Answer:
4 Hydrogen atoms
Que uso le darías a la vida diaria escribe en español plis
Explanation:
Facilitar el movimiento y desplazamiento de objetos pesados reduciendo el rose del objeto contra el suelo, Obtener un movimiento circular por efecto de la fuerza de un liquido, en el caso de contadores, molinos, centrales hidroeléctricas y turbinas.
Transmitir el movimiento de un eje a otro como en el caso de las lavadoras, bicicletas y neveras. Reducir drásticamente el esfuerzo necesario para elevar y mover objetos, como en casos de pozos de agua y ascensores Transformar movimientos giratorios en otros movimientos o viceversa. ,
who am I? my number name has the same number of letters as me. I am number _____
Answer:
four
is the answer
THIS IS EASYCan someone please help me with this question.
Answer:
A-Sphalerite + Dioxygen+Zinc Oxide+Sulfur Trioxide
B-Sodium+Magnesium+Sodium iodide
Explanation:
Heyyy love good luck i may be wrong on letter B so if it is thats my bad but A should be correct :)
A solution with a pH of 5.30 has a H+ concentration of
Answer:
5.01 x 10^-6 M
Explanation:
PH= -log [H+]
[H+] = 10^-PH
Which example is the site of oxidation when the dry cell is operating?
solid zinc layer
cardboard separator
graphite rod
paste
A dry cell is one type of electric battery which is generally used for the home and portable electronic devices. A battery is a device which consists of one or more electrochemical cells. The site of oxidation occurs in solid zinc layer. The correct option is A.
What is a dry cell?A dry cell is defined as an electrochemical cell which consists of low moisture immobilized electrolytes in the form of a paste which restricts it from flowing. It is developed by the German scientist Carl Gassner which converts chemical energy into electrical energy.
A dry cell consists of a metal container in which a low moisture electrolyte paste covers the graphite rod or a metal electrode. Generally, the metal container will be zinc whose base perform as the negative electrode (anode).
For a dry cell battery to operate, oxidation will occur from the zinc anode and reduction will take place in the cathode.
Thus the correct option is A.
To know more about dry cell, visit;
https://brainly.com/question/13780178
#SPJ2
What are the components of DNA?
A. ribose sugar, cytosine, guanine, adenine, thymine, and phosphate group
B. ribose sugar, cytosine, guanine, adenine, uracil, and phosphate group
C. deoxyribose sugar, cytosine, guanine, adenine, thymine, and phosphate group
D. deoxyribose sugar, cytosine, guanine, adenine, uracil, and phosphate group
Answer:
C
Explanation:
A-T G-C
Answer:
C
Explanation:
EDGE 2022
There are 6 different organisms in the picture above. Organize them into 2 or more groups AND defend your groups by
providing details about why you put them into the chosen groups.
Example on how to answer:
Group 1- XYZ
Group 2-LM
Group 3- PORS
I put XYZ in group 1 because...
I put LM together because...
I grouped PORS together because...
Explanation: they could be grouped by how they reproduce or they can be grouped by if there hetero or autotrophic
How many moles of nitrogen are required to produce 13.5 g of NH 3?
Answer:
number of moles of (N) = 0.794 moles
Explanation:
From the given information:
no of moles of nitrogen (N) = (unknown)???
mass of nitrogen = 13.5 g
molar mass of NH3 = 14 +( 1 × 3) = 17 g/mol
To calculate the no of moles of N, we have:
number of moles of (N) = mass of N/molar mass
number of moles of (N) = 13.5 g/17 g/mol
number of moles of (N) = 0.794 moles
The sea, on average, has a molarity of 0.599 M NaCl. How many grams of NaCl is this for every 1 liter?
Pls answer
Answer:
it contains 0.599 g i hope it helps
PLEASE HELP, DUE AT 12:00
Uranium is an element with three naturally occurring isotopes: 238U, 235U, and 234U. This means that 238U, which has a mass number of 238 has _______more than 235 u which has a mass number of 235.
Answer:
The correct answer is - neutrons.
Explanation:
Uranium has various isotopes found naturally that are three 238U, 235U, and 234U. Uranium has an atomic number of 92 which means there are 92 protons and 92 electrons in the atomic structure.
Isotopes have the same number of protons but a different number of neutrons that can vary from 141 to 146. U-238 has 146 neutrons in the nucleus, whereas 235 U has 143 neutrons.
The U- 238 has more neutrons than U- 235. Atomic mass is the sum total of the nucleons or protons and neutrons.
What are Isotopes?
They are the different variants of the same molecules which have the same number of protons but the different number of neutrons.
Atomic mass is the sum total of the nucleons or protons and neutrons. The atomic number of Uranium is 92, the rest of the mass comes from neutrons.
Therefore, the U- 238 has more neutrons than U- 235.
Learn more about Isotopes:
https://brainly.com/question/9099776
Which statement describes the atoms in an element
Answer:
Atoms are kind of like building blocks.
Explanation:
Think of atoms as kind of like a mix between paint pigments and legos. The more legos that you have, the bigger the molecule but keep in mind that there are many different kinds of legos that all can come together to build numerous things. I hope that I answered your question and i apoligize if I didn't.
Name one trend observable in a periodic table
Answer:
Major periodic trends include: electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character.
Explanation:
These six are the major trends.
The blank
and
blank
of atoms are the same on both sides of
a chemical equation.
Please just answer the question directly instead of giving me some weird cryptic answer that I can’t use. I’ve seen this exact question answered before and nobody would give a straight answer.
Do frogs start their life cycle on land or water?
The answer is water because they lay eggs in water
Suppose you have a solution that might contain any or all of the following cations: Cu 2, Ag , Ba 2, and Mn2 . The addition of HBr causes a precipitate to form. After the precipitate is filtered off, H2SO4 is added to the supernate, and another precipitate forms. This precipitate is filtered off, and a solution of NaOH is added to the supernatant liquid until it is strongly alkaline. No precipitate is formed. Which ions are present in each of the precipitates
Answer:
Ag⁺, Ba²⁺,
Explanation:
We can solve this question using the solubility rules:
When an Halide as Br- is added to a solution, the ions that can be precipitate are Ag⁺, Hg₂²⁺ and Pb²⁺.
That means the first ion present is Ag⁺
When sulfates, SO₄²⁻ are added, the ions that precipitates are: Ag⁺, Ca²⁺, Sr²⁺, Ba²⁺, Hg₂²⁺ and Pb²⁺
The second ion present is Ba²⁺
Hydroxides of Cu²⁺ and Mn²⁺ are insolubles but as no precipitate are formed when the solution is strongly alkaline those ions are not present.
When looking across the periodic table from left to right, which of these groups are the first to contain nonmetals?
group 2
group 7
group 14
group 18
Answer:
The first group to contain a non-metal is Group 18.
Why are fossil fuels considered nonrenewable resources?
Answer:
They are considered nonrenewable because they are prehistoric animals that has been extinct therefore can't be renew.
When water is boiling in a pot, heat energy is being transferred throughout the water by which type of heat transfer?
O Convection
O Conduction
O Radiation
Answer:
it would be Convection.
4. Which of the following process is NOT part of wool extraction?
(a) Shearing (b) Scouring (c) Sorting
(d) Reeling
Answer:
Reeling is the only process not listed.
The correct answer is option D: Reeling.
Wool is obtained from sheep. The wool so obtained is processed according to the following flow chart;
Shearing → Scouring → Sorting → Dyeing → Straightening, Rolling and Combing
Shearing is the removal of the fleece and thin skin of the sheep. Scouring is the process of washing the hair to remove grease, dust, and dirt. Sorting is the process of differentiating the fibers.
Hence, reeling is not a process in wool extraction.
https://brainly.com/question/9968125
How many grams of carbon dioxide will be produced if 76.4 grams of
C2H3Br3 reacted with 49.1 grams of O2? How many grams of the
excess reactant will be left after the reaction is over? Consider the
equation: C2H3Br3+O2 -> CO2+H2O+Br2
Answer:
Assuming that all of the oxygen is used up, 1.53×4111.53×411 or 0.556 moles of C2H3Br3 are required. Because there are only 0.286 moles of C2H3Br3 available, C2H3Br3 is the limiting reagent.
Limiting Reagent What is the limiting reagent if 76.4 grams of C2H3Br3 were reacted with 49.1 grams of O2? C2H3Br3 + 11O2 → 8CO2 + 6H2O + 6Br2 SOLUTION Using Approach 1: A. 76.4g × (1 mol/ 266.72 g) = 0.286 moles C2H3Br3 49.1g × (1 mole/ 32 g) = 1.53 moles O2 B.
Explanation:
MRK ME BRAINLIEST PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Map%3A_Introductory_Chemistry_(Tro)/08%3A_Quantities_in_Chemical_Reactions/8.04%3A_Limiting_Reactant_and_Theoretical_Yield
Learn more about
https://brainly.com/question/20454467
(NH4)2Cr2O7 Cr2O3 + N2 + H2O
If 4.7369 moles of H2O are produced, how many moles of (NH4)2Cr2O7 were reacted?
Answer:
the original substances in any chemical reaction. products. the resulting substances in any....chromium(III) oxide, and water. (NH4)2Cr2O7(s) → N2(g) + Cr2O3(s) + 4H2O(g).
ibigay ang kahulugan nito ayun sa paliliwanag
konduktor piloto drayber makinista
Answer:
konduktor
- ang konduktor ay maaaring isang konduktor nga koryente, train o isang taong namumuno sa isang orkestra o isang grupo ng mga mang-aawit.
piloto
-isang tao na tagalipad ng ereplano
drayber
- isang tao na nagmamaniho ng sasakyan
makinista
-ay isang tao na nagpapakilos o nagpapagana ng makina
please give me brainliest.
Question 2 (1 point)
An object's gravitational force depends primarily on the object's
a
density
mass
b
oc
momentum
Answer: An object's gravitational force depends primarily on the object's mass.
Explanation:
According to the Universal law of gravitation, every object whether is it is having large r small mass tends to exert a force on every other object, therefore this force is known as gravitational force.
Formula to calculate gravitational force is as follows.
[tex]F = \frac{G \times m_{1} \times m_{2}}{r^{2}}[/tex]
where,
F = Gravitational force
G = Gravitational constant = [tex]6.674 \times 10^{-11} m^{3}/kg s^{2}[/tex]
[tex]m_{1}[/tex] = mass of object 1
[tex]m_{2}[/tex] = mass of object 2
r = distance between the centers of the objects
Therefore, it means that gravitational force of an object primarily depends on an object's mass.
Thus, we can conclude that an object's gravitational force depends primarily on the object's mass.
Which of the following is NOT an indication that a chemical reaction has taken place?
Answer:
WHERE ARE THE CHOICES?
PLEASE MAKE SURE THAT YOUR QUESTION IS RIGHT BEFORE POSTING IT シ︎
Change of state of matter is not an indication that a chemical change has taken place.
What is matter?Matter is a substance which is made up of various types of particles which occupy space and have inertia . All living things and objects are made up of various types of particles that occupy space and have inertia .
Depending on temperature and other factors matter is able to exist in different phases. Most common of which are solid, liquid and gas. Matter can exist in more than one state depending on the temperature and pressure .
State of matter can be changed by heating or cooling and even by changing the applied pressure.When a state changes matter does not break rather its state changes though its chemical composition remains same.
Physical characteristics of matter are shape, color, size and temperature. Every matter is made up of elements which cannot be broken down further by ordinary chemical reactions.
Learn more about matter,here:
https://brainly.com/question/12972782
#SPJ6
Calculate the pressure of 2.50 Liters of a gas at 25.0oC if it has a volume of 4.50 Liters at
STP.
Answer:
P_2 =0.51 atm
Explanation:
Given that:
Volume (V1) = 2.50 L
Temperature (T1) = 298 K
Volume (V2) = 4.50 L
at standard temperature and pressure;
Pressure (P1) = 1 atm
Temperature (T2) = 273 K
Pressure P2 = ??
Using combined gas law:
[tex]\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2} \\ \\ \dfrac{1 *2.5}{298} = \dfrac{P_2*4.5}{273}[/tex]
[tex]0.008389261745 \times 273 = 4.5P_2[/tex]
[tex]P_2 =\dfrac{0.008389261745 \times 273 }{4.5}[/tex]
[tex]P_2 =0.51 \ atm[/tex]
PLZ ANSWER QUICK I AM IN TIMER HELP WILL GIVE BRAINLIEST
Which is greater, the moon's period of rotation or its period of revolution?
They are equal.
the moon's revolution period around Earth
Neither are known.
the moon's rotational period
Answer:
B
Explanation:
QA49 (N13/13/Q9)
Use of the Data Booklet is relevant to this question.
When an evacuated fluorescent light tube of volume 300 cm^3 is filled with a gas at 300K and
101 kPa, the mass of the tube increases by 1.02g. The gas obeys the ideal gas equation
What is the identity of the gas?
A argon
B krypton
C neon
D nitrogen
7. What is the mass of a piece of copper (Cu) that undergoes a 25.0 °C
temperature change with the loss of 428 J of energy?
Answer:
0.0428 kg or 42.8 g
Explanation:
Applying,
Q = cmΔt.............. Equation 1
Where Q = heat lost of heat gained, c = specific heat capacity of copper, m = mass of copper, Δt = temperature change.
make m the subject of the equation above
m = Q/cΔt.................. Equation 2
From the question,
Given: Q = 428 J, Δt = 25 °C
Constant: c = 400 J/kg.°C
Substitute these values into equation 2
m = 428/(25×400)
m = 0.0428 kg
m = 42.8 g
How to solve for K when given your anode and cathode equations and voltage
Answer:
See Explanation
Explanation:
In thermodynamics theory the Free Energy (ΔG) of a chemical system is described by the expression ΔG = ΔG° + RTlnQ. When chemical system is at equilibrium ΔG = 0. Substituting into the system expression gives ...
0 = ΔG° + RTlnKc, which rearranges to ΔG° = - RTlnKc. ΔG° in electrochemical terms gives ΔG° = - nFE°, where n = charge transfer, F = Faraday Constant = 96,500 amp·sec and E° = Standard Reduction Potential of the electrochemical system of interest.
Substituting into the ΔG° expression above gives
-nFE°(cell) = -RTlnKc => E°(cell) = (-RT/-nF)lnKc = (2.303·R·T/n·F)logKc
=> E°(cell) = (0.0592/n)logKc = E°(Reduction) - E°(Oxidation)
Application example:
Calculate the Kc value for a Zinc/Copper electrochemical cell.
Zn° => Zn⁺² + 2e⁻ ; E°(Zn) = -0.76 volt
Cu° => Cu⁺² + 2e⁻ ; E°(Cu) = 0.34 volt
By natural process, charge transfer occurs from the more negative reduction potential to the more positive reduction potential.
That is,
Zn° => Zn⁺² + 2e⁻ (Oxidation Rxn)
Cu⁺² + 2e⁻ => Cu° (Reduction Rxn)
E°(Zn/Cu) = (0.0592/n)logKc
= (0.0592/2)logKc = E°(Cu) - E°(Zn) = 0.34v - (-0.76v) = 1.10v
=> logKc = 2(1.10)/0.0592 = 37.2
=> Kc = 10³⁷°² = 1.45 x 10³⁷