Answer:
Both involve the formation of gas.
Answer:
A Both involve the formation of a gas.
Explanation:
Sublimation occurs when it passes from the solid-state to the gaseous state without going through the liquid state.
Evaporation occurs when it passes from the liquid state to the gaseous state.
These processes have in common that the final state they reach is the gaseous state.
Among the following, which atom is most likely to form an ion with a charge of 2+?
Ca
Al
Na
O
Calcium (Ca) is the atom that most likely forms a 2+ ion, due to its position in group 2 of the periodic table, which defines it as an alkaline earth metal.
Among the following, the atom most likely to form an ion with a charge of 2+ is Ca (Calcium). Calcium belongs to the alkaline earth metals (group 2) in the periodic table and tends to lose two electrons to form a cation with a 2+ charge, becoming Ca2+. This ion has 20 protons and 18 electrons, having the same number of electrons as an atom of the preceding noble gas, argon.
The concept of empiricism states that all rationally accepted knowledge is determined from experience. Francis bacon was one of the first scientists to promote this theory. What was it’s impact on society?
the answer is option D "people emphasized obtaining knowledge through scientific experiments" (on plato)
Dry ice will go directly from a solid to a gas at room temperature. Going directly from a solid to a gas is called_____________
Answer:
When a solid changes into a gas, it is called sublimation.
Explanation:
Answer:
Sublimatiom
Explanation:
Xander lit his Bunsen burner. He then reached over the burner to get his chemicals. He performed the lab, but at the end, he dropped a test tube on the ground. He immediately told his teacher, who cleaned it up so he could finish the lab. Once finished, he then cleaned up his area.
Which best describes his error?
Answer:
He should not have reached over the burner while it was on. he should have shut it off first.
Explanation:
Final answer:
Xander's primary error was safety-related by reaching over an ignited Bunsen burner, risking burns or fire. Additionally, promptly reporting the dropped test tube was correct but underscores the need for immediate action when accidents occur. Cleaning up at the end demonstrated proper protocol adherence.
Explanation:
The error made by Xander in the laboratory scenario involves a breach in safety protocol while working with a Bunsen burner. When he reached over the burner to get his chemicals, he exposed his arms or potentially loose clothing to the flame, creating a risk of burns or catching fire. This action is against standard laboratory safety rules, which dictate that individuals should keep all body parts and flammable materials away from open flames to prevent accidents.
Additionally, after dropping a test tube, he should have practiced proper spill protocol, which includes notifying the teacher immediately, not just at the end of the lab session. Although he did this correctly, it is also important to note that all incidents and accidents should be reported promptly to prevent any hazardous conditions from persisting.
Lastly, it's essential to maintain cleanliness in the lab by promptly cleaning up any spilled materials and disinfecting the workspace, along with ensuring the proper shutdown of the burner and sealing of chemical containers at the end of the practical. Xander's final act of cleaning up his area aligned with correct laboratory procedures.
A triple covalent bond involves two atoms sharing three pairs of electrons.
True
False
Covalent bonds are formed by electron sharing. One single covalent bond shares a pair of electrons. Hence a triple bond is sharing three pairs of electrons. Thus, the statement is true.
What is covalent bond?Covalent bond is a type of bond formed by the sharing of electrons between two atoms. The two atoms might be of comparable electronegativities.
Atoms which are deficient in electrons will gain or share electrons with other atoms. Two atoms both are electron deficient will share their valence electrons each other.
A single covalent bond is the two electrons shared by each atoms in the bond thus a pair of electrons. Double bond is thus two pair or four electrons. Therefore, a triple covalent bond involves two atoms sharing three pairs of electrons.
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one nanometer is equal to how many meters?
Answer:
1 nanometer= 1e-9 meters
Explanation:
Answer:
One nanometer is equal to 1e-9 meters.
Explanation:
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5. What is the mass of 9.80 x 1023 formula units of zinc chlorate, Zn(CO3)2?
Answer:
[tex]\boxed{\text{378 g}}[/tex]
Explanation:
We must convert formula units of Zn(ClO₃)₂ to moles and then to grams of Zn(ClO₃)₂.
Step 1. Convert formula units to moles
[tex]\text{Moles of Zn(ClO$_{3}$)$_{2}$}\\\\= 9.80 \times10^{23}\text{ formula units Zn(ClO$_{3}$)$_{2}$} \times \dfrac{\text{1 mol Zn(ClO$_{3}$)$_{2}$}}{6.022 \times\ 10^{23} \text{ formula units Zn(ClO$_{3}$)$_{2}$}}\\\\= \text{1.627 mol Zn(ClO$_{3}$)$_{2}$}[/tex]
Step 2. Convert moles to grams
[tex]\text{Mass of Zn(ClO$_{3}$)$_{2}$}\\\\= \text{1.627 mol Zn(ClO$_{3}$)$_{2}$} \times \dfrac{\text{232.29 g Zn(ClO$_{3}$)$_{2}$}}{\text{1 mol Zn(ClO$_{3}$)$_{2}$}}\\\\= \text{378 g Zn(ClO$_{3}$)$_{2}$}\\\\\text{The mass of Zn(ClO$_{3}$)$_{2}$ is } \boxed{\textbf{378 g}}[/tex]
To find the mass of 9.80 x 10^23 formula units of zinc chlorate, the molar mass of the compound must be determined using atomic masses, then this mass is compared to Avogadro's number to find the proportionate mass.
Explanation:The mass of 9.80 x 1023 formula units of zinc chlorate can be calculated using Avogadro's number and the molar mass of zinc chlorate, Zn(CO3)2. First, we must find the molar mass of zinc chlorate by adding the atomic masses of the zinc atom, two chlorine atoms, and six oxygen atoms. Using the periodic table, we can determine this value (not provided in the question, so you will need to calculate it yourself). Then, to find the mass of 9.80 x 1023 formula units, we use the ratio of 1 mole being equivalent to 6.022 x 1023 formula units.
If 1 mole of zinc chlorate weighs the calculated molar mass and corresponds to 6.022 x 1023 formula units, we can set up a proportion to calculate the mass of 9.80 x 1023 formula units:
Molar mass of Zn(CO3)2 / 6.022 x 1023 = Desired mass / 9.80 x 1023
After cross-multiplying and solving the equation, we obtain the desired mass of zinc chlorate. It is important to note that the student should verify the molar mass of zinc chlorate themselves, as the information is not specified in the question's context.
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A baker touches a pie right after taking it out of the oven. Which statement best explains why the pie feels hot?
Answer:
it just got out the oven
Explanation
if it just got out the oven the of course it is going to be hot
Select the most likely product for this reaction:
KOH(aq) + CO2(g) – ?
K2CO3(aq) + H2O(1)
K(s) + H2(g) + O2(g)
K(s) + CO3(9) +H2
Answer:
K2CO3(aq) + H2O(l)
Explanation:
Balance the equation
2KOH(aq) + CO2(g) ------ K2CO3(aq) + H2O(l)
Answer:
K2CO3(aq) + H2O(1)
Explanation:
KOH(aq) + CO2(g) is an acid-base reaction.
KOH is a known base and CO2 is a known acidic gas. It dissolves in water to give a solution whose pH is less than 7.
The normal products of a neutralization process is the salt and water. Hence, this neutralization process isn't any different. Salt, in the form of K2CO3, and water, H2O is the result of this reaction.
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If the pH of a solution is 7.6, what is the pOH?
Answer:
6.4
Explanation:
PH +POH=14
POH=14-7.6
=7.6
The pOH of a solution with a pH of 7.6 is 6.4, which indicates that the solution is slightly basic.
If the pH of a solution is 7.6, to find the pOH, we use the relationship:
pH + pOH = 14
Given that the pH is 7.6, we subtract this from 14 to find the pOH:
pOH = 14 - pH
pOH = 14 - 7.6
pOH = 6.4
Therefore, the pOH of the solution is 6.4, indicating that the solution is slightly basic, because a pOH of less than 7 signifies a basic solution.