Answer:
A
Explanation:
The sun is larger than the planets in our solar system and has far more mass and gravity than the planets.
A mystery compound is a liquid with a boiling point of 50°C. is it likely to be in Ionic compound .why or why not?
Answer:
No, because it is low, which is characteristic of covalent compounds.
Explanation:
Hello there!
In this case, for the analysis of this liquid whose boiling point is 50 °C, it is necessary for us to keep in mind that ionic compounds have high boiling points whereas covalent compounds tend to have lower boiling points. This is due to the fact that ionic compounds have stronger intermolecular forces, so more thermal energy is required for the reaction; and covalent compounds are more weakly held together so their boiling points tend to be relatively low.
In such a way, since 50 °C is a relatively low boiling point, in comparison to waters that is about 100°C and it is polar covalent, we infer this compound is not likely to be an ionic compound but a covalent compound.
Regards!
TRUE OR FALSE?
The reason for forming multiple bonds is an interaction of end to end type between unhybridized p orbitals.
20 points!
Answer:
I think its false
Explanation:
What do you already know about the role of water within your body?
Answer:
it helps us with our blood (Little)
convert 32 degrees celsius to kelvin
Answer:
305.15
Explanation:
32 celsius converted to kelvin is 305.15 kelvin
Formula
32°C + 273.15 = 305.15K
What common compounds are in selenium? Where are these compounds found and what are they used for? What properties do they have?
Please answer AS SOON AS POSSIBLE!!! Thanks!!!!!
Answer:
tanaka..........................
Which statement describes the law of conservation of energy?
A. All systems will exchange matter and energy with their surroundings.
B. All systems can exchange energy, but not matter, with their surroundings.
C. Energy cannot be created nor destroyed, but it changes from one form to another.
D. Energy is destroyed in most chemical reactions when new products are formed.
Answer:
Energy cannot be created nor destroyed, but it changes from one form to another.
Explanation: got it
Determina cuantos moles hay en 2.31g de NaCl
Answer:
0.0395 mol NaCl
Explanation:
¡Hola!
En este caso, es necesario para nosotros considerar que las relaciones masa-mol se desarrollan teniendo en cuenta las masas molares de los compuestos involucrados en el sistema. Ahora, dado que este sistema se compone de NaCl, cloruro de sodio como sal de mesa, es posible saber que la masa molar de este es alrededor de 58.44 g/mol.
De esta manera, las moles en 2.31 g se calculan como sigue:
[tex]=2.31gNaCl*\frac{1molNaCl}{58.44gNaCl}\\\\=0.0395molNaCl[/tex]
¡Saludos!
In the covalent compound CH3, the Greek prefix used to represent the anion is Answer here
Answer:
Tri.
Explanation:
''Tri'' is the Greek prefix used to represent the CH3 because there are three hydrogen atoms to form the covalent compound so in Greek method ''Tri'' is used for three. In Greek system, there are certain names for prefixes such as ''di'' is used for two, ''tri'' is used for three, ''tetra'' is used for four etc. This method only provides information about the number of atoms that form the covalent compound.
How many moles of gas are in a 25 L container if the temperature is 289 K and the pressure is 125 atm?
Answer:
1.3 moles
Explanation:
pv = nrt
n = pv/rt
n = (125 * 25) / (8.3144598 * 289)
n = 1.3 moles
Given the following information: SO2(g) + 12 O2(g) = SO3(g) Kp = 2.5E-2 What is the Kp value for the following reaction: 2 SO2(g) + O2(g) = 2 SO3(g)
Answer:
K = 6.25x10⁻⁴
Explanation:
Based on the reaction:
SO₂ + 1/2 O₂ ⇄ SO₃ Kp = 2.5x10⁻²
We can find the Kp of a similar reaction using Hess's law where the sum of 2 reactions a and b produce a K that is:
K = Ka*Kb
The sum of twice the reaction of the problem:
SO₂ + 1/2 O₂ ⇄ SO₃
+ SO₂ + 1/2 O₂ ⇄ SO₃
2SO₂ + O₂ ⇄ 2SO₃
Where K must be:
K = Kp*Kp = Kp²
K = (2.5x10⁻²)²
K = 6.25x10⁻⁴Is cardboard a solid
Answer:
yes because it has a fixed shape and volume
hope this helps
have a good day :)
Explanation:
pls help my teacher said i have 10 min only
Answer:
is a phenomenon of discotoration of sea surface
caused by algae
causes skin irritation and eye blindness
its not safe to swim
12. Convert 1.98 grams of PbSo, to molecules.
No links please
Answer:
3.93 × 10²¹ molecules
Explanation:
Convert 1.98 grams of PbSO₄ to molecules.
Step 1: Given data
Mass of PbSO₄: 1.98 g
Step 2: Calculate the number of moles corresponding to 1.98 g of PbSO₄
The molar mass of PbSO₄ is 303.26 g/mol.
1.98 g × 1 mol/303.26 g = 6.53 × 10⁻³ mol
Step 3: Calculate the number of molecules in 6.53 × 10⁻³ moles of PbSO₄
To convert moles to molecules, we need a conversion factor: Avogadro's number. There are 6.02 × 10²³ molecules of PbSO₄ in 1 mole of molecules of PbSO₄.
6.53 × 10⁻³ mol × 6.02 × 10²³ molecules/1 mol = 3.93 × 10²¹ molecules
calculate the wavelength of yellow light with the energy of 3.45x10-19 J
Answer: The wavelength of yellow light with the energy of [tex]3.45 \times 10^{-19} J[/tex] is [tex]5.76 \times 10^{-7} m[/tex].
Explanation:
Given: Energy = [tex]3.45 \times 10^{-19} J[/tex]
Formula used to calculate the wavelength is as follows.
[tex]E = \frac{hc}{\lambda}[/tex]
where,
E = energy
h = Planck's constant = [tex]6.63 \times 10^{-34} Js[/tex]
c = speed of light = [tex]3 \times 10^{8} m/s[/tex]
[tex]\lambda[/tex] = wavelength
Substitute the values into above formula as follows.
[tex]E = \frac{hc}{\lambda}\\3.45 \times 10^{-19} J = \frac{6.63 \times 10^{-34} Js \times 3 \times 10^{8} m/s}{\lambda}\\\lambda = 5.76 \times 10^{-7} m[/tex]
Thus, we can conclude that the wavelength of yellow light with the energy of [tex]3.45 \times 10^{-19} J[/tex] is [tex]5.76 \times 10^{-7} m[/tex].
Please hurry!!! And help!!
*URGENT*
Best answer gets marked Brainliest!
The table below shows several minerals found in earths crust based on the information in the table which mineral is also an element
A) Calcite
B) quartz
C) hematite
D) graphite
Answer:
Graphite, because it has atoms of same atomic and electrovalent electrons
answer this correctly, only sincere answers please. I really need help. I will do all I can to make someone answer this. Thanks! ASAP
Explain the relationship between pH, POH, hydronium concentration and hydroxide concentration and be prepared to complete the chart below based on the provided knowns.
Complete the chart below based on the provided knowns.
H+ ______x_______
OH - 1 x 10^-11______
pH 3_____________
POH _____y_______
Answer:
See Explanation
Explanation:
Let us recall that;
[H^+] [OH^-] = 1 * 10^-14
Where;
[OH^-] = 1 x 10^-11
Then;
[H^+] = 1 * 10^-14/1 x 10^-11
[H^+] = 1 * 10^-3
pH = -log [H^+]
pH = -log(1 * 10^-3)
pH = 3
Also;
pH + pOH = 14
pOH = 14 - pH
pOH = 14 -3
pOH = 11
elect the best choice, and briefly indicate the reason for your choice: a. Lowest ionization energy: K Rb Cs b. Most favorable electron affinity: Cl Br I c. Most energy required to remove an electron: Cu Cu Cu2
Answer:
Lowest ionization energy: Cs
Most favorable electron affinity: Cl
Most energy required to remove an electron: Cu2+
Explanation:
Ionization energy decreases down the group. That means that as we move down the group, the ionization energy of elements decreases due to greater distance of the outermost electron from the nucleus and greater screening effect of inner electrons on this outermost electron. Hence Cs has the lowest ionization energy.
Electron affinity of halogens decreases down the group. Hence, Cl possess the most favorable electron affinity.
When an electron has been removed from an atom, the removal of the next electron is usually harder. Thus, the second ionization energy is always greater than the first ionization energy and so on. Thus, it is most difficult to remove an electron from Cu^2+ from which two electrons have already been removed.
2+5*6
how to get over someone
me and him were together for 10 months
30 points ASAP Which are limiting nutrients for plant growth?
water and nitrogen
nitrogen and carbon
carbon and phosphorus
phosphorus and nitrogen
I think its phosphorus and nitrogen
TRUE OR FALSE 3D printing waste less material than traditional manufacturing.
O True
O False
Pls help Is technology
Write the balanced half equation of iron 2 and permanganate in a solution of acid. Show all of your work.
Answer:
5Fe⁺² + MnO₄⁻ + 8H⁺ => 5Fe⁺³ + Mn⁺² + 4H₂O
Explanation:
Fe⁺² + MnO₄⁻ + H⁺ => Mn⁺² + Fe⁺³ + H₂O
5(Fe⁺² => Fe⁺³ + 1e⁻) => 5Fe⁺² => 5Fe⁺³ + 5e⁻
MnO₄⁻ + 5e⁻ => Mn⁺² => MnO₄⁻ + 8H⁺ + 5e⁻ => Mn⁺² + 4H₂O
=> 5Fe⁺² + MnO₄⁻ + 8H⁺ => 5Fe⁺³ + Mn⁺² + 4H₂O
The half-cell is a chamber in the voltaic cell where one half-cell is the site of the oxidation reaction and the other half-cell is the site of the reduction reaction.
a. True
b. False
Answer:
True
Explanation:
In a cell reaction, half cell reaction is oxidation. Oxidation means addition of electrons. This addition of electrons takes place at cathode. Therefore, cathode is site of oxidation. However, the other half cell reaction is reduction. In reduction reaction removal of electrons takes place. Reduction takes place at anode of the cell.
Therefore, the given statement is true.
Yo wassup with these links every time I ask a question there’s a link everywhere it’s making me mad this needs to stop
What happens when a solid turns straight into gas and skips the liquid stage?
Answer:
Explanation:
Liquid to solid phase transitions are known as "freezing.". Solid to liquid phase transitions are known as "melting.". Solid to gas phase transitions are known as "sublimation.". In most cases, solids turn into gases only after an intermediate liquid state.
Why do different parts of the world have such different animals?
Answer:
a
Explanation:
Using general trends, predict the stability of the following nuclei.
a. silicon-28
b. arsenic-82
c. radium-228
d. zinc-64
e. potassium-40
Answer:
stable nuclei are silicon-28, zinc-64 , potassium-40
while unstable one are arsenic-82 , radium-228
Explanation:
There is rule to predict stability of a nuclei that is
Z <= 20 N/Z = 1 most stable
Z = 20-40 N/Z = 1.25 stable
Z = 40-80 N/Z = 1.80 less stable
Z >= 83, nucleus becomes unstable or radioactive
Here, N/Z = no. of neutrons/ No. of protons
1. silicon-28 , N/Z =14/14 = 1 stable
2. arsenic-82, N/Z = 49/33 = 1.48 (unstable)
3. Potassium-40 , N/Z = 21/19 = 1.10(stable)
4. zinc-64, N/Z =34/30 = 1.13 (stable)
5. radium-228 (unstable, radioactive)
Therefore, stable nuclei are silicon-28, zinc-64 , potassium-40
while unstable one are arsenic-82 , radium-228
The reaction of an organic compound, like a hydrocarbon, as it burns in the presence of oxygen is called
Answer: combustion
Explanation: When a compound burns in the presence of oxygen the reaction is called a combustion. Like most organic substances, hydrocarbons are combustible. The general reaction is given below. Organic Compound + O 2 (g) ! CO 2 (g) + H 2 O(g) + Heat=Energy (1)
The solubility of copper chloride at 20 °C is 73 g/100 g of water. Kiera adds 100 g of copper chloride to 100 g of water and stirs. What mass of copper chloride remains undissolved? Include units
Answer:
[tex]m_{undissolved}=27g[/tex]
Explanation:
Hello there!
In this case, according to the given information of the solubility of copper chloride, as the maximum amount of this salt one can dissolve without having a precipitate, we infer that since just 73 grams are actually dissolved, the following amount will remain solid as a precipitate:
[tex]m_{undissolved}=100g-73g\\\\m_{undissolved}=27g[/tex]
Best regards!
A chemist has a small amount of compound that has the boiling point 65°c that must be fractionally distilled. Yet, the chemist doesn't want to lose any of the compound to hold up on the column. What the chemist should do?
Answer:
A "chaser," a high-boiling compound whose vapors will displace the vapors of the desired low-boiling compound, can be used to distill a small amount of compound.
A smaller fractionation apparatus or a Vigreux column could be used instead.
Explanation:
Which reaction type is the following: AgF + CaCl2 --> AgCl + CaF2
Explanation:
[tex]{\small{\underline{\bf{\red{answer...}}}}} \\ \\ [/tex]
[tex]\small\mathfrak\purple{Double \: displacement \: reaction} \\ \\ \small\mathfrak\orange{hope \: it \: helps...}[/tex]