Answer:
Its true
Explanation:
Hope it helps, have a great day!!!
KBr(aq) + NaCl(aq) =
PLZZZ HELP CHEMISTRY QUESTION DOWN BELOW IMAGE SHOWWN BELOW
Answer:
Id say the third one
Explanation: chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time, so that there is no observable change in the properties of the system.
thats the only one that is close to definition
t-Butyl alcohol (TBA) is an important octane enhancer that is used to replace lead additives in gasoline.
a. True
b. False
Answer:
True
Explanation:
The correct option is - True
Organelles that use energy from sunlight to produce food are called mitochondria
O True
O False
Answer:
Organelles that use energy from sunlight to produce food are called mitochondria.
False
Which of these things would you expect to have cells with both mitochondria
and chloroplasts?
A. Squirrel
B. Shark
C. Hummingbird
D. Grass
Answer:
D. Grass
Explanation:
Every living organism must contain one or more cells to be considered "living". Each cell, however, contains certain structures that perform specific roles called ORGANELLES. These organelles are of different types and hence, perform different tasks. For example, mitochondria is the power house of a cell i.e. site of energy production, and hence, is found in every eukaryotic cell.
On the other hand, chloroplast is an organelle designed to perform photosynthesis, which only occurs in plant cells. Since only plant cells can undergo photosynthesis, only plant cells can contain chloroplast. Hence, according to this question, GRASS as a type of plant is an organism that will contain both mitochondria and chloroplast in its cells.
How many moles of O2 are dissolved n 10.0 L of a 0.001 mol dm-3 solution?
Answer:
[tex]0.01molO_2[/tex]
Explanation:
Hello there!
In this case, by considering the definition of molar solution as the moles of solute over volume in liters or cubic meters of solution, we can see that actually 10.0 L of the solution are equal to 10.0 dm³. In such a way, since the concentration is 0.001 mol / dm³, the moles of oxygen that are dissolved turn out to be:
[tex]0.001mol/dm^3 * 10.0dm^3\\\\0.01molO_2[/tex]
Best regards!
Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water . Suppose 1.5 g of hydrochloric acid is mixed with 2.67 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to significant digits.
Answer: The maximum amount of water that can be produced is 0.74 g
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] .....(1)
Putting values in equation 1, we get:
[tex]\text{Moles of hydrochloric acid:}=\frac{1.5g}{36.5g/mol}=0.041mol[/tex]
[tex]\text{Moles of sodium hydroxide}=\frac{2.67g}{40g/mol}=0.067mol[/tex]
The chemical equation for the reaction is
[tex]HCl+NaOH\rightarrow NaCl+H_2O[/tex]
By Stoichiometry of the reaction:
1 mole of HCl reacts with 1 mole of NaOH
So, 0.041 moles of HCl will react with = [tex]\frac{1}{1}\times 0.041=0.041mol[/tex] of NaOH
As, given amount of NaOH is more than the required amount. So, it is considered as an excess reagent. Thus, HCl is considered as a limiting reagent because it limits the formation of product.
By Stoichiometry of the reaction:
1 mole of HCl produces = 1 mole of water
So, 0.041 moles of HCl will produce = [tex]\frac{1}{1}\times 0.041=0.041moles[/tex] of water
Mass of water=[tex]moles\times {\text{Molar Mass}}=0.041mol\times 18g/mol=0.74g[/tex]
Thus the maximum amount of water that can be produced is 0.74 g
There are three types
of atoms, which on gains and looses electrons?
Answer:
https://courses.lumenlearning.com/boundless-biology/chapter/atoms-isotopes-ions-and-molecules/
Explanation:
Encountering problems during separation/purification is a very common issue in organic synthesis, but these steps are crucial to isolate your desired product.
a. True
b. False
The gas phase decomposition of hydrogen peroxide at 400 °C
H2O2(g)H2O(g) + ½ O2(g)
is second order in H2O2 with a rate constant of 0.650 M-1 s-1.
If the initial concentration of H2O2 is 8.00×10-2 M, the concentration of H2O2 will be 1.70×10-2 M after
seconds have passed.
Answer:
t = 71.3 s
Explanation:
Hello there!
In this case, since the second-order integrated law is given by the following equation:
[tex]\frac{1}{[H_2O_2]} =\frac{1}{[H_2O_2]_0}+kt[/tex]
Thus, given the initial and final concentration of hydrogen peroxide and the rate constant, we obtain the following time:
[tex]\frac{1}{[0.0170M]}-\frac{1}{0.0800M}=0.650M^{-1}s^{-1}t\\\\t=\frac{46.32M^{-1}}{0.650M^{-1}s^{-1}} \\\\t=71.3s[/tex]
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Need ASAP please help :)
1.2 What type of bonding occurs when hydrogen form a diatomic molecule?
Answer:
I think it is covalent bonding...
Explanation:
The bonding is covalent in homonuclear diatomic molecules. Each atom in the molecule has the same electronegativity, which means electrons are shared equally between the two. The electronegativity of the atoms in heteronuclear diatomic molecules varies, and these molecules have polar covalent bonds. A dipole is formed when a molecule interacts with another molecule. (i think it's covalent bonding but i might be wrong)
hope this helps...
c. Write P on the line if the given object possesses potential energy and Krit
possesses kinetic energy.
1. Bouncing ball
2. Swinging chimes
3. Toys on the floor
4. Drinking glass on a table
5. Rotating blades of an electric fan
6. Moving car
7. Skater standing still
8. A running athlete
9. Planets orbits in its axis
10. lamp
Answer:
1 K
2 P
3 P
4 P
5 K
6 K
7 K
8 P
9P
10 K
Rock formations are sculpted into shape by two general forces. What are these?
a.photosynthesis and volcanism
b.weathering and erosion
c.volcanism and weathering
d.uplift and rainfall
Answer:weathering and erosion
Please mark brainlyest
Explanation:
Answer:
b.weathering and erosion
Explanation:
Weathering and erosion shape rock formations.
How many grams of K2Cr2O7 can be dissolved at 279 grams of water at 90°C?
Answer:
How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC? Solubility Curve DRAFT. 10th - 12th grade. 3326 times. Chemistry. 63% average accuracy. 3 years ago ... When 20 grams of potassium chlorate, KClO 3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as: answer choices . supersaturated. saturated.
Explanation:
Can somebody help me please!!
Answer: velocity
Explanation: trust me man
make a chart to show the effect of Sodium Hydroxide and Sulphuric acid on methyl orange and red litmus paper
Answer:
mark me as brainliest plsss
Hence in the Sodium hydroxide, methyl orange will turn into yellow color and in Sulfuric acid shows red color. Red litmus will turn into blue color in the Sodium hydroxide solution.
What is litmus paper?Litmus paper is a paper which is used to identify the acidity or basicity of any solution.
Sulfuric acid is acidic in nature, and red litmus paper shows no effect in this acid as red paper change into blue in the presence of base. Methyl orange is an indicator and it shows red color in the acidic medium.Sodium hydroxide is basic in nature and red litmus paper will change into blue in this solution and color of methyl orange changes from red to yellow in the basic solution.Hence, the effect of red litmus & methyl orange is explained above.
To know more about litmus paper, visit the below link:
https://brainly.com/question/1287856
1
is the amount of space
that matter in an object occupies.
a sample of gas has a volume of 100.0L at 135C assuming the pressure remains constant
Answer: 84.56 L is the answer.
Explanation:
Answer:
84.6
Explanation:
I took the test
Question 33 of 45
The concentration of the hydronium ion in an aqueous solution at 25
°C is 0.0056 M. What is the concentration of the hydroxide ion?
Answer:
[OH-] = 1.8 x 10^-12 M
Explanation:
[H3O+][OH-] = Kw
Kw = 1.0 x 10^-14
[OH-] = 1.0 x 10^-14 / 0.0056 = 1.8 x 10^-12 M
how is the temporory hardness of water remove bye boiling mathod
Answer:
The temporary hardness of water can be removed by boiling. The bicarbonates get converted to insoluble carbonates and settle down at the bottom.
Calcium bicarbonate -------> Calcium carbonate [insoluble] + Water + Carbon dioxide.
Ca[HCO3]2 -----> Ca CO3 + H2O + CO2
Which of the following is the furthest away from Earth?
The closest star
One of Jupiter's moons
A large asteroid in the asteroid belt
Uranus
Answer:
The closest star is the answer.
different between intermolecular and intra molecular dehydration
Why is NH3 not considered a base under the Arrhenius definition of acids and bases?
SELECT AN ANSWER
a. It does not react with acids.
b. NH3(aq) does not contain OH- ions.
c. NH3 is considered a base under the Arrhenius definition, but not under the Bronsted-Lowry definition.
d. It does not cause a color change when mixed with an acid-base (pH) indicator.
Answer:
b. NH3(aq) does not contain OH- ions.
Explanation:
According to Arrhenius in his definition, a base is a substance that has the ability to increase the hydroxyll ion (OH-) of an aqueous solution. In other words, Arrhenius bases dissociates into OH- when dissolved in water.
According to this question, ammonia (NH3) will not be considered an Arrhenius base because it does not contain OH-. This means that ammonia (NH3) cannot dissociate into hydroxyll ion when dissolved in water.
how many electrons do nonmetals atoms tend to gain when forming ions
A chemist fills a reaction vessel with 0.247 M lead(II) (Pb2+) aqueous solution, 0.758 M bromide (Br-) aqueous solution, and 0.109 g lead (II) bromide (PbBr2) solid at a temperature of 20.0 oC. Under these conditions, calculate the reaction free energy deltaG for the following chemical reaction:
Pb2+(aq) + 2Br-(aq) <----> PbBr2(s)
Answer:
ΔG = -24.7kJ/mol
Explanation:
ΔG° of
Pb2+(aq) + 2Br-(aq) ⇄ PbBr2(s)
is:
ΔG° PbBr2 - (2*ΔG°Br- + ΔG°Pb2+)
-261.9kJ/mol - (2*-104.0kJ/mol + -24.4kJ/mol) =
-29.5kJ/mol
ΔG of the reaction is:
ΔG = ΔG° + RT lnQ
Where R is gas constant (8.314x10⁻³kJ/molK)
T is absolute temperature (20°C + 273.15 = 293.15K)
Q is reaction quotient = 1 / [Pb²⁺][Br⁻]²
Replacing:
ΔG = -29.5kJ/mol + 8.314x10⁻³kJ/molK*293.15K ln(1 / [Pb²⁺][Br⁻]²)
ΔG = -29.5kJ/mol + 8.314x10⁻³kJ/molK*293.15K ln(1 / [0.247M][0.758M]²)
ΔG = -24.7kJ/mol
trinitrogen nonochloride formula?
Answer:
NCI3
Explanation:
The 3 should written below.
if it helps don't forget to like and mark me
Answer:
trinitrogen nonochloride formula is NCI3
6.An ice cube that has a mass of 20 g is in a sealed container. As the container is heated, the ice first melts, but eventually it changes to water vapor.
A)The temperature at which the ice melts is ____________________.
B) Compare the motion of the particles in each state
Answer:
See explanation
Explanation:
a) Every substance melts at a particular temperature known as the melting point of the substance. The melting point of ice is 0°C. Hence ice melts at 0°C.
b) There are three states of matter; solid liquid and gas. The particles of matter in each stage of matter possess varying degrees of freedom.
In the solid state, the intermolecular forces between the particles of water that compose ice are very strong. Hence the particles do not translate, they only vibrate or rotate about their mean positions.
In the liquid state, the magnitude of intermolecular interaction is less than that of the solids hence the molecules can translate but not with a high kinetic energy.
In the gaseous state, there is a minimum intermolecular interaction between particles theoretically hence the particles are really free to move about with a very high kinetic energy.
Which one of the following statements concerning the length of carbon-carbon single, double, and triple covalent bonds is true?
A. The carbon-carbon single bond is shorter than either the carbon-carbon double or triple bond.
B. The carbon-carbon double bond is shorter than either the carbon-carbon single or triple bond.
C. The carbon-carbon triple bond is shorter than either the carbon-carbon single or double bond.
D. The carbon-carbon single, double, and triple bonds all have the same length.
Answer:
[tex]\color{Blue}\huge\boxed{Question} [/tex]
Which one of the following statements concerning the length of carbon-carbon single, double, and triple covalent bonds is true?[tex]\color{Blue}\huge\boxed{Answer} [/tex]
D. The carbon-carbon single, double, and triple bonds all have the same length.The statement concerning the length of carbon-carbon single, double, and triple covalent bonds which is true is: D. The carbon-carbon single, double, and triple bonds all have the same length.
A chemical bond can be defined as the forces of attraction between ions, crystals, atoms or molecules which are typically responsible for the formation of chemical compounds. Thus, a chemical bond is a force that holds atom together and binds crystals, ions or molecules together, so as to form a chemical compound.
Generally, there are three (3) main types of chemical bonds and these includes:
Hydrogen bonds.Ionic bonds.Covalent bonds.A covalent bond can be defined as a type of bond that typically involves the sharing of electrons between the atoms of a chemical element. The type of bond formed between two or more carbon atoms is a covalent bond. Hence, carbon atoms can either form a single, double, or triple covalent bonds with the same length.
In conclusion, the length of carbon-carbon single, double, and triple covalent bonds are all the same.
Read more: https://brainly.com/question/24212500
Do you think baking a cake is or is not a chemical reaction
Answer:
yes
Explanation:
its an endothermic chemical reaction
Answer:
It is a chemical reaction because you cannot get back the original ingredients. if you can get the original ingredients back, it would be a physical change.
Hope this helped you out!!