Answer:
Given metal is iron
Explanation:
Given data:
Heat absorbed = 790.24 J
Initial temperature = 40.0 °C
Final temperature = 72.0 °C
Mass of metal = 55.0 g
Identity of metal = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 72.0°C - 40.0°C
ΔT = 32 °C
790.24 J = 55 g ×c × 32 °C
790.24 J = 1760 g. °C ×c
c = 790.24 J /1760 g. °C
c = 0.449 J/g. °C
The specific heat capacity of iron is 0.449 J/g. °C thus, given metal is iron.
Which soil develops in the wettest climate?
Answer:
Prairie
Explanation:
because it grows in the same type of climate, its amount of humus. sorry if its wrong I am not good with chem but i hope its right :)
Which orbital (or ring) contains the electron that calcium loses to form an ion?
Answer: 4s orbital contains the electron that calcium loses to form an ion
Explanation:
Electronic configuration represents the total number of electrons that a neutral element contains. The electrons are filled according to Afbau's rule in order of increasing energies.
Calcium with atomic number 20 has 20 electrons and has 2 valence electrons which it can lose to for stable [tex]Ca^{2+}[/tex] ion. The valence elctrons are present in valence shell i.e. 4s.
[tex]Ca:20:1s^22s^22p^63s^23p^64s^2[/tex]
[tex]Ca^{2+}:18:1s^22s^22p^63s^23p^64s^0[/tex]
what is the difference between a crescent moon and a gibbous moon?
Answer:
A crescent moon is any time less than half the moon is lit by the sun. A crescent moon is going from the third to first quarter. A gibbous moon is any time more than half the moon is lit by the sun.
Explanation:
For dessert, she prepares to bake a delicious apple pie. During one of the steps, she
notices an example of a chemical change. Which one is it?
O heating sugar to make caramel
softening butter
O folding a sheet of aluminum foil
dicing an apple
Answer:
heating the sugar
Explanation:
Answer:
softening butter...
Explanation:
that sounds the best because the butter be melting
red light has a longer _____ than violet light
Answer:
wavelength
n
n
n
n
n
n
n
in
n
Answer: wavelength:)
Explanation:
Why are organelles called "little organs"?
The word epi in Greek means "upon" or "over". Based on this definition, what body part likely contains epithelial tissue? In your answer, explain how cell arrangement helps this body part perform its function.
Answer: epithelium
Explanation: epithelial tissues are widespread throughout the body forming the covering of all body surfaces, body cavities, hollow organs and are also major tissues in glands performing various functions from secretion to protection, absorption, excretion, diffusion, sensory reception etc. This differentiation allows the cells of the epithelium to perform its function.
By definition, epithelial cells are membranous tissue composed of one or more layers of cells forming the covering of most internal- (lining of vessels and small cavities) and external surfaces (skin) of the body and its organs.
!please help me if u can asap!ty!
1. How many moles of potassium are present in 4.23 x 10^25 potassium atoms? (show solution)
Answer:
70.27 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{4.23 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 70.265780...[/tex]
We have the final answer as
70.27 molesHope this helps you
CaCO3 Calcium oxide and carbon dioxide
Answer:
Explanation:Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room ...
a night when the temperature is 22°C
Answer:
what is the question? :)
Maame Akosua makes a conclusion from the pie charts. She says there is no tin in the Earth's crust. Do you think she is correct? Give a reason for your answer.
Answer:
No
Explanation:
Tin is present in the earth's crust. Tin in the earth crust is never obtain or found in a free form or state. In the earth's crust, it is mainly found in the ore cassiterite. It is about the 50th most abundant element that is found in the earth's crust. This element is present in the igneous rocks.
Thus in the context, according to Maame Akosua 's conclusion from the pie chart, she is wrong that there is no tin present in the earth's crust.
You have been asked to draw a Bohr model of the element carbon. How would you arrange the dots that represent electrons?
Answer:
You have been asked to draw a Bohr model of the element carbon. How would you arrange the dots that represent electrons? They would be embedded in a solid core. They would be in rings around the nucleus
explain why the troposphere has a larger total mass in the stratosphere even though the stratosphere so much bigger
Answer:
The troposphere is the lowest layer of Earth's atmosphere, and is also where nearly all weather conditions take place. It contains 75% of the atmosphere's mass and 99% of the total mass of water.
Explanation:
There are______sulfur atoms and________hydrogen atoms in 100 molecules of C4H4S2.
Round to the one's place.
Answer:
200 sulphur atoms
400 H atoms
Helppp I have no clue which one :)
Answer:
b
Explanation:
Is water wet? A. yes B.no C.Idk
Answer:
C
Explanation:
when in doubt pick C...
Sort the metric system prefixes into the correct order, smallest to largest.
deci-
centi-
deca-
hecto-
milli-
kilo-
Answer:
mili
hecto
deci
deca
centi
kilo
Explanation:
Answer:
milli-
centi-
deci-
deca-
hecto-
kilo-
Which number is always increasing throughout your organized table?
Answer:The number of Protons
Explanation:
the sun provides the earth with
Answer:
heat and light
Explanation:
Answer:
Sunlight, and weather
Explanation:
Pls mark brainliest if this helps
35 POINTS!!!!
Four forces are exerted on an object as shown below: A square is shown with an arrow pointing up labeled 3 N, an arrow pointing right labeled 2 N, an arrow pointing down labeled 4 N and an arrow pointing left labeled 2 N In which direction will the object move? Up Down Left Right
Answer: Down
Explanation: There is more force pulling on the object
Which of the following electrolytes would you use to electroplate silver (Ag)
on iron (Fe)?
A. CuCl2
B. FeSO4
C. Zn(CIO3)2
D. AgNO3
Answer:
D. AgNO3
Explanation:
a-p-e-x
The correct answer is D or AgNO3.
Which of the following is the best hypothesis? A. Chemical reactions and physical reactions are interesting to watch B. How does wood change when it burns in a campfire? C. During a chemical reaction, the total mass of material does not change D. Chemical reactions are easier to identify than physical reactions
Answer:
c
Explanation:
that is what u think is going to happen it IS AN HYPOTHESIS it is an (theory)
How does understanding chemistry help us in the real world?
O A. It helps us know right from wrong.
O B. It helps us make informed decisions.
O C. It helps us understand scientists.
O D. It keeps us from doing dangerous things.
Answer:
D
Explanation:
It indeed does keep us from doing dangerous things, considering the fact that chemistry is done everywhere.
Answer:B
Explanation: I just took the quiz
PLEASE HELPP!!! WITH ALLL
Answer:
i dont think anybody is going to be able to do all of these lol
Explanation:
Using the balanced equation given below, calculate the number of moles of KCIO3 that should be reacted to produce 5.50 moles of KCI. ___ moles KCIO3
*your answer should be written as X.XX
2KCIO3 —> 2KCI + 3O2
(Please answer asap!)
Answer:
5.50 mil KCI * 2 mol KCIO3 / 2 mil KCI
I don’t know the answer, but my teacher gave me the steps to solve it...
Explanation:
Which characteristic describes the troposphere?
PLS HELP
Answer:
hope it helps..
Explanation:
The troposphere forms the lowest level of the Earth's atmosphere, extending down to the surface of the Earth. This layer also features the heaviest weight of all Earth atmosphere layers, comprising approximately 75 percent of the total atmospheric weight. The troposphere varies in thickness and height around the world.
Gases are measured in different units. Which of the following measurements of pressure are equal? Select all that apply.
101.325 kPa
101,325 Pa
1 atm
10 kPa
1,000 Pa
Explanation:
Pressure of a gas is the combined force with which the molecules bombard a unit area of the wall of the container.
1 atm = 760mmHg
= 760torr
= 101325Pa
= 101325Nm⁻²
1mmHg = 1torr
1Pa = 1Nm⁻²
101.325 kPa and 101,325 Pa are the same
1000Pa = 1kPa
101,325 Pa and 1 atm
1atm and 101.325 kPa
Select the correct electron configurations from the list below. You can refer to the periodic table for atomic numbers. Check all that apply.
Can someone please help me on this ty!!
Answer:
It would move towards the magnet or towards the opposite direction of the object.
Answer:
Gravity as well as electrostatic and magnetic attraction and repulsion provide real life examples of forces being exerted by one object on another without them being in contact with each other.
Explanation:
On Earth what are two ways in which gamma rays are produced
Answer:
On Earth, gamma waves are generated by nuclear explosions, lightning, and the less dramatic activity of radioactive decay.