The final temperature of the metal block : t=69.5 °C
Further explanationGiven
0.84 g water
Aluminum block = 51 g
Required
The final temperature
Solution
Enthalpy of vaporization of water is 44.0kJ/mol = 2.44 kJ/g=2440 J/g
Q out=Q in
Q releases = Q absorbed
Q water = Q Aluminum
m.Lf = m.cs.ΔT
0.84 x 2440 J/g = 51 x 0.903 J/g C x (t-25)
2049.6=46.053(t-25)
t=69.5 °C
.
What are 4 ways you can improve your skeletal system health?
Answer:
1. get vitamin c
2. get your bone mineral density tested
3. don't smoke or drink excessively
4. start weight-bearing exercise
Explanation:
helps improve skeletal system
ANSWER FAST PLS>> WILL GIVE BRAINLIEST
A 52.6 kg car is driving at a constant velocity of 20 m/s over 2 seconds. What is its acceleration?
Answer:
Centripetal acceleration is related to tangential velocity through ac = v ^ 2 / R
The angular velocity is related to the tangential velocity through ω = v / R
a) ac = (20 m / s) ^ 2/20 m = 20 m / s ^ 2
b) ω = 20 m / s / 20m = 1 rad / s
c) The swept angle is Ф = ω.t = 1 rad / s. 3600 s = 3600 rad
Expressed in turns it is Ф = 3600 rad. 1 turn / (2.π rad) = 573 turn
Explanation:
Help plz I ONLY GOT 2 mins left
Answer:
uhhh i don't know the experiment
put link and i might be able to help you
Explanation:
Which type of bond has an equal sharing of electrons?
covalent bonds
The equal sharing of electrons in a covalent bond is called a nonpolar covalent bond.
Temperature and Heat are the same.
A. True
B. False
Explanation:
Heat is a measure of change, never a property possessed by an object or system.
Therefore, it is classified as a process variable.
Temperature describes the average kinetic energy of molecules within a material or system and is measured in Celsius (°C), Kelvin(K), Fahrenheit (°F), or Rankine (R).
Heat and temperature are two different quantities but they do rely on each other.
Hope it helps you!!In the sodium-potassium pump, sodium ion release causes two K ions to be released into the cell. __________________ True False
Answer:
false
Explanation:
As we know that in sodium-potassium pump .
sodium potassium move 3Na+ outside the cells
and moving 2k+ inside the cells
so that we can say that given statement is false
Answer FALSE
what is the answer I needed now please quickly
PLZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELLLLLLLLLP
Water changes from state to state in the water cycle. Which of the following best describes the process of the water cycle, which takes water from the clouds and drops it on the earth in the form of snow, sleet, hail, or rain?
A Transpiration
B Evaporation
C Precipitation
D Cloud Formation
Answer:
C. Precipitation
Explanation:
Answer:
Precipitation
Explanation:
Write down the formulas of the following compounds: magnesium chloride, alumina, chlorine (VII) oxide, sodium sulfide, calcium oxide.
Answer:
- Magnesium chloride: MgCl₂.
- Alumina: Al₂O₃.
- Chlorine (VII) oxide: Cl₂O₇.
- Sodium sulfide: Na₂S.
- Calcium oxide: CaO.
Explanation:
Hello!
In this case, according to the naming rules for the given compounds, which state that binary salts have a metal and a nonmetal and oxides contain oxygen, we have:
- Magnesium chloride: MgCl₂.
- Alumina: Al₂O₃.
- Chlorine (VII) oxide: Cl₂O₇.
- Sodium sulfide: Na₂S.
- Calcium oxide: CaO.
Best regards!
In a genotype what does the lower case letter represent
Answer:
The lower case letter represents the recessive allele.
Explanation:
I just learned abt this today so im confident that this is correct
4. If the density of seawater at a depth of 10,000 m is 1.071 g/mL and a 25.0 g sample of water from that depth contains 99.7 mg K , what is the molarity of potassium ions in the sample
Answer:
0.11 M.
Explanation:
Hello!
In this case, since the molarity is computed as the moles of solute divided by the volume of solution in L, we first need to compute the moles of potassium in 99.7 mg as shown below:
[tex]n_K=99.7mgK*\frac{1gK}{1000mgK} *\frac{1molK}{39.1gK}=0.00255molK[/tex]
Moreover, given the density of the seawater (mixture containing the K and other solutes), we can compute the liters as shown below:
[tex]V=25.0g*\frac{1mL}{1.071g}*\frac{1L}{1000mL}=0.0233L[/tex]
Therefore, the molarity turns out:
[tex]M=\frac{0.00255mol}{0.0233L}\\\\M=0.11M[/tex]
Best regards!
PLEASE HELP DUE SOON
Answer:
This is all true if the atom has to be neutral.
Also what does V mean?
Helium: one shell with 2 neutrons and 2 protons in the center, with 2 electrons in the first shell.
Lithium: two shells with 4 neutrons and 3 protons in the center, with 2 electrons in the first shell, and 1 electron in the second shell.
Nitrogen: two shells with 7 neutrons and 7 protons in the center, with 2 electrons in the first shell, and 5 electrons in the second shell.
Flourine: two shells with 9 protons and 10 neutrons in the center, with 2 electrons in the first shell, and 7 electrons in the second shell.
Neon: two shells with 10 neutrons and 10 protons in the center, with 2 electrons in the first shell, and 8 electrons in the second shell.
Boron: two shells with 6 neutrons and 5 protons in the center, with 2 electrons in the first shell, and 3 electrons in the second shell.
Help me please) attached the screen below. Thanks
Answer:
1) d = 2.4 g/cm³
2) m = 25 g
3) v = 126.7 cm³
Explanation:
Given data:
Mass of material = 24 g
Volume of material = 10 cm³
Density of material = ?
Solution:
Formula:
d = m/v
by putting value,
d = 24 g / 10 cm³
d = 2.4 g/cm³
2) Given data:
Density of material = 5 g/cm³
Volume of material = 5 cm³
Mass of material = ?
Solution:
Formula:
d = m/v
5 g/cm³ = m / 5 cm³
m = 5 g/cm³×5 cm³
m = 25 g
3)Given data:
Density of material = 3 g/cm³
Mass of material = 380 g
Volume of material = ?
Solution:
Formula:
d = m/v
3 g/cm³ = 380 g / v
v = 380 g /3 g/cm³
v = 126.7 cm³
Which option shows the correct conversion of units from 3 L to mL?
3 L ∙ 100 mL1 L
3 L ∙ 1,000 mL1 L
3 L ∙ 1 mL100 L
3 L ∙ 1 mL1,000 L
Answer:
345
Explanation:
What is POH?
A. pH = log[OH-]
B. POH =[ht][OH-]
C. pOH = -log(OH)
D. pH = -log[H+]
Answer:
The answer is C
Explanation:
2.2.2: The pH Scale
pOH = -log[OH-]
how many moles are there in 3.80x10^22 molecules of CCI4?
image attached and will give brainliest
Answer:
0.0646 mole.
Explanation:
The following data were obtained from the question:
Number of molecules = 3.89×10²² molecules
Number of mole =?
The number of mole present in 3.89×10²² molecules of CCl₄ can be obtained as follow:
From Avogadro's hypothesis:
6.02×10²³ molecules = 1 mole
Therefore,
3.89×10²² molecules = 3.89×10²² molecules × 1 mole / 6.02×10²³ molecules
3.89×10²² molecules = 0.0646 mole
Thus, 0.0646 mole is present in 3.89×10²² molecules of CCl₄.
WILL MARK ASBRANLYST!!!!
All successful organisms must be able to do what three things? Question 1 options: A. obtain energy, eat, play video games B. obtain energy, produce offspring, maintain their structure C. maintain their structure, eat, build a home D. obtain energy, produce offspring, eat
Answer:obtain and use resources, grow, reproduce, and maintain stable internal conditions while living in a constantly changing external environment.
Explanation:
All successful organisms must be able to do the three things including obtain energy, produce offspring, maintain their structure. The correct option is B.
What is an organism?In biology, an organism is any natural, living system that functions as a separate entity. Cells make up all organisms.
Taxonomy divides organisms into groups such as multicellular animals, plants, and fungi, or unicellular microorganisms such as protists, bacteria, and archaea.
The current classification system is based on the Linnean system and has eight levels of taxa: domain, kingdom, phylum, class, order, family, genus, and species.
All successful organisms must be able to do three things: obtain energy, generate progeny, and maintain their respective structure.
Thus, the correct option is B.
For more details regarding organism, visit:
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A person standing waist-deep in a swimming pool may appear to have shorter legs then they actually have because of which process?
1. Refraction
2. Absorption
3. Diffraction
4. Reflection
Answer: Refraction
Explanation: i took the test
22. Which statement best describes the use of catalytic converters in automobiles?
(1 point)
They decrease the rate of the reactions that produce harmful gases.
They oxidize hydrocarbons to form less toxic gases.
They combine the larger hydrocarbon molecules with smaller ones.
They increase reaction temperature for cleaner burning.
Answer:
B. They oxidize hydrocarbons to form less toxic gases.
Explanation:
A catalytic converter can be defined as an anti-pollution device containing a catalyst like platinum-iridium, installed in the exhaust chamber of an automobile so as to chemically convert harmful (poisonous) pollutants such as unburned hydrocarbons and carbon monoxide (CO), sulfur dioxide (S02), nitrogen oxide (NO) etc., into less harmful, poisonous or toxic chemical compounds.
This ultimately implies that, catalytic converters are typically used for converting harmful gases into less harmful, poisonous or toxic gases and molecules e.g carbon dioxide (C02) and water (H2O). This helps to prevent global warming, enhance the conservation of natural resources, as well as preserve the lives of living organisms and their natural habitat.
Hence, the statement which best describes the use of catalytic converters in automobiles is that they oxidize hydrocarbons to form less toxic gases.
A mole of Cu (Copper) is equal to...
Answer:
hi
Explanation:
i think 63.55 g
hope it helps have a nice day
good bye: )
Answer:
Explanation:
A mole of Cu (Copper) is equal to 63.55g
Question 3 (1 point)
Consider the following unbalanced chemical equation representing the combustion of methane, yielding carbon dioxide and water.
CH4 + O2 --> CO2 + H20
If you had burned 800 g of methane, how many moles of Carbon dioxide would be produced?
A)122.22
B)8
C)2200
D)100
E)670
F)750
G)50
Answer:
Im pretty sure its B
Explanation:
Answer:
G) 50 mol
Explanation:
Given data:
Mass of methane = 800 g
Number of moles of CO₂ produced = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of methane:
Number of moles = mass/molar mass
Number of moles = 800 g/ 16 g/mol
Number of moles = 50 mol
Now we will compare the moles of methane and carbon dioxide.
CH₄ : CO₂
1 : 1
50 : 50
Discuss the importance of Icaming social anthropology for university students
Answer:
what is the importance of anthropology as a student?
Social anthropology plays a central role in an era when global understanding and recognition of diverse ways of seeing the world are of critical social, political and economic importance. Social anthropology uses practical methods to investigate philosophical problems about the nature of human life in society.
Explanation:
A scientist observes several different fossils in a
rock layer. Based on this observation, which is
the best conclusion?
A. The fossils are composed of lava that cooled
around several organisms.
B. The fossils formed about the same time as the
rock layer in which they were found.
C. The fossils formed after heat and pressure
changed the type of rock in the rock layer.
D. The fossils are composed of the same material
as the organisms from which they formed.
A scientist observes several different fossils in a
rock layer. Based on this observation, which is
the best conclusion?
Answer:A. The fossils are composed of lava that cooled
A. The fossils are composed of lava that cooledaround several organisms.
B. The fossils formed about the same time as the rock layer in which they were found.
Explanation:That's the right answer but you can choose one.
#CARRYONLEARNING #STUDYWELLWhat is the density of lead (in g/cm^3 3 ) if a rectangular bar measuring 0.500 cm in height, 1.55 cm in width, and 25.00 cm in length has a mass of 220.9 g? Report the answer with the units of g/cm^3 3 and the proper number of significant figures. Numbers in bold count towards significant figures. Type your answer here with correct significant figures and units:
Answer:
Density = 11.4 g/cm³
Explanation:
Given data:
Density of lead = ?
Height of lead bar = 0.500 cm
Width of lead bar = 1.55 cm
Length of lead bar = 25.00 cm
Mass of lead bar = 220.9 g
Solution:
Density = mass/ volume
Volume of bar = length × width × height
Volume of bar = 25.00 cm × 1.55 cm × 0.500 cm
Volume of bar = 19.4 cm³
Density of bar:
Density = 220.9 g/ 19.4 cm³
Density = 11.4 g/cm³
At low temperatures and high pressures ethene gas C2H4(g), does not behave like an ideal gas. Use chemical principles to explain why this is?
Answer:
The particles of an ideal gas have no volume and no attractions for each other. In a real gas, however, the molecules do have a measurable volume. The molecules of real cases have intermolecular attractions for each other.
An ideal gas behaves like a real gas under the conditions of low temperature and high pressure.
This is because at low temperature and high pressure molecules of gas will have negligible kinetic energy and strong force of attraction.
Thus ethene gas does not behave like an ideal gas at low temperatures and high pressures.
The particles of an ideal gas have no volume and no attraction for each other. In a real gas, however, the molecules have a measurable volume. The molecules of real gases have intermolecular attractions for each other. An ideal gas behaves like a real gas under conditions of low temperature and high pressure. This is because at low temperatures and high-pressure molecules of gas will have negligible kinetic energy and a strong force of attraction. Thus, ethene gas does not behave like an ideal gas at low temperatures and high pressures.
All cells reproduce to produce new cells. How they
reproduce depends on the type of cell is being
produced. When you get a paper cut, your cells
reproduce by (4) to make new copies that are
the same as your old cells to heal. These skin cells
are (5)_and contain all your DNA. This is
different from your gametes, which are (6)
These cells are produced through the process of
(7). . The purpose of these cells is to ensure
that your children will have (8)_ __, and
not be identical to you.
Answer:
meiosis
Explanation:
Sex cells or gametes undergo a division process different from the rest of the cells, that is, they do not comply with mitosis but with meiosis, and this is because two cells (female and male gametes) have to fuse with their hemi load genetics to complete a new genetic code together.
Answer:
4) mitosis
5) chromatids
6) sex cells
7)meiosis
8) genetic variability
Explanation:
:P maTh
which formula represents a molecule solid
Dry ice are the molecule which represent molecular solid. Hence option c is correct.
What are molecule?Molecules are defined as the lowest identifiable unit into which a pure material can be divided while maintaining its chemical makeup and attributes is made up of two or more atoms. When two or more atoms come together and form bonds with one another, a molecule is created. Each atom shares an electron when a bond is formed between them. A molecule is created as a result of a covalent bond.
Molecular solid are defined as composed of atoms or molecules joined by hydrogen bonds, London dispersion forces, and dipole-dipole forces. Solids made of molecules and held together by van der Waals forces are referred to as molecular solids. Examples include carbon dioxide, hydrogen, etc. Crystalline solids include ZnS. The ionic solid MgO is. Diamond is organized in a network.
Thus, dry ice are the molecule which represent molecular solid. Hence option c is correct.
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Your question is incomplete, but probably your complete question was
Which of the following is an example of molecular solid?
a. Zinc sulphide
b. Magnesium oxide
c. Dry ice
d. Diamond
Which of these elements has the smallest atomic radius?
A. Se
B. Br
C. Ge
D. As
Answer:
Its Br on Ap ex
Explanation:
Just got it wrong ;( it's B
Which two nitrogen bases pair together in DNA
How can you make an item that is made of magnetic material become a permanent magnet instead of a temporary magnet? *
1.You can put it in a very strong magnetic field. 2.You can heat it while it is being influenced by a magnetic field. 3. You can leave it in the magnetic field of an actual magnet for a long time. 4. You can do any of the above.
You can put it in a very strong magnetic field.
