1. List the types of fronts found on this map
Answer:
Cold Front. A side view of a cold front (A, top) and how it is represented on a weather map (B, bottom). ...
Warm Front. ...
Stationary Front. ...
Occluded Front.
How many moles are in 6.7x10^23 formula units of NaCI?
A. 872 moles.
B. 3.87x10^24 moles.
C. 21.07 moles.
D. 1.1 moles.
Answer:
UNIT 10
1.) A cylinder is filled with 2.00 moles of nitrogen, 3.00 moles of . If
the gas mixture is at STP, what is the partial pressure of the argon?
(A) 152 torr (B) 228 torr (C) 380. torr (D) 760. torr
2.) Compared to the average kinetic energy of 1 mole of water at 0 oC, the average kinetic energy
of 1 mole of water at 298 K is
(A) the same, and the number of molecules is the same
3.) If the pressure on a given mass of gas in a closed system is increased and the temperature
remains constant, the volume of the gas will
(A) decrease (B) increase (C) remain the same
4.) Which gas has approximately the same density as C2H6 at STP?
(A) NO (B) NH3 (C) H2S (D) SO2
5.) At a temperature of 273 K, a 400. milliliter gas sample has a pressure of 760. millimeters of
mercury. If the pressure is changed to 380. millimeters of mercury, at which temperature will
this gas sample have a volume of 551 milliliters?
(A) 100 K (B) 188 K (C) 273 K (D) 546 K
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Give a brief background of the development of nuclear power.
Answer:
Nuclear began in the 1930s, when physicist Enrico Fermi first showed that neutrons could split atoms. Fermi led a team that in 1942 achieved the first nuclear chain reaction, under a stadium at the University of Chicago
Please help me, Thank you!
Answer:
B. Opposite
Explanation:
When one electron is transferred from sodium to chlorine, a pair of ions with oppositely charged ions is formed.
The electrostatic attraction between the ions forms a covalent bond between them.
When atoms lose or gain electrons, they become ions due to the charge imbalance within them. If sodium lose an electron, it becomes positively charged. when the electron is gained by chlorine, it becomes negatively charged These oppositely charged ions combined to form the ionic compound.03:58:40
If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?
Total energy increases.
Stored energy decreases.
Energy of motion decreases.
Total energy decreases.
Answer:
If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result? Total energy increases.
Answer:
its C energy of motion decreases
Explanation:
i got it right on the edge 2021 unit test UvU
and if u dont trust me then get it rong with the other person （︶^︶）
Which statement defines the heat capacity of a sample?
the temperature of a given substance
the temperature that a given sample can withstand
the quantity of heat that is required to raise the sample’s temperature by 1°C (or Kelvin)
the quantity of heat that is required to raise 1 g of the sample by 1°C (or Kelvin) at a given pressure
Answer:
b
Explanation:
Answer:
D. the quantity of heat that is required to raise 1 g of the sample by 1°C (or Kelvin) at a given pressure
Explanation:
Is nitrogen an element or compound?
Answer:
Nitrogen is an element that can combine with itself or with other elements to make different compounds. For instance nitrogen gas, N2, is a compound made when two nitrogen atoms form a chemical bond.
Explanation:
Answer:
element
Explanation:
it can combine with itself or with other elements to make compounds
What is the name of the ionic compound CaO?
calcium oxygen
calcium oxide
calcium(I) oxide
calcium(II) oxide
Answer:
Calcium Oxide.
Explanation:
Ca + O = CaO.
Calcium + Oxygen = Calcium Oxide.
The name of the ionic compound CaO is calcium oxide. The correct option is b.
What are ionic compounds?Positively charged ions, known as cations, and negatively charged ions, known as anions, make up ionic compounds, which are neutral substances.
The name of the cation is written first, followed by the name of the anion, for binary ionic compounds (ionic compounds that only contain two types of elements).
Calcium oxide is a chemical compound that is also called quicklime. It is used as a crystalline solid and is caustic in nature. It is used as desulfurization for the material. It is also called burnt lime.
The compound contains calcium and oxygen, whose symbols are Ca and O.
Ca + O = Cao
Therefore, the correct option is b. calcium oxide.
To learn more about calcium oxygen, refer to the link:
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If there are 50 grams of a radioactive element how much will be present after 1 half life,2,half life, and 3 half life
Answer:
6.25g
a half life will take away half of the element so you wouldjut divide by 2 three times
Explanation:
Answer:
1HL- 25g, 2HL- 12.5g, 3HL- 6.25g
Explanation:
When trying to calculate Half Lives (HL) you want to make sure that you divide by 2 every time as a half life cuts the amount in half so 50/2=25(1HL) 25/2=12.5(2HL) 12.5/2=6.25(3HL) and of course dont forget the unit which is grams
Please help me, Thank you!
Compare heat and thermal energy. Correct answers please. Or I’ll report you(:
Which of the following was NOT used in support of the continental drift hypothesis?
fossil evidence
fit of South America and Africa
mountain ranges across continents
differences in ocean salinity levels
Answer:
fossil evidence
fit of South America and Africa
Explanation: can i have brainlist please
How are cancer cells different that normal cells
Answer:
I have that same photo (I always where that combo lol)
Explanation:
In contrast to normal cells, cancer cells don't stop growing and dividing, this uncontrolled cell growth results in the formation of a tumor. Cancer cells have more genetic changes compared to normal cells, however not all changes cause cancer, they may be a result of it.
Answer: Can i have Brainliest & 100 POINTS
Explanation:
3. A solution that can hold more solute is called
Answer:
A solution that can hold more solute is called. saturated.What is diffusion?
Class 9th
Chemistry
Diffusion is the movement of a substance from an area of high concentration to an area of low concentration . Diffusion happens in liquids and gases because their particles move randomly from place to place . Diffusion is an important process for living things ; it is how substances move in and out of cells .
Pls follow me and Mark as brainlest :-)
Answer:
diffusion is a means of transport, which occurs through cells . for example exchange of gases that takes place in alveoli occurs due to diffusion.
Explanation:
in diffusion the object or fluid moves from region of higher concentration to the region of lower concentration.
Oh my god sadddddddddddddddddd
Answer:
sad? that your giving out free points?
Explanation:
Answer:
what wrong
tell i can help u
Explanation:
Convert the following word equations into formula equations by changing element and compound names into chemical formulas.
1. sodium + oxygen → sodium oxide
2. copper + silver nitrate → copper(II) nitrate + silver
3. aluminum chlorate + barium sulfate → aluminum sulfate + barium chlorate
4. bromine + calcium iodide → calcium bromide + iodine
5. zinc sulfide + magnesium arsenate → zinc arsenate + magnesium sulfide
6. cobalt + lead(II) nitrite → cobalt(III) nitrite + lead
7. potassium + water → potassium hydroxide + hydrogen
Answer:
Na + O.2 = NaO.2 whereas Cu + AgNo3 = Cu.2No.3 +AG
The given reactions can be converted to equations as follows:
1. 2 Na + O2 → 2 Na2O
2. Cu + 2 AgNO3 → Cu(NO3)2 + 2 Ag
What is a balanced chemical equation ?A balanced chemical equation is a representation of a chemical reaction using chemical formulas of reactants and products. It shows the number of atoms of each element on both the reactant and product sides of the equation.
The equation is balanced when the number of atoms of each element is the same on both sides of the equation.
The given reactions can be written as balanced equations as follows:
2 Na + O₂ → 2 Na₂O2. Cu + 2 AgNO₃ → Cu(NO₃)₂ + 2 Ag2 Al(ClO₃)₃ + 3 BaSO4 → Al2(SO₄)₃ + 3 Ba(ClO₃)₂Br₂ + CaI₂ → CaBr₂ + I₂ZnS + Mg₃(AsO₄)2 → Zn₃(AsO₄)₂ + 3 MgSCo + 2 Pb(NO₂)₂ → Co(NO₂)₂ + 2 Pb2 K + 2 H₂O → 2 KOH + H₂Find more on balanced chemical equations :
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In a lab, a student calculates the density of a piece of silver to be 8.74 g/cm3. The actual density of silver is 10.49 g/cm3. What was the student's percent error? Round your answer to 1 decimal place and be sure to include units
Answer:
16.7%
Explanation:
From the question given above, the following data were obtained:
Measured density = 8.74 g/cm³
Actual density = 10.49 g/cm³
Percentage error =?
The percentage error of the student can be obtained by using the following formula:
Percentage error = | measured – Actual | / Actual × 100
Percentage error = | 8.74 – 10.49 |/10.49 × 100
Percentage error = 1.75 / 10.49 × 100
Percentage error = 16.7%
Therefore, the percentage error of the student is 16.7%
DUE IN A FEW!!!!!! PLS HELP
Answer:
the answer is is C 465 grams
Elimination of HBr from 2-bromobutane affords a mixture of but-1-ene and but-2-ene. With sodium ethoxide as base, but-2-ene constitutes 81% of the alkene products, but with potassium tert-butoxide, but-2-ene constitutes only 67% of the alkene products. Offer an explanation for this difference.
Answer:
see explanation
Explanation:
The elimination reaction involving 2-bromobutane leads to the formation of two products with the predominant product depending on the nature of the base used.
With a bulky base such as potassium tert-butoxide, the secondary carbon atom is inaccessible due to steric hindrance. Therefore, but-1-ene predominates (higher percentage).
However, when a less bulky base such as sodium ethoxide is used, the secondary carbon atom is more easily accessible, leading to the predominant formation of the thermodynamically favourable but-2-ene.
What does the Atomic Number tell you? the amounr of electronstprorons
How can you find the number of electron shells by looking at an Atom's location on the Periodic Table?
Answer
Atomic number or proton number tells us the number of protons found in the nucleus of every atom of that element
Explanation:
A supercomputer, nicknamed Roadrunner, built by IBM for the Los Alamos National Labs can perform about 1.03 petaflop/s (1 petaflop is 1015 calculations). Determine how many seconds it would take this computer to count a mole of things. Convert this figure into years.
Answer:
18.5 years
Explanation:
(6 x 10^23)/(10^15 x 1.03 x 3600 x 24 x 365)
Hope this helps!
A small amount of solid potassium dichromate is added to water and stirred until all of the solid has dissolved and a clear orange liquid is produced. This process may be described as: Group of answer choices the formation of a heterogeneous mixture. dissolution of the molecular compound sublimation. dissolution and dissociation of the ionic compound.
Answer: dissolution and dissociation of the ionic compound.
Explanation:
Ionic compound is formed by the transfer of electrons.
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here potassium metal forms [tex]K^+[/tex] cation and [tex]Cr_2O_7^{2-}[/tex] anion which exchange their oxidation states to form [tex]K_2Cr_2O_7[/tex].
When ionic compound is dissolved in water, it dissociates to its respective ions.The ions form bonds with oppositely charged ions of water molecules and thus get dissolved in water called as dissolution.
What is unique about the way that transition metals form compounds?
a. They don't form compounds
C. They can form bonds with the electrons in the
two outer-most shells
b. They are the most reactive
d. They can donate all of their electrons
Answer:
A. They don't form compounds
Explanation:
High density: The strong bonding between the atoms in transition metals cause them to be tightly held together, creating a high density. Colored compounds: Transition metals tend to form more colored compounds than other elements, either in solid form or dissolved in a solvent.Answer:
they can form bonds with the electrons in the two outer most shells
how can you tell which compound in a solution is the solvent?
(own words please)
Answer:
The way you can know which compound in a solution is a solvent is by usually just determining which substance is a solute and which is a solvent. The solute is when it is dissolved and it takes on the characteristics of the solvent.
Explanation:
Hope this helps!
Magnetic Quantum Number tells you what? how many orbitals are in s, p ,d?
Plisss help I’ll give you brainless Waves can be identified in many different ways. Using the diagram below, identify
which property of a wave is shown by the part of the diagram labeled F?
Answer:
Wavelength
Explanation:
Temperature is a measure of __________ movement.
Hint: It includes two words.
Answer:
Kinetic Energy
Explanation:
Temperature is a measure of the average kinetic energy of the particles in a substance. And also Kinetic Energy has 2 words.
what is ionizable hydrogen and why we say it replaceable hydrogen
Answer:
only hydrogen atoms that are part of a highly polar covalent bond are ionizable. The hydrogen atom is attracted to the lone pair of electrons in a water molecule when HCl is dissolved in water. The result is that the H−Cl bond breaks, with both bonding electrons remaining with the Cl, forming a chloride ion.
Explanation:
Answer:
In an acid molecule, hydrogen atoms may be substituted by metal atoms.
Explanation:
It is ionizable only to hydrogen atoms that are part of a strongly polar covalent bond. As HCl is dissolved in water, the hydrogen atom is drawn to the lone pair of electrons in a water molecule. The effect is that the H-Cl bond splits, with the Cl remaining with both bonding electrons, forming a chloride ion.
a Use carbon's position in the Periodic Table to explain why carbon normally
forms four covalent bonds.
