Answer:
An increase
Explanation:
The strong southerly winds affect the vapor pressure by increasing it .
When the vapor pressure increases it means an increase in temperature and more evaporation occurs.
A decrease in the vapor pressure means a reduction in temperature with less amount of evaporation being involved
5.05 g
Express your answer as an integer.
Answer:5.5
Explanation:
Lesson Question: How can you determine the specific heat of a
metal using a calorimeter?
To do this computation for each of the four metals, you needed
several measurements.
v of the metal and the water
- First, you measured the
inside the calorimeter.
the metal and added it to water in the
. Then, you
calorimeter.
12.459
- After heat transferred from the metal to the water, you measured
the
of both materials.
DONE
Intro
No
Answer:
the person above me is correct
Explanation:
Two separate pure samples of carbon dioxide were analyzed. Both samples were found to contain 27.29% carbon by mass. Justify these findings on the basis of atomic molecular theory.
Answer:
Atoms of the same element are exactly alike in all respects and are different from atoms of other elements.
Explanation:
One of the postulates of the Dalton's atomic theory is that 'Atoms of the same element are exactly alike in all respects and are different from atoms of other elements.'
Hence, if carbon dioxide from two sources are obtained and analysed, the mass percentage of carbon in both samples should be exactly the same since they both contain atoms of carbon. The atoms of carbon in the both samples are exactly the same in all respects in accordance with the Dalton's atomic theory, hence the observation.
how are pure carbon, oxygen and hydrogen different from the compound ethanol which contains all three of those elements?
Learn more:
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Answer:
Explanation:
https://brainly.com/question/19235553
Explain why or why not it’s necessary for the scientific process to always follow the same route
Answer:
Explanation:
The scientific method describes the processes by which scientists gain knowledge about the world. It's characterized by six key elements: questions, hypotheses, experiments, observations, analyses, and conclusions. These elements are interrelated steps, so they don't always function in the same order.
Calculate the molar solubility of CaF2 in a 0.25 m solution of NaF(aq).
(Ksp (CaF2) = 4.0 x 10-11)
Answer:
6.4 × 10^-10 M
Explanation:
The molar solubility of the ions in a compound can be calculated from the Ksp (solubility constant).
CaF2 will dissociate as follows:
CaF2 ⇌Ca2+ + 2F-
1 mole of Calcium ion (x)
2 moles of fluorine ion (2x)
NaF will also dissociate as follows:
NaF ⇌ Na+ + F-
Where Na+ = 0.25M
F- = 0.25M
The total concentration of fluoride ion in the solution is (2x + 0.25M), however, due to common ion effect i.e. 2x<0.25, 2x can be neglected. This means that concentration of fluoride ion will be 0.25M
Ksp = {Ca2+}{F-}^2
Ksp = {x}{0.25}^2
4.0 × 10^-11 = 0.25^2 × x
4.0 × 10^-11 = 0.0625x
x = 4.0 × 10^-11 ÷ 6.25 × 10^-2
x = 4/6.25 × 10^ (-11+2)
x = 0.64 × 10^-9
x = 6.4 × 10^-10
Therefore, the molar solubility of CaF2 in NaF solution is 6.4 × 10^-10M
The molar solubility should be 6.4 × 10^-10 M
Calculation of the molar solubility:Here
CaF2 will dissociate should be
CaF2 ⇌Ca2+ + 2F-
where,
1 mole of Calcium ion (x)
2 moles of fluorine ion (2x)
Now
NaF will also dissociate like
NaF ⇌ Na+ + F-
Here
Na+ = 0.25M
F- = 0.25M
Now
Ksp = {Ca2+}{F-}^2
Ksp = {x}{0.25}^2
4.0 × 10^-11 = 0.25^2 × x
4.0 × 10^-11 = 0.0625x
x = 4.0 × 10^-11 ÷ 6.25 × 10^-2
x = 4/6.25 × 10^ (-11+2)
x = 0.64 × 10^-9
x = 6.4 × 10^-10
Therefore, the molar solubility of CaF2 in NaF solution is 6.4 × 10^-10M
Learn more about solution here: https://brainly.com/question/14619461
(3.605 X 10^-27) + (4.01 X 10^-25)
Answer in scientific notation
Find and fix each mistake in the following equilibrium constant expressions.
Part A
2H2S(g)?2H2(g)+S2(g)
Keq=[H2][S2][H2S]
a. Keq=[H2S]^2/[H2]2[S2]
b. Keq=[H2S]/[H2][S2]
c. Keq=[H2]^2[S2]/[H2S]^2
Part B
CO(g)+Cl2(g)?COCl2(g)
Keq=[CO][Cl2][COCl2]
a. Keq=[CO][Cl2]^2/[COCl2]^2
b. Keq=[COCl2]/[CO][Cl2]
c. Keq=[COCl2]^2/[CO][Cl2]^2
Answer:
A. c. Keq=[H2]^2[S2]/[H2S]^2
B. b. Keq=[COCl2]/[CO][Cl2]
Explanation:
Hello,
In this case, considering the law of mass action which states that the equilibrium expression is written in terms of the concentration of products divided by the concentration of reactants considering the stoichiometric coefficients as powers we obtain:
A. For the reaction:
[tex]2H_2S(g)\rightleftharpoons 2H_2(g)+S_2(g)[/tex]
The equilibrium expression is:
[tex]Keq=\frac{[H_2]^2[S_2]}{[H_2S]^2}[/tex]
Therefore, answer is c. Keq=[H2]^2[S2]/[H2S]^2.
B. For the reaction:
[tex]CO(g)+Cl_2(g)\rightleftharpoons COCl_2(g)[/tex]
The equilibrium expression is:
[tex]Keq=\frac{[COCl_2]}{[CO][Cl_2]}[/tex]
Therefore, answer is b. Keq=[COCl2]/[CO][Cl2].
Regards.
A sample of water is measured with a 2 mL volumetric pipet. What volume
measurement should be recorded with the correct number of decimal places?
Answer:
Explanation:
A pipette is used to measure an exact volume of liquid; a pipette can only measure it's exact recommended volume (it can't measure more or less).
Hence, a 2-mL volumetric pipette can only measure 2 ml and would be recorded as 2.00 (ml). This is because simple volumes are usually recorded in two decimal places.
what would happen if the leopard attacked any one zebra or wildebeest.
Answer:
Lepord would win.
Explanation:
The Wildbeast is just another goat/sheep so its like a lepord fighting one of them so the Lepord would win.
Multiply 17.243 × 0.95 = _____
Answer:16.38085
Explanation:Aline the decimals then start multiplying.
Weak noncovalent interactions:__________ a. do not include ionic interactions b. always involve water. c. can have a large cumulative effect d. combine to form covalent interactions
Answer:
c. can have a large cumulative effect
Explanation:
Noncovalent interactions between molecules are weaker than covalent interactions. Noncovalent interactions between molecules are of various types which include van der Waals forces, hydrogen bonding, and electrostatic interactions or ionic bonding.
van der Waals forces are weak interactions found in all molecules. They include dipole-dipole interactions - formed due to the differences in the electronegativity of atoms - and the London dispersion forces.
Hydrogen Bonds results when electrons are shared between hydrogen and a strongly electronegative atoms like fluorine, nitrogen, oxygen. The hydrogen acquires a partial positive charge while the electronegative atom acquires a partial negative. This results in attraction between hydrogen and neighboring electronegative molecules.
Ionic bonds result due to the attraction between groups with opposite electrical charges, for example in common salt between sodium and chloride ions.
Even though these noncovalent interactions are weak, cumulatively, they exert strong effect. For example, the high boiling point of water and the crystal structure of ice are due to hydrogen bonding.
which are made matters
Answer:
Everything you can hold, taste, or smell is made of matter. Matter makes up everything you can see, including clothes, water, food, plants, and animals. It even makes up some things you cannot see, such as air or the smell of perfume.
Which of the following describes the formation of an ionic bond
Explanation:
loosing or gaining one or more electrons
why do oxygen and hydrogen can be kept underwater
A compound is found to contain 46.68 % nitrogen and 53.32 % oxygen by mass. To answer the question, enter the elements in the order presented above. QUESTION 1: The empirical formula for this compound is . QUESTION 2: The molar mass for this compound is 30.01 g/mol. The molecular formula for this compound is
Answer:
Q1: NO
Q2: NO
Explanation:
Step 1: Given data
Percentage by mass of nitrogen: 46.68%
Percentage by mass of oxygen: 53.32%
Step 2: Divide each percentage by the mass of the element
N: 46.68/14.01 = 3.332
O: 53.32/16.00 = 3.332
Step 3: Divide both numbers by the smallest one (in this case is the same)
N: 3.332/3.332 = 1
O: 3.332/3.332 = 1
The empirical formula is NO. Its molar mass is 30.01 g/mol.
Step 4: Calculate "n"
n = molar mass of the molecular formula / molar mass of the empirical formula
n = (30.01 g/mol) / (30.01 g/mol) = 1
Step 5: Determine the molecular formula
We do so by multiplying the empirical formula by "n".
NO × 1 = NO
Liquids that do not mix can be separated by which technique
A) Filtration
B) Distillation
C) Decantation
D) Evaporation
1) How many moles of atoms are in 3.00 g of 13C?2) Based on your answer in Part B, how many electrons are in this amount of 13C?3) Based on your answer in Part B, how many neutrons are in this amount of 13C?
Answer:
1) 1.39 * 10²³ atoms
2) 8.43 * 10²³ electrons
3) 9.73 * 10²³ neutrons
Explanation:
1) 13 g of C-13 contains 6.02 *10²³ atoms
3.00 g of C-13 will contain 6.02 * 10²³ * (3/13) = 1.39 * 10²³ atoms
2) Each atom of C-13 contains 6 electrons
Therefore 3.00 g of C-13 will contain 6 * 1.39 * 10²³ electrons = 8.43 * 10²³ electrons
3) Each atom of C-13 contains 7 neutrons
Therefore, 3.00 g of C-13 will contain 7 * 1.39 * 10²³ neutrons = 9.73 * 10²³ neutrons
Calculate the [OH-] and the pH for a solution of 0.24M methylamine, CH3NH2. Kb = 3.7 X 10-4.
Answer:
[tex][OH^-]=9.24x10^{-3}M[/tex].
[tex]pH=11.97[/tex].
Explanation:
Hello,
In this case, since the ionization of methylamine is:
[tex]CH_3NH_2(aq)+H_2O(l)\rightleftharpoons CH_3NH_3^+(aq)+OH^-(aq)[/tex]
The equilibrium expression is:
[tex]Kb=\frac{[CH_3NH_3^+][OH^-]}{[CH_3NH_2]}[/tex]
And in terms of the reaction extent [tex]x[/tex] which is equal to the concentration of OH⁻ as well as that of CH₃NH₃⁺ via ice procedure we can write:
[tex]3.7x10^{-4}=\frac{x*x}{024-x}[/tex]
Whose solution for [tex]x[/tex] via quadratic equation is 9.24x10⁻³ M since the other solution is negative so it is avoided. Therefore, the concentration of OH⁻ is:
[tex][OH^-]=x=9.24x10^{-3}M[/tex]
With which we can compute the pOH at first:
[tex]pOH=-log([OH^-])=-log(9.24x10^{-3})=2.034[/tex]
Then, since pH and pOH are related via:
[tex]pH+pOH=14[/tex]
The pH turns out:
[tex]pH=14-pOH=14-2.034\\\\pH=11.97[/tex]
Best regards.
Glassblower creating sculptures out of glass physical or chemical
Answer:
phsical
Explanation:
it is a phisical cuz your only changing the shape not the chemical structure
can anyone please help with this!!
Answer:
2341, last option is the correct choice.
Explanation:
Boiling points of the given compounds are given as:
[tex]CH_4=-161.5\:C^{\circ}\\\\C_4H_{10}=-1\:C^{\circ}\\\\CH_2Cl_2=39.6\:C^{\circ}\\\\H_2O=100\:C^{\circ}[/tex]
Best Regards!
Write the net ionic equation for the reaction that takes places between aqueous copper and nitrate.
Answer:
Cu+HNO3
Explanation:
How much grams are in 4.78 cup
Answer:
1130.89
Explanation:
Answer:
963.648
Explanat:::::::)))))))
Determine the partial negative charge on the bromine atom in a c−br bond. the bond length is 1.93 å and the bond dipole moment is 1.40 d . express your answer using 3 significant figures. the partial negative charge on the bromine atom = previous answersrequest answer incorrect; try again; 4 attempts remaining provide feedback.
Answer:
The value is [tex]x = 0.151 \ e [/tex]
Explanation:
From the question we are told that
The bond length is [tex]l = 1.93\ \r a = 1.93 *1 *10^{-10} =1.93 *10^{-10}\ m [/tex]
The bond dipole moment is [tex] \mu = 1.40 d = 1.40 * 3.33564 *10^{-30} = 4.6699 *10^{-30} \ C \cdot m[/tex]
Generally the dipole moment is mathematically represented as
[tex]\mu = Q * l[/tex]
Here Q is the partial negative charge on the bromine atom
So
[tex]Q = \frac{\mu}{ l}[/tex]
=> [tex]Q = \frac{4.6699 *10^{-30}}{ 1.93 *10^{-10} }[/tex]
=> [tex]Q = 2.42 *10^{-20} C [/tex]
Generally
1 electronic charge(e) is equivalent to [tex]1.60*10^{-19} C[/tex]
So x electronic charge(e) is equivalent to [tex]Q = 2.42 *10^{-20} C [/tex]
=> [tex]x = \frac{2.42 *10^{-20}}{1.60*10^{-19} }[/tex]
=> [tex]x = 0.151 \ e [/tex]
Which is more dense? A foam ball or a bowling ball?
Please help! Only answer if you know the answer 100%
What technique would you use to separate the Drierite from the silicon? *
Answer:
Filtration
Explanation:
Filtration is a separation technique used in the laboratories to separate two elements or compounds by using a filter paper and a beaker.
Drierite is also know as calcium sulphate and silicon is made up of silica.
The filtration equipment are taken to separate these two components. The separation method is used in the second beaker by pouring the mixture through a filtering funnel and using a filter paper. The solid remaining of silicon remains on the filter paper separating the two.
What is the potential energy of the ball when it gets to its maximum height just before falling back to the ground?J
Answer:
9.8 joules
Explanation:
due to acceleration due to gravity
Methanol, a potential replacement for gasoline as an automotive fuel, can be made from H2 and CO by the reaction
CO(g) + 2H2(g) CH3OH(g)
At 500.0 K, this reaction has Kp = 6.25 x 10-3. Calculate ?
Answer:
[tex]\Delta G=-48.2kJ/mol[/tex]
Explanation:
Hello,
In this case, considering that the relationship between Kp and K is:
[tex]K=\frac{Kp}{RT^{\Delta \nu}}[/tex]
Whereas the change in the number of moles (stoichiometric coefficients) is:
[tex]\Delta \nu=1-2-1=-2[/tex]
The equilibrium constant is:
[tex]K=\frac{6.25x10^{-3}}{(8.314\frac{J}{mol\times K}*500.0K)^{-2}}\\\\K=1.08x10^{5}[/tex]
In such a way, the Gibbs free energy of reaction is:
[tex]\Delta G=-RTln(K)=-8.314\frac{J}{mol\times K}*500.0K*ln(1.08x10^5)\\\\\Delta G=-48.2kJ/mol[/tex]
Regards.
What is the period number in which helium is found
Answer:
Helium is the second element on the periodic table. It is located in period 1 and group 18 or 8A on the righthand side of the table. This group contains the noble gases, which are the most chemically inert elements on the periodic table. Each He atom has two protons and usually two neutrons and two electrons.
Explanation:
thoughtco.com
Answer:
period 1 and group 18 or 8A on the righthand side of the table.
Explanation:
You have a 16 g sample of ethanol with a density of 0.7893 g/mL. What volume of ethanol do you have?
Answer:
Density is mass/volume d=m/v so volume = m/d or mass divided by density.
That would be 23 / 0.7893 = 29.1397 or 29.14 mL. Grams cancels out
Explanation:
The volume of ethanol is 20.27 g/ml.
What is volume?The area occupied by a three-dimensional object is its volume. It can be determined using density and mass. Liters are used to measure it. The overall weight of a thing is its mass. M designates it.
The mass per unit volume is known as density. The capital letter D and the symbol rho stand for density. You can figure it out by dividing the mass by the volume.
rho = m / V
rho = density
m = mass
V = volume
Given the mass of the sample of ethanol weighs 16 g
The density of 0.7893 g/mL
Putting the values in the equation
Volume = 16 / 0.7893 = 20.27
Thus, the volume of ethanol is 20.27 g/ml.
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