Answer:
[tex]0.8696\ \text{J/g}^{\circ}\text{C}[/tex]
Explanation:
[tex]m_m[/tex] = Mass of metal = 19 g
[tex]c_m[/tex] = Specific heat of the metal
[tex]\Delta T_m[/tex] = Temperature difference of the metal = [tex]99-23=76^{\circ}\text{C}[/tex]
V = Volume of water = 150 mL = [tex]150\ \text{cm}^3[/tex]
[tex]\rho[/tex] = Density of water = [tex]1\ \text{g/cm}^3[/tex]
[tex]c_w[/tex] = Specific heat of the water = 4.186 J/g°C
[tex]\Delta T_w[/tex] = Temperature difference of the water = [tex]23-21=2^{\circ}\text{C}[/tex]
Mass of water
[tex]m_w= \rho V\\\Rightarrow m_w=1\times 150\\\Rightarrow m_w=150\ \text{g}[/tex]
Heat lost will be equal to the heat gained so we get
[tex]m_mc_m\Delta T_m=m_wc_w\Delta T_w\\\Rightarrow c_m=\dfrac{m_wc_w\Delta T_w}{m_m\Delta T_m}\\\Rightarrow c_m=\dfrac{150\times 4.186\times 2}{19\times 76}\\\Rightarrow c_m=0.8696\ \text{J/g}^{\circ}\text{C}[/tex]
The specific heat of the metal is [tex]0.8696\ \text{J/g}^{\circ}\text{C}[/tex].
Which of the following are subatomic particles that orbit the outside of an atom?
A.
molecules
B.
electrons
C.
neutrons
D.
protons
A small motor does 4000 J of work in 20 s. What is the power of the motor in watts?
Answer:
200 W
Explanation:
Formula of Power is
P= W/T
where
W= Work and T= Time
so
4000/20 = 200J/s or 200 W
How many grams of chlorine can be produced by the electrolysis of sodium chloride solution
Fe²O³ + 3CO --> 2 Fe + 3CO²
calculate the mass of chlorine that can be formed from 50g of sodium chloride
Answer:
Therefore,900 C of charge produce produce chlorine=(71g)(1.93×105C)×(900C)=0.331g.
Explanation:
Follow me..........
Which of the following is NOT a chemical change?
Answer:
?
Explanation:
Carbon dioxide consists of a central carbon atom with an oxygen atom on each side. Draw a model of the molecule formed by putting lines between the atoms to represent bonds so that each atom has the correct number of bonds.
Explanation:
Structure of Carbon dioxide is in the attachment.
Here,
Hybridization of Carbon is sp
Bond angle 180°
Structure = linear
Single bond consists of sigma bond. Double bond consists of one sigma and one pie bonds. Triple bond consists of one sigma and two pie bonds.Answer:
O=C=O
Explanation:
this is all you need
Rock salt mixed with ice actually lowers the temperature of the salt/ice mix. Physical or chemical property?
Answer:
chemical
Explanation:
Salt changes the chemical makeup of the water and allows it to get colder than what it would normally freeze at.
Who is best associated with Psychoanalysis?
-Wilhelm Wundt
-Sigmund Freud
-William James
-None of the above
-Other:
Answer:
None of the above
Explanation:
Erikson's was a student of freud's and expanded of his theory of psychosexual development by emphasizing the importance of culture in parenting practices and motivations and adding three stages of adult development.
I added 6 to a certain number and then divide the result by 3. Find the number if my final answer is 5. (show working)
Answer:
let the number be x
so (x+6)/3 =5
x+6=15
x=9
If the temperature changes in a chemical reaction, what has occurred?
Energy was transferred.
There was no energy transfer.
Energy was destroyed.
Energy was created.
Answer:
Energy was transferred
Explanation:
If the temperature changed, energy must have been added or lost, but not created. Energy can't be created or destroyed.
I need helpppppppppp
H2O oxidation number
Answer:
2 ^0
Explanation:
Answer:
0
Explanation:
Water doesn't really have a charge
Quinton answer me or I will never talk to u again pls
Answer:
huh
Explanation:
well its an easy one but it hard for me so plz
Answer:
need more so we can answer
Explanation:
Before the quarry was dug, the land contained more vegetation. What impact has this change most likely
had on the local ecosystem?
Answer: loss of nutrients
Explanation:
the quarry was dug up and vegetation started dyeing. the quarry was probably rich with nutrients.
Where would we find yellow bone marrow?
Answer:
Yellow bone marrow can be found in the long bones of the human body one such bone being the femur the yellow bone marrow contains certain stem cells which produce cartilage, fat and bone.
Explanation:
Answer:
Yellow bone marrow can be found within the medullary cavity. You see, the anatomy of a compact bone consists of blood vessels, cartilage, red bone marrow, etc. Within the bone there is spongy bone which holds the medullary cavity, and within this cavity there is yellow bone marrow.
put them in order the right way like the question says. get correct for brainleist! :)
Answer:
Fall or autumn
Explanation:
what is deposition ?
The act of depositing material, especially by a natural process; the resultant deposit.
Answer:
the act of deposing someone especially a monarch
42. Proton and electuron.
Puroton
Electron.
Differences between proton and electron in two points
Answer:
Protons:
- positive
- aka cation
- in the nucleus along with the neutrons
Electrons:
- negative
- aka anion
- situated in the orbital shells/configuration levels (there are many names)
what do the suffix in a polyatomic ion mean
Answer: The suffixes of the names of polyatomic ions have a pattern associated with them. ... For example, the sulfite ion has three oxygen atoms whereas the sulfate ion has four oxygen atoms.
If 45.0 mL of a 4.00 M sodium sulfate (Na2SO4) solution is used for the reaction shown above, how many moles of sodium ions were present in solution before the reaction proceeded?
Answer:0.360
Explanation:
I had this on ck12 yesterday
The moles of sodium ions were present in the solution before the reaction proceeded is 0.36moles
Molarity of a solutionThe formula for calculating the molarity of a solution is expressed as:
Molarity = moles/volume
Given the following parameters
Molarity = 4.00M
Volume of sodium sulfate = 45mL = 0.045L
Substitute to have;
Molarity = 4 * 0,045
Molarity = 0.18
Since there are 2 atoms of sodium ion in the solution, hence the moles of sodium ions were present in the solution before the reaction proceeded is 0.36moles
Learn more on molarity here: https://brainly.com/question/17138838
Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation:
( )O2->( )O3
1 1
2 2
3 3
Its one of the numbers for each blank space inside the parenthesis
Answer: (1)CaSO4 -> (2)O2 + (1)CaS
Explanation: edge 2020 chem
Plz I need help!!!!!!!!!!!
Answer:
Your help from me is a good luck! :)
Explanation:
Lol sorry I don't know the answer and don't want to tell you something wrong. Good luck though. Have a great day!
please help!!! based on the lewis /electron dot representation of the two atoms predict the ratio of metal
Answer:
The answer is 1:2 option B
Plz mark as brainliest............. hope it helps
The ratio of the metal cationic atom to the nonmetal anionic atom will be 1 :2. Therefore, option B is correct.
What is the lewis electron dot diagram?A lewis electron dot representation is utilized to represent the number of bonds, the bonding atoms, and the lone pairs on the atoms in the molecule or chemical compound.
Straight lines are used to represent the bond between atoms that are bonded to one another and excess electrons are represented as dot pairs to show the lone pairs on the atoms.
In the given image, calcium has two valence electrons and Fluorine needs one electron to complete its octet. So the calcium will donate its two electrons to two F. Each Flourine will accept one electron Therefore, the compound formed will be CaF₂.
Therefore, the ratio of the calcium cationic atom to the Fluorine anionic atom will be 1 : 2.
Learn more about the lewis dot diagram, here:
brainly.com/question/14091821
#SPJ2
In your own words, explain why each of the filler blocks (s,p,d,f) on the periodic chart have their characteristic width(number) of groups.
Answer:
Each of the four blocks of the periodic table is the collection of elements that have common valence orbitals, or that their valence are found in one of the four orbitals with azimuthal quantum number 0, 1, 2, or 3 which corresponds to the shape (s), principal (p), diffuse (d), or fundamental (f) orbitals respectively
The maximum number of electrons in the s-orbital = 2 electrons
The maximum number of electrons in the p-orbital = 6 electrons
The maximum number of electrons in the d-block = 10 electrons
The maximum number of electrons in the f-orbital = 14 electrons
Therefore, given that the elements of the within each of the blocks have their valence electron in the corresponding orbital in which they are located on the periodic table, given the periodic nature of the periodic table, the width of each block of elements corresponds to the maximum number of elements that can be found in their valence orbital.
Therefore, we have;
The width of the s-block elements = 2 block units
The width of the p-block elements = 6 block units
The width of the d-block elements = 10 block units
The width of the f-block elements = 14 block units
Explanation:
how many grams of magnesium are in 7.43 x 10 to the 22 atoms of mg
Mass of Mg=3 g
Further explanationThe mole is the number of particles contained in a substance
1 mol = 6.02.10²³
mol Mg in 7.43 x 10²² atoms :
[tex]\tt \dfrac{7.43\times 10^{22}}{6.02\times 10^{23}}=0.1234[/tex]
mass Mg
[tex]\tt mass=mol\times MW\\\\mass=0.1234\times 24.3=2.99\approx 3[/tex]
Drinking water should have sufficiently low levels of____
to prevent disease. The missing word ?? Please
Answer:
Drinking water should have sufficiently low levels of dissolved salts or microbes.
Explanation:
Place following elements in order from largest to smallest atomic radius. S, P, Na, Rb, Cl
Answer:
Rb>Na>P>S>Cl
Explanation:
In a group from up to down the atomic radius increases
In a row from left to right the atomic radius decreases.
What is the electron configuration of Iron
The electron configuration of Iron is:
[Ar] 3d⁶4s²
The atomic number of an atom with 14 neutrons and a mass of 27 is
27
1
13
Answer:
13
Explanation:
The mass number of an atom is the sum of the number of protons and neutrons.
27 = protons + 14
protons = 13
The number of protons is equal to the atomic number.
Answer: 41 or Niobium
Explanation: To get the number of Protons or Electrons given the number of Neutrons and Mass, you have to add the given numbers. This gives the number of Protons and Electrons which is the same number as the Atomic number. So, 14 Neutrons plus the mass of 27 is equal to 41, which gives the element Niobium
A steel cylinder with a moving piston on top is filled with helium (He) gas. The force that the piston exerts on the gas is constant, but the volume inside the cylinder doubles, pushing the piston up.
Which is the cause for the change?
A. The helium atoms increased in size.
B. The density of the helium atoms decreased.
C. The temperature increased.
D. The pressure decreased.
Answer: B. The density of the helium atoms decreased.
Explanation:
