Answer:
The answer is Na2CO3.Option a
Which is not a property of a gas? * exert pressure high density High compressibility readily soluble
Explanation:
A gas is state of matter in which there is large intermolecular distance and hence, a weaker molecular force of attraction in comparison to solids and liquids. therefore, it impart certain properties to gases which are uncommon in solids and liquids
Properties of a gas includes:
Exert pressure on the container
Highly compressible
Low density
and readily soluble in other mediums
Hence, high density is not a property of a gas.
1. the moderns periodic table, elements are ordered
a. according to decreasing atomic mass
b. according to mendeleev's original design
c. according to increasing atomic number
Answer:
In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom In a periodic table arranged in order of increasing
Write a nuclear equation for each description below.
Stronitum-84 combines with an alpha particle, creating sodium-25 and a daughter nucleus. 4 pts
Answer:
Sr-84 + He-2 -> Na-25 + Pm-61
Explanation:
2. How will the equilibrium shift if the following changes are made? State if the reaction will shift
to the left or right and explain why it will shift in that direction.
PCl5 () + heat ⇌ PCl3 () + Cl2 ()
a. Temperature is increased
b. pressure is increased
Cl2 is added
d. PCl3 is removed as it is formed
3. How will the equilibrium shift if the following changes are made? State if the reaction will shift
to the left or right and explain why it will shift in that direction. (10 points each. 5 points for
correct answer, 5 points for correct explanation)
H2 () + Cl2 () ⇌ 2HCl() + heat
a. Heat is removed
b.Cl2 is added
d. PCl3 is removed as it is formed
3. How will the equilibrium shift if the following changes are made? State if the reaction will shift
to the left or right and explain why it will shift in that direction.
H2 () + Cl2 () ⇌ 2HCl() + heat
a. Heat is removed
b.HCl is added
c. H2 is added
d. Pressure is decreased
Use the reaction below to answer the following questions.
2NO2 ()⇌N2O4 ()
a. What is the expression for the equilibrium constant, Keq, for the reaction?
b. If there are 0.400 moles of N2O4 and 0.500 moles of NO2 in a 1.00 L flask at equilibrium at 20°C, what is the Keq?
Please give me brainleist. :)
Answer:
2a. If the temperature is increased, the reaction will shift to the right in an attempt to release some of the heat. As the forward reaction loses heat while the reverse would create more heat.
2b. If the pressure is increased, it would shift to the left to counteract the increase in pressure as the left side will have fewer molecules.
2c. If Cl2 is added the reaction will shift to the left in order to remove the stress of the extra Cl2 and favor the production of more reactant.
2d. If PCl3 is removed, the reaction will shift to the right. When part of the equation is removed the reaction learns to adapt to the loss by trying to make more Pcl3 and counteract the effects of losing the PCl3.
3a. The reaction will shift to the right to produce more heat and counter the negative effects of losing the heat.
3b. It will shift to the left to get rid of the excess HCl being produced and form more reactant from the breakdown of the HCl.
3c. It would shift to the right in order to get rid of the excess form products from it.
3d. If pressure is decreased there will be no effect on the shift of the reaction because there is an even amount of moles of gas on each side.
4a. K=[N2O4(g0] / [NO2(g)]2
4b. (Below)
K=[N2O4(g)] / [NO2(g)]2
0.4 / 0.5(2)
0.4/0.25 = 1.6
Keq= 1.6
Name three uses for mercury.
USES OF MERCURY
used in thermometer as it is liquid at room temperature.It is used in batteries , florescent lightit is also used in dental fillingi. Write the dissolution reaction of BaF2, including all states. (0.5 points)
BaF2←>Ba2+(aq)+2F-(aq)
ii. Write the expression for Ksp for BaF2. (0.5 points)
iii. Write the Ksp expression as an algebraic equation, using the variable x to represent concentrations. (1 point)
iv. Find the solubility of BaF2 by solving the equation you wrote in part iii. (0.5 points)
Answer:
See Explanation
Explanation:
i) The equation of the dissolution of BF2 is;
BaF2(s)⇄Ba2+(aq)+2F-(aq)
ii) Ksp =[Ba2+] [2F-]^2
iii) Let the concentration/solubility of [Ba2+] and [2F-] be x
Ksp = [x] [2x]^2
Ksp = 4x^3
iv) x =∛Ksp/4
type of ions do acids give off? hydroniumm hydrogen heliumhy dronium and hydrogen
Answer:
Substances that give H + 1 ion when dissolved in water are called acids
Explanation:
PLEASE HELPPPPPPPP
Why do organic materials decompose so slowly inside of a landfill? List 3 factorsthat are required for biodegradation
Answer:
3 factors that are required for biodegradation are
a) Appropriate moisture
b) Oxygen supply
c) Stable condition
Explanation:
For biodegradation in a landfill, following conditions are essential –
a) Appropriate moisture
b) Oxygen supply
c) Stable condition
Contrast to above three conditions, the waste in landfill is kept dry, devoid of oxygen supply, and stirred continuously due to which the organic matter mummify instead of decomposing.
When an object is acted on by unbalanced forces, the object will -
Answer:
hope it helps and thank you for the points
Mg + Cu2+ —> Mg2+ + Cu
a) why is this a redox reaction?
b) identify the oxidizing agent. Give reason for your answer
answer any of them you want please
Explanation:
Since the oxidation state of Mg is changed to +2 from 0, it is oxidized. (as it is increased)
Similarly, oxidation state of Cu is changed to 0 from +2, it is reduced. (as it is decreased)
Since oxidation & reduction occur at the same time, it is redox reaction.
As Mg is being oxidized, other one must be the oxidizing agent.
Cu is the oxidizing agent
All changes in phase (solid-liquid-gas) are
Answer:
States of matter
Explanation:
Three states of matter
label the parts of the wave
Calculate the pH of the solutions with the following [OH-].
Which statement describes how echolocation and ultrasound imaging are the same? They both use the absorption of sound waves. They both use the diffraction of sound waves. They both use the reflection of sound waves. They both use the transmission of sound waves.
Answer:
C.) They both use the reflection of sound waves.
Explanation:
Right on Edge
Answer:
C.) They both use the reflection of sound waves.
Explanation:
stay safe 2021
how many valence electrons does C6H14O6 have?
chhfjhfhou huohfpgvvocoj ognf
What is the speed of a bird that flies 25 meters in 25 minutes?
Answer:
1mpm(1 meters per minute) Explanation: Speed:Distance/time 25/25=1 plz mark as brainliest
Answer:
1mpm(1 meters per minute)
Please help me with this
Answer:
no se
ablar inglés losiento princesa
por que todo me sale en inglés?
Explicación?:
What body system changes the food we eat into energy?
Answer:
We need food to fuel our bodies for energy, growth and repair. The digestive system converts the foods we eat into their simplest forms, like glucose (sugars), amino acids (that make up protein) or fatty acids (that make up fats).Explanation:
hopes its right
Can someone help me please?!!!!!
Answer: C, B, D (not sure about this one sorry) and C
Explanation:
What is the scientific method? *
a. A series of steps used by scientists to investigate an hypothesis
b. A series of steps used to determine which chemicals are good for use
c. A series of steps used to tell how life began on earth
d. A series of steps used to by scientists to find about technology
Which of the following describes a solution equilibrium? *
Solution equilibrium is the physical state in which the opposing processes of dissolution and crystallization of a solute occur at equal rates.
Which organelles appear to be associated with the nucleus of the animal cell
Answer:
The nucleus is surrounded by the endoplasmic reticulum, which is covered in spots by ribosomes.
Explanation:
When the animal cell divides, the nucleus breaks up, and the nuclear envelope falls apart.
Perform the following operation
and express the answer in
scientific notation.
3.60x10-12 + 3.60x10-11
Answer:
3.60X10^-12 is equal to 0.360X10^-11 (move decimal one place left)
Now you can add 3.60X10^-11 and 0.360X10^-11:
3.60X10^-11 + 0.360X10^-11 = 3.96X10^-11
You're really just adding 3.60 to 0.36 since the "X10^-11" is the same for both.
1. This balanced equation represents a chemical reaction.
2C4H10+ 1302
8CO2 + 10H2O
What type of chemical reaction is represented by the equation?
A. Double replacement
B. Combustion
C. Single replacement
D. Synthesis (combination)
Answer:
combustion is the answer
What is needed for our cells to get energy from our food?
Answer:
cellular respiration is needed for our cells to get energy from our food.
Explanation:
Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.
3 points
5. Which of the following is true regarding the atoms involved in a
chemical reaction? *
a) During a chemical reaction, atoms will always be combined into much larger
molecules.
b) Some of the atoms will always be changed into a different type of atom by a
chemical reaction.
c) Some of the atoms present before the reaction will always be lost during a
chemical reaction.
d) The same number of each type of atom will always be present before and after a
chemical reaction takes place.
Why aren’t dominant genes ALWAYS more common?
Answer:
selective breeding
Explanation:
Example: pretend that rabbits can only be brown or black and black is dominant. If only the brown rabbits reproduce it will eventually be more common Hope this helps
I NEED HELP ! ANYTHING WILL HELP!
Why are there few fossils
of sea slugs?
Why are you more likely to find a fossilized trilobite than a fossilized sea urchin?
How do you explain the ability of nonmetals to attract electrons to themselves?
Answer:
When these chemical bonds form, atoms of some elements have a greater ability to attract the valence electrons involved in the bond than other elements. Electronegativity is a measure of the ability of an atom to attract the electrons when the atom is part of a compound. Electronegativity differs from electron affinity because electron affinity
HOPE IT HELPS
Explanation:
Answer:
it is electronegativity and it increases as you move up and to the right on the periodic table and nonmetals are situated to the top right of the periodic table
Explanation:
What is the molar mass of a sample of gas that has a density of 2.85g/L at 101kPa pressure
and 29°C? Name the law that is used to solve this problem.
Answer:71.25
Explanation:
The molar mass of a sample of gas that has a density of 2.85g/L at 101 kPa pressure and 29°C is 71.37 g mol⁻¹ and It can be solved using Ideal gas law.
What is Ideal gas law ?The ideal gas law is an equation of state that describes ideal gases.
This equation of state relates a gas’s pressure, volume, temperature, and mass, and is very useful for describing how gases will behave in ideal conditions.
This is the most common equation of state for gases.
Ideal Gas equation ;
PV = nRT
Molar mass (Mm) = m /n
Where ;
m = given massn = number of moleswe also know,
Density (D) = m / v
Where ;
m = massv = volumeNow, Putting the formula of Molar mass and Density in ideal gas equation we get ;
Molar mass = D RT/ P
Given ;
Density = 2.85 g/LPressure = 101kpa (= 0.99 atm)Temperature = 29°C (= 302.15 K)(Gas constant) R = 0.0821Putting all the values in the above equation of molar mass ;
Molar mass = 2.85 x 0.0821 x 302 / 0.99
= 71.37 g mol⁻¹
Learn more about Ideal gas law here ;
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