron without carrying a proton.
Moreover, in Statement A and Statement C, ubiquinone and cytochrome c play different roles in the electron transport chain, therefore those statements describe actual differences between ubiquinone and cytochrome C.
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Answers
The electron is the primary atomic particle that determines an atom's chemical behaviour.
Electrons are negatively charged particles that form electron shells or energy levels around an atom's nucleus. They are engaged in the production and breaking of chemical bonds, hence they play an important part in chemical reactions.
The quantity and configuration of electrons in an atom's outermost energy level (valence electrons) are very significant in determining the chemical characteristics of the atom. Because of the identical number of valence electrons, elements in the same group or column of the periodic table frequently show similar chemical behaviour.
To know more about electron, here:
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