Answer:
Durban, South AfricaExplanation:
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15.0 g of potassium chlorate is melted so that it will then decompose. What mass of oxygen is produced assuming all of the original potassium chlorates fully decomposes?
Answer:
5.875 g of Oxygen
Explanation:
We must first balance our decomposition equation KClO3 -> K + ClO3
The amount of oxygen in CLO3 is 3 times the original. We begin by converting 15g of KClO3 to moles. 15 / (39.1 + 35.45 + 3(16) ) = 0.122 mols.
Then we go to moles of oxygen,
.122 * 3 = 0.367 mols of Oxygen
Then to grams of Oxygen
.367 * 16 = 5.875 g
86.30 mL of an HCl solution was required to neutralize 31.75 mL of 0.150 M NaOH. Determine the molarity of the HCI.
Answer:
0.055M
Explanation:
Using the formula as follows:
CaVa = CbVb
Where;
Ca = concentration of acid (M)
Cb = concentration of base (M)
Va = volume of acid (mL)
Vb = volume of base (mL)
According to the information given in this question, Ca (HCl) = ?, Cb (NaOH) = 0.150, Va (HCl) = 86.30mL, Vb (NaOH) = 31.75mL
Using CaVa = CbVb
Ca = CbVb ÷ Va
Ca = (0.150 × 31.75) ÷ 86.30
Ca = 4.7625 ÷ 86.30
Ca = 0.055M
Different relative positions of the sun, the moon, and Earth have different effects on Earth's oceans. Which model shows the positions of the sun, the moon, and Earth that have the greatest effect on ocean tides?
Answer:
b
Explanation:
Answer:
it is j.
Explanation:
1.
How does light behave when it is shined on an object?
Answer:
Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. For a smooth surface, reflected light rays travel in the same direction.
Explanation:
Read the scenario and match the symbiotic relationship.
Question 1 options:
commensalism
mutualism
parasitism
1.
Nitrogen-fixing bacteria get a place to live and food in the roots of plants while helping the plant
2.
Bromeliads are plants that live in the tall trees in the rainforest. The tree is not harmed by them.
3.
Ticks can attach to the skin of humans or other mammals. The ticks feed on the blood to grow.
Answer:
__3__parasitism-Ticks can attach to the skin of humans or other mammals. The ticks feed on the blood to grow.
__1__mutualism-Nitrogen-fixing bacteria get a place to live and food in the roots of plants while helping the plant.
__2__commensalism-Bromeliads are plants that live in the tall trees in the rainforest. The tree is not harmed by them.
Explanation:
The word that describes each statement would be mutualism, commensalism, and parasitism respectively.
What is symbiosis?It is a form of interaction involving two organisms of different species.
There are different types of symbiotic interactions:
Commensalism: one of the organisms gains from the other. The other organism neither gains nor gets hurt from the interaction.Mutualism: both interacting organisms benefit from the relationship without losing in any way.Parasitism: One organism, the parasite, benefits while the other, the host, is harmed. This often leads to the death of the host.More on symbiotic relationships can be found here:https://brainly.com/question/3350498
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6. What category of elements is found between the metals and nonmetals
on the periodic table?
A synthetic
B. metalloids
C. radioactive
D. noble gases
Answer:
B. metalloids
Explanation:
The metalloids are found between metals and non-metals on the periodic table.
Metalloids have properties between those of metals and non-metals. Under certain prevalent conditions, they exhibit a set of properties.
Synthetic substances are those artificially made, they are not found on the periodic table.
Noble gases are found in the last group on the periodic table.
Radioactive substances are found in the lanthanide and actinide series.
HELP PLEASE CHEMISTRY!!!!
Answer:
amını sike bilirim tabi verirsen
What are the environmental factors in space that need to be taken into account in the design of electronics?
Answer: Here
Explanation:
trapped and transient radiation, solar and galactic cosmic rays, which can profoundly damage spacecraft electronics are presented
Answer:
Environmental factors including trapped and transient radiation, solar and galactic cosmic rays, which can profoundly damage spacecraft electronics are presented. Some effects such as ionization and atomic displacement damages to semiconductors and single event phenomena are also briefly mentioned.
Explanation:
what are electrons. in your own words
Answer:
Electrons are the smallest of the particles that make up an atom, and they carry a negative charge.
Answer:
Electrons are the smallest subatomic particles that make up an atom. They have a mass of 1/1836 amu's or 0 amu's (no mass) Electrons are located in the electron cloud and have a negative charge.
Explanation:
Hope that helps
If you start with 6 moles of N2 and 6 moles of H2 (meaning you won't have enough of 1 of the ingredients), how many moles of NH3 would you be able to make?
Answer:
[tex]4molNH_3[/tex]
Explanation:
Hello there!
In this case, according to the given information it will be firstly necessary to set up the chemical equation taking place:
[tex]N_2+3H_3\rightarrow 2NH_3[/tex]
We infer we need to calculate the moles of NH3 by using both of the moles of N2 and H2 at the beginning, in order to identify the limiting reactant:
[tex]n_{NH_3}=6molN_2*\frac{2molNH_3}{1molN_2}=12molNH_3\\\\ n_{NH_3}=6molH_2*\frac{2molNH_3}{3molH_2}=4molNH_3\\[/tex]
Thus, since hydrogen yields the fewest moles of ammonia, we conclude that we are just able to yield 4 moles of NH3.
Regards!
The temperature of the areas surrounding Kochi before each storm was about 10°C and there was the same amount of water vapor in the air. Given this information, which storm do you predict will have the most rainfall, and why?
Answer:
Tropical storm
Explanation:
The tropical storm have the most rainfall because tropical winds will increase in strength as temperatures rise. With the increase in temperature, the tropical storms have stronger winds which leads to produce higher rainfall. There is a direct relationship between temperature and amount of rainfall. As the temperature increases, the tropical storms have stronger winds which leads to more rainfall while on the other hand, decrease in temperature decrease the strength of the tropical storm's winds that leads to lower rainfall.
The temperature given shows that the storm that will be predicted is a tropical storm.
What is temperature?It should be noted that temperature means the degree of hotness or coldness in a body.
In this case, since the temperature of the areas surrounding Kochi before each storm was about 10°C and there was the same amount of water vapor in the air, the appropriate storm is a tropical storm.
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a physical change is change
that
a, forms a substance with new composition
b, results in the formation of new properties
c, results in the formation of new substance
d, does not alther the composition of the substance
Answer:
The answer is D
Explanation:
All the other options are associated with chemical change
Answer:
D
Explanation:
when we say phisical change it is change of phisical so it does not change the composition because when we say it alther the composition it will be chemical change.
Considere un elemento "X" que posee como valencias 2, 4 y 6. En su nomenclatura tradicional, considerando la valencia cuatro, ese compuesto debería considerar la terminación:
Answer:
"ite"
Explanation:
Se sabe que los elementos del grupo 16 de la tabla prioritaria muestran estados de oxidación o valencias de 2,4 y 6 respectivamente, dependiendo del compuesto formado.
Por ejemplo, el azufre forma los siguientes compuestos;
sulfato de sodio (el azufre tiene una valencia de 6)
Sulfito de sodio (el azufre tiene una valencia de 4)
Sulfuro de sodio (el azufre tiene una valencia de 2)
Por lo tanto, en compuestos en los que exhiben una valencia de 4, la terminación común es "ite"
Answer:
ite
Explanation:
Hope this helps
If an object is not accelerating, you can be sure that
A. its speed is 0 m/s.
B. it has a mass of 0 kg.
c. the net force acting on it is O N.
Answer:
A
Explanation:
It's not moving so it would be going 0 meters per second
Answer:
I think its A
Explanation:
Which of the following is an acid-base neutralization reaction?
A) C3H8 + 5 O2 --> 3 CO2 + 4H20
B) 2 MgO + O2 --> 2 Mgo
C) Pb(NO3)2 + 2KI --> 2 KNO3 + Pblz
D) H2SO4 + 2 KOH --> K2SO4 + 2 H2O
Answer:
Explanation:
Answer: D
STRONG ACIDS:
HBr
HCl
HI
HNO3
HClO4
H2SO4
If we view a new moon tonight, how many weeks will pass before we view a full moon?
If we view a new moon tonight, 4 weeks will pass before we view a full moon. The sole natural satellite of Earth is the Moon.
What is moon?The sole natural satellite of Earth is the Moon. With a diameter that is around one-fourth that of the Earth, it's the fifth biggest satellite inside the solar system as well as the largest and also most massive when compared to its parent planet. The Moon is larger than any other dwarf planets of a Solar System and belongs to a planetary-mass body with a distinct rocky body, rendering this a satellite planet according to geophysical interpretations of the term.
There isn't much of an atmosphere, hydrosphere, and magnetic field there. With a surface gravity of 0.1654 g, it has a gravity that is around one-sixth that of Earth. Jupiter's moon Io is the only satellite inside the Solar System that is documented to have a higher gravity and density. If we view a new moon tonight, 4 weeks will pass before we view a full moon.
Therefore, if we view a new moon tonight, 4 weeks will pass before we view a full moon.
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A gas has a volume of 1.22L at 179K. Once heated, the same gas now has a volume of 6.1L at 285K and 1.34atm. What was the original pressure of the gas?
Set up the conversion chart below to find how many molecules are in 4.6 moles of ammonium nitrate (NH4NO3
)?
Answer: There are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].
Explanation:
According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of every substance.
Hence, the number of molecules present in 4.6 moles of ammonium nitrate are calculated as follows.
[tex]4.6 \times 6.022 \times 10^{23}\\= 27.701 \times 10^{23} molecules[/tex]
Thus, we can conclude that there are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].
What will the pH of 1.50 L of pure water water be if 2.0 mL of 4.0 M HCl is added? By how much has the pH changed? What will the pH of the solution in part b be if 2.0 mL of 4.0 M HCl is added? By how much has the pH changed?
Answer:
Part A
pH ≈ 2.273
Part B
ΔpH ≈ -4.726
Part C
pH ≈ 1.973
Part D
ΔpH ≈ -0.301
Explanation:
Part A
The pH of a solution is given by the negative concentration of hydrogen ions in the solution
2.0 mL = 0.002 L
The number of moles of HCl in 2.0 mL of 4.0 M HCl is given as follows;
1 Liter of 4.0 M HCl contains 4.0 moles of HCl
2.0 mL = 0.002 L 4.0 M HCl contains 0.002 L/(1 L) × 4.0 M = 0.008 moles of HCl
The concentration of 0.008 moles in 1.50 L is given as follows;
Concentration = The number of moles/(The volume in liters)
∴ The concentration of 0.008 moles in 1.50 L, C = 0.008 moles/(1.5 L + 0.002 L)
∴ The concentration of 0.008 moles in 1.50 L, C ≈ 0.00533 moles/liter = 0.00533 M HCl
Given that HCl is a strong acid, we have that HCl dissociates completely to give equal number of H⁺ and Cl⁻ ions;
The number of moles of [H⁺] in the solution = 0.00533 moles
The pH of the solution = -log[H⁺]
∴ pH = -log[5.33 × 10⁻³] ≈ 2.273
The pH of the 1.5 L of pure water will be approximately 2.273
Part B
The pH of the pure water has changed from neutral (pH = 7) tp pH = 2.273
The change in pH is ΔpH = 2.274 - 7 = -4.726
ΔpH ≈ -4.726
Part C
When 2.0 mL of the 4.0 M HCl is added, the solution above, we have;
C = (0.008 + 0.008)/(1.5 + 0.002 + 0.002) ≈ 1.06383 × 10⁻²
The concentration of the solution becomes, C ≈ 1.06383 × 10⁻² mole/liter
The pH becomes, pH = -log(1.06383 × 10⁻²) ≈ 1.973
Part D
The amount by which the pH has changed, ΔpH ≈ 1.973 - 2.274 = -0.301.
What is Permeability
i think i put it in the wrong one..
Answer:
the state or quality of a material or membrane that causes it to allow liquids or gases to pass through it.
The properties of compounds are (what?) to the elements that make it up. *
Answer:A compound is a unique substance that forms when two or more elements combine chemically. A compound always has the same elements in the same proportions. The properties of compounds may be very different from the properties of the elements that form them. Some compounds form rigid frameworks called crystals.
Explanation:
Answer:
An element or compounds’ physical properties are far easier to detect. These properties are things that can be observed without changing the identity of the element or compound. These properties include color, smell, freezing point, boiling point, melting point, opacity, viscosity, and density.
Explanation:
Need help fast! Would love if you could explain... but if not that’s ok
A molecule contains 52.20 grams of manganese and 3.80 g of carbon what is its empirical formula
MnC3
Mn3C
Answer: Mn3C is the corrects answer
Trust me :)
Calculate the molarity of an HCl solution if 25.0 mL of the solution is neutralized by 15.5 mL of 0.800 M NaOH. Below is the unbalanced equation: ______ HCl + _____ NaOH →____ H2O + _____ NaCl
Answer:
.496 M .
Explanation:
15.5 mL of .8 M NaOH will contain .0155 x .8 moles of NaOH
moles of NaOH = .0124 moles
For neutralization, moles contained by 25 mL of HCl = .0124
Hence molarity of HCl = .0124 / .025
= .496 M .
0.496 M is the molarity of an HCl solution if 25.0 mL of the solution is neutralized by 15.5 mL of 0.800 M NaOH.
What is molarity?Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.
Molarity = [tex]\frac{Moles \;solute}{Volume of solution in litre}[/tex]
15.5 mL of 0.8 M NaOH will contain 0.0155 x 0.8 moles of NaOH
Moles of NaOH = 0.0124 moles
For neutralization, moles contained by 25 mL of HCl = 0.0124
Hence molarity of HCl = [tex]\frac{0.0124}{0.025}[/tex]
= 0.496 M .
Hence, 0.496 M is the molarity of an HCl solution if 25.0 mL of the solution is neutralized by 15.5 mL of 0.800 M NaOH.
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Influences the loudness of a sound
Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) Electron loss is always associated with an increase in oxidation number. (2) An exothermic reaction occurs when the energy required to break bonds in reactants is less than the energy released by bond formation in the products. (3) The concentrations of pure liquids and pure solids are never included in an equilibrium constant expression because such concentrations never change.
Answer:
Electron loss is always associated with an increase in oxidation number- True
An exothermic reaction occurs when the energy required to break bonds in reactants is less than the energy released by bond formation in the products. True
The concentrations of pure liquids and pure solids are never included in an equilibrium constant expression because such concentrations never change. True
Explanation:
Oxidation implies loss of electrons. When a specie looses electrons, its oxidation number increases. For instance; Fe(s) -----> Fe^2+(aq) + 2e implies an increase in oxidation number of Fe from 0 to +2.
In an exothermic reaction, the energy required to break the bonds in the reactants is less than the energy released when new bonds form in the products.
We do not include the concentrations of pure liquids and pure solids in the equilibrium constant expression because the concentration of these do not change significantly throughout the reaction.
Given the balanced equation representing a reaction:
H2SO3 + H2O « H3O+ + HSO3-
According to one acid-base theory, the H2SO3 molecules act as (AKS 5g)
Answer:
An acid because they donate H^+ ions
Explanation:
Let us look at the equation again;
H2SO3 + H2O « H3O+ + HSO3-
An acid donates hydrogen ion while a base accepts hydrogen ion. Hence, we have to look at which species that acted as hydrogen ion donors or acceptors.
We can clearly see that H2SO3 acted as a hydrogen ion donor while H2O acted as a hydrogen ion acceptor.
Thus, H2SO3 acted as an acid by donating hydrogen ions.
KMnO4 ->K20 +Mno +02
In the reaction N2 + 3H2—> 2 NH3, what is the mole ratio of N2 to
NH3?
Select one:
O a. 1:1
O b. 2:3
O c. 1:3
O d. 1:2
Answer:
hey,the answer is d, 1:2
Answer: D
Explanation:
The equation shows that one mole of nitrogen reacted with three moles of hydrogen to produce two moles of ammonia.
A gas is held at 120.4 kPa and 333K. When the temperature is decreased to
275K at a constant volume, calculate the new pressure in the container.
Type your answer with the correct number of sig figs and units. *
Help please 100 points!!
Answer:
....
Explanation:
___Fe2O3 + ___C --> ___Fe + ___ C03 balanced
Answer:
Fe2O3 + C → 2Fe + CO3
Explanation:
The unbalanced equation given in this question is as follows:
Fe2O3 + C → Fe + C03
To balance this equation, one should ensure that the number of atoms of each element on both sides of the equation is equal. The balanced equation is as follows;
Fe2O3 + C → 2Fe + CO3
N.B, there are;
- 2atoms of Fe on both sides
- 1 atom of C on both sides
- 3 moles of O on both sides