Answer:
61.75 °C
Explanation:
According to the law of conservation of energy,
Qtin = - (Qliquid)
(m×c×∆T)tin = -(m×c×∆T) ethylene glycol
Where; m = mass
c = specific heat capacity
∆T = change in temperature
According to the information given in this question;
For tin: m= 10.04g, c= 0.213 J/g °C, initial temperature= 14.77 °C, final temperature=?
For ethylene glycol: m= 24.11g, c= 2.36 J/g °C, initial temperature= 63.52 °C, final temperature=?
Hence; (m×c×∆T)tin = -(m×c×∆T) ethylene glycol
10.04 × 0.213 × (T - 14.77) = - {24.11 × 2.36 × (T - 63.52)}
2.139 (T - 14.77) = - {56.899 (T - 63.52)}
2.139T - 31.59 = -56.899T + 3614.225
2.139T + 56.899T = 31.59 + 3614.225
59.038T = 3645.815
T = 3645.815/59.038
T = 61.75 °C
The final temperature of tin and ethylene glycol is 61.75 °C
how many atoms are in CaCI2
Answer:
4
Explanation:
bc Ca is 1 C is one L is two
(4.1357 x 10^-15) x (5.4 x 10^2) Answer must be in scientific notation
Answer:
22×10⁻¹³
Explanation:
Scientific notation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³
When we multiply or divide the values the number of significant figures must be equal to the less number of significant figures in given value. Thus, in given value,
(4.1357× 10⁻¹⁵) × (5.4×10²)
22×10⁻¹³
stages of mitosis in order
Answer:
nucleus formed
prophase
metaphase
anaphase
telophase and cytokinesis
Which is one factor that scientists use to classify orders of soil?
A. fertility
B. climate
C.dryness
D.bedrock
Answer: Its B/Climate
Im pretty sure if its wrong srry!
Hope this helped!
Explanation:
Apart from different ways to classify soils. The one factor that scientists use to classify orders of soil is climate. Hence, Option (B) is correct
What is Climate ?Climate is the long-term pattern of weather in a particular area.
Weather can change from hour-to-hour, day-to-day, month-to-month or even year-to-year.
A region's weather patterns, usually tracked for at least 30 years, are considered its climate.
Other factors people uses in classifying orders of soil are;
ClimatePlant typeSoil compositionSoil orders are known as the single dominant attributes affecting soils in any location.
They can be the prevalent vegetation such as Alfisols and Mollisols or the type of parent material such as Andisols and Vertisols or the climate variables such as lack of precipitation etc.
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what happens to the molecules as water freezes PLS HELP THIS IS DO TODAY
During freezing, water molecules lose energy and do not vibrate or move around as vigorously. This allows more stable hydrogen-bonds to form between water molecules, as there is less energy to break the bonds. ... Thus water expands as it freezes, and ice floats atop water.
When water molecule freezes, the water molecules have slowed down enough that their attractions fixed them into fixed positions.
What do you mean by freezing ?The term freezing is defined as a phase transition where a liquid converted into a solid when its temperature is lowered below its freezing point.
The freezing point is the temperature at which a liquid turns solid. In the freezer, for example, water-filled ice cube trays.
Water molecules freeze in a hexagonal pattern, with molecules further apart than when the water was liquid. It is worth noting that the molecules in ice would be vibrating.
Thus, When water freezes, the water molecules slow down to the point where their attractions arrange them into fixed positions.
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A sample contain 33.42g of metal pellets are poured on to a graduated cylinder initially containing 12.7ml of water, causing the water level to rise to 21.6ml. Calculate the density of the metal
Answer:
3. 76 g/ml^3
Explanation:
We are given the mass of the metal pellets which is 33.4 grams. To calculate the density of the metal, we need to divide the mass by the volume. The volume of the metal is not directly given so we need to find it ourselves. The water was initially 12.7 ml and then it rose to 21.6 ml after placing the metal pellets. This indicate that the volume of the metal pellets is 8.9 ml.
[tex]21.6 - 12.7 = 8.9[/tex]
We can now use the density formula.
[tex]p = \frac{m}{v} [/tex]
[tex]p = \frac{33.42}{8.9} [/tex]
[tex]p = 3.76[/tex]
The density of the metal is equal to 3.76 g/ml.
What is the density?The density of an object can be defined as the mass per unit volume. The average density is equal to the total mass of the object divided by the total volume of the object.
The mathematical formula for the density of the material is expressed as follows:
Density = Mass/Volume
The S.I. unit of the density is Kg/m³ and is an intrinsic property as it is independent of the size. If the size increases, the mass increases as well but the density of the material remains constant.
Given the mass of the metal, m = 33.42 g
Volume of the metal = Volume of water level with metal - volume of water
V = 21.6 -12.7 = 8.9 ml
The density of metal = 33.42/8.9 = 3.76 g/ml
Therefore, the density of the metal is 3.76 g/ml
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Which element has 16 protons in its nucleus?
neon
oxygen
sodium
sulfur
Answer: Sulfur
Explanation: Sulfur has 16 protons, silicon has 14 protons, and gold has 79 protons.
Answer:
d
Explanation:
Displacement is called vector quantity. Why?
Answer:
Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
Explanation:
what is the journey around the sun by earth called, and how long does it take?
Answer:
Its called ecliptic and it takes 365 days
Explanation:
Answer:
The journey around the Sun by Earth is called a revolution, it takes 365-and-a-quarter-days.
Explanation:
how many atoms in a sugar cube
Answer:
Sugar is made up of carbon, hydrogen and oxygen atoms. It's the way these atoms are connected that makes each type of carbohydrate different. In each molecule of table sugar there are: 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms.
Explanation:
Which example illustrates public scientific communication?
O A scientist collaborates with other scientists to plan an experiment.
O Ascientist sends a preview copy of a journal article to some colleagues.
O A federal government agency holds a press conference to describe the response to and the dangers of a new virus
epidemic,
A federal government agency publishes an article in a professional scientific journal detailing technical details of a
new virus
Answer:
D. A federal government agency publishes an article in a professional scientific journal detailing technical details of a new virus.
Explanation:
Public scientific communication is a way used by scientists to make the audience able to understand the basics of science to communicate an informed decision. There are several skills under public scientific communication that include connect with the public, talk to journalists, make science understandable, and understand the audience.
The best way to connect with the audience is to publish an article in a professional scientific journal because mostly journals are peer-reviewed having standard of quality.
A federal government agency informing about a new virus through an article in a professional scientific journal is the best way of public scientific communication as it will be for a specific audience along with a standard of quality.
Hence, the correct answer is "D".
The Following do not need sun's energy EXCEPT
a. rotating clock
b. evening torch
c. plowing man
d. winding stairways
Express 14.80 × 12.10 × 5.05 in scientific notation with the proper significant figures.
What did the Bohr model assume about the motion of electrons?
A. All electrons move in a circular orbit around the nucleus.
O
B. Electrons do not have a specific path around the nucleus.
OC. All electrons move in a single cloud layer around the nucleus.
D. Electrons always remain in the same location around a nucleus.
Answer:
A
Explanation:
THAT'S THE ANSWER EYEUSKSBAW
The transition metals (with the exception of Zn, Cd and Hg) are very much hard and have low volatility. Why Zn ,Cd and Hg has low melting points. (a) These have all their electrons paired. (b) These have maximum number of unpaired electrons. (c) These have very strong metallic bonding. (d) These have more metal-metal bonding.
Answer:
Zn ,Cd and Hg has low melting points because - These have all their electrons paired.
Explanation:
These have all their electrons paired -: All the electrons in the d-subshell are combined with Zn , Cd and Hg. The metallic bonds present in them are, therefore, weak. This is why they have low points of melting and bolting. therefore , this statement is true. These have maximum number of unpaired electrons. Since , these transition metals have all electrons paired , so this statement is incorrect.These have very strong metallic bonding -: Zn, Cd and Hg d-orbital are completely filled. They have poor metallic bonding and less compact packing due to their fully filled d-orbitals, so all of them are volatile in nature. Therefore, this statement is also not valid .These have more metal-metal bonding. -: Since , their metallic bond is weak , so this statement is not true .Hence , the correct option is A (These have all their electrons paired).
Rank the three elements according to their electronegativity,
from highest to lowest:
Fluorine (F), Silicon (Si), Chlorine (CI)
Answer:
F, Si, Cl
Explanation:
The flow of the electronegativity is up and far left. Therefore, the highest amount is in the far left and up because that is the trend. You can look up a graph on google showing the trend.
Elements found on the right side of the periodic table are considered ___________.
none of these
nonmetals
metalloids
metals
Answer:
nonmetals
Explanation:
Consider the element sodium. It's atomic number is __________ and equals ___________.
Answer:
11 and equals the number of protons
Explanation:
A mixture cannot be reversed back to it’s original properties (true or false)
Answer:
False
Explanation:
A mixture is composed of two or more substances that are combined through physical means. It has NOT undergo any changes in its chemical properties. So, even though its appearance change, it can be reverted back.
Answer:
That answer would be false.
Explanation:
Depending on the type of mixture, you can separate it and reverse it back to its original properties through filtration, evaporation, distillation, and chromatography.
what do you mean by work
Answer:
work is something u are working hard to get money or you are dedicated to it to have a daily wage
why is lithium used in the body?
Answer:
11
Explanation:
Which part of Earth absorbs the most sunlight? brainly
Answer:
the answer is A)Oceans
Explanation:
what is the name of CCI3
carbon trichlorine????
Carbon tetrachloride, also known by many other names (such as tetrachloromethane, also recognised by the IUPAC, carbon tet in the cleaning industry, Halon-104 in firefighting, and Refrigerant-10 in HVACR) is an organic compound with the chemical formula CCl4.
Pioneer species like Lichens and Mosses inhabit an area after a major disturbance, such as a volcanic eruption. Over time, other species are found in the disturbed areas, and the number of pioneer species decreases. Why does the number of pioneer species get less?
Answer:
The number of pioneer species get less as the area has more soil to support complex plants and the competition decreases the role of pioneer species.
Explanation:
Pioneer species like Lichens and Mosses inhabit an area after a major disturbance, such as a volcanic eruption. However, with time the number of pioneer species decreases.
The number of pioneer species get less as the area has more soil to support complex plants and the competition decreases the role of pioneer species.
is the volume of a coffee cup closer to 300 cm cubed or 300 dm cubed
Answer:
It is closer to 300 cm cubed
Explanation:
The volume of a coffee cup is closer to 300 cm cubed because their american volumes are around 10 ounces, and 10 ounces equals about 300 cm cubed. Hope it helps!
3. Which of the following does not affect the solubility of solid solutes?
a. Volume of solvent
b. Stirring
c. Temperature
d. Amount of solvent
Answer:
Temperature
Explanation:
i GUESS that's the ans lol sry I needed points
colonel flanders makes boxes of chicken with various numbers of pieces. He charges $ 0.40 for each piece of chicken, plus a fixed charge of $ 0.55 for the box, the rolls, etc. If Iddy Ottic bought the $6.95 box, how many piecesof chicken should the box contain?
Which refers to a method that relies on sound waves and is used by different animal species for navigation,
communication, and finding food?
echolocation
analog signaling
infrared detection
o digital location
HELP FAST ILL MARK BRAINLEST
Answer:
A
Explanation:
got it on edge
An echolocation refers to a method that relies on sound waves and is used by different animal species for navigation, communication, and finding food. Therefore, option A is correct.
What is an echolocation ?Echolocation is a method used by bats, dolphins, and other animals to locate objects using reflected sound. This enables the animals to move around in complete darkness, allowing them to navigate, hunt, recognize friends and enemies, and avoid obstacles.
(1) To hunt for prey, bats make high-frequency sounds. (2) Sound waves are used by dolphins and other toothed whales to locate prey and navigate their surroundings. (3) Nocturnal oil birds use echolocation to navigate their surroundings, particularly in low-light conditions.
Echolocation is used to help with orientation, obstacle avoidance, food acquisition, and social interactions.
Thus, option A is correct.
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What evidence suggests that four-legged animals came from fish?
Answer:
Paleontologists have uncovered new fossils from Tiktaalik roseae, which, while still a fish, is considered a transitional fossil that also has traits common to the first four-footed animals. This more complete picture of Tiktaalik suggests that the creature had strong, mobile hind fins.
Explanation:
hope this helps :P
When comparing bromine to chlorine, bromine has
A. Fewer protons in its nucleus.
B. A weaker effective nuclear charge
C. More valence electrons
D. More electron shielding
Explanation:
I'm pretty sure the answer is D