Answer:
hcl is a covalent compound
Explanation:
A video-disc player that is not playing still uses 6.0 W of power. What is the
current into the video-disc player if it is plugged into a standard 120-V outlet?
Answer: 0.05 A
Explanation:
Hope this helps!
A video-disc player that is not playing still uses 6.0 W of power. The current is 0.05 A.
What is Power?
The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.
Power is related to other factors; for instance, the power required to move a ground vehicle is equal to the product of the vehicle's velocity, traction force on its wheels, and aerodynamic drag.
A motor's output power is calculated by multiplying its torque output by the angular velocity of its output shaft. Similar to how the power expended in an electrical component of a circuit is the result of the current.
Therefore, A video-disc player that is not playing still uses 6.0 W of power. The current is 0.05 A.
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What is the difference between natural and artificial radioactivity?
What is the difference between natural and artificial radioactivity?
Natural radioactivity comes from elements in nature. Artificial radioactivity comes from elements created in nuclear reactors and accelerators.
Answer:
natural is made from grass and artificial is made from toxic gas
Explanation:
yes
What is the empirical formula of a compound containing 65.5 grams carbon, 5.5 grams hydrogen, and 29.0 grams oxygen?
Answer: The empirical formula is C₃H₃O.
Explanation: Assume we have 100 g of the compound. Then we have 65.65.5 g of C, 5.5 g of H, and 29.0 g of O.
Answer:
C₃H₃O
Explanation:
I took the test
A 33.6 mL solution of KCl has a mass of 27.29 g. After evaporating to dryness, the dry salt residues has a mass of 6.31 g. Calculate the following: a. %m/m b. Molarity (M)
For the molarity and the percentage of the mass of kcl are mathematically given as
%m/m = 23.1%, molarity = 3.38M
What is the molarity?
Generally, the equation for the percentage of the mass of kcl is mathematically given as
(mass of kcl/mass of solution)x 100
therefore
%m/m = (6.31/27.29)x100
%m/m = 23.1%
The molarity
(no of mol/ vol of sol)
molarity = 0.0846mol/0.0250 L
molarity = 3.38M
In conclusion, the molarity is given as
molarity = 3.38M
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Which subshell holds the valence electrons of barium?.
Answer:
6s
Explanation:
Barium is in group 2 of the s block and is in period 6.
Barium belongs to the s block's period 6 and group 2. Barium is an alkaline earth metal with two valence electrons and a (+2) oxidation state found in Periodic Table Group 2.
How are the valence electrons located?Valence electrons are electrons in an atom's outermost shell, or energy level. For example, oxygen has six valence electrons, two of which are in the 2s subshell and four of which are in the 2p subshell. For neutral atoms, the number of valence electrons is the same as the number of the atom's main group. The column of a periodic table element can be used to determine its main group number. Carbon, for example, belongs to group 4 and has four valence electrons, which are the outermost (valence) shell electrons of an atom that can be shared or transferred to another element.To learn more about valence electrons refer to:
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A sample of gas has an initial volume of 3.62 L at a pressure of 0.987 atm. If the volume of the gas decreases to 2.50 L, what will the pressure be
Answer: 1.43 atm
Explanation:
(Word equation) which of the four metals - aluminium, copper, lead and silver is the most reactive
Answer:
Aluminum
Explanation:
I just used the Reactivity Series chart :)
compare and contrast then 4 types of friction?
Answer:
There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Static friction is strongest, followed by sliding
Explanation:
hope i help!.
Which ion is formed when an atom of fluorine (f) gains one electron? f–1 f–2 f 1 f 2
Answer:
If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -1.
Explanation:
hope this helps
pls mark brainliest
The freezing point of pure benzene (C₆H₆) is 5. 49 °C. The freezing point of a solution made using toluene (C₇H₈) in benzene is determined to be -13. 0 °C. What is the molality of the toluene? (Kf benzene = 5. 12 °C/m)
The molality of the toluene is 1.46 mol/kg.
What is molality?The molality of a solution is its molal concentration. Molal concentration is denoted by m. It is the mol of solute dissolves in 1 Kg solvent.
The depression at freezing point is directly proportional to the molality of the solution. The equation we use for this type of problem is:
ΔT=iKm [tex]f_m[/tex]
Where, ΔT [tex]f_m[/tex] is depression at freezing point, i is Van't hoff factor, m is molality and [tex]K_f[/tex] is the freezing point depression constant.
Toluene is a non-electrolyte and so the value of i for this is 1.
Depression at a freezing point is given as -13.[tex]0^0[/tex] and the [tex]K_f[/tex] is given as 5.12. So, we could calculate the molality of the solution using the equation written above.
Let's plug in the values in the equation:
ΔT=iKm[tex]f_m[/tex]
-7.51 =1 x5. 12 xm
m = [tex]\frac{7.51}{5. 12}[/tex]
m = 1.46 m
It means the molality of the solution is 1.46 mol/kg.
Hence, the molality of the solution is 1.46 mol/kg.
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H3C•
O=(
c
•CH3 can interact with
other like molecules through
dispersion
forces, dipole-
only dispersion
only dispersion
forces and
dipole and
forces
dipole-dipole
hydrogen bonds
Please help me
Answer:
c
Explanation:
H3C•O=(c•CH3 can interact with other like molecules through only only dispersion forces and dipole dipole forces. option B is correct.
What are dipole dipole forces?The force of dipole dipole creates because of the presence of polar compounds and they are responsible for the polarization too and dispersion forces are weak molecular forces of interaction.
H3C•O=(c•CH3 is known as acetone and due to the presence of oxygen they form one polar bond due to the presence of lone pair on the oxygen atom and oxygen is the electronegative element too.
Acetone will form dispersion force as carbon and hydrogen are of similar electronegativities so they are bounded with dispersion force and not very polar.
Therefore, H3C•O=(c•CH3 can interact with other like molecules through only only dispersion forces and dipole dipole forces. option B is correct.
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Please help, I’ll mark your answer as brainliest
Answer:
5.16 gm of SO3 formed with 2 g of S
Explanation:
Mole weight of S in the equation = 2 * 32 = 62 gm
Mole weight os O2 in the equation 6 * 16 =96 gm
From the BALANCED equation the grams of S to O2 is
62 to 96 so 2 g of S will need approx 3 gm of O2
this shows that S is the limiting reactant------>
there will be O left over (approx 1 gram)
SO3 mole weight produced from the equation is 2 (32)(3*16) = 160 gm
62 gm of S produces 160 gm of SO3
62/160 = 2 / x x = 5.16 gm of SO3 are formed
Who is credited with arranging the periodic table?.
Answer
Dmitri Mendeleev Explanation:The modern periodic tables is credited primarily to the russian chemist Dmitri Mendeleev. Mendeleev's table is based on the periodic law, which states that when elements are arranged in order of increasing mass, their properties recur periodically.
Harry uses a sling psychrometer to measure relative humidity near his school. The dry bulb temperature reads 58°F, and the wet bulb reads 45°F. At the same time, his cousin Roberta uses her sling psychrometer to measure the relative humidity near her house. The dry bulb temperature reads 58°F, and the wet bulb reads 50°F. What can you conclude from the values?
A.
The relative humidity is higher at Harry’s school than at Roberta’s house.
B.
The relative humidity is higher at Roberta’s house than at Harry’s school.
C.
The relative humidity is the same at Harry’s school and Roberta’s house.
D.
The relative humidity is 45% at Harry’s school and 50% at Roberta’s house.
Answer:
A.The relative humidity is higher at Harry’s school than at Roberta’s house.
Explanation:
Check using the Relative Humidity Table
Answer:
Option B) The relative humidity is higher at Roberta’s house than at Harry’s school.
Explanation:
got 100% on test
what is the numbe of atoms in oxygen?
Answer:
Two atoms (O2)
Explanation:
Atmospheric oxygen molecule has 2 atoms, which can be easily seen from the oxygen symbol - O2. Here, the molecule has two atoms of oxygen.
what is the freezing point in c of a 1.56m aqueous solution of cacl2? round to 3 decimal places.
Which is composed of aromatic hydrocarbons?
An example of The substance which is composed of aromatic hydrocarbins is : Pain reliever.
Aromatic hydrocarbonsAromatic hydrocarbons are hydrocarbons in nature are composed of 6 rings of carbn atoms ( fused benzene rings ) certain compounds like petroluem contain aromatic hydrocarbons in nature. Certain medical drugs administered are composed of aromatic hydrocarbins an example of such drugs are pain relievers.
Hence we can conclude that the substance which is composed of aromatic hydrocarbons is pain reiever.
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Which of the following increases the rate at which a solute is dissolved by
a solvent?
a.
Keeping the solution completely still.
b. Placing the solution in an ice bath as it forms.
c. Heating the solvent to its boiling point before adding the solute.
d. Leaving the solute in chunks rather than breaking it up before dissolving it. you
about the
experiment (restate your results), and what you learned from completing the experiment.
Answer: C
Explanation:
Increasing the temperature increases the rate of dissolving.
One of the properties that makes copper, Cu, useful for household wiring is its ability to conduct electricity. Which other element is most likely to conduct electricity?
A. Radon, Rn
B. Nitrogen, N
C. Bromine, Br
D. Gold, Au
Answer:D) Gold, Au
Explanation:
Metals are conductive because of their free electrons. Gold is highly conductive.
Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number. Therefore the correct option is option D
What are metals?Metals are those elements which is hard, conduct electricity, ductile, lustrous and malleable. Since metals have free electrons that's why they can conduct electricity
A. Radon, Rn is an radioactive element so it is not metal so it can not conduct electricity
B. Nitrogen, N is an non metals hence it can not conduct electricity
C. Bromine, Br is also non metals so it can not conduct electricity
D. Gold, Au is a metals hence it can conduct electricity
Thus conducting electricity well is the properties of Gold is used in the household wiring. Therefore the correct option is option D
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NEED HELP PLEASE HURRY
Which of the following are decomposition reactions? Select all that apply.
H2CO3 -> CO2 + H2O
CaCO3 -> CaO + CO2
2H2O -> 2H2 + O2
3Mg + N2 -> Mg3N2
2NaCl -> 2Na + Cl2
Answer:
I believe it would be the last 2
Explanation:
the 4th one is magnesium and something else but that's with decomposition and so is the last one. the first three has water and oxygen and stuff that doesn't rly do decomposition
Giving brainliest, please HELP!
Answer:
Third choice
Explanation:
From the graph.....more heat is required to change from Liquid to a gas than is required to change from a solid to a liquid ( see how the flat line portion is longer?)
The heat capacity of an object depends in part on its__
Answer:
It depends on its mass and its chemical composition. Give me Brainiliest
Are two atoms of the same element identical?
Answer:
No It is not
Two of the same atoms are most likely not identical
Ge (g) + 2Cl2 (g) <-> GeCl4 (g)
The value of the equilibrium constant for the reaction represented above is 1 x 10^10. What is the value of the equilibrium constant for the following reaction?
2GeCl4(g) = 2Ge(g) + 4Cl2 (g)
The equilibrium constant gives us an idea of the extent of reaction. For the reaction; 2GeCl4(g) = 2Ge(g) + 4Cl2 (g), the equilibrium constant is 1 * 10^-20.
What is equilibrium constant?The equilibrium constant gives us an idea of the extent of the conversion of reactants to products in a reaction.
In this case, we know that 2GeCl4(g) = 2Ge(g) + 4Cl2 (g) is the reverse of Ge (g) + 2Cl2 (g) <-> GeCl4 (g) hence we only need to invert the value of the equilibrium constant and raise it to power 2 to have 1 * 10^-20.
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Hi!! Please help in any way you can, I’ll give all of the points I have for it ^^
(Showing work is sadly required + needs to include units)
The reactions involved are synthesis, combustion and single replacement reactions and the masses of products formed are dependent on the mole ratio.
What are limiting reactants?Limiting reactants are reactants are reactants that are used in a chemical reaction.
The equation for the production of water is given below:
[tex]2H_2 + O_2 \rightarrow 2H_2O[/tex]
The reaction is a synthesis reaction and the mole ratio of hydrogen to oxygen is 2 : 1.
Moles of 250 g of Hydrogen = 250/2 = 125 moles
Moles of water produced = 125 moles
Mass of water = 125 × 18 = 2250 g
Moles of oxygen in 250 g = 250/32 = 7.81 moles
Moles of water produced = 7.81 × 2 = 15.62
Mass of water produced = 15.62 × 18 = 281.16 g
Since moles of oxygen use is less than the mole ratio of reaction, oxygen is the limiting reactant.
2. The reaction of propane and oxygen is a combustion reaction and is given below:
[tex]C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O[/tex]
1 mole of propane produces 4 moles of water
44 g of propane produces 72 g of water
Mass of propane required to produce 1000 g of water = 1000 × 44/ 72 = 611.1 g of propane
3. The reaction of zinc and hydrochloride acid is a single replacement reaction and the equation is given below:
[tex]Zn + 2HCl \rightarrow ZnCl_2 + H_2[/tex]
1 mole of Zn and 2 moles of HCl are required to produce 1 mole of hydrogen gas
Molar mass of Zn = 65 g
Molar mass of HCl = 36.5
Molar mass of hydrogen = 2.0 g
150 g of Hydrogen gas = 150/2 = 75 moles of hydrogen
Mass of 75 moles of Zn = 75 × 65 = 4875 g
mass of 75 × 2 moles if HCl = 150 × 36.5 =5475 g
Therefore, 4875 g of Zn and 5475 g of HCl are required to produce 150 g of Hydrogen gas.
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in an ion, the number of electrons is _____ to the number of protons
Answer:
more/less depending on if it lost or gained electrons during the ionic bond process
Help I Will Mark Brainlist !! (ATTACHED IMAGE BELOW) Which of the diagrams below would be the FASTEST? _____ Why? Which of the diagrams below would be the SLOWEST? ____ Why?
Answer:
Fastest C. Reaction time is faster
Slowest A. Reaction time is slower and it takes longer to finish
Explanation:
Given that [OH-] = 5.46x10^-9M
find the [H3O+] and state whether the solution is acidic or not and why?
pH:-
14-pOH14-8.265.74It's acidic as pH<7
Now
-log[H+]=5.74log[H+]=-5.74H+=10^{-5.74}H+=1.81×10^-6MAn electrophoretic separation of lactate dehydrogenase isoenzyme that demonstrates elevation in LD-1 greater than LD-2 could be indicative of:
An electrophoretic separation of lactate dehydrogenase isoenzyme that demonstrates elevation in LD-1 greater than LD-2 could be indicative of Hemolysis.
What is Hemolysis?Hemolysis is a process (generally natural process) associated with the elimination of red blood cells.
Hemolysis can be defined as the removal of erythrocytes due to internal or external environmental factors.
Hemolysis can be discovered by analyzing (or counting) the number of certain proteins in plasma.
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how many moles of Al are produced from a reaction using 82 g of Ca?
Answer:
how many moles of Al are produced from a reaction using 82 g of Ca?
Explanation:
How many moles of Fe2O3 will react with 99.0 g of Al? 1.83. 2. Ammonium nitrate decomposes to yield nitrogen gas, water, and oxygen gas in the following ...