Answer:
7.2 moles of titanium weigh 344.7 grams.
Explanation:
Molar mass of titanium = 47.88 g
[tex]1 \: mole \: of \: titanium = 47.88 \: grams \\ 7.2 \: moles \: of \: titanium = g[/tex]
solve for g
[tex]g = ( \frac{7.2 \times 47.88}{1} ) \\ g = 344.7 \: grams[/tex]
Answer:
[tex]\boxed {\boxed {\sf 344.7 \ g \ Ti}}[/tex]
Explanation:
We are asked to find the mass of 7.2 moles of titanium.
To convert from moles to grams, we use the molar mass. This value is the mass of 1 mole of a substance. They are equivalent to the atomic masses found on the Periodic Table, but the units are grams per moles instead of atomic mass units.
Look up titanium's molar mass on the Periodic Table.
Ti: 47.87 g/molConvert moles to grams using dimensional analysis. First, set up a ratio using the molar mass.
[tex]\frac {47.87 \ g \ Ti}{1 \ mol \ Ti}[/tex]
We are converting 7.2 moles to grams, so we multiply the ratio by this value.
[tex]7.2 \ mol \ Ti *\frac {47.87 \ g \ Ti}{1 \ mol \ Ti}[/tex]
The units of moles of titanium cancel.
[tex]7.2 *\frac {47.87 \ g \ Ti}{1 }[/tex]
The denominator of 1 can be ignored (a number over 1 is just the number).
[tex]7.2 *47.87 \ g \ Ti}[/tex]
[tex]344.664 \ g \ Ti[/tex]
We are asked to round to the nearest tenth. The 6 in the hundredth place tells us to round the 6 in the tenth place up to a 7.
[tex]344.7 \ g \ Ti[/tex]
There are approximately 344.7 grams of titanium in 7.2 moles of titanium.
What is the H+ ion concentration of a solution with a pH of 7?
answer=H+]=10-7
explain=the same way, a solution with a pH of 5 contains 10-5mol/l of hydrogen ions, a solution with a pH of 6 contains 10-6mol/l of hydrogen ions, while the solution with a pH of 7 contains 10-7mol/l of hydrogen ions
Chuẩn Độ 15 ml dung dịch CH3COOH 0,2 m bằng dung dịch NaOH 0,2 m
A* tính PH tại các thời điểm trên thêm 10 ml bazơ
* tại thời điểm tương đương
Answer:
I don't know what is the answer of your question sorry never mind..Explanation:
And please marks me as brainliest...molecular weight of K2SO3
Explanation:
the molecular weight of K2SO3 is 158. 2598 m/s.
calculate the total consumer surplus in the amusement park market if they a 12
Answer:
The total consumer surplus is 240.
Explanation:
If p=12 then q=20
0.5×(36−12)×20=240
here's the graph to help you see the change.
The Halogen Group is also known as the?
salt formers
acid makers
Answer:
I think b acid makers
Explanation:
hope it will help you
How much heat does a 100. g sample of copper absorb when its temperature increases by 30.0°C? The specific heat of copper is 0.39 J/g °C.
a) 2340 J
b) 1170 J
c) 2.34 J
d) 1.17 J
Answer:
[tex]\boxed {\boxed {\sf B. \ 1170 \ Joules }}[/tex]
Explanation:
We are asked to find how much heat a sample of copper absorbs when the temperature is increased.
Since we know the mass, temperature increase, and specific heat capacity, we can use the following formula to calculate heat.
[tex]q= mc \Delta T[/tex]
The mass of the copper sample is 100 grams, the temperature is changed or increased by 30.0 degrees Celsius, and the specific heat of copper is 0.39 Joules per gram degrees Celsius.
m= 100 g c= 0.39 J/g °C ΔT= 30.0 °CSubstitute the values into the formula.
[tex]q= (100 \ g )(0.39 \ J/g \textdegree C ) (30.0 \textdegree C )[/tex]
Multiply the first two values. Note that the units of grams cancel.
[tex]q= 39 \ J/ \textdegree C (30.0 \textdegree C )[/tex]
Multiply again, this time the units of degrees Celsius cancel.
[tex]q= 1170 \ J[/tex]
The copper sample absorbs 1170 Joules of heat and Choice B is correct.
9. In order to determine the melting point of tetradecanol, it was important that _____. the thermometer was attached to the capillary tube the water was frozen the capillary tube was immersed in the water without the thermometer
To record the melting point of tetradecanol, it is important the temperature is increase by little degrees after each trial.
The thermometer attached to the capillary tube was immersed in water without thermometer.
Usually heating curve describes the temperature change for a sample which passes through different states of matter.
The temperature than decreases and the solution in beaker cools down. To determine the melting point, it is important to keep the temperature consistent.
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How is a light bulb related to radiation?
A. Light bulbs do not have anything to do with radiation.
B. A light bulb emits radiation when its filament is burned out and can longer emit light. This makes it important to remove dead lightbulbs as soon as they wear out.
C. As light is emitted from the filament, the energy in the metal is replaced as lightbulbs absorb background radiation. This prevents the filament from burning out quickly but the radiation cannot be used as power so electricity is still required for the lightbulb to work.
D. The light emitted by a light bulb is a form of radiation that occurs when the filament heats up and its thermal emission gains enough energy to move into the visible spectrum.
Answer:
As light is emitted from the filament, the energy in the metal is replaced as lightbulbs absorb background radiation. This prevents the filament from burning out quickly but the radiation cannot be used as power so electricity is still required for the lightbulb to work.
I bet no one can solve this
If an electric current of 8.50 A flows for 3.75 hours through an electrolytic cell containing copper-sulfate (CuSO4) solution, then how much copper is deposited on the cathode (the negative electrode) of the cell? (Copper ions carry two units of positive elementary charge, and the atomic mass of copper is 63.5 g/mol.)
What is photosynthesis??...
the process plants use sunlight to synthesize food
Answer:
It is when green plants and other organisms transform light energy into chemical energy.
Which one of the following compounds
contains ionic bonds?
a) NI3
B) HF
c) SiO2
d) CaO
Your answer is CaO.I hope that my answer helped you..
Calculate the solubility of copper(II) hydroxide, Cu(OH)2, in g/L
Answer:
Ksp = [ Cu+² ] [ OH-] ²
molar mass Cu(oH )2 ==> M= 63.546 (1) + 16 (2) + 1 (2) = 97.546 g/mol
Ksp = [ Cu+² ] [ OH-] ²
Ksp [ cu (OH)2 ] = 2.2 × 10-²⁰
|__________|___Cu+² __|_2OH-____|
|Initial concentration(M)|___0__|_0______|
|Change in concentration(M)|_+S |__+2S__|
|Equilibrium concentration(M)|_S _|2S___|
Ksp = [ Cu+² ] [ OH-] ²
2.2 ×10-²⁰ = (S)(2S)²= 4S³
[tex]s = \sqrt[3]{ \frac{2.2 \times {10}^{ - 20} }{4} } = 1.8 \times {10}^{ - 7} [/tex]
S = 1.8 × 10-⁷ M
The molar solubility of Cu(OH)2 is 1.8 × 10-⁷ M
Solubility of Cu (OH)2 =
[tex]Cu (OH)2 = \frac{1.8 \times {10}^{ - 7} mol \:Cu (OH)2 }{1L} \times \frac{97.546 \: g \: Cu (OH)2}{1 \: mol \: Cu (OH)2} \\ = 1.75428 \times 10 ^{ - 5} [/tex]
Solubility of Cu (OH)2 = 1.75428 × 10 -⁵ g/ L
I hope I helped you^_^
Determine if each compound is an alkane, alkene, alkyne, or aromatic compound. This compound has the formula C H 3 C H C (C H 3) C H 2 C H 2 C H 2 C H 3. There is a double bond between carbons two and three. aromatic alkyne alkene alkane This compound consists of a six membered carbon ring with alternating double and single bonds. There is a C H 2 C H 3 group attached to one of the carbon atoms in the ring. alkyne aromatic alkane alkene CH3CH2COCH3 alkyne aromatic alkene alkane CH3(CH2)2CH3 alkane aromatic alkene alkyne
Answer:
C H 3 C H C (C H 3) C H 2 C H 2 C H 2 C H 3
Explanation:
Which of the following is classified as paramagnetic?
1.NO(+)
2.Be2
3.B2(+)
4.+N2(+)
PLEASE HELP ME
a)
b)
c)
or d)?
Answer:
D / 15.0 g
Explanation:
3 % volume thus shows that there are 3 g of an solute in every 100mL of solutions
.. there will be 3 × 5000÷ 100 of H2O2 in a 500 mL bottle
Please comment the chart!!!!!
thanks!!
Answer:
Exothermihic chart
Explanation:
The mass of a container is determined to be 1.2 g. A sample of a compound is transferred to this container, and the mass of the compound plus the container is determined to be 3.06 g. The mass of the compound should be reported as:__.
Answer:
Sorry I don't know what you
According to law of conservation of mass as mass is neither created nor destroyed mass of compound should be reported as 1.86 g that is by subtracting mass of compound from mass of compound and container.
What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.
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What is the main reason for using a data table to collect data?
A. To interpret the possible meaning of the data
B. To find the possible errors that were made in recording the data
C. To organize the information so that it is easier to understand
O
D. To make an experimental journal more attractive
Answer:
c
Explanation:
table of data help us to understand and present our work better
I did it and got it right, it's c
Read the given equation:
Ca(OH)2 + 2HCl → CaCl2 + 2H2O
Which of the following is true about the equation?
Ca(OH)2 is the base and CaCl2 is the salt.
Ca(OH)2 is the acid and CaCl2 is the salt.
HCl is the acid and Ca(OH)2 is the salt.
HCl is the base and Ca(OH)2 is the salt.
Answer:
Ca(OH)2 is the base and CaCl2 is the salt
Explanation:
i think this is the answer because calcium hydroxide has hydroxide ions as the only positively charged ion and calcium chloride is a salt.
I hope this helps
The chemical equation for the formation of calcium chloride has Ca(OH)₂ as the base and CaCl₂ as the salt. Hence, option A is correct.
What is salt?Salt is given as the neutral compound with the presence of the acidic and the basic constituents. The salt can be formed as a result of the neutralization reaction of acid and base.
The acids are comprised of the presence of the hydrogen ion, and the base comprises the presence of the hydroxide ions. Thus, in the given reaction, Ca(OH)₂ is the base and CaCl₂ is the salt. Hence, option A is correct.
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Over a long period of time the process of deposition causes the formation of
O
A. acid rain
OB. glaciers
OC. sedimentary rock
OD. Karst topography
Answer:
C. sedimentary rock
Explanation:
Deposition is basically a process in which sediments are added to land.
How many neutrons does Carbon- 14 and Carbon -15 have? *
Answer: 8 for both
Explanation:
Choose the most correct answer: The endothermic (∆H > 0) reaction:
a) Cannot occur at all temperature.
b) Can occur with the positive ∆S at high temperature.
c) Can occur with the negative ∆S at low temperature.
d) Cannot occur with the positive ∆S at high temperature.
Answer:
B
Explanation:
In order to create spontaneity, an endothermic process has to occur along with positive entropy and high temperature
Please help me! I am a bit stuck on this.
Please help me fast! Pleaseee
I think 2 answer is write
.) At 500 oC, cyclopropane, C3H6, rearranges to form propene. The reaction is first order with a rate constant of 6.7 x 10-4 s-1. If the initial concentration of C3H6 is 0.0500 M, (a) what is the molarity of C3H6 after 30 min
Answer:
0.015 M
Explanation:
For a first order reaction;
ln[A] =ln[A]o - kt
[A] = final concentration
[A]o =initial concentration
k= rate constant
t= time taken
ln[A] =ln[A]o - kt
ln[A] = ln(0.0500) - 6.7 x 10-4 (30 × 60)
ln[A] = -2.9957 - 1.206
ln[A] = -4.202
e^ln[A] = e^(-4.202)
A= 0.015 M
9. Light is used in photosystem II and photosystem I to
O A. power the Calvin cycle.
B. fix carbon dioxide.
C. make carbon dioxide.
D. excite an electron.
Answer:
A. power the Calvin cycle.
Explanation:
because it helps to run theblife of plants with easily
HELP!!!!! Substance A and substance B are mixed together. To separate the mixture, water is added, and substance A is filtered out. Then, the remaining liquid is heated to remove the water, leaving a residue of substance B. Which statement about substance A and substance B could be correct?
A. Substance A is rice, and substance B is sugar.
B. Substance A is alcohol, and substance B is salt.
C. Substance A is sand, and substance B is alcohol.
D. Substance A is sugar, and substance B is instant coffee.
The statement that "substance A is rice, and substance B is sugar" is correct.
WHAT IS A MIXTURE?
A mixture in chemistry is a substance that contains two or more different substances. One notable characteristics of a mixture is that it can easily be separated using physical means.According to this question, a mixture contains two substances A and B. Water is added to this mixture for easy separation.
Substance A is filtered out. This means that substance A is a solid that is insoluble in water. This substance is RICE. The remaining liquid is heated to remove the water content leaving a residue of substance B. This shows that substance B is also a solid but soluble in water. SUGAR best fits this description.Therefore, in the mixture of two substances A and B, substance A is rice, and substance B is sugar.
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Atoms that have a positive or negative electrical charge are called ________.
Explanation:
They are called or known as cations
Which compound shows maximum hydrogen bonding with water? a-Methyl Alcohol b-Ethyl alcohol. Give reason too please.
A) In ethanol, the OH group is present. This means an H atom is attached to an O atom. The electronegativity of an O atom is much greater than an H atom because of this the H atom will get a partial positive charge and the O atom will get a partially negative charge. This is known as a dipole. Hence dipole-dipole interactions will get generated in the molecule and attractive forces will be produced among the molecules of ethanol.
B) There is no hydrogen bonding between diethyl ether molecules because there is no hydrogen atom attached to an electronegative atom like oxygen or nitrogen. So diethyl ether does not show hydrogen bonding.
C) Chlorine is less electronegative as compared to oxygen and nitrogen so it does not show hydrogen bonding. So, ethanol has more hydrogen bonding than ethyl chloride.
D) In trimethylamine, the nitrogen atom is not attached to any hydrogen atoms. So, it will not show any hydrogen bonding.
According to above mentioned points, we can conclude that out of the given options ethanol will have maximum hydrogen bonding.
So, the correct option is (A).
Additional Information:
Properties of hydrogen bonding :
i) Solubility: Because of the hydrogen bonding between water and alcohol molecules, lower alcohols are soluble in water.
ii) Volatility: Compounds having hydrogen bonding between different molecules have a higher boiling point and a higher boiling point means the compound is less volatile.
iii) Viscosity and surface tension: The substances which contain hydrogen bonding exist as an associated molecule. They have higher viscosity and high surface tension
Leo carefully pipets 50.0 mL of 0.500 M NaOH into a test tube. She places the test tube
into a small beaker to keep it from spilling and then pipets 75.0 mL of 0.250 M HCl into
another test tube. When Leo reaches to put this test tube of acid into the beaker along
with test tube of base she accidentally knocks the test tubes together hard enough to
break them and their respective contents combine in the bottom of the beaker. Is the
solution formed from the contents of the two test tubes acidic or basic? What is the pH of
the resulting solution?
Please answer below questions one by one to assist you receive full credits
(Alternatively, you can discard my hints below, solve the problem using your own way
and send me the picture/copy of your complete work through email)
The mole of NaOH before mixing is
mol (save 3 significant figures)
The mole of HCl before mixing is
mol (save 4 significant figures)
After mixing, the solution is
(choose from acidic or basic)
The total volume of mixture is
L (save 3 significant figures)
The concentration of [OH-] is
M (save 3 significant figures)
The concentration of [H'l is
M (save 3 significant figures)
Let's consider the neutralization reaction between HCl and NaOH.
NaOH + HCl ⇒ NaCl + H₂O
To determine the pH of the resulting mixture, we need to determine the reactant in excess. First, we will calculate the reacting moles of each reactant.
NaOH: 0.0500 L × 0.500 mol/L = 0.0200 mol
HCl: 0.0750 L × 0.250 mol/L = 0.0188 mol
Now, let's determine the reactant in excess and the remaining moles of that reactant.
NaOH + HCl ⇒ NaCl + H₂O
Initial 0.0200 0.0188
Reaction -0.0188 -0.0188
Final 1.20 × 10⁻³ 0
The volume of the mixture is 50.0 mL + 75.0 mL = 125.0 mL. Then, 1.20 × 10⁻³ moles of NaOH are in 125.0 mL of solution. The concentration of NaOH is:
[NaOH] = 1.20 × 10⁻³ mol/0.1250 L = 9.60 × 10⁻³ M
NaOH is a strong base according to the following equation.
NaOH ⇒ Na⁺ + OH⁻
The concentration of OH⁻ is 1/1 × 9.60 × 10⁻³ M = 9.60 × 10⁻³ M.
The pOH is:
pOH = -log [OH⁻] = -log 9.60 × 10⁻³ = 2.02
We will calculate the pH using the following expression.
pH = 14.00 - pOH = 14.00 - 2.02 = 11.98
The pH is 11.98. Since pH > 7, the solution is basic.
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