Answer: C
Explanation: Hope this help :D
what charge does copper have?
Answer: 1+charge
Explanation: hoped this helped:)
A piece of copper has a density of 8.96 g/cm3, what is the volume of a 4.2 g piece?
Answer:
0.47 cm³
Explanation:
[tex]Volume=Mass/Density\\[/tex]
Plug in the mass (4.2 grams) and the density (8.96 g/cm³)
[tex]Volume=4.2/8.96\\Volume=0.47[/tex]
Therefore, the volume of a 4.2 g piece of copper is approximately 0.47 cm³.
I hope this helps!
What is the ratio of the volume of oxygen gas to the
volume of water vapor in the following reaction?
Answer:
The ratio of volumes in the given case illustrates the Gay Lussac's Law of Gaseous Volumes.
- The law was given by the french chemist Gay Lussac in the year 1806.
- He stated that when gases are combined or are produced in a chemical reaction, they do so in a simple ratio by volume.
- It is given that 2 volumes of hydrogen combine with 1 volume of oxygen producing 2 volumes of water.
- This is in accordance with this law.
Explanation:
Which of the Following is a true statement regarding a strong acid such as 0.1M HNO3(aq) and weak acid such as HF?
A. 0.1 M HNO3 (aq) solution contains more H+ than HF(aq) solution
B. 0.1 M HNO3 (aq) solution contains less H+ than HF(aq) solution
C. 0.1M HNO3 (aq) solution contains the same amount of H+ as HF (aq) solution
D. 0.1M HNO3 (aq) solution has a higher pH then the HF (aq) solution
Answer:
A. 0.1 M HNO3 (aq) solution contains more H+ than HF(aq) solution
A cation with a +4 charge has 26 neutrons and 18 electrons. What is the identity of the element?
Answer: Titanium has 22 protons
Explanation: If an atoms donates 4 electrons, it forms cation with charge +4. So original atom have 22 electrons and because atom is neutral, it has 22 protons. Number of neutrons does not matter, there are more neutrons than protons in heavier atoms.
What is the % Yield if 3.8 g of Cu was produced?
How many moles in 2.5 x 10^24 atoms of calcium
There are 6.02*10 ^23 atoms in one mole of any substance according to avogadros law. Therefore in 2.41*10 ^25 calcium atoms, there are (2.41*10 ^25/6.02*10 ^23) moles of calcium, which is 40.03322259 or approximately 40 moles of calcium.
What is a synonym for smart or intelligent cause i cant use either
Answer:
sharp clever bright
Explanation:
s
Answer:
will you friend me please
Calculate the pH and pOH of a solution of sodium hypoiodite NaOI, with a formal concentration of 0.05784 mol L-1. Note that the compound is soluble, dissolves into sodium and hypoiodite ions, and these react with water. The p K a of hypoiodous acid at 298 K is 10.64. Calculate the pH and the pOH of the resulting solution. Use all the approximations you can, be sure to verify them.
Answer:
pH = 11.70
pOH = 2.298
Explanation:
As we know
NaOI + H2O NaOH + HOI
pH = 7 + ½ (pKa + log (HOI))
Substituting the given values, we get –
pH = 7 + ½ (10.64 + log (0. 0.05784))
pH = 7 + ½ (10.64 -1.2377)
pH = 11.70
pOH = 14 – pH
pOH = 14 -11.70
pOH = 2.298
Crystallization: What is the difference between raw and pure products?
Answer:
Hello There!!
Explanation:
Pure products come from and made where they are original made and raw products are just pasteurized with no added ingredients included in them.
hope this helps,have a great day!!
~Pinky~
If a gas is cooled from 343.0 K to 283.15 K and the volume is kept constant what final pressure would result if the original pressure was 760.0 mm HG?
Answer:
627.4 mmHg
Explanation:
From Gay-Lussac law:
[tex] \frac{p1}{t1} = \frac{p2}{t2} [/tex]
p1 = 760 mmHg
t1 = 343 K
t2=283.15 K
[tex]p2 = p1 \times \frac{t2}{t1} [/tex]
[tex]p2 = 760 \times \frac{283.15}{343.0} [/tex]
[tex]p2 = 627.4 \: mmhg[/tex]
If a gas is cooled from 343.0 K to 283.14 K and the volume is kept constant the final pressure would be 627.4 mm Hg if the original pressure was 760.0 mm Hg.
Gay-Lussac's LawGay-Lussac's law states that the pressure of a given mass of gas at a constant volume varies directly with the temperature of the gas. Gay-Lussac's law defined the relationship between pressure and temperature of a gas when kept at a constant volume.
According to the Gay-Lussac's LawP ∝ T (When V = constant)
or, P = kT
or, [tex]\frac{P_1}{T_1} = \frac{P_2}{T_2}[/tex]
Here,
[tex]P_{1}[/tex] = 760.0 mm Hg,
[tex]T_{1}[/tex]= 343.0 K
[tex]T_{2}[/tex] = 283.15 K
Now put the values in above formula, we get
[tex]\frac{P_1}{T_1} = \frac{P_2}{T_2}[/tex]
[tex]\frac{760.0\ \text{mm Hg}}{343.0K} = \frac{P_2}{283.15\ K}[/tex]
[tex]P_{2} = \frac{760.0\ \text{mm Hg} \times 283.15\ K}{343.0\ K}[/tex]
[tex]P_{2} = \frac{215194\ \text{mm Hg}}{343}[/tex]
[tex]P_{2}[/tex] = 627.4 mm Hg
Thus, we can say that if a gas is cooled from 343.0 K to 283.14 K and the volume is kept constant the final pressure would be 627.4 mm Hg if the original pressure was 760.0 mm Hg.
Learn more about Gay-Lussac's Law here: https://brainly.com/question/24691513
#SPJ2
URGENT PLEASE HELP! Given 3.4 grams of x element with a molar mass of 24 g/mol and 4.2 grams of y element with a molar mass of 35 g/mol. How much of compound xy2 can be generated?
x + 2y -> xy2
4.4 g XY
I'm not sure but that's the closest I can get or try
Which of the following is NOT correct about the mole concept?
1 point
1 mole of sodium atoms will ionize to produce 1 mole of sodium ions and 1 mole of
electrons
A mole is the number of carbon atoms in 12g of C-12 isotope.
A mole is the number of molecules in 22.4 dm3 of all gases at all temperatures and
pressures
A mole is the number of electrons that carry one Faraday of electricity
A mole is the number of molecules of water in 18 g of ice, water or water vapour
Answer:
a mole is the number of molecules in 22.4 dm³ for all gases at all temperatures and pressures
If 18.0 g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and
H2O, how many grams of H20 are produced in this reaction?
O 3.68 g
9.0 g
14.7 g
None of the above
7.37 g
Answer:
3.68 g
Explanation:
[tex]n_{CO2}[/tex] = 18 ÷ 44 = 0.4
2C2H2 + 5O2 → 4CO2 + 2H2O
2 : 5 : 4 : 2
0.409 (moles)
⇒ [tex]n_{H2O}[/tex] = 0.409 × 2 ÷ 4 = 0.2045 moles
⇒ [tex]m_{H2O}[/tex] = 0.2045 × 18 = 3.68 grams
2) Using the following equation:
Water is added to iron and over time iron (III) oxide along with hydrogen gas is produced.
a. How many grams of iron (III) oxide will be produced when 15.5g of iron reacts with excess water?
b. Calculate the percent yield if your team produced 14.5g of iron (III) oxide.
c. If the reaction takes place under STP then how many liters of hydrogen gas are produced?
the answer is 133
because thats how the water is
what are the isomers of hexane
Physical properties
Isomer M.P. (°C) B.P. (°C)
n-hexane −95.3 68.7
3-methylpentane −118.0 63.3
2-methylpentane (isohexane) −153.7 60.3
2,3-dimethylbutane −128.6 58.0
1 more row
what is the process by which gas changes to a solid
what do you mean by antibodies
During the age of the dinosaurs, most mammals grew no bigger than a?
Answer:
T-rex
Explanation:
How can you tell if an atom has a positive charge? What type of ion is this?
Answer:i love you
Explanation:
Answer: An atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom. If the atom has more electrons than protons, it is a negative ion, or ANION. If it has more protons than electrons, it is a positive ion.
Explanation:
Calculate the molar mass of PbSo3
Answer:
Lead sulfite is the inorganic compound with the formula PbSo3 or O3PbS.
Explanation:
7 organic compounds of plant origin
Answer:
carbohydrates, lipids, proteins and nucleic acidsWhat type of matter do alloys fall under?
a) Element
b) Compound
c) Heterogeneous mixture
d) Homogeneous mixture
Answer:
An alloy is a homogeneous mixture
Explanation:
D
An alloy, a metallic substance composed of two or more elements, as either a compound or a solution is a homogeneous mixture. The correct option is d.
What is an alloy?An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of metal in the resulting material, such as electrical conductivity, ductility, opacity, and lustre, but may have properties that differ from those of pure metals, such as increased strength or hardness.
In some cases, an alloy may reduce the overall cost of the material while preserving important properties. In other cases, the mixture imparts synergistic properties to the constituent metal elements such as corrosion resistance or mechanical strength. Alloys are defined by a metallic bonding character. The alloy constituents are usually measured by mass percentage for practical applications, and in atomic fraction for basic science studies.
Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the alloy.
Learn more about alloy, here:
https://brainly.com/question/3718729
#SPJ6
What is the difference between 13.254 m/s and 7.7 m/s? Round your answer to the correct number of significant digits.
Answer:
5.6 m/s
Explanation:
Given,
First number = 13.254 m/s
Second number = 7.7 m/s
We need to find the difference between these two numbers. First we round off 13.254 to one decimal place i.e. 13.254 = 13.3 m/s
The difference between them is given by :
D = 13.3 - 7.7
= 5.6 m/s
Hence, the difference of the two numbers is 5.6 m/s.
a gas has a pressure of 0.470 atm at 60.0 C. What is the pressure at standard temperature?
Answer:
P2=0.385atm
Explanation:
step one:
Given that the temperature T1= 60 Celcius
we can convert this to kelvin by adding 273k to 60 Celcius
we have T1= 333k
pressure P1= 0.470 atm
step two:
we know that the standard temperature is T2= 273K
Applying the temperature and pressure relationship we have
P1/T1=P2/T2
substituting our given data we have
0.47/333=P2/273
cross multiply we have
P2= (0.47*273)/333
P2= 128.31/333
P2=0.385 atm
Draw the atomic structure with electronic configuration of Potassium
Answer:
Explanation:
i try to help you
✧Kindly see the attached picture! ☄
♪ Hope I helped! ♡
[tex] \star[/tex] Best regards! ツ
☞ [tex] \underbrace{ \overbrace{ \mathfrak{Carry \: On \: Learning}}}[/tex] ✎
An acetate buffer solution is prepared by combining 50. mL of 0.20 M acetic acid,
HC2H3O2(aq), and 50. mL of 0.20 M sodium acetate, NaC2H3O2(aq). A 5.0 mL sample of 0.10 M NaOH(aq) is added to the buffer solution.
Which of the following is a correct pairing of the acetate species present in greater concentration and of the pH of the solution after the NaOH(aq) is added? (The pKa of acetic acid is 4.7.)
Acetate Species -- pH
(A) HC2H3O2 -- < 4.7
(B) HC2H3O2 -- > 4.7
(C) C2H3O2 -- < 4.7
(D) C2H3O2 -- > 4.7
Answer:
The answer is "Option B".
Explanation:
[tex]\to CH_3COOH + NaOH \longleftrightarrow CH_3COONa + H_2O\\\\\to CH_3COONa + NaOH\longleftrightarrow CH3COONa\\\\\therefore \ mol\ NaOH = (5 \ E-3\ L)\times(0.10 \ \frac{mol}{L}) = 5 \ E-4\ mol\\\\[/tex]
[tex]\to mol\ CH_3COOH = (0.05 \ L)\times(0.20 \frac{mol}{L}) = 0.01 \ mol\\\\\to C \ CH_3COOH = \frac{(0.01 \ mol - 5 \ E-4\ mol) }{(0.105 \ L)}\\\\\to C \ CH_3COOH = 0.0905 \ M\\\\\therefore \ mol \ CH_3COONa = (0.05\ L )\times (0.20 \ \frac{mol}{L}) = 0.01 \ mol\\\\[/tex]
[tex]\to C \ CH_3COONa = \frac{(0.01\ mol + 5 \ E-4\ mol)}{(0.105\ L )}\\\\\to C \ CH_3COONa = 0.1 \ M\\\\\therefore Ka = ([H_3O^{+}]\times \frac{(0.1 + [H_3O^+]))}{(0.0905 - [H_3O^+])} = 1.75\ E-5\\\\\to 0.1[H_3O^+] + [H_3O^+]^2 = (1.75 E-5)\times (0.0905 - [H_3O^+])\\\\[/tex]
[tex]\to [H_3O^+]^2 \ 0.1[H_3O^+] = 1.584\ E-6 - 1.75\ E-5[H_3O^+]\\\\\to [H_3O^+]^2 + 0.1000175[H_3O^+] - 1.584 \ E-6 = 0\\\\\to [H_3O^+] = 1.5835\ E-5 \ M\\\\\therefore pH = - \log [H_3O^+]\\\\\to pH = - \log (1.5835 \ E-5)\\\\ \to pH = 4.8004 > 4.7[/tex]
If a gas in a container with a fixed volume has a pressure of 748 torr at 15°C, the pressure will
double at__ °C
Answer:
576K
Explanation:
Using the formula
P1/T1 = P2/T2
Where;
P1 = initial pressure (torr)
P2 = final pressure (torr)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information provided in this question,
P1 = 748 torr
P2 = 1496 torr
T1 = 15°C = 15 + 273 = 288K
T2 = ?
Using P1/T1 = P2/T2
T2 = P2T1/P1
T2 = (1496 × 288) ÷ 748
T2 = 430848 ÷ 748
T2 = 576K
Express the Following number in scientific notation with 3 significant figures:
450,000
[ ? ] x 10 to the power of ?
Answer:
4.50x10^5
Explanation:
dont forget the zero on the 4.50
4 methyl 2 pentanone structural formula
Answer:
(CH3)2CHCH2COCH3
Explanation: