If you hear a weather report say that a low pressure system is coming in, what kind of weather can you expect?
A
wind
B
polluted air
C
precipitation
D
heat
How many moles of SO3 are in 2.4 *10^23 cules?
Answer:
0.4 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{2.4 {10}^{23} }{6.02 \times {10}^{23} } = \frac{2.4}{6.02} \\ = 0.3986...[/tex]
We have the final answer as
0.4 molesHope this helps you
What type of erosion and deposition is not a major force in Texas
The individuality of an organism is
determined by the organism's
A) amino acids
B) DNA nucleotide sequence
C) nitrogenous bases
D) transfer RNA molecules
What is the connection between iozination energy, electronegativity, and electron affinity of elements
Answer:
Explanation:
The three of them increase from left to right across the periods of the periodic table, and at the same time, they decrease from up to down across the groups of the periodic table.
Ionization Energy is defined as the energy required to remove the atom of an electron.
Electron affinity is defined as the change in energy when electron is added to a negative ion.
Electronegativity is the ability of an atom to attract other atoms to itself.
Which forward reaction shows an increase in entropy (disorder)?explain
A.H2(g) + CuO (s) --> H2O(l) + Cu(s)
B.HCl(g) + NH3(g) --> NH4Cl(s)
C.CaCO3(s) -> CaO(s) + CO2g)
D.H2O(g) + O2(g) --> 2H2O)
Explanation:
Entropy also increases when solid reactants form liquid products. Entropy increases when a substance is broken up into multiple parts. The process of dissolving increases entropy because the solute particles become separated from one another when a solution is formed. Entropy increases as temperature increases. S = entropy
k_{b} = Boltzmann constant
\ln = natural logarithm
\Omega = number of microscopic configurations
Select the correct answer.
A compound has an empirical formula of C2H5. What is true about this empirical formula?
ОА It models the structure of the compound.
ОВ. It shows the ratio of elements in the compound.
Ос. . It gives the mass of each atom in the compound.
OD. It indicates the number of atoms in the compound.
O E. It describes only this one compound.
Answer: OB
Explanation:
The empirical formula of an element is the simplest formula of an element which shows the ratios of atoms of the each element present in a molecule of a compound .
Awnser all of them if you can its really EASY im feelin generous today 30 pts
Answer: 1. Synthetic Substance or Synthetic compound 2. Oil 3. Biofuels 4. Salt and Sugar 5. medicine 6. Synthetic 7. Background Knowledge and Visualizing
Explanation: Hope this helps! Good luck!
Answer:
1= synthetic substance
2= natural gas
3= alcohol
4=artificial musks
5= medicine
6= synthetic
7=Questioning the Text
Explanation: If my answers are correct please mark me as a brainlist.
What is the number of moles of Sodium Chloride (NaCl) that is present in 29.22g sample of it?
Answer:
[tex]\boxed {\boxed {\sf 0.5000 \ mol \ NaCl}}[/tex]
Explanation:
We are asked to convert grams to moles. We must use the molar mass or the grams in 1 mole of a substance. These values are found on the Periodic Table as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu).
We are given the compound sodium chloride or NaCl. Look up the molar masses of the individual elements.
Na: 22.9897693 g/mol Cl: 35.45 g/molThe formula for the compound does not contain any subscripts, so there is 1 mole of each element in 1 mole of the compound. Add the molar masses together to find sodium chloride's molar mass.
NaCl: 22.9897693 + 35.45= 58.4397693 g/molNow we can use the molar mass to create a ratio. We know there are 58.4397693 grams of NaCl in 1 mole of NaCl.
[tex]\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]
Multiply by the number of grams provided in the problem: 29.22
[tex]29.22 \ g\ NaCl*\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]
Flip the ratio so the units of grams of NaCl cancel.
[tex]29.22 \ g\ NaCl*\frac { 1 \ mol \ NaCl}{58.4397693 \ g \ NaCl}[/tex]
[tex]29.22*\frac { 1 \ mol \ NaCl}{58.4397693}[/tex]
[tex]\frac {29.22}{58.4397693} \ mol \ NaCl[/tex]
[tex]0.5000019738 \ mol \ NaCl[/tex]
The original measurement of grams has 4 significant figures, so our answer must have the same. For our answer, that is the ten-thousandth place. The 0 to the right of this place (0.5000019738) tells us to leave the 0 in the ten-thousandth place.
[tex]0.5000 \ mol \ NaCl[/tex]
There are approximately 0.5000 moles of sodium chloride in a 29.22 gram sample of sodium chloride.
what are the 5 similarities between acid and alkalis
Explanation:
Acids and alkalis both contain ions. Acids contain lots of hydrogen ions, which have the symbol H+. Alkalis contain lots of hydroxide ions, symbol OH-. Water is neutral because the number of hydrogen ions is equal to the number of hydroxide ions
Answer:
cids and bases both react with water and a lot of acids and bases are soluble in nature. Both acids and bases are electrolytes which means that they're good conductors of electricity. Acids and bases both produce ions in water solution. Acids release hydrogen ions (H+) whereas Bases release hydroxide ions (OH–).
Explanation:
2.91 moles of aluminum are how many grams(with work)
What can we do to protect our oceans ?
Hydrogen gas reacts with oxygen gas to form water. At STP, how many liters of hydrogen gas react with 32.4 liter of oxygen gas? (H2 + O2 -> H2O)
Answer:
I think its 1.2L? i may be wrong
Explanation:
Recall old Avogadro's hypothesis...........
Equal volumes of gases contain AN EQUAL NUMBER of PARTICLES
And thus if there are
2.4
⋅
L
of dihydrogen, stoichiometric equivalence requires
1.2
⋅
L
of dioxygen. How many litres of water g
What volume would be occupied by 16.0 g of CH4 at 00C and 760 mmHg?
Answer:
22.4 L
Explanation:
We'll begin by calculating the number of mole in 16.0 g of CH₄. This can be obtained as follow:
Molar mass of CH₄ = 12 + (4×1)
= 12 + 4
= 16 g/mol
Mass of CH₄ = 16 g
Mole of CH₄ =?
Mole = mass / molar mass
Mole of CH₄ = 16 / 16
Mole of CH₄ = 1 mole
Finally, we shall determine the volume of the gas. This can be obtained as follow:
Number of mole of CH₄ (n) = 1 mole
Pressure (P) = 760 mmHg = 1 atm
Temperature (T) = 0°C = 273 K
Gas constant (R) = 0.0821 atm.L/Kmol
Volume (V)?
PV = nRT
1 × V = 1 × 0.0821 × 273
V = 22.4 L
Therefore, the volume of the gas is 22.4 L
bacterial cells.
Which label belongs in the area marked animal?
nucleus
DNA
cell wall
ribosomes
Answer:
I believe it would be (nucleus)
Calculate the potential energy of a block of mass of mass 0.3kg and at a height 2.6m above the ground.(take acceleration due to gravity:10m/s)
Explanation:
Mass (m)=0.3 kg
height(h)=2.6 m
acceleration due to gravity (g)=10m/s^2
Potential energy= MGH
=0.3×10×2.6
7.8 J
Give brainliest if u can
Answer the following questions using the chemical equation below:
6CO2 + 6H2O => C6H12O6 + 6O2
3. How many total atoms are on the product side?
4. How many molecules of water are on the reactant side?
What causes the "heat island" effect?
a. heat produced from a large number of people
b. the materials used in building cities retain heat
c. the large amount of reflected light from glass windows
d. all of the above
Please select the best answer from the choices provided
A
B
C
D
When two atoms form a molecule, the molecule has lower energy than the two separate atoms. However, when only two atoms are present, they bounce off each other and do not form a molecule. Explain what happens to the energy of the atoms when there are only two atoms and they collide.
DONT GIVE ME A LINK!!
Answer:
they end up bouncing against each other instead of merging together
Explanation:
What type of molecule is shown below?
H H
| |
H-C-C-0-H
|
Η Η
A. Ether
B. Aldehyde
C. Ketone
D. Alcohol
The type of molecule which is shown in the given question is alcohol, due to presence of hydroxyl group.
What are functional groups?Funcional groups are those specific groups which after attaching to any compound changes the property of that compound and then that compound will known by the propeties of that functional group.
Given molecule has the molecular structure CH₃-CH₂-OH, means in this molecule hydroxyl group is present which defines the general properties of alcohol.
Hence given molecule is an alcohol.
To know more about functional groups, visit the below link:
https://brainly.com/question/493841
What is the best explanation for the fact that Styrofoam will not dissolve in water, but Styrofoam will dissolve in acetone?
1.styrofoam is polar and water is nonpolar
2.styrofoam is nonpolar and water is polar
3.Styrofoam is polar and water is polar
4.styrofoam is nonpolar and water is nonpolar
____N2 + ____H2 ____NH3
Answer:
N2 + 3H2 + 2NH3
Explanation:
I'm assuming you're balancing the chemical equation
[tex]nitrogen \: reacts \: with \: hydrogen.[/tex]
N2 + 3H2 → 2NH3.
Explanation:-
L.H.S.
N = 2, H = 3×2 = 6.
R.H.S.
N = 2, H = 3×2 = 6.
Name the sub atomic particles in part Z of a boron atom give the relative charges of these sub atomic particles
Answer:
Neutrons and protons
Explanation:
There are three fundamental subatomic particles, these are;neutrons protons and electrons.
Ernest Rutherford successfully showed that every atom does possess a central core that contain positively charged particles (protons) called the nucleus. Chadwick later discovered the existence of neutrons.
Both protons and neutrons are found in the nucleus. Z represents the nucleus of the boron atom and houses the neutrons and protons of the boron atom.
The Lewis diagram for AlF3 is:
:F:
The electron-pair geometry around the Al atom in AlF3 is
There is/are
lone pair(s) around the central atom, so the geometry of AlF3 is
Submit Answer
Retry Entire Group
9 more group attempts remaining
Answer:
25,000 pairs
Explanation:
write in the chart which molecule is the acid,base, conjugate base,conjugate acid from the equation and watching the H+ movement
1 H2CO3 + H2O--- H3O+ +HCO3-
2 H3PO4 + H2O--- H2PO- +H3O+
3. HCO3- + H2O---H2CO3 +OH-
4 HNO3 +H2O---NO3- +H3O+
Answer:
When H2O acts as a base, it gains one H, which forms its conjugate acid, H30. ... Write the formula for the conjugate base for each of the following acids: a. ... H3PO4(aq) + H2O(l) 7 H2PO4 (aq) + H3O+(aq) ... CO32-(aq) + H2O(1) 2 HCO3 (aq) + OH(aq) ... balanced equation for the reaction of the ammonium ion with water.
grade 8 chem/ science
Answer:
reactants
Explanation:
have a good day!
Can magic 8 ball wash with water?
How much energy is required to raise the temperature of a 300.0
gram block of lead from 22.3°C to 59.9°C? The specific heat of lead is
0.129 J/gºC.
Answer:
Q = 1455.12 Joules.
Explanation:
Given the following data;
Mass = 300 grams
Initial temperature = 22.3
Final temperature = 59.9°C
Specific heat capacity = 0.129 J/gºC.
To find the quantity of energy;
[tex] Q = mcdt[/tex]
Where,
Q represents the heat capacity.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
dt represents the change in temperature.
dt = T2 - T1
dt = 59.9 - 22.3
dt = 37.6°C
Substituting the values into the equation, we have;
[tex] Q = 300*0.129*37.6 [/tex]
Q = 1455.12 Joules.
(reporting links) giving brainly
Which of the following are indicators of a healthy water source?
A.high nitrates, high pH, and low temperatures
B.low temperature, high dissolved oxygen, and neutral pH
C.low pH, high nitrates, and low dissolved oxygen
D.high turbidity, high dissolved oxygen, and high temperature
Answer:
B.
Explanation:
B. low temperature, high dissolved oxygen, and neutral pH
Hope this Helps.
atoms of which of elements will form covalent bonds in a compound
A. C and O
B. Na and F
C. Co and Fe
D. Li and Al