What is the charge of an electron?
Answers
Related Questions
PLEASE HELP!! ILL MARK BRAINLIST!!
Answers
Which of the following is not a form of precipitation?
A
groundwater
B
balls of hail
C
sleet
D
snowflakes
Answers
A.
Reason: cuz i need points noob
What is one factor of how species are distributed on the Earth's continents?
Answers
Answer:
The most apparent general environmental factor affecting the distribution of a species is climate. Suitable conditions of temperature and moisture are vital to all organisms. Certain species are intolerant of cold; other species cannot live in warm climates.
5. Solve the following crossword puzzle.
a. Maximum energy generation in India is done using ........ energy.
b. energy is a renewablesource of
energy.
c.Solar energy can be called.... energy.
e. ......... energy of water in dams is used for generation of electricity.
Answers
Answer:
I think it is b
Explanation:
what is a similar math problem to the calcium and water equation
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Answer: Calcium is a metal and a typical reaction of a metal with water will be as follows: ... the chemical reaction for calcium and water will be: [Word Equation] Calcium + 48.
Explanation: Please Please mark me as brainliest!
PLEASE HELP ILL EVEN MARK AS BRAINLIEST
Answers
Answer:
Cl: -29.272*
Explanation:
The other temperatures go from lowest to highest, H: -423* F, N: -320* F, F: -306.6* F
help I'm giving you a lot of points and do not put random or crazy stuff the real question
You are trying to design a homemade ice pack. As you select the chemicals for this reaction, should you choose an endothermic reaction or an exothermic reaction? Why?
Answers
Answer:
Endothermic
Explanation:
Because Endothermic is cold and exothermic is hot and if you are using an ice pack it would be Endothermic and if you were using something that was hot it would be exothermic
in the reaction A+B = C+D if B is the excess what is the limiting reactant
Answers
Explanation:
Determining the Limiting Reagent
One reactant (A) is chosen, and the balanced chemical equation is used to determine the amount of the other reactant (B) necessary to react with A. If the amount of B actually present exceeds the amount required, then B is in excess, and A is the limiting reagent.
An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its
mass
Answers
step by step explanation:
D= M/V
M= DV
M= (13.6 g/cm^3) (825cm^3)
M= 11,200 g
The mass of an object is the product of its volume and density. The mass of a the object with a volume of 825 cm³ and a density of 13.6 g/cm³ is 11220 g.
What is density ?Density of substance is the measure of its mass per unit volume. It describes how closely its particles are packed. Density depends on the bond type, temperature and pressure.
Volume of the object is the space occupied by its particles. Volume can be expressed in L, ml, cm³, dm³ etc. Only solids and liquids has a definite volume and the volume of gases is that of the container.
Give that, volume of the object = 825 cm³
density = 13.6 g/cm³
Mass = volume × density
m = 825 cm³ × 13.6 g/cm³ = 11220 g
Therefore, the mass of the object is 11220 g.
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Which statement correctly compares electric charge with electric current?
A.
They both require a human to make them.
B. Neither require charged particles.
C. They both require a battery and a bulb
D. They both require a movement of charged particles.
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Answer:
Your answer would be D) They both require a movement of charged particles
Explanation:
In short terms both the charge and the current are made up of charged particles that are always moving, they constantly move to well... stay charged, if they stopped, then the charge would fade until there is nothing left, and if there is nothing left -it means there would be no electricity to use
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What is the volume of a 492.2g sample of Kr gas?
0.007601 L
131.6 L
5.870 L
21.97 L
Answers
Answer:
131.6 L
Explanation:
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the correct option is option B that is 131.5l. There is no force of attraction between the particles.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Ideal gas is a hypothetical gas. Vanderwaal behave as ideal gas at high temperature and low pressure.
Mathematically,
PV=nRT
where,
P = pressure=1 atm
V= volume=?
n =number of moles=given mass/ molar mass
= 492.2/ 83.79
= 5.87 moles
T =temperature = 273K
R = Gas constant = 0.0821 L.atm/K.mol
1× V = 5.87 × 0.0821 L.atm/K.mol × 273 K
V =131.5l
131.5l is the volume of a 492.2g sample of Kr gas.
Therefore, the correct option is option B that is 131.5l.
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PLEASE HELP!!!
True or False: Density is the property of a substance that describes how much mass of a substance is contained in the given weight of the substance.
A simple true or false please!
Answers
Answer:
False
Infered from the equation:
Density=[tex]\frac{Mass}{Volume}[/tex]
So it has no relation with weight of substance
What chemical compound is H4PN?
Answers
Answer:
Diphosphane
Explanation:
Hope it helps
A gas has a volume of 250.0 liters at 17.0 °C and 3.00 atm of pressure. what volume must the gas be increased for the gas to be at STP conditions?
Answers
Answer:
0.706 L (Liters)
Explanation:
P1V1 = P2 V2 3 atm 250.0 mL = 1 atm X
T1 T2 290 K 273 K
706 mL = X
According to the question,
Pressure,
Initial, [tex]P_1 = 3 \ atm[/tex]Final, [tex]P_2 = 1 \ atm[/tex]Temperature,
Initial, [tex]T_1 = 17^{\circ} C[/tex] or, [tex]290 \ K[/tex]Final, [tex]T_2 = 273 \ K[/tex]Volume,
Initial, [tex]V_1 = 250 \ L[/tex]Final, [tex]V_2 = \ ?[/tex]By using the Boyl's and Charl's combination law, we get
→ [tex]\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}[/tex]
or,
→ [tex]V_2 = \frac{P_1 V_1 T_2}{T_1 P_2}[/tex]
By putting the values, we get
→ [tex]= \frac{3\times 250\times 273}{290\times 1}[/tex]
→ [tex]= 706 \ L[/tex]
Thus the aforementioned answer is right.
Learn more about pressure here:
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Think of a substance that does not dissolve in water. Any Examples?
Answers
Answer:
sand, flour, water
Explanation:
Some substances that don't dissolve in water:
- sand
-flour
-oil
-fats
-plastics
How do you shift realities?
I’ve been trying for weeks now
Answers
Answer:
1. learn how to script
2. be in a good state of mind
3. drink water water warer
4.search for yt tutorials
Explanation:
Put the following metals in order of reactivity.
Iron, potassium, copper, zinc, lead, calcium, magnesium, sodium, gold
Most reactive
Least reactive
Complete the equations
metal + oxygen → …………………….
metal + water → ……………………. + …………………….
metal + acid → ……………………. + …………………….
What is formed when magnesium burns in air?
…………………….…………………….…………………….…………………….
What happens when copper is put into a beaker of water?
…………………….…………………….…………………….…………………….
How do you test for hydrogen gas?
…………………….…………………….…………………….…………………….
What is formed when sodium reacts with hydrochloric acid?
…………………….…………………….…………………….…………………….
How should metals more reactive than carbon be extracted from their ores?
…………………….…………………….…………………….…………………….
Why is gold used in jewelry?
…………………….…………………….…………………….…………………….
What is the rule for displacement reactions?
…………………….…………………….…………………….…………………….
Tick which reactions would happen
copper
Magnesium
zinc
copper sulfate
Magnesium
sulfate
Zinc Sulfate
Using the reactions from Q10. Choose 1 reaction you’ve ticked and explain why it happens. Choose 1 reaction you haven’t ticked and explain why it doesn’t happen.
…………………….…………………….…………………….…………………….
…………………….…………………….…………………….…………………….
…………………….…………………….…………………….…………………….
…………………….…………………….…………………….…………………….
Write word and symbol equations for the first reaction from Q11.
…………………….…………………….…………………….…………………….
…………………….…………………….…………………….…………………….
Answers
Answer: copper, zinc, lead, magnesium, potassium, sodium, iron, gold.
Explanation:
Bill stands in a swimming pool and notices that the water around his feet is a lot cooler than the water near the surface which process causes this difference in temperature?
1. convection
2. evaporation
3. radiation
4. conduction
Submit Answer
Answers
Answer:
convection
Explanation:
At what temperature will 41.6 grams of nitrogen gas (N2) exert a pressure of 1 point
1.07 atm in a 20.0 L cylinder?
Answers
Answer:
The temp is 176k
Explanation:
4 In which medium would an electromagnetic
wave travel the fastest?
A. air
C. vacuum
B. granite
D. water
Answers
Answer:
the correct answer is air.
Answer:
water
Explanation:
the medium an electromagnetic wave travel the fastest is in water
Atmosphere
B
Ocean
Land
с
Which arrow or arrows represents a change of state from a liquid to a gas caused by the
sun's energy?
A. arrow A
B. arrow B
C. arrow A and arrow B
D. arrow B and arrow C
Answers
Complete the following equations (note that the equations are not balanced). Use the activity series if necessary. Li >>Ba > Sr> Ca > Na > Mg > AI > Mn> Zn > Cr> Fe > Cd > Co > Ni > Sn > Pb>H> Sb> Bi > Cu > Ag > Pd > Hg > Pt > Au Na+Cl2 → ?
- NaCl
- NaCl2
- Na2Cl
Answers
Answer:
its C
Explanation:
Answer: NaCl
Explanation:
Na+ Cl2 ----> NaCl
What did Antoine Lavoisier’s experiments demonstrate?
A. Atoms always split into pairs during a chemical change.
B. Mass is neither lost nor gained during a chemical change.
C. Matter can be created during a chemical change.
D. Energy is neither lost nor gained during a chemical change.
Answers
How many atoms are there in 3.3 moles of strontium?
Answers
Explanation:
Multiply the moles Fe by 6.022×1023 atoms/mol
Hi! My responsibility is to add and protection to plant cells. what i am
Answers
In the laboratory you dissolve 12.7 g of silver fluoride in a volumetric flask and add water to a total volume of 125. mL. What is the molarity of the solution?
Answers
Answer:
Molarity = 2.4 M
Explanation:
Given data:
Mass of silver fluoride = 12.7 g
Volume of water = 125 mL (125 mL× 1 L /1000 mL = 0.125 L)
Molarity of solution = ?
Solution:
Number of moles of silver fluoride:
Number of moles = mass/molar mass
Number of moles = 12.7 g/ 41.98 g/mol
Number of moles = 0.30 mol
Molarity:
Molarity = number of moles of solute / volume in L
Molarity = 0.30 mol / 0.125 L
Molarity = 2.4 M
What is genetic variation?
Answers
please help PLSSSS
2020020200
Answers
Answer:Well the water molecules attract each other, and the oil molecules stick together.
sorry number two im not sure sorry:(
Explanation:
I NEED HELP ASAP !
1. How many molecules are in 643.21 grams of
Mg3(PO4)22
2. How much space (Liters) does 4.061 x 10-24
molecules of H202 take up?
3. How many H20 atoms are in 479.3 grams of
H20 gas?
4. How many grams does 80.34 L of Ca(NO3)2
weigh?
5. How many Liters of space does 893.7 grams
of CO2 take up?
6. How many grams are in 5139 x10425
molecules of Al(OH)3
Answers
Answer:
1.
643.21g 1 mol 6.022^23
262.87 g 1 mol
= 1.4735E24 [Mg3(PO4)2]
2.
4.061x10^24 1mol 22.4 (L)
6.022^23 1mol
= 151 liters H2O2
3.
479.3g 1 mol 6.022^23
18.02g 1mol
= 1.60E25 H20 atoms
4.
80.34L 1mol 164.1
22.4L 1mol
588.6g Ca(NO3)2
5.
893.7g 1mol 22.4
44.01g 1mol
= 427 L CO2 or 427.4
6.
5.39 x 10^25 1mol 78.01
6.022^23 1mol
= 6980g Al(OH)3
hope this helps!! :)
4. What is the correct surface areas for a 45nm
wide cube?
Answers
Answer:
A = 12150 nm²
Explanation:
The side of a cube, a = 45 nm
We need to find the surface area of the cube.
The formula for the surface area of a cube is given by :
A = 6a²
Substituting the value of a in the above formula.
A = 6(45)²
= 12150 nm²
So, the surface area of the cube is 12150 nm²