Answers
Answer:
b and c since they bulge
Explanation:
Related Questions
6. What is the atomic mass of Hafnium if out of every 200 atoms, 10 have mass 176.00 g/mol, 38 have mass
177.00 g/mol, 54 have mass 178.00 g/mol, 28 have mass 179.00 g/mol, and 70 have mass 180.00 g/mol?
Answers
Answer:
fg
Explanation:
Observe: Turn on Show molecular view, and notice the water molecules. Set the Water volume to 100 mL and the Powder mass to 20 g, and then click Play. Click Pause () after adding the powder. You should now see show some sodium acetate in the water.
What color represents the bonds between the particles of NaC2H3O2?
Click Play. Watch the animation a few times. What happens to the NaC2H3O2 bonds?
What happens to the bonds between water molecules?
Answers
Answer: how old are you
Explanation:
which of these elements has the greatest attraction for electrons in a covalent bond?
A. Se
B. As
C. Br
D. Kr
Answers
Answer:
C) Bromine
Explanation: Bromine needs just one electron to fill its outer shell.
Bromine has the greatest attraction for electrons in a covalent bond because it has the highest electronegativity among the given option as it needs only one electron to complete its octet. Therefore, option (C) is correct.
What are halogens?Halogens are the elements of group 7 of the modern periodic table, which contains five elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
Halogens are generally nonmetals in which fluorine and chlorine are gases at room temperature and bromine is a liquid, iodine and astatine are solids. Halogens are very reactive as they have seven valence electrons and need only one electron to get a noble gas configuration.
As we move left to right in a period the electronegativity increases and all the given elements Se, As, Br and Kr are elements of the same period but the Kr is a noble gas. Therefore, Bromine has the greatest attraction for electrons in a covalent bond.
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How many protons, neutrons, and electrons are there in a neutral atom of 60 Co (cobalt- 60 )?
Answers
Cobalt-60 is comprised of 27 protons, 33 neutrons, and 27 electrons. Nuclear reactors are used to artificially create it.
What is cobalt- 60?A radioactive isotope containing cobalt with something like a half-life of 5.2713 centuries is called cobalt-60 (60Co). Nuclear reactors are used to artificially create it. Neutron irradiation of bulk material of the monoisotopic as well as mononuclidic cobalt element 59 Co is necessary for deliberate industrial manufacture.
The accidentally generated 60 Co in the latter instance (inside the absence of additional cobalt) is mostly the product of many phases involving neutron activation on iron isotopes inside the reactor. Cobalt-60 is comprised of 27 protons, 33 neutrons, and 27 electrons.
Therefore, cobalt-60 is comprised of 27 protons, 33 neutrons, and 27 electrons.
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What happens when the two atoms are fairly close?
Answers
The temperature at which a solid melts is the same as the temperature at which its liquid form solidifies (true or false)
Answers
its false not true................
Answer:
True
Explanation:
This is true because, upon cooling the particles in a liquid loses energy, stops moving and remains constant and the forms a solid.
Therefore we can say the freezing point and melting point occurs at the same temperature
Rank the given objects from having the biggest size to the smallest size Blood cells , virus, atom, electrons , paper
Answers
Answer:
paper, blood cell, virus, electron, atom
Explanation:
C3h8+o2=co2+h2o balance the equation
Answers
need help :( number 5 and 6
Answers
The genesis of a poem for me is usually a cluster of words. The only good metaphor I can think of is a scientific one: dipping a thread into a supersaturated solution to induce crystal formation. I don't think I solve problems in my poetry; I think I uncover the problems.
Number 6.
Unsaturated solutions: found in the vast majority of solutions. eg. blood, soda, alcoholic drinks, cell sap, battery acid.
Supersaturated solutions: invert sugar (a mixture of glucose and fructose), gasses dissolved in crude oil when it is still untapped, some clouds (those that cause cloudbursts).
saturated solution: the carbon dioxide dissolved in sodas (unopened), nitrogen in the air in the earth.
What is the mass of 2.3 x 10²¹ atoms of bromine?
Answers
Answer:0.305g
Explanation:
mass = 79.9x(2.3 x 10^21) / (6.02 x 10^23)
= 0.305
1. The average temperature in Addis Ababa, during the summer, is about 25°C. What is the equivalent Kelvin temperature?
Answers
Answer:
25 + 273= 298k.
Explanation:
I guess it's correct answer
The equivalent Kelvin temperature is 298 K.
What is temperature?Temperature is defined as a measurement of an object's or substance's warmth or coolness in relation to a standard value.
It can also defined as the feature of matter that represents the amount of energy of motion of its constituent components.
Temperature scale is defined as a method of indicating or measuring temperature with respect to a beginning point (0 or zero) and a unit of measurement.
Temperature scale is also defined as a way of calibrating the physical quantity temperature in metrology.
Usually there is three types of temperature scale is used.
Celsius scaleKelvin scaleFahrenheit scaleThus, the equivalent Kelvin temperature is 298 K.
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Using the standardized NaOH solution in the previous
question, the titration of 5.00 mL of vinegar required
42.25 mL of NaOH. What is the % of acetic acid in the
vinegar? Previous standardized NaOH solution = 0.098
Answers
Answer: Using the standardized NaOH solution in the previous question, the titration of 5.00 mL of vinegar required 42.25 mL of NaOH. What is the % of acetic acid in the vinegar? Concentration of NaOH from previous question= 0.0986 M. David C.
Explanation:
Please mark as brainliest for me.Thank you so much
The percentage of acetic acid in vinegar is 4.988 %., When the titration of 5.00 mL of vinegar required 42.25 mL of NaOH.
What is titration?Titration is defined as the process of chemical analysis method in which the amount of a sample's constituent is determined by mixing a precisely measured amount of the desired constituent with another material in a precise, known proportion. The equivalence point, or the point at which chemically equivalent amounts of the reactants have been combined, is to be detected by the titration.
According to the titration principle, V1=the volume of acetic acid and V1S1=V2S2
S1 is the acetic acid's strength
V1 = 42.25 ml * 0.0986 M / 5 ml = 0.833 M where V2 = Volume of NaOH S2 = Strength of NaOH
Hence, 1000 ml Vinegar contains 0.833 moles of acetic acid per 100 ml of vinegar (0.0833*60). G=4.998 grams of acetic acid
The amount of acetic acid in vinegar is 4.988%.
Thus, the percentage of acetic acid in vinegar is 4.988 %., When the titration of 5.00 mL of vinegar required 42.25 mL of NaOH.
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PLEASE EXPLAIN I KNOW THE ANSWER I NEED AN EXPLAINATION
The potential energy as a function of internuclear distance for three diatomic molecules, X2, Y2, and Z2, is shown in the graph above. Based on the data in the graph, which of the following
Answers
From the graph shown, Y2 = N2, X2 = O2, Z2 = H2.
When atoms of elements are at a large distance from each other, the potential energy of the system is high. However, as the atoms approach each other, the potential energy of the system decreases steadily. The closer the atoms come to each other, the lower the potential energy. This implies that potential energy is proportional to bond length.
Since N2 has a shorter bond length and higher energy, Y2 must be N2. The bond energy of hydrogen is small hence H2 must be X2. The bond energy of a double bond is intermediate between that of a single and triple bond hence Z2 must be O2.
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Which of the following has more atoms?
One mole of zinc
One mole of gold
One mole of silver
One mole of magnesium
O They all have the same number of atoms
Answers
Answer:
They all have the same number of atoms
Explanation:
Which of the following has more atoms?
One mole of zinc
One mole of gold
One mole of silver
One mole of magnesium contians
O They all have the same number of atomst
a mole of anything contains Avogadros number of 6.022X10^23 things
which has the greatest number of thing? a dozen eggs, a dozen cookies, a dozen pizzas?
a dozen is a number means 12
a mole is a number that that means 6.022 X 10^23 you calculate the molar mass from the chemical formula, but every j mole contains 6.022X10^23
particles.
just like every dozen contains 12
so
They all have the same number of atoms
How many grams are in 0.990 mol of neon?
mass in grams:
Answers
Explanation:
Multiply the given moles times the molar mass of neon, 20.180 g/mol (periodic table).
Answer:
Multiply the supplied moles by 20.180 g/mol, the molar mass of neon (periodic table).
Explanation:
what happens to the matter in water as it evaporates
Answers
Answer:
It changes from a liquid to a gas. I hope this helps you! :D
Hydrocarbons are molecules that consist entirely of carbon and hydrogen atoms and are classified by their bond structure.
a. True
b. False
Answers
Answer:
true
Explanation:
hydrogen and carbon make hydrocarbons
Il See Periodic Table See Hint
A gas composed of chlorine and oxygen has a density of 2.875 g/L at 750.0 mm Hg and 11°C. What is the most likely molecular formula
of the gas?
х
х
He
01
Answers
The molecular formula shows the number of atoms present. The molecular formula of the gas is most likely ClO2.
In terms of gas density and molar mass, the ideal gas equation can be written in the form; PM = dRT
Where;
P = pressure of the gas
M = molar mass of the gas
d = density of the gas
R = molar gas constant
T = temperature of the gas
Making the molar mass of the gas the subject of the formula;
M = dRT/P
d = 2.875 g/L
R = 0.082 atmLmol-1K-1
T = 11°C + 273 = 284 K
P = 750.0 mm Hg or 0.99 atm
Substituting values;
M = 2.875 g/L × 0.082 atmLmol-1K-1 × 284 K/ 0.99 atm
M = 67.6 g/mol
The gas is most likely ClO2.
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helppppppppppppppppppppppppppppp
Answers
Answer:
any form of water that falls from the sky
Identify the one thing that you were most surprised by in the quiz. Explain
why.
Answers
Adhesion is the attraction of molecules of one kind for molecules of a different kind... water is adhesive because the water molecules are attracted to the straw and therefore adhere to it. Thus, adhesive forces are important for sustaining life. This is because of these forces, water can flow up from the roots to the tops of plants to feed the plant, allowing it to move against gravity through plant cells. Another example of why its important that water is adhesive is the movement of water to the tops of trees and the drainage of tears from tear ducts in the corners of your eyes. Or how water droplets stick to the end of the pine needles. These are all examples of adhesion.
Hope this helped you- have a good day bro cya)
which among the materials have a varying amount of components are they compounds or mixtures
Answers
Answer:
Matter can be broken down into two Zalo categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.
what is the product of the following reaction? Cd+Znso
A. Zn+CdSO4
B. H2+CdSO4
C. H2+ZnSO4
D. H2+Zn
E. No reaction
Answers
Answer:
Cd + ZnSO4 -----> Zn + CdSO4
Explanation:
:)
WHAT IS THE COLOR OF METHYL ORANGE
1. YELLOW
2. PINK
3. ORANGE
Answers
Answer:
3.Orange it literally say's it methyl ORANGE
Explanation:
Brainliest plz
Answer:
Other indicators
Indicator Acidic Alkaline
Methyl orange Red Yellow
Phenolphthalein Colourless Pink
Explain why the nucleus of an atom is positively charged but the overall charge of an atom is neutral
Answers
Answer:
The nucleus is positively charged because it contains all of the protons however the charge of an atom is neutral because there is an equal amount of protons (positive) and electrons (negative) meaning the opposite charges cancel each other out therefore making the atoms overall charge neutral.
Explanation:
Which pair of compounds has the same empirical formula? C_{3}*H_{8} and C_{3}*H. C_{2}*H_{2} and C_{2}*H C_{4}*H_{10} and C_{6}*H C_{4}*H_{10} and C_{2}*H_{5}
Answers
Considering the definition of empirical and molecular formula, the pair of compounds C₄H₁₀ and C₂H₅ has the same empirical formula.
The empirical formula is the simplest expression to represent a chemical compound and indicates the elements that are present and the minimum proportion in whole numbers that there are between their atoms. This formula is also known as the "minimum formula".
On the other side, the molecular formula is the chemical formula that indicates the number and type of different atoms present in the molecule. But unlike the chemical formula, it shows the actual number of atoms that make up a molecule.
In this case, you can observe that if you divide the amount of each element by 2 in compound C₄H₁₀, you get C₂H₅, which is the empirical formula of the compound.
Finally, the pair of compounds C₄H₁₀ and C₂H₅ has the same empirical formula.
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https://brainly.com/question/6960643Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are mixed. If a precipitate will form, enter its empirical
formula in the last column.
solution A
solution B
Does a
precipitate form
when A and B
are mixed?
Oyes no
empirical
formula of
precipitate
х
X
x
5
?
copper(II) chloride
sodium sulfide
potassium sulfate
O yes no
lead(II) nitrate
ammonium bromide
sodium hydroxide
O yes no
Que
Answers
The reaction between copper II chloride and sodium sulfide as well as lead II nitrate and potassium sulfate both produce precipitates.
The solubility of a substance in water is in accordance with the solubility rules. It is possible that a solid product may be formed when two aqueous solutions are mixed together. That solid product is referred to as a precipitate.
Now, we will consider each reaction individually to decode whether or not a precipitate is possible.
In the first reaction, we have; CuCl2(aq) + Na2S(aq) ---->CuS(s) + 2NaCl(aq). A precipitate (CuS) is formed.In the second reaction, Pb(NO3)2(aq) + 2KNO3(aq) ----> PbSO4(s) + KNO3(aq), a precipitate PbSO4 is formedIn the third reaction, NH4Br(aq) + NaOH(aq) ----->NH3(g) + NaBr(aq) + H2O(l), a precipitate is not formed here.Learn more: https://brainly.com/question/11969651
When excess potassium hydroxide and H2SeO3 react whats the net ionic reaction for the acid-base rxn
Answers
The required net ionic equation is; 2H^+(aq) + 2OH^-(aq)-----> 2H2O(l)
The molecular reaction equation is;
H2SeO3(aq) + 2KOH(aq) -----> K2SeO3(aq) + 2H2O(l)
The complete ionic equation is;
2H^+(aq) + SeO3^2-(aq) + 2K^+(aq) + 2OH^-(aq)-----> 2K^+(aq) + SeO3^2-(aq) + 2H2O(l)
Net ionic equation;
2H^+(aq) + 2OH^-(aq)-----> 2H2O(l)
We can clearly see that this is a neutralization reaction hence water is the product of the net ionic equation.
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Write the full electron configuration for an N2− ion
Answers
Answer:
The full electron configuration for an N2− ion is 1s^2 2s^2 2p^5
The electronic configuration of the N²⁻ ion is 1s²2s²2p⁵.
What is an electronic configuration?The electron configuration can be described as how electrons are distributed in different energy levels or electron shells of an atom of an element. In the electron configuration of an atom, the number of electrons can be written as a superscript of electron atomic subshells. For example, the electron configuration of magnesium can be written as 1s²2s²2p⁶3s².
The principal quantum number (n) can be defined as the maximum number of electrons that can be filled in an electron shell of an atom. The formula used to determine is 2n², where ‘n’ is the principal quantum number.
The atomic number of the nitrogen atom is 7 and the electronic configuration is 1s²2s²2p³. When it gains two electrons then it has 9 electrons in total. The nine electrons can be filled as 1s²2s²2p⁵.
Therefore, the electronic configuration of the N²⁻ ion is 1s²2s²2p⁵.
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Based on their composition and structure, list CH3COCH3
C
H
3
C
O
C
H
3
, CH3CH(CH3)CH3
C
H
3
C
H
(
C
H
3
)
C
H
3
, and CH3COOH
C
H
3
C
O
O
H
in order of decreasing intermolecular forces.
Answers
Answer:
in order of decreasing intermolecular forces.
CH3COOH acetic acid
CH3COCH3 acetone or IUPAC propanone
, CH3CH(CH3)CH3 isobutane or IUPAC 2 methyl propane
Explanation:
Based on their composition and structure, list
CH3COCH3
this ketone has the middle intermolecular forces
, CH3CH(CH3)CH3
this hydrocarbon has the lowest intermolecular forces
, and CH3COOH
this carboxylic acid has the greatest intermolecular forces
in order of decreasing intermolecular forces.
CH3COOH acetic acid
CH3COCH3 acetone or IUPAC propanone
, CH3CH(CH3)CH3 isobutane or IUPAC 2 methyl propane
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