Answer:
3515.032799999922
Explanation:
Can someone tell me how to draw a atomic model for Cd please helpppppp
Answer:
iyf86d85d85s85d85s5sitdiy
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."
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 :)
What is the molar mass of lead nitrate (Pb(NO3)2) from the equation below?
2Pb(NO3)2(s) -> 2PbO(s) + 4NO2(g) + O2(g)
A.
269 g
B.
331 g
C.
662 g
D.
283 g
Answer:
331.2 g/molExplanation:
The molar mass of lead nitrate (Pb(NO₃)₂) is 331 g. Therefore, option B is correct.
The atomic mass of lead (Pb) is 207.2 grams per mole.
The atomic mass of nitrogen (N) is 14.0 grams per mole.
The atomic mass of oxygen (O) is 16.0 grams per mole.
In lead nitrate, 2 nitrate ions (NO₃), so multiply the atomic mass of nitrogen by 2 and the atomic mass of oxygen by 6 (since there are 3 oxygen atoms in each nitrate ion):
2(N) + 6(O) = 2(14.0 g) + 6(16.0 g)
= 28.0 g + 96.0 g
= 124.0 g
Pb(NO₃)₂ = 207.2 + 2(14.01 + 3(16.00))
= 207.2 + 2(14.01 + 48.00)
= 207.2 + 2(14.01 + 48.00)
= 207.2 + 2(62.01)
= 207.2 + 124.02
= 331 g
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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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how mutch heat do you use to evaporerate warter
Answer:
Water's heat of vaporization is around 540 cal/g at 100 °C. The same amount of heat is exchanged or released in the phase shift during the condensation of 1 g water vapor to 1 g of water.
Explanation:
brainliest?
waters boiling point is 212F or 100C
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)
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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QUESTION: What is the main function (job) of the Nervous System?
A. The nervous system controls the breakdown of food into small molecules, which are then absorbed into the body.
B. The nervous system's main job is to move fresh air into your body while removing waste gases.
C. The nervous system controls everything you do, including breathing, walking, thinking, and feeling.
D. The nervous system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
Answer:
It is C
Explanation:
it sends signals to the brain so it would be C
Answer:
C. The nervous system controls everything you do, including breathing, walking, thinking, and feeling.
is the answer
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
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
What is the water vapor density maximum at 30 ᵒC? *
1.5 mol/1000 L
1.7 mol/1000 L
30 mol/1000 L
2.3 mol/1000 L
2.3 mol/1000L
Explanation:
relative humidity (rh)is the ratio of the partial pressure of water at a given temprature
This type of bonding can be found in substances that are solids at
room temperature.
Select one:
O a. metallic
O b. ionic
O c. covalent
O d. not enough information
Please help fast I will give brainliest
Answer:
B.
Explanation:
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 potasioWhich gas is emitted through the burning of fossil fuels?
O) carbon dioxide
O) nitrous oxide
O) chlorofluorocarbons
O) oxygen
Ecosystem diversity, species diversity, genetic diversity all intertwine to create ____________.
A. Vulnerability
B. Biodiversity
C. Interdependence
D. Recycling
“Science”
Answer:
B
Explanation:
Biodiversity matches up with the themes of 'ecosystem diversity, species diversity, genetic diversity'
If a baker making chocolate chip cookies accidentally misreads a recipe and adds something extra, forgets to add something, or adds the wrong ingredient, what can happen to the cookies?Explain how this analogy can be used to describe a mutation.
Answer:
See Explanation
Explanation:
Genetic mutation refers to the alteration of the sequence of bases in the gene of an organism. Recall that the gene contains sensitive information about the characteristics of an organism.
There are three types of genetic mutation which includes; base substitutions, deletions and insertions.
Using the analogy of the baker stated in the question, if he forgets to add something, then a part of the recipe has been deleted. This is analogous to the omission or deletion of a base in the sequence leading to mutation.
An additional or extra ingredient may be added to the recipe. This is analogous to insertion of a new base into the sequence leading to mutation.
If the baker adds a wrong ingredient instead of what he is supposed to add, this is analogous to substitution of a base by another leading to mutation.
In each of these cases, the taste of the cookies is marred. The baker can never produce the same taste of cookies exactly as described by the recipe book. This means that insertions, deletions and substitution of bases produce a new genetic code that is different from the original genetic code. This is referred to as genetic mutation.
Silver is a conductor. *
Is it true or false
Answer:
True
Explanation:
Answer:
True.
Explanation:
Silver is a good conductor of electricity because the atoms have many electrons that can be moved.
Hi, am I hot??
Please tell me I’m hot.
Answer:
you hot A S F
Explanation:
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 is a soluble compound that reacts with acid to produce carbon dioxide?
Explanation:
like all metals,calcium carbonate reacts with acidic solution to produce carbon dioxide
In which of the following statements best describes the sun's
convective zone?
The layer of the sun where nuclear
fusion occurs and gives the sun its
energy
The layer of the sun where hot plasma
rises, then falls as it cools near the
surface.
O The layer of the sun seen during a
solar eclipse.
The layer of the sun that radiates
energy outwards from the sun's core.
Answer:
The answer is the layer of the sun that radiates energy outwards from the sun core
Explanation:
the reason why that is becuase the convection zone is a layers which is unstable to convection. And energy is primarily or partially transported by convection
Answer:
D
Explanation:
HELP THIS IS DUE SOON AND I HAVE MORE WORK TO DO
Answer:
A
Explanation:
Most of the world's active volcanoes are located along or near the boundaries between shifting plates and are called "plate-boundary" volcanoes.
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
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:
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
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.
Water evaporates from oceans, lakes, streams, plants and even soil.
TRUE or FALSE
Answer:
True
Explanation:
how many electrons does Co2- have?
Answer:
Explanation:
6 electrons
carbon dioxide, C has atomic number 6 so it has 6 electrons and oxygen has atomic no 8, i.e 16 electrons.