Covert 645g of CuCl2 to mole
Answer:
kombinasi kuda-kuda belakang
Explanation:
maaf kalau salahnya
What is volume?
A. The amount of space an object takes up
B. The amount of matter in an object or substance
C. The length of an object
D. The number of particles in an object or substance
Answer:
Volume is the amount of space an object takes up. I hope this helps you! :D
What caused the channel on Mars? water or lava? give reasoning and evidence
Answer:
A channel in an ancient Martian "riverbed" wasn't carved by liquid water but was built by molten lava, according to a new study of surface features on Mars. ... On Earth, lava tubes form during sustained volcanic eruptions, when lava flowing through previously solidified masses leaves behind empty channels in the rock
Explanation:
The lava, itself (when liquid) is very much above the boiling point of water, so it is not wet with liquid water, so it's a no in that sense,' he writes. ... Lava does contain a lot of water, especially prior to eruption (when it's called magma), but also as it flows across the ground,' he explained.
Answer:
it was both both if you ask me it's water
Explanation:
il explain answer if you brainly me
Please help me with all ASAP I’ll mark brainly
Answer:
Explanation:
1.c
2.j
3.h
4.b
5.f
6.d
7.a
8.i
9.e
10.g
28.5 g of iron shot is added to a graduated cylinder containing 45.50 mL of water. The water level rises to the 49.10 mL mark. From this information, calculate the density of iron.
HELLPPP CAN SOMEONE SOLVE THIS???
Answer:
Density if iron shot = 7.92 g/ml (2 sig. figs.)
Explanation:
By definition, density is mass per unit volume. That is,
Density (D) = mass(m)/Volume(V)
mass(m) = 28.5g (given)
Volume(V, of iron shot) = 49.10ml - 45.5ml = 3.6ml
Substitutuing into D = m/V = 28.5g/3.6ml = 7.9166667 g/ml (calc.ans)
≅ 7.92 g/ml (2 sig. figs.)
Hope this helps. :-)
Is this equation balanced and in the lowest form?
4NH3 → 2N2 + 6H2
Answer:
It's balanced but not in the lowest form
Explanation:
The actual equation is given by
[tex]\\ \sf\longmapsto 2NH_3\longrightarrow N_2+3H_2[/tex]
4. Some biologists declare "structure determines functions." The 3-D molecular geometry in small molecules (or units of molecules) are critical in the final shape of larger structures. Give an example, not found in your notes or textbook that illustrate how a change a final shape can affect how the structure functions (or how other substances interact with it) and explain your choice.
Is water wet? Why or why not
Answer: umm, yes? DUH
Explanation: touch some falling out of a tap
Answer:
Water is wet,
Explanation:
in the sense of being a liquid which flows easily, because its viscosity is low, which is because its molecules are rather loosely joined together. So it is wet.
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Can this balance be read to the nearest milligram?
O no
O yes
Answer:
30
Explanation:
yes of courseeee i cant balance with the nearest milligram
What is the mass % of acetone in a 1.85 M solution of acetone (MM = 58.08 g/mol) in water? The density of the solution is 0.971 g/mL.
A 1.85 M acetone solution (MM = 58.08 g/mol) with a density of 0.971 g/mL has a mass percent of acetone of 11.0%.
What is the mass percent?It refers to the mass of solute in 100 grams of solution.
Let's suppose we have 1 L of the solution.
Step 1: Calculate the mass of solute (acetone).We have a 1.85 M solution of acetone (MM = 58.08 g/mol). We will calculate the mass of acetone using the following expression for molarity.
M = mass acetone / MM acetone × liters solution
mass acetone = M × MM acetone × liters solution
mass acetone = 1.85 mol/L × 58.08 g/mol × 1 L = 107 g
Step 2: Calculate the mass of the solution.We have 1 L (1000 mL) of the solution with a density of 0.971 g/mL.
1000 mL × 0.971 g/mL = 971 g
Step 3: Calculate the mass percent of acetone.%acetone = (107 g/971 g) × 100% = 11.0 %
A 1.85 M acetone solution (MM = 58.08 g/mol) with a density of 0.971 g/mL has a mass percent of acetone of 11.0%.
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It is important to understand that while the absorbance value is related to the amount of light absorbed by a sample, it is not equal to or directly proportional to the amount of light absorbed. Consider a situation where 100 photons of light pass through a sample. After the light passes through the sample, 64 photons are detected. a) How many photons were transmitted through the sample
When 100 photons of light pass through a sample and 64 photons are detected after the passage of light, the number of photons transmitted through the sample is 64.
This is based on the methods of calculating the absorbance of light, which is depicted as the higher the amount of light transmission, the lower the amount of light absorbed.
Thus, when 64 photons of light in 100 photons are detected, 64 photons are transmitted, and therefore, the number of photons absorbed is 36.
Hence, hypothetically, if 100 photons of light are transmitted, 0 photons of light will be absorbed.
Therefore, in this case, it is concluded that the correct answer is 64 photos.
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Vitamin D is produced in the skin when 7-dehydrocholesterol reacts with UVB rays (ultraviolet B) having wavelengths between
270 nm and 300 nm. What is the energy range Emin < E< Emax of the UVB photons?
The energy range expected is 6.6 × 10^-19 J < E < 7.33 × 10^-19 J
The energy of the photon is given by;
E = hc/λ
E = energy of the photon
h = Plank's constant
c = speed of light
λ = wavelength of light
For the upper boundary range;
E = ?
h = 6.6 × 10^-34 Js
c = 3 × 10^8 m/s
λ = 270 × 10^-9
E = 6.6 × 10^-34 Js × 3 × 10^8 m/s / 270 × 10^-9
E = 7.33 × 10^-19 J
For the lower range;
E = ?
h = 6.6 × 10^-34 Js
c = 3 × 10^8 m/s
λ =300 × 10^-9
E = 6.6 × 10^-34 Js × 3 × 10^8 m/s / 300 × 10^-9
E = 6.6 × 10^-19 J
Hence, the energy range 6.6 × 10^-19 J < E < 7.33 × 10^-19 J
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what happens to a circuits resistance (R), voltage (V), and current (I) when you increase the diameter of the wire in the circuit?
a. R increases, V is constant, I increases
b. R decreases, V is constant, I increases
c. R decreases, V increases, I increases
d. R increases, V decreases, I decreases
Answer:
b. R decreases, V is constant, I increases
Explanation:
when we increase the diameter of wire increases ,resistance decreases and current increases.Therefore, the option is b.
Resistance is an electrical quantity which opposes the electric current in the circuit. Resistance is directly proportional to the length of the wire and inversely proportional to the diameter of the wire. If length of wire increases resistance will increases and if the diameter of the wire increase resistance will decreases.
R = ρ L/A
Here ρ is the resistivity
L is the length of the wire
A is the cross-sectional area of wire/diameter of the wire
Voltage is the potential difference between two terminals of voltage source. Current is the flow of electrons in the circuit. Voltage is the product of current and resistance.
V=IR
Rewrite the above equation interms of current
I=V/R
From the above equation we can say that current is inversly proportional to the resistance.Therefore,the correct option is b.
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Is halogen radioactive
Answer: yes
Explanation:
The flask contains 25 mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Titrate the solution with NaOH to determine the concentration of the acid. Perform a titration by setting the concentration of the NaOH solution and adding it to the acid solution using the different Add Base buttons. The equilvalence point of the titration is passed when the indicator color changes. The unknown sample can be titrated multiple times by pressing the Retitrate button and starting over. Enter the concentration of the unknown acid solution.
To obtain accurate results, follow the following procedure:
switch the indicator to phenolphthalein titrate 1 mL at a time until solution turns pink, make note of volume added retitrate add 1 mL at a time until 1 mL less than the first titration add 0.05 mL at a time until the solution just turns pink
Answer:
The flask contains 25 mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Titrate the solution with NaOH to determine the concentration of the acid. Perform a titration by setting the concentration of the NaOH solution and adding it to the acid solution using the different Add Base buttons. The equilvalence point of the titration is passed when the indicator color changes. The unknown sample can be titrated multiple times by pressing the Retitrate button and starting over. Enter the concentration of the unknown acid solution.
Explanation:
A 5.60 g sample of a weak acid with
Ка 1.3 x 10-4 was combined with 5.00 mL of
5.80 mol L-1 NaOH and the resulting solution
was diluted to 750 mL. The measured pH of the
solution was 4.35.
What is the molar mass of the weak acid
Answer:
pKa = - log Ka = - log (1.3 * 10^-4) = 3.886 5.20 mL of 6.20 M NaOH = 0.00520 L * 6.20 mole…
Explanation:
What is the main component of natural gas
Answer:
I believe that would be methane! I hope this helps you!
Answer:
methane
Explanation:
The largest component of natural gas is methane, a compound with one carbon atom and four hydrogen atoms (CH4). Natural gas also contains smaller amounts of natural gas liquids (NGL, which are also hydrocarbon gas liquids), and nonhydrocarbon gases, such as carbon dioxide and water vapor.The main component in natural gas is methane. It also has ethane, propane, butane, hydrocarbons.
What is the Ideal level for chlorine in a spa?
Answer:
at least 3 ppm in hot tubs/spas
Explanation:
Determine the total mass of 5 moles of CuSO4.5H2O
Answer:
Answer: 1247.5 grams
Explanation:
explanation on image .
Please help me with this I’ll give you extra credit it’s due in 10 minutes thank youuu!!! :))
Answer:
Okay ask away. . . You haven't asked anything that we would be able to answer
The two boron atoms listed in the table are isotopes of the boron. The two carbon atoms and the two oxygen atoms are also called isotopes. Based on the patterns in the particle compositions of these atoms, write a definition for “isotopes”
Answer:
A type of an atom which has a different number of neutrons but the same atomic number, therefore making it the same element. This atom would still have the same properties as well. (Ex: Vanadium-51 is an isotope of Vanadium that has 51 neutrons but still has 23 protons, as its atomic number is 23.)
Isotopes are variants of an element that have the same number of protons in their atomic nucleus, identifying them as the same chemical element, but differ in the number of neutrons.
The variations in neutron numbers among isotopes lead to differences in their atomic masses, resulting in isotopes having slightly different physical properties while retaining similar chemical behavior.
For example, in the case of boron, the two isotopes listed may have the same number of protons (5), but one has 6 neutrons, and the other has 7 neutrons, leading to slightly different atomic masses.
Similarly, for carbon and oxygen, the isotopes exhibit variations in neutron numbers while maintaining the same number of protons, defining them as isotopes of the respective elements. Isotopes play a crucial role in various scientific fields, including radiometric dating, nuclear energy, and medical imaging.
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What is the CATHODE half-reaction for the cell
Cu(s)—> Cu2+ (aq)||Ag+ (aq)|Ag(s)?
Answer:
Ag/Ag+ electrode is cathode and Cu/Cu+ electrode is anode.
~im not sure it its correct i found it~
Explanation:
The Russian Mir space station used a chemical oxygen generator system to make oxygen for the crew. The system ignited a tube of solid lithium perchlorate (LiClO4) to make oxygen and lithium chloride (LiCl): LiClO4 (s) 2O2 (g) + LiCl (s) If you have 300 g of LiClO4, then… (a) How many moles of oxygen gas will be generated?
(b) The station’s standard operating conditions are a pressure of 101.5 kPa and a temperature of 21°C. Based on this information and your answer to part (a), how many liters of oxygen gas will be generated? (Show your work.)
300 g of LiClO₄ produce 5.64 moles of O₂, which is equivalent to 136 L of O₂ at 101.5 kPa and 21 °C.
Let's consider the following balanced equation.
LiClO₄(s) ⇒ 2 O₂(g) + LiCl(s)
We can calculate the moles of O₂ produced from 300 g of LiClO₄ using the following relationships.
The molar mass of LiClO₄ is 106.39 g/mol.The molar ratio of LiClO₄ to O₂ is 1:2.[tex]300 g LiClO_4 \times \frac{1molLiClO_4}{106.39gLiClO_4} \times \frac{2molO_2}{1molLiClO_4} = 5.64molO_2[/tex]
Then, we will convert 101.5 kPa to atm using the conversion factor 1 atm = 101.325 kPa.
[tex]101.5 kPa \times \frac{1 atm}{101.325kPa} = 1.002atm[/tex]
Next, we will convert 21 °C to Kelvin using the following expression.
[tex]K = \° C + 273.15 = 21\° C + 273.15 = 294 K[/tex]
Finally, we will calculate the volume occupied by 5.64 moles of oxygen using the ideal gas equation.
[tex]P \times V = n \times R \times T\\\\V = \frac{n \times R \times T}{P} = \frac{5.64 mol \times (\frac{0.082atm.L}{mol.K} ) \times 294K}{1.002atm} = 136 L[/tex]
300 g of LiClO₄ produce 5.64 moles of O₂, which is equivalent to 136 L of O₂ at 101.5 kPa and 21 °C.
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similarities between viruses and fungi
Answer:
I can't think of any similarities at all.
Viruses are just an aggregation of genomic material and protein. Occasionally lipid folds around it to make a covering called an envelope.
Fungi are living, eukaryotic cells that metabolize, grow, perform energy conversions and mate with each other.
The temperature at which a solid melts is the same as the temperature at which its liquid form solidifies (true or false)
its false not true................
Answer:
True
Explanation:
This is true because, upon cooling the particles in a liquid loses energy, stops moving and remains constant and the forms a solid.
Therefore we can say the freezing point and melting point occurs at the same temperature
What elements are in H2F5BLi and how many atoms are in each element.
20 point plus brainliest
Answer:
2 hydrogen
5 fluorine
1 boron
1 lithium
Write a balanced chemical equation based on the following description:
the reaction of gaseous tricarbon octahydride with oxygen gas produces gaseous carbon dioxide and water vapor
Answer:
C3H8(g) + 5O2(g) = 3CO2(g) + 4H2O(g)
Explanation:
What is the source of the magma that erupts from a volcano?
outer core
inner core
mantle
Earth's oceans
Answer:
the magma comes from the mantle
detailed description of how group 1 atoms bond with group 7 atoms
Answer:
group 7 atoms react
Explanation:
When a group 7 element takes part in a reaction, its atoms each gain one electron. These atoms form negatively charged ions . The ions have a stable arrangement of electrons, with a complete outer shell.
need help :( number 5 and 6