Answer:
I believe the answer is B
Explanation:
hope this helps :)
How do you detect which material is going to be positively charged or negatively charged?
plz help
Answer:
If a material gains electrons, its going to be Negatively charged
If a material loses electrons, its gonna be positively charged.
Explanation:
Why?
This is because electrons are negative subatomic particles
Explain how natural resources are identified and why natural resources are unevenly distributed.
Please help me I will write this in my own words and you will be given 20 points ad brainlist also please don't put a super long answer just a small simple paragraph and don't give me a link..
Answer:
Natural resources are naturally formed of course(wood copper fruits) and they are not distributed evenly due to competition of getting them and the prices of the resources
Explanation:
Is this molecule a polar or non polar?
Answer:
This is polar
Explanation:
If the arrows are of different lengths, and if they do not balance each other, the molecule is polar.
If the arrangement is asymmetrical, the molecule is polar.
Hope this helped!!!
Which countries have a Desert biome?
Mexico
China
Ireland
India
Brazil
Saudi Arabia
United States
"Desert biome?" that's a funny way to put it. Well, the answer is most likely Mexico, United Stated, and Saudi arabia,
Mexico, Saudi Arabia and United States are countries which have a desert biome.
What is a Desert?
This is a barren area of landscape which is characterized by little precipitation and isn't best suited for plant or animal life.
Mexico, Saudi Arabia and United States all have the presence of desert biomes in some of its states.
Read more about Desert biome here https://brainly.com/question/3363067
What is the oxidation state of N in NH4?
A. -3
B. +5
C. +1
D. -5
Pedro adds 3.23 moles of helium to a balloon that already contained 4.51 moles of helium creating a balloon with a volume of 9.87 liters. What was the volume of the balloon before the addition of the extra gas?
Answer:
7.The answer is 2.13 because if u add 3.23 and 4.51 and the answer is 7.74 and u add 2.13 to get 9.87. 3.23 + 4.51 + 2.13 is 9.87
Explanation:
How many joules are required to heat 15 grams of ice from -200⁰ to 1400⁰ C?
Answer: A heat energy of 50160 joules are required to heat 15 grams of ice from [tex]-200^{o}C[/tex] to [tex]1400^{o}C[/tex].
Explanation:
Given : mass of ice = 15 g
Convert grams into kg as follows,
[tex]1 g = 0.001 kg\\15 g = 15 g \times \frac{0.001 kg}{1 g}\\= 0.015 kg[/tex]
Initial temperature = [tex]-200^{o}C[/tex]
Final temperature = [tex]1400^{o}C[/tex]
Formula used to calculate the amount of heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat of substance (ice here has C = [tex]2090 J/kg ^{o}C[/tex])
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 0.015 kg \times 2090 J/kg^{o}C \times [1400 - (-200)]^{o}C\\= 50160 J[/tex]
Thus, we can conclude that 50160 joules are required to heat 15 grams of ice from [tex]-200^{o}C[/tex] to [tex]1400^{o}C[/tex].
A 0.45g sample of mineral ore is analyzed for chromium and found to contain 0.560mg Cr2O3. Express the concentration of Cr2O3 in the sample as a.Percent b) parts per thousand (pot) c) parts per million (ppm) d) parts per billion (ppb)
The vat is made of metal. Why would it matter that the material from which the vat is made is metal ?
Answer:
Due its storing and holding ability.
Explanation:
It matter that the material from which the vat is made is metal because this vat is used for storing and holding liquids. Vat is a large container or tank that is used for storing or holding liquids in industrial sector. This vat is made of metal which increases its strength and durability. If the vat is made of wood or plastic so it can't hold huge amount of liquid or chemical due to its weak material so that's why it matters that the substance from which the vat is made is metal or not.
what is potential energy? (person with the right answer will get 5 stars)
Answer:
The energy possessed by a body by the virtue of its position is called potential energy.
Question 1 0 Which of the following numerical expressions gives the number of moles in 5.0 g of CaO?
A) 5.0 g X 56 g/mol
B) 5.0 g / 56 g/mol
C) 56 g/mol / 5.0 g
D) 1/5.0 g X 1/56 g/mol
Answer: A
Explanation:
5.0 g / 56 g/mol is the numerical expression that gives the number of moles in 5.0 g of CaO.
HOW TO FIND NUMBER OF MOLES:
The number of moles in a substance can be calculated by dividing the mass of that substance in grams by its molar mass in grams/moles. Number of moles = mass ÷ molar massIn this question, 5.0g of calcium oxide (CaO) was given. The molar mass of CaO is as follows:CaO = 40g/mol + 16g/mol = 56g/mol
Number of moles = 5.0g ÷ 56g/mol
Therefore, 5.0 g / 56 g/mol is the numerical expression that gives the number of moles in 5.0 g of CaO.
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What is the concentration of each ion in a 0.525 mol/L solution of magnesium chloride?
mg=? cl=?
Answer:
Mg⁺² = 0.525 mol/L
Cl⁻ = 1.05 mol/L
Explanation:
The formula for magnesium chloride is MgCl₂, and in a solution the following process takes place:
MgCl₂ → Mg⁺² + 2Cl⁻By analyzing the stoichiometric coefficients, we can tell that the concentration of Mg⁺² ions is the same as the concentration of MgCl₂, while the Cl⁻ concentration is twice that value.
In other words:
Mg⁺² concentration = MgCl₂ concentration = 0.525 mol/LCl⁻concentration = 2 * MgCl₂ concentration = 1.05 mol/LHow many moles are 4.20 x 1025 atoms of Ca?
Answer:
4305
Explanation:
please mark this answer as brianliest
When the Florida summer brings hot temperatures, what seasonal changes can be seen in plants?
Drag each tile to the correct box
Arrange the steps of the scientific method in the correct order
Ask questions
Test the hypothesis
Observe,
Construct a hypothesis,
Communicate the results
Analyze the results and conclude
Answer:
Ask questions
Construct a hypothesis
Test the hypothesis
Observe
Analyze the results and conclude
Communicate the results
A scuba diver is using scuba gear to breathe under water. The pressure on her lungs is 2.5 atm and her lung volume is 4.4 L. What will happen to the volume of her lungs when the pressure increases to 4.5 atm?
Answer:
2.44 LExplanation:
The volume can be used by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2 \\ [/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we're finding the final volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
We have
[tex]V_2 = \frac{2.5 \times 4.4}{4.5} = \frac{11}{4.5} \\ = 2.444444....[/tex]
We have the final answer as
2.44 LHope this helps you
How does the vapor pressure of mercury affect the pressure reading of the manometer?
what compound is YCI3
Answer:
Yttrium, Carbon, Iodine
Explanation:
Y stands for Yttrium
C stands for Carbon
I stands for Iodine
and 3 stands for 3 Iodine atoms
For the balanced equation shown below, what would be the limiting reagent if 80.2 grams of N2 were reacted
with 399grams of H2O?
N2 +4H20 --> 2H2O2 + N2H4
Kill him or PS5? Which one?
How does the kinetic theory of gases explain the weather changes happening in the troposphere? You can also research on the internet using keywords such as troposphere, atmosphere layers, and weather changes.
Answer: According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often.
Answer:According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often.
Explanation:
A sample of 250 g of water are heated from 40°C to 121°C, calculate the amount of heat energy absorbed.
552,000 Joules
100,416 Joules
638, 555 Joules
73,885 Joules
Answer:
the anwser isn't in the choices
Explanation:
H=MC(change of temp.)
M=mass of water=250g
C=specific heat of water = 4.186 j/g
change in temperature is 121-40= 81
H= 250x4.186x81=84766.5J
At a higher temperature, K = 1.8 × 105. Placing the equilibrium mixture in an ice bath (thus lowering the temperature) will
The question is incomplete, the complete question is;
1. Given: 2A(g) <-> 2B(g) + C(g). At a particular temperature, K = 1.6x104.
At a higher temperature, K = 1.8x10-5. Placing the equilibrium mixture in an ice bath (thus lowering the temperature) will...
cause [A] to increase
cause [B] to increase
gave no effect
cannot be determined
Answer:
cause [B] to increase
Explanation:
We have to have it behind our minds that; for an exothermic reaction, when the temperature is increased, the value of the equilibrium constant decreases. On the other hand, for an endothermic reaction, increasing the temperature increases the value of the equilibrium constant.
In this particular case, increasing the temperature decreased the equilibrium constant from K = 1.6x104 to K = 1.8x10-5 meaning that the equilibrium constant decreased with increase in temperature. This means that the reaction is exothermic and a decrease in temperature will favour the forward reaction hence more B is produced.
A substance conducts electricity because of free moving, charged particles.
what are the free moving charged particles in a :
carbon electrode(made of graphite)
molten mixture of aluminum oxide and cryolite
metal wire?
Answer:
carbon electrode: delocalised electrons
molten mixture....: aluminium oxide ions
metal wire: Metal atoms
The free moving charged particles in the following substances are as follows;
carbon electrode(made of graphite); Delocalized electrons.molten mixture of aluminum oxide and cryolite;. Aluminium ions in Aluminium oxide.Metal wire; Metal ionsGraphite, an allotrope of carbon has Delocalized (free-moving) electrons and these electrons serve to enable conductivity.
Although, cryolite is a bad conductor of electricity, when Molten Aluminium oxide and cryolite is used, the free moving Aluminium ions enable conductivity.
In metal wires, conductivity is solely the responsibility of metal ions.
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https://brainly.com/question/10684339
when discussing Solutions the amount of solute dissolved in the solvent is important to know as it will affect the colligative properties of a solution a pure illusion prepared by dissolving the maximum amount of solute in a given amount of solvent is best described as
I hope it helps
thanks you
Mechanical energy is the sum of two types of energy—kinetic energy and potential energy. Which of the following is an example of an object that has kinetic energy?
Answer:
There is no picture but the one that is in motion in the picture has kinetic energy.
Explanation:
Kinetic energy is the energy of motion.
hope this helped!
Which equation is derived from the combined gas law?
Answer:
First one. V1/T1=V2/T2
If the pressure is the same.
Explanation:
Answer:
A on edge2021
help please!!! no links
What is the percent composition of oxygen in BaCrO4
Answer: The percent is 25.263%
Explanation:
why should a sports person or a rickshaw puller in take more corbohydrate rich food in their diet
Answer:
Because carbohydrates are energy
Explanation:
Carbohydrates is best best nutrient for energy, turning into energy as soon as they are eaten. A rickshaw puller most likely needs quite a bit of energy to pedal all day without getting tired, so that's why they eat a carbohydrate rich diet.
1
An atom with 17 protons, 17 electrons and 18 neutrons has a mass number
of
Answer:
35
Explanation:
mass number = protons in the nucleus + neutrons in the nucleus
17 + 18 = 35, the mass number
Protons and neutrons are together known as nucleons.
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