Answer:
vinegar, soft drinks, seltzer water , citrus fruits
Explanation:
The total pressure of two unknown gases is 5 kPa. The partial pressure of one of the gases is 2.345 kPa, what is the partial pressure of the other gas?
Answer:
[tex]p_2=2.655kPa[/tex]
Explanation:
Hello there!
In this case, according to the Dalton's law, which states that the total pressure is equal the sum of the pressures of the gases in the mixture, we write the following for this system:
[tex]P_T=p_1+p_2[/tex]
Thus, we solve for the partial pressure of the gas #2 as shown below:
[tex]p_2=P_T-p_1\\\\p_2=5kPa-2.345kPa\\\\p_2=2.655kPa[/tex]
Best regards!
Please help!!
All fake answers get reported immediately. Yes, I am a girl -_-
Answer:
1.)C₃H₈O
2)OH
3.)1-propanol
1.) C4H8O
2.) C2H6O or CH3CH2OH
3.)Ethanol
Explanation:
Hope this help
A gas has a volume of 62.65 L at stp. At what temperture in C would the volume of the gas be 78.31 at a pressure of 612 mm hg
Answer:
1.79°C
Explanation:
Applying,
PV/T = P'V'/T'................. Equation 1
Where P = Initial presssure, V = Initial volume, T = Initial temperature, P' = Final pressure, V' = Final volume, T' = Final Temperature.
make T' the subject of the equation
T' = P'V'T/PV................ Equation 2
From the question,
Given: P = 760 mmHg (Standard pressure), T = 273 K (Standard temperature), V = 62.65 L, P' = 612 mmHg, V' = 78.31
Substitute these values into equation 2
T' = (612×78.31×273)/(760×62.65)
T' = 274.79 K
T' = (274.79-273) °C
T' = 1.79°C
if an atom has 4 protons, 5 neutrons, and 4 electrons, what would its atomic mass be?
Answer:
4
Explanation:
If I remember correctly, the atomic # will always be the same as the # of electrons
Studies show that
O the more you sit, the higher your risk for depression,
O the less you sit, the higher your risk for depression
O the more you sit, the lower your risk for depression
O none of the above
Answer:
it will be none of the above because sitting doesn't cause depression, it's the environment around that person. the body language, the way they talk... Etc.
due today please help
if the half-life of a decaying isotope is 10 years which statement is true after 10 years
A. the relative numbers of atoms cannot be determined
B. the numbers of parent nuclei and daughter nuclei in a sample are equal
C. there are more parent nuclei in a sample
D. there are more daughter nuclei than parent nuclei in a sample
Answer:
The answer: is D. there are more daughter nuclei than parent nuclei in a sample.
Hope this help you enjoy :D
Explanation:
Answer:
B
Explanation:
2
rules that apply
to both naming ionic
AND covalent
compounds
When naming ionic compounds, we follow the general rules:
Identify and name the cation; this is a metal element or polyatomic cation.
Identify and name the anion; this is a nonmetal element. Change the suffix to '-ide,' or use the polyatomic anion name.
*puts on sunglasses* (⌐■_■)
Good luck, son.
this is a attachment from my text book can you help me
Answer:
Looks like a mitrochondria
Explanation:
How many joules of heat is needed to heat 68.00 grams of aluminum foil from
55.00 °C to 93.00 °C if aluminum has a specific heat of 0.90 J/g °C?
Answer:
2,325.6
Explanation:
You use the formula
Q =mco
M =mass =68
C=0.9
O=temperature increases =93-55=38
Then multiple all this 3
Q=68*0.9*38
The number of joules of heat that is needed to heat 68.00 grams of aluminum foil is 2,325.6.
What is specific heat?The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.
By the formula of heat
Q = mct
The mass of aluminum is 68.00
the difference in temperature is 93.00 °C - 55.00 °C = 38.00
The specific heat is 0.90 J/g
Putting the values in the equation
[tex]Q = mct\\\\Q = 68.00 \times 0.90 \times 38.00 = 2325.6[/tex]
Thus, the joules of heat is 2325.6 J.
Learn more about specific heat
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How many grams of Ca(OH)2 would be needed to make 500 mL of a 0.450 mol/L solution?
113 g
133 g
41.2 g
16.68 g
Answer:
[tex]\boxed {\boxed {\sf 16.68 \ g\ Ca(OH)_2}}[/tex]
Explanation:
Molarity is a measure of concentration in moles per liter.
[tex]molarity = \frac{moles \ of \ solute}{liters \ of \ solution}[/tex]
The molarity is 0.450 moles per liter. The moles of solute is unknown.
The volume of the solution is 500 milliliters, but we want to know the liters. We need to convert the units. Remember that 1 liter contains 1000 milliliters.
[tex]\frac{ 1 \ L}{1000 \ mL}[/tex][tex]500 \ mL *\frac{ 1 \ L}{1000 \ mL}[/tex][tex]500 *\frac{ 1 \ L}{1000 }[/tex][tex]\frac{500}{1000} \ L =0.500 \ L[/tex]So, we have values for all the variables:
molarity= 0.450 mol/L moles of solute = xliters of solution =0.500 LSubstitute the values into the formula.
[tex]0.450 \ mol /L *\frac{x}{0.500 \ L}[/tex]
We want to solve for x, the moles of solute. x is being divided by 0.500 liters. The inverse of division is multiplication, so multiply both sides by 0.500 L.
[tex]0.500 \ L *0.450 \ mol /L =\frac{x}{0.500 \ L}*0.500 \ L[/tex]
[tex]0.500 \ L *0.450 \ mol /L =x[/tex]
The units of liters cancel.
[tex]0.500 *0.450 \ mol=x[/tex]
[tex]0.225 \ mol =x[/tex]
Now we have the moles and need to convert to grams. This is done using the molar mass (mass per 1 mole). The values are found on the Periodic Table as atomic masses, but the units are grams per mole instead of atomic mass units.
The solute is Ca(OH)₂, so lookup the molar masses of the individual elements.
Ca:40.08 g/mol O: 15.999 g/mol H: 1.008 g/molNote there is a subscript of around OH. There are 2 hydroxide molecules, so there are 2 oxygen and 2 hydrogen atoms. We must multiply their molar masses by 2 before adding all the values.
Ca(OH)₂= 40.08 + 2(15.999)+2(1.008)=74.094 g/molUse the molar mass as a ratio.
[tex]\frac{74.094 \ g \ Ca(OH)_2} {1 \ mol \ Ca(OH)_2}[/tex]
Multiply by the number of moles calculated.
[tex]0.225 \ mol \ Ca(OH)_2 *\frac{74.094 \ g \ Ca(OH)_2} {1 \ mol \ Ca(OH)_2}[/tex]
The units of moles of calcium hydroxide cancel.
[tex]0.225 *\frac{74.094 \ g \ Ca(OH)_2} {1}[/tex]
[tex]16.67115 \ g\ Ca(OH)_2[/tex]
16.68 grams of calcium hydroxide are needed.
Balance the equation ___C+___Fe203—-____CO2+___Fe
Answer:
3,2,3,4
Explanation:
try this answer, it's syits best to the question
When performing dimensional analysis, we usually use conversion factors. What is a conversion factor?
Answer:
A conversion factor is a variable that transforms the dimension of one variable into the terms of another variable.
Explanation:
Let be [tex]x[/tex] and [tex]y[/tex] two variables with diferent dimensions (units), [tex]r[/tex] is a conversion if transforms the dimension of one variable into the terms of the other variable. That is:
[tex]y = r\cdot x[/tex] (1)
Where:
[tex]x[/tex] - Input, [input unit]
[tex]y[/tex] - Output, [output unit]
[tex]r[/tex] - Conversion factor, [output unit] per [input unit]
can anyone tell me the answer
Answer:
A. A as concentration decreases.
Explanation:
A represents a reactant and B is a product, the concentration of the latter increases at the expense of the concentration of the former. Hence, A is the reactant of the chemical reaction as its concentration decreases.
b) The student then does the titration correctly.
He finds that 16.70 cm3 of the dilute sulfuric acid neutralises 25.0 cm3 of sodium hydroxide solution of concentration 0.200 mol/dm3
The equation for the reaction is
2NaOH + H2SO4 → Na2SO4 + 2H2O
ii) Calculate the amount, in moles, of sulfuric acid
Explanation:
mole of acid/mole of base=(concentration of acid×volume of acid)/(concentration of base×volume of base)
Na/Nb=CaVa/CbVb
1/2=(Ca×16.7)/(0.2×25)
0.2×25=2×Ca×16.7
Ca=(0.2×25)/(2×16.7)
Ca=0.15mol/dm³
mole of acid=Concentration×volume
mole of acid=0.15×(16.7/1000)
mole of acid=2.5×10^-3moles
The answer is the concentration of H₂SO₄ = 0.25 mol/L or 0.25 M.
What is Neutralization reaction ?A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water.
The neutralization of a strong acid and strong base has a pH equal to 7.
The neutralization of a strong acid and weak base will have a pH of less than 7, and conversely, the resulting pH when a strong base neutralizes a weak acid will be greater than 7.
When a solution is neutralized, it means that salts are formed from equal weights of acid and base
H₂SO₄(l) + 2NaOH(l) - - - > Na₂SO₄(aq) + 2H₂O((l)
From the Equation
Mole ratio of H₂SO₄ and NaOH = 1 : 2
Molarity of Sodium Hydroxide = 0.200mol/dm3
Molarity = moles of solute/litre of solution
moles of solute = 0.200 * 25 *10⁻³
moles of NaOH = 5 *10⁻³ moles
As Mole ratio of H₂SO₄ and NaOH = 1 : 2
moles of H₂SO₄ = 2.5 *10⁻³
So, the concentration of H₂SO₄ = 0.25 mol/L or 0.25 M.
To know more about Neutralization reaction
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How would you find the density of a can of soda pop?
A. Find the mass of the can of soda pop and then multiply by the number of cubic centimeters in the can
B. Find the mass of the can of soda pop and then divide by the number of cubic centimeters in the can
C. Convert a gallon into cubic centimeters and then divide by the mass of the can of soda pop
D. Convert a gallon into cubic centimeters and then subtract the mass of the can of soda pop
Answer:
it's A.
Explanation:
have uh good day ma :)))))))
11A) As electrical energy is converted into heat energy, the total amount of energy in the system
pls help me out !
Answer:
b. option Is the correct answer
What is the molarity of 125 mL of a 8.25 M NaCl solution that has been diluted to 750. mL?
a) 11 400 M
b) 0.00138 M
c) 1380 M
d) 0.0202 M
e) 1.38 M
Answer:
1.375 M
Explanation:
Using the formula as follows;
C1V1 = C2V2
Where;
C1 = initial concentration/molarity (M)
V1 = initial volume (L)
C2 = final concentration/molarity (M)
V2 = final volume (L)
According to the information in this question;
C1 = 8.25 M
C2 = ?
V1 = 125 mL = 125/1000 = 0.125L
V2 = 750 mL = 750/1000 = 0.750L
Using C1V1 = C2V2
8.25 × 0.125 = C2 × 0.750
1.03125 = 0.750C2
C2 = 1.03125 ÷ 0.750
C2 = 1.375 M
What is the molar mass for Li2S?
Answer:
44.882
Explanation:
Li2S is made up of 2 Li and 1 S
Li's molar mass is 6.941 * (2) = 13.882
S's moalr mass is 32 * (1) = 32
add 12.882 + 32 = 44.882
let me know if you have questions!
6. (20 pts) Provide a synthetic route to prepare the target molecule using the malonic ester synthesis. All the carbon in the product must derive from the given starting materials, but you can use any other necessary reagents.
Answer: Hello some data related to your question is missing attached below is the missing data
answer : attached below is the detailed solution ( synthetic route
Explanation:
Attached below is the synthetic route for the preparation of the target molecule and
we will perform a coupling reaction to get the Final product as seen in the question
10. What is the mass of 2.6 moles of Ag?
O 2.4 x 10-2 g
O 2.9 g
O 280 g
O 1.6 x 1024 g
Answer: 280 g
Explanation:
Balance the following chemical equation. Choose the correct coefficients in the balanced equation in order. *
4, 3, 2
2, 4, 2
1, 1, 1
3, 2, 3
Answer: 4,3,2
Explanation:
26 grams of 2,2 dimethyl hexane( C8H16) under goes combustion. How
much space would the CO2 gas occupy at 26 Celsius and 101.75 kPa?
Answer: The [tex]CO_{2}[/tex] gas occupies a space of 5.57 L at 26 Celsius and 101.75 kPa.
Explanation:
Given: Mass = 26 g
Pressure = 101.75 kPa
Convert kPa into atm as follows.
[tex]1 kPa = 0.00986923 atm\\101.75 kPa = 101.75 kPa \times \frac{0.00986923 atm}{1 kPa}\\= 1 atm[/tex]
Temperature = [tex]26^{o}C = (26 + 273) K = 299 K[/tex]
Now, moles of a substance is defined as mass of substance divided by its molar mass.
As molar mass of 2,2 dimethyl hexane is 114.23 g/mol. So, its number of moles are calculated as follows.
[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{26}{114.23 g/mol}\\= 0.227 mol[/tex]
Formula used to calculate the volume is as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
[tex]PV = nRT\\1 atm \times V = 0.227 mol \times 0.0821 L atm/mol K \times 299 K\\V = 5.57 L[/tex]
Thus, we can conclude that the [tex]CO_{2}[/tex] gas occupies a space of 5.57 L at 26 Celsius and 101.75 kPa.
A bowl containing 150 grams of water, is heated from 25 °C to 100 °C.
The specific heat of water is 4.184 J/gºC. How much heat energy is
required to heat the water?
Answer:
47,070J
Explanation:
Because we use the formula
Eh= m×c×∆T
Which is energy required equals mass times specific heat capacity times change in tempreture (final temp - initial temp )
temperature layer of the atmosphere with strong, steady winds and few weather changes.
What does it called?
Answer:
Stratosphere is heated from below the ozone layer, that because it protect the earth from ultraviolet rays from the sun. Mesophere has strong steady wind and few weather changes because the temperature in the mesophere drops and it has a strong wind coming from the east to the west.
Force which operates when two still objects are in contact with each other is called ________
please tell me i really want to know
Answer:friction
Explanation:
Answer:
frictoin
Explanation:
I think that because our teacher just told us that
Which form of emission is commonly not written in nuclear equations because they do not affect charges, atomic numbers, or mass numbers?
alpha particle
beta particle
gamma ray
Answer: It is Gamma ray
Answer:
C. gamma ray
(Photo for proof at the bottom.)
Explanation:
A gamma ray is a type of radiation that occurs when an unstable nucleus emits a photon, the smallest unit of light. A photon has no mass or charge. Atomic and mass numbers are written based on the mass of the atom. But since no mass is lost when a photon is emitted, writing the emission of it isn't necessary.
Here's a photo of Edge, good luck.
Question 2(Multiple Choice Worth 2 points)
(04.06 LC)
The properties of elements can be predicted by which of the following?
Where it is on the periodic table
Where it was discovered
Its color in its natural state
Its name
Answer:
location on the periodic table
Explanation:
What is the mass number of sodium
Answer:
Explanation:
Sodium mass number 23, 11 electrons
Magnesium: neutrons = 12
aluminum : atomic number = 13
phosporus : protons = 15
Answer:
23
Explanation:
You need to add protons and neutrons to get mass
If a solution has a [H+] of 9.3x10-11, what is the pH?
Answer:
10.03Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log [ {H}^{+} ][/tex]
From the question we have
[tex]ph = - log(9.3 \times {10}^{ - 11} ) \\ = 10.0315...[/tex]
We have the final answer as
10.03Hope this helps you
Consider the chemical equation. 2NBr3 + 3NaOH Right arrow. N2 + 3NaBr + 3HOBr If there are 40 mol of NBr3 and 48 mol of NaOH, what is the excess reactant?
Answer:
NBr₃ is the excess reactant.
Explanation:
2NBr₃ + 3NaOH → N₂ + 3NaBr + 3HOBrWe can solve this problem by calculating how many moles of NaOH would react completely with 40 moles of NBr₃, using the stoichiometric coefficients of the reaction:
40 mol NBr₃ * [tex]\frac{3molNaOH}{2molNBr_3}[/tex] =60 moles NaOHAs the required number of NaOH moles is higher than the available number (60 required vs 48 available), NaOH is the limiting reactant.
As such, the excess reactant is NBr₃.
