Answer:
The attractive force between the electrons and the nucleus is called the electric force.
Explanation:
Answer:
Electric force
Explanation:
The attractive force between the electrons and the nucleus is called the electric force.Experiments have shown that the electric force between two objects is proportional to the inverse square of the distance between the two objects.
How heavy is 5 moles of silver in grams?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Silver, or 107.8682 grams.
Explanation:
I took a test about this :)
Water evaporates from oceans, lakes, streams, plants and even soil.
TRUE or FALSE
Answer:
True
Explanation:
What is the percent composition by mass of each element in Co(HSO4)2?
Show how you worked out the problem!!!!
______________% Co
_______________% H
----------------------------% O
------------------------------% S
Answer:
CoHOS
Explanation:
______________% Co
_______________% H
----------------------------% O
------------------------------% S
You know im wrong but eh....
. Which of the following is not a product of photosynthesis?
O A. Carbon dioxide
O B. Glucose
O C. Oxygen
Answer:
The answer would be a
Explanation:
That is what goes into the plant and oxygen IS an outcome
Which of the following characteristics can be used to classify an organism into a taxonomic domain? Being heterotrophic or autotrophic O Presence of nucleus in cells Being unicellular or multicellular O Mode of reproduction
Answer:
O Presence of nucleus in cells
Explanation:
The teacher puts you in charge of measuring the pH of a marked solution of 0.0050 M HCL. What is the pH of this
solution?
HELP PLZZZ!!!
Answer: The pH of given solution is 2.3
Explanation:
It is given that the concentration of HCl solution is 0.005 M.
pH is the negative logarithm of concentration of hydrogen ions.
[tex]pH = -log [H^{+}][/tex]
Substitute values into the above formula as follows.
[tex]pH = -log [H^{+}]\\= - log (0.005)\\= 2.3[/tex]
Thus, we can conclude that the pH of given solution is 2.3
The same amount of heat is added to a 10-g sample of each of the following metals. If each metal is initially at 20.0°C, which metal will reach the highest temperature? show your work
A. gold 0.129 J/(g °C)
B. beryllium 1.82 J/(g °C)
C. calcium 0.653 J/(g °C)
D. copper 0.385 J/(g °C)
Answer: A
Explanation:
A
Heat is the product of the mass, specific heat, and delta temperature. The gold metal will reach the highest temperature. Thus, option A is correct.
What is specific heat?Specific heat (c) is the heat required by a substance to get heated a unit mass by a unit of temperature. The specific heat is given as,
[tex]\rm c = \rm \dfrac{Q}{m \times \Delta T}[/tex]
Here, Q is the heat applied, m is the sample's mass and delta T is the change in the temperature.
The value of heat applied is the same for all the metals, so a change in temperature is calculated as,
[tex]\rm \Delta T = \rm \dfrac{Q}{c . m }[/tex]
From this, it can be said that the temperature is inversely related to the specific heat of the metal and hence the metal having the smallest c will have the highest change in the temperature.
Therefore, gold (c = 0.129 J/(g°C)) will reach the highest temperature.
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Which illustration represents a sound wave?
A or B
no link or i will report,plz help this is a test
What is the IUPAC name for Ester with 9 carbon atoms ?
Explanation:
[tex]CH _{3}CH _{2}COOCH _{2} CH _{2}CH _{2}CH _{2}CH _{2}CH _{3}[/tex]
NAME: Hexylpropenoate
Which statements explain the relationship between mass, velocity and kinetic energy? Select the TWO (2) that apply.
Consider the equation to calculate kinetic energy: KE = ½mv2
Kinetic energy decreases if either the mass or the velocity of the object decreases or if both decrease.
Kinetic energy decreases if either the mass or the velocity of the object increases or if both increase.
Kinetic energy increases if either the mass or the velocity of the object decreases or if both decrease.
Kinetic energy increases if either the mass or the velocity of the object increases or if both increase.
Answer:
I think D
Explanation:
Kinetic energy has a direct relationship with mass, meaning as mass increases so does the kinetic Energy of an object.
A sample of gas occupies a volume of 27 mL at a temperature of 161K. What is the volume of the temperature if raised to 343K?
Answer: The volume is 57.52 mL if the temperature if raised to 343K.
Explanation:
Given: [tex]V_{1}[/tex] = 27 mL, [tex]T_{1}[/tex] = 161 K
[tex]V_{2}[/tex] = ?, [tex]T_{2}[/tex] = 343 K
According to Charles law, at constant pressure the volume of an ideal gas is directly proportional to temperature.
Formula used is as follows.
[tex]\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{27 mL}{161 K} = \frac{V_{2}}{343 K}\\V_{2} = 57.52 mL[/tex]
Thus, we can conclude that volume is 57.52 mL if the temperature if raised to 343K.
Calculate the [H+], pOH, and [OH-] for the following solutions: SHOW WORK And put Answers for concentration[ ] in scientific notation. ( see video for help)
pH 2.90 (the approximate pH of lemon juice
pH 3.86 (the approximate pH of sauerkraut)
pH 10.81 (the approximate pH of milk of magnesia)
pH 4.11 (the approximate pH of orange juice)
pH 11.61 (the approximate pH of household ammonia)
The pH of human blood ranges from 7.35 to 7.45 with it usually being around 7.40. If the blood pH gets below 7.35 a person goes into acidosis. If the pH gets above 7.45 a person goes into alkalosis. Both acidosis and alkalosis can be fatal. How much more acidic is a person’s blood if it has a pH of 7.3 compared to its preferred 7.4? How much more alkaline is a person’s blood if it has a pH of 7.6 rather than its preferred 7.4?
Answer:
Explanation:
pH = -log{H+]
{H+} = 10^(-pH)
pOH = 14 - pH
{OH-} = 10^(-pOH)
pH 2.90 (the approximate pH of lemon juice
{H+} = 10^(-2.9)
pOH = 14 - 2.9 = 11.1
{OH-} = 10^(-pOH) = 10^(-11.1)
pH 3.86 (the approximate pH of sauerkraut)
{H+} = 10^(-3.86)
pOH = 14 - 3.86 = 10.14
{OH-} = 10^(-pOH) = 10^(-10.14)
pH 10.81 (the approximate pH of milk of magnesia)
{H+} = 10^(-10.81)
pOH = 14 - 10.81 = 3.19
{OH-} = 10^(-pOH) = 10^(-3.19)
pH 4.11 (the approximate pH of orange juice)
{H+} = 10^(-4.11)
pOH = 14 - 4.11 = 9.89
{OH-} = 10^(-pOH) = 10^(-9.89)
pH 11.61 (the approximate pH of household ammonia)
{H+} = 10^(-11.61)
pOH = 14 - 11.61 = 2.39
{OH-} = 10^(-pOH) = 10^(-2.39)
plz help me get it right no links
Answer:
D
Explanation:
earth orbits the sun. the sun doesn’t orbit around earth. and moon take 27 days around the earth
Reaccion de obtencion del oxido correspondiente al elemento quimico Z= 19. Balancea la reaccion y nombra los reactivos y el producto formado
Answer:
4K + O₂ → 2K₂O
Los reactivos son: Potasio, Oxígeno, y óxido de potasio
Explanation:
El elemento químico número 19 es el potasio, un metal alcalino (Los metales alcalinos tienen estado de oxidación +1).
El óxido correspondiente debe tener fórmula K₂O (Oxígeno con carga -2 y 2 átomos de potasio con carga +1 dan el óxido neutro). La reacción es:
4K + O₂ → 2K₂OLos reactivos son: Potasio, Oxígeno, y óxido de potasioPLEASE ANSWER ASAP!
The number placed in front of a formula is called a coefficient. The small number within a chemical formula is called a subscript. Why do we adjust coefficients when balancing chemical equations and not subscripts?
[tex]\huge \boxed{\mathcal {\gray { A nswer :}}}[/tex]
While balancing the chemical equations, the sub scripts aren't changed because by changing sub script we actually change the compound formed, hence coefficients are changed so the compound remains the same.
for example : ( for understanding )
in balancing the given reaction,
H2 + O2 =》H2O
if we change Oxygen's sub script in " H2O "
we get,
H2O + O2 =》H2O2
but here the compound formed isn't water, it is "H2O2" (hydrogen peroxide), so we can't change the sub script.
but by changing the coefficient, we get :
2 H2 + O2 =》2 H2O
A. On what continent would you find each of the following locations?
1. 60°N, 100°W
2. 60°N, 100°E
3. 20°S, 60°W
4. 20°N, 20°E
5. 20°S, 140°E
B. Identify the city that lies closest to each pair of coordinates.
6. 30°N, 90°W
7. 30°N, 30°E
8. 60°N, 30°E
C. Give the coordinates for each city.
9. Shanghai, China
10. Durban, South Africa
D. Identify the city with each pair of coordinates.
11. 0°, 78°W
12. 51°N, 0°
13. 38°S, 145°E
E. Estimate the coordinates for each city to the nearest degree.
14. Nairobi, Kenya
15. New York, New York
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Answer:
Durban, South AfricaExplanation:
please mark as brain and like please
Question 1 of 10
Which two factors affect the amount of thermal energy an object has?
A. The directions in which its particles are moving
B. The mass of the object
O C. The amount of motion its particles have
D. The amount of space between its particles
Answer:
b, and d
Explanation:
because it makes the most sense I might be wrong
Help me get it right and no links
Answer:sorry
Explanation:
Answer:
C
Explanation:
C, because unlike A and B, it's an improvement in human population. And D wouldn't really be classified as an improvement as it states "Population has not decreased or increased significantly."
Help me please!!!!!!!!
Answer:
4.00
Explanation:
how does lactic acid make milk sour?
Answer:
but you should
Explanation:
but you should
Carnegie Development stages
Answer:
Stage 1: 1 days.
Stage 2: 2-3 days.
Stage 3: 4-5 days.
Stage 4: 6 days.
Stage 5 (a-c): 7-12 days.
Stage 6: c. 17 days.
Stage 7: c. 19 days.
Stage 8: c. 23 days.
When water changes from gas to liquid, the: color of the water remains the same volume of the water remains the same mass of the water remains the same
Answer:
color of water remains same
Which is the coefficient in this compound?
4CO2
Answer:
the answer is
Explanation:
number of mollecoles
In chemistry a coefficient denotes the number that is seen in front of the formula of a equation. The coefficient in the given equation 4CO₂ is 4.
What is a coefficient?A number which precedes the formulas of reactants and products in order to balance a chemical equation is defined as a coefficient. It represents the number of atoms or molecules of each elements which are present in the reaction.
A chemical equation should be balanced and it must obey the law of conservation of mass which states that the number of reactants and products on both sides of the equation should be equal.
The coefficients are the numbers which are required to balance a chemical equation and it may vary while balancing a equation. The coefficient is found to be 1 if no number is mentioned in front of the formula of the reactants and products.
In the given equation 4CO₂, 4 is the coefficient which shows that 4 'C' atoms and 8 'O' atoms are present in the compound CO₂.
Thus the coefficient in the compound 4CO₂ is 4.
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PLEASE HELP! NO LINKS! CHEMISTRY!
Solution A has a pH of 2.0. Solution B has a pH of 5.0. Which solution is more acidic? Based on the H+ ion concentrations in the two solutions, how many times more acidic?
Answer:
Solution A is 1,000 times more acidic than Sol. B
Explanation:
for pH values we use scientific notation:
-log10 c (where c is the hydrogen ion concentration) is used to notate pH value (think of it as a unit)
ie:
10^-2 is sol A 10^-5 is sol B
5-2 is 3
10^-3 = 1000
there's a diff of 1,000 between the solutions.
The acidity or alkalinity of a solution depends on the hydronium ion concentration and hydroxide ion concentration. Here the solution A of pH 2.0 is more acidic than the solution of pH 5.0.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. When the pH of the solution is less than 7 it is acidic whereas when pH is greater than 7, it will be basic.
The pH of the solution is calculated by the equation:
pH = - log [H₃O⁺]
Then the concentration of H₃O⁺ is:
[H₃O⁺] = 10⁻pH
At pH = 2.0, [H₃O⁺] = 10⁻² = 0.01
At pH = 5.0, [H₃O⁺] = 10⁻⁵ = 0.00001
Thus here the Solution A is 1,000 times more acidic than Solution B.
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What kind of changes contribute to spontaneity?
A. Reduced randomness
B. An increase in entropy
C. An increase in enthalpy
D. Absorbed heat in a reaction
Answer:
An increase in entropy
Explanation:
Doing the same question hope this helps
Why are models used to represent atoms?
O A. Atoms are too small to see.
O B. Models are completely accurate.
O C. Models explain new evidence.
O D. Models never change over time.
Define ductility.
Ty!!
Explanation:
Ductility is the ability of a material to be drawn or plastically deformed without fracture. It is therefore an indication of how ‘soft’ or malleable the material is. The ductility of steels varies depending on the types and levels of alloying elements present. An increase in carbon, for example, will increase the strength but decrease the ductility.
Answer:
ductility of a metal able to be drawn out into a long thin wire.
How many atoms in 13.88 mole of lead? (Round to 3 sig figs)
Answer:
8.36 x 10^24 atoms/molecules
Explanation:
Avagadro's Number: 6.02214076 × 10^23
Avagadro's Number shows the number of molecules in 1 mole of substance. In this case, if there is 13.88 moles of lead, we multiply 13.88 by Avagadro's number:
(6.02214076 × 10^23)(13.88) = 8.358536 x 10^24 = 8.36 x 10^24
What does change in different types of milk?
1.
2.
Answer:
the flavour or the taste or the packaging
How many total atoms make up the chemical formula Ca3( PO4)2
12
13
11
10
Answer:
The total atoms present in the chemical formula is 13
Explanation: