Answer Fast Please!!!
Which of the following statements is true?
The Periodic Table is organized in order of atomic number.
Substances in a mixture lose their unique properties.
Elements in the same period have similar properties.
Heterogenous mixtures are also called solutions.
Answer:
I believe it is A. The Periodic Table is organized in order of atomic number.
Explanation:
1. Rank the following solutions in order of increasing
concentration: Solution A, 0.5 moles of sucrose
in 2.0 liters of solution; Solution B, 1.0 moles of
sucrose in 3.0 liters of solution; Solution C,
1.5 moles of sucrose in 4.0 liters of solution.
The order of the solutions from lowest to highest concentration : A, B, C
Further explanationGiven
the following solutions
Required
order of increasing concentration
Solution
Molarity shows the number of moles of solute in every 1 liter of solution.
[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]
Solution A : 0.5 moles : 2 L solution = 0.25 M
Solution B : 1 moles : 3 L solution = 0.33 M
Solution C : 1.5 moles : 4 L solution = 0.375 M
PLS HELPPP
why is CH3OH more polar than CH3CH2OH
Answer:
Explanation:
Polarity is about differencens in electronegativity. CH bonds have around the same electronegativity value so a CH bond is nonpolar. The more CH bonds there are in a molecule, the more nonpolar it is. Since CH3CH2OH has more carbon-hydrogen bonds than CH3OH, it is more nonpolar. With the same reasoning, since CH3OH has less CH bonds, it's more polar.
How many moles of oxygen are in 2.00 moles of NaCIO4?
Answer: 8 Moles of Oxygen
Explanation: The formula shows that there are (exactly) 4 oxygen atoms in each mole or formula unit. Therefore 4 * 2.00 = 8.
what are the characteristics of temperature
A Temperature is a unit used to represent hotness or coolness on any of a number of scales, including Fahrenheit and Celsius. The direction that heat energy will spontaneously flow depends on temperature. It measures the average kinetic energy of the substances also.
The average kinetic energy of the particles in an object is measured by its temperature. The velocity of these particles likewise increases as the temperature rises. A thermometer or a calorimeter is used to determine the temperature.
Our weather is made up of several various elements, including temperature, cloudiness, wind speed, and the quantity and type of moisture in the air.
Thus temperature determines the weather and kinetic energy.
To know more about temperature, visit;
https://brainly.com/question/23411503
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What do scientists think is responsible for this dramatic change in height? Cite evidence from the text to support your answer.
Answer:
Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 11,700 years ago marking the beginning of the modern climate era — and of human civilization. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.
Explanation:
i might be right
Learning Task 2: Fill in the blanks. Write your answers
A sample of oxygen is collected in a 175 mL container over water at 15°C, and the barometer reads 752.0 torr.
What volume would the dry gas occupy at 770.0 torr and 15°C? (Water vapor pressure at 15°C is 12.8 torr.)
The volume of dry gas = 168 L
Further explanationGiven
175 ml container at 15°C
P total = 752 torr
water vapour = 12.8 torr
Required
The volume of dry gas
Solution
Dalton's law of partial pressure :
P tot = P₁ + P₂ + P₃ ....
P total = P O2 + P water
P O2 = 752 - 12.8
P O2 = 739.2 torr
Boyle's Law
At a fixed temperature, the gas volume is inversely proportional to the pressure applied
P₁V₁ = P₂V₂
739.2 175 = 770 .V₂
V₂ = 168 L
How many moles are 3.21x10^28 moles of N2
Answer:
number of moles =
[tex]53.3 \times 10 {}^{3} mol[/tex]
Explanation:
here's the solution in attachment.
2 points
Which group of elements loses electrons most easily?
8 (8A)
1(1A)
7 (7A)
2 (2A)
Answer:
7 (7A)
Explanation:
Which has the largest ionization energy, platinum or nickel?
What is the Sl unit for energy? Be sure to give the full name for the unit
Answer:
Joules
Explanation:
ANSWER FAST
Ozone (O3) is made of three atoms of oxygen. It is _____.
a mixture
an ion
a molecule
an element
Does the following compound contain a polyatomic ion? CuCl2 *
Yes
No
Answer:
the answer is no
Explanation:
I don't no
Please help me I don’t understand
You add a neutron to the nucleus of the atom. How many protons, neutrons, and electrons do you have now
number of protons, neutrons, and electrons for an atom of any element. Atoms are made of protons, neutrons, and electrons. Protons carry a positive electrical change, while electrons are negatively charged, and neutrons are neutral.
Hope I helped :)
A water molecule is held together by ___ covalent bonds,
meaning there are a total of __shared electrons in the
molecule.
2 covalent bonds
2 pairs or 4 electrons
Is NO ionic or covalent
Mechanical energy is the total amount of and energy in a system. science
Answer:
Hey do you know if "horsleyjaydyn" is a girl you commented once she was a guy so
Explanation:
If 42.68 ml of 0.43 M KOH is used to neutralize 18.40 ml of H, SO4, calculate
the concentration of the sulfuric acid solution.
Write the net ionic equation of this reaction
The concentration of the sulfuric acid : 0.499 M
The net ionic equation
2 OH ⁻(aq]+ 2 H ⁺ (aq] → 2 H ₂O (l]
Further explanationGiven
42.68 ml of 0.43 M KOH
18.40 ml of H2SO4
Required
the concentration of the sulfuric acid
the net ionic equation
Solution
Acid-base titration formula
Ma. Va. na = Mb. Vb. nb
Ma, Mb = acid base concentration
Va, Vb = acid base volume
na, nb = acid base valence
Input the value :
a=KOH, b= H2SO4
0.43 x 42.68 x 1 = Mb x 18.40 x 2
Mb = 0.499 M
The net ionic equation
Reaction
2KOH + H2SO4 → K2SO4 + 2H2O
2 K ⁺ (aq]+ 2 OH ⁻ (aq] + 2 H ⁺ (aq] + SO ₄²⁻(aq] → 2 K ⁺ (aq] + SO ₄²⁻(aq] + 2 H ₂ O (l]
canceled the spectator ions :
2 OH ⁻(aq]+ 2 H ⁺ (aq] → 2 H ₂O (l]
What temperature in Kelvin is 52 degree C?
Answer:
325.15
Explanation:
℃ = K - 273.15
52+273.15=K
K= 325.15
Rank the following compounds from weakest intermolecular forces to strongest. Justify your answers.
H2S I2 N2 H2O
Answer:
N2-non polar<i2< H2s-polar<H2o-polar
Explanation:
An ideal gas does not exist.
Answer:
an ideal gas does not exist except as a conceptual notion, an ideal. Physicists and chemists idealized the behaviour of real gases so that they could explain these phenomena. Under conditions of low pressure and high temperature, all gases behave like real gases, even gases such as UF6 .
Answer:
True
Explanation:
The two chromosomes that have genes for the same trait in the same order are known as
Answer:
Homologous chromosome
What are the states of matter and why are they relevant to you?
What is needed to release the energy in a bond?
High temperatures
An electro-magnetic force
A fast moving electron
More energy
14. The chemical reaction shows the
production of sulfur trioxide.
2502 (9)+ O2 (g) 2503 (9)
Which of the following reactant
quantities would make oxygen gas
the limiting reagent?
Answer:
Explanation:
Production of sulfur trioxide is O2 CO2
Describe how innate behaviors and learned behaviors differ? If you tell me the answer i will give you a brainliest answer :)
Answer:
The difference between an innate behavior and a learned one is that innate behaviors are those an animal will engage in from birth without any intervention. Learned behavior is something an animal discovers through trial, error and observation.
Explanation:
Help thanks thanks thanks
Answer:
the answer is (G)
Explanation:
It is G!
Your welcome!
what does 'potable water' mean?
Answer:
Potable water, also known as drinking water, comes from surface and ground sources and is treated to levels that that meet state and federal standards for consumption.
