Answer:
They are electrical conductors because their delocalised electrons carry electrical charge through the metal.
Explanation:
for the second ques
not sure...
PLZZZ HELP!!! A chemist has synthesized a heavy element in the laboratory and found that it had this electron configuration:
1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p67s25f146d8
What is the name of this element?
a
Bohrium
b
Meitnerium
c
Darmstadtium
d
Seaborgium
e
Hassium
f
Roentgenium
K
Answer:
Darmstadtium! Happy to help! :)
9. A student needs to prepare 100 mL of a 0.50 M ammonium chloride, NH4Cl,
solution. How much solute does he need?
Answer:
2.67g of NH4Cl are required
Explanation:
Molarity is an unit of concentration in chemistry defined as the moles of solute (In this case, NH4Cl), per liter of solution.
To prepare 100mL of a 0.50M are required:
100mL = 0.100L * (0.50 moles / L) = 0.0500 moles NH4Cl
As molar mass of NH4Cl is 53.491g/mol:
0.0500 moles * (53.491g / mol) =
2.67g of NH4Cl are required Solve,55.1 grams of tin at 90.6°C is dropped into a calorimeter with 75.4 grams of water at 21.0°C.The temperature of both the metal and the water reaches 27.2°C.Solve for the specific heat of tin. pleaseee once u solve it please explain how u solved it.
Answer:
[tex]C_{tin}=0.560\frac{J}{g\°C}[/tex]
Explanation:
Hello there!
In this case, for this calorimetry problem, we can notice that the heat evolved by the hot tin is gained by the cold water as the calorimeter is perfectly isolated, so we can write:
[tex]-Q_{tin}=Q_{water}[/tex]
Thus, by defining the heats in terms of mass, specific heat and temperatures, we get:
[tex]-m_{tin}C_{tin}(T_F-T_{tin})=m_{water}C_{water}(T_F-T_{water})[/tex]
Now, since we are asked for the specific heat of tin, we solve for it as shown below:
[tex]C_{tin}=\frac{m_{water}C_{water}(T_F-T_{water})}{-m_{tin}(T_F-T_{tin})}[/tex]
Thus, when we plug in, we obtain:
[tex]C_{tin}=\frac{75.4g*4.184\frac{J}{g\°C} (27.2\°C-21\°C)}{-55.1g(27.2\°C-90.6\°C)}\\\\C_{tin}=0.560\frac{J}{g\°C}[/tex]
Regards!
Magnesium bromide is an ionic compound with the chemical formula MgBr2, Magnesium is
Answer:
These are Magnesium bromide is MgBr2. “ionic compounds.” When atoms join together, they form either molecules or ionic compounds, depending on whether they are joined by covalent bonds or ionic bonds. ... When atoms join together by ionic bonds, they form “ionic compounds”.
Explanation:
Hope it helps u
FOLLOW MY ACCOUNT PLS PLS
Organisms that do NOT consume other organisms for food are
known as -
-
Answer:
autotrophs
Explanation:
Find the density of an object that has a mass of 12.69 grams and a volume of 3.5cm3
Answer:
3.62 g/cm³
Explanation:
density = mass ÷ volume
Therefore, do 12.69 divided by 3.5
How much heat is needed to raise 125 Grammys of iron from 5.0C to 33C ? The specific heat of iron is 0.450j/g•C
Answer:
ok this might not be right but i think its 1,575??
Explanation:
(125)(28)(0.450)
i think you just multiply the grams, change in temp, then the cp by each other not completely sure tho
Which one of your body cells carries proteins that determine your blood type?
1) All of your cells
2)Skin cells
3) Red blood cells
4)White blood cells
. 2. Which has more atoms: 2.5 mol of calcium carbonate,
CaCO3, or 3.5 mol of calcium hydroxide, Ca(OH)2
Answer:
Calcium hydroxide has more atoms.
Explanation:
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.
Then you can apply the following rules of three:
If 1 mole of calcium carbonate represents 6.023*10²³ atoms, 2.5 mole of calcium carbonate represents how many atoms?[tex]amount of moles of calcium carbonate=\frac{2.5 moles*6.023*10^{23} atoms}{1 mole}[/tex]
amount of moles of calcium carbonate= 1.50575*10²⁴
If 1 mol of calcium hydroxide represents 6.023*10²³ atoms, 3.5 mol of calcium hydroxide represent how many atoms?[tex]amount of moles of calcium hydroxide=\frac{3.5 moles*6.023*10^{23} atoms}{1 mole}[/tex]
amount of moles of calcium hydroxide= 2.10805*10²⁴
2.10805*10²⁴ is greater is 1.50575*10²⁴, so calcium hydroxide has more atoms.
____ are made up of solutes and solvents
A.Suspension
B.Colloid
C.Solutions
If the average rate of sediment accumulation is 3 cm/1000years, how long would be required for sediments to completely bury seamounts 1.5 km high and convert part of the oceanic ridge into a part of the abyssal plains. (Show your work).
Answer:
500,050000 years
Explanation:
Given that :
Rate of Accumulation = 3cm/ 1000 years
Height of seamounts = 1.5km
Representing height of seamounts in cm;
(1.5 *1000 * 100) = 1500150 cm
Time taken = height / rate
Time taken = (1500150 cm / 3cm) * 1000
Time taken = 500,050000 years
22. Sodium-24 has a half-life of 15 hours. How much sodium-24 will remain in an 42.0-g sample after 90 hours?
Answer:
The answer would be 0.65625
Static electricity happens when electrons pass from one object to another, such as from your hair to a comb as you comb your hair. If you were to comb your hair and then hold the comb near your hair, strands of hair would move forward and appear to stick to the comb. How could the interaction between the hair and the comb be described?
They repel each other because they have opposite charges.
They repel each other because they have the same charges.
They attract each other because they have opposite charges.
They attract each other because they have the same charges.
What occurs when solid A, at 50.0°C, is place in liquid B, at 80.0°C?
A Heat energy flows from A to B as the average kinetic energy of the particles in A decreases
B Heat energy flows from A to B as the average kinetic energy of the particles in A increases
CHeat energy flows from B to A as the average kinetic energy of the particles in B decreases
D Heat energy flows from B to A as the average kinetic energy of the particles in B increases
Fill in the chart with the following words:
- Potential energy
- kinetic energy
- Chemical energy
- Joules
- Energy
- thermal energy
Answer:
Energy
potential energy kinetic energy
chemical energy thermal energy
joules
Explanation:
chemical energy is a type of potential energy or stored energy. Heat is a kinetic energy and energy is measured in joules.
The first box is energy. It can be divided into kinetic energy in one side and potential energy in the other side. Here, kinetic energy can be converted to the thermal energy and potential energy can be converted to chemical energy. They are measure in Joules.
What are various forms of energy ?Potential energy and kinetic energy are two forms of energy that are commonly encountered in physics.
Potential energy is energy that an object possesses due to its position, shape, or state. An object can store potential energy when it is moved away from its equilibrium position, such as when a spring is stretched or a book is lifted to a certain height above the ground.
The amount of potential energy an object has is proportional to its mass, height, and the strength of the force that is acting on it. The average kinetic energy of an object is called its thermal energy.
Therefore, first box is energy. It can be divided into kinetic energy in one side and potential energy in the other side. Here, kinetic energy can be converted to the thermal energy and potential energy can be converted to chemical energy. They are measure in Joules.
Find more on potential energy:
https://brainly.com/question/11749818
#SPJ2
Why are isotopes with short half-lives not useful for dating very old rocks?
-because not enough of the parent isotope remains to measure accurately
-because not enough of the daughter product has formed to be detectable
-because neither the parent isotope nor the daughter product will be detectable
-because very old rocks would never have contained these isotopes
Answer:
because not enough of the parent isotope remains to measure accurately. because not enough of the daughter product has formed to be detectable.
Explanation:
Hope it helps
which item is dull.
A. a glass cup
B. a cloth sock
C. a ceramic coffee mug
D. a metal pot
how would you revise the stimulation so users can evaluate the role of human activity in the pH of the ocean
Answer:
Explanation:
If only one parameter can be changed in the simulation, it would be the global temperature. Human activities cause global warming and the temperature rise has caused the polar ice cap to melt. With more fresh water going into the oceans due to melting ice cap, there is a big impact on the pH.
Answer:
Explanation:
increase CO2 in atmosphere - human activity like driving cars n burning fossil fuel releases air polluntants. CO2, NOx n SO2 are all soluble in water n form acids. of the 3, CO2 is the most common pollutant n has the most effect on the pH in oceans.
0.75 moles of an unknown acid are dissolved in water. If 0.42 moles of H3O+ form, what was the percent dissociation of the unknown acid?
Answer:
56 %
Explanation:
The percent dissociation of a weak acid can be defined as:
Moles of weak acid that produced H₃O⁺ species / Total number of weak acid moles * 100%
We are given all the required data to calculate the percent dissociation:
0.42 mol / 0.75 mol * 100 % = 56 %
The percent dissociation is 56%.
6. How are these two isotopes of carbon different from each other? 12C and 14C
Answer:
Carbon-12 and carbon-14 are two isotopes of the element carbon. The difference between carbon-12 and carbon-14 is the number of neutrons in each of their atoms. ... Atoms of both isotopes of carbon contain 6 protons. Atoms of carbon-12 have 6 neutrons, while atoms of carbon-14 contain 8 neutrons.
Explanation:
haha carbon atoms go brrrrr
No link or Files plz i need help with this one i been stuck on it for a long time
Answer:
The particles in a solid are tightly packed and locked in place. Although we cannot see it or feel it, the particles are moving or vibrating in place.
Answer:
molecules in a solid are tightly packed together and vibrate about their fixed positions.
Explanation:
there is very little movement between molecules in a solid since there is not much space between the molecules, hence the slight vibrations.
i hope this helps! :D
As the loudness of the sound input increases, the up and down motion of the membrane covering the can _________
increases
decreases
stay the same
Answer:
decrease!
Explanation:
The fact that loudness of the sound input increases, its starts to move. Each movement pushes the membrane down. Therefore, it decreases. Your welcome !
How many atoms are in 9.95 moles of iron?
How many molecules are in 0.03 moles of Carbon dioxide?
How many moles are found in 7.20 x 1023 atoms of platinum?
Answer:
59.92 × 10²³ atoms are in 9.95 moles of iron
1.8 ×10²² molecules are in 0.03 moles of Carbon dioxide
1.19 moles are found in 7.20 x 10^23 atoms of platinum
The volume of 3.2 moles of nitrogen gas inside a canister is 1.5L. The canister
volume is reduced to 0.3L. How many moles of nitrogen were released?
Answer:
2.56 moles of nitrogen was released.
Explanation:
We'll begin by calculating the final moles of nitrogen in the canister. This can be obtained as follow:
Initial mole (n₁) = 3.2 moles
Initial volume (V₁) = 1.5 L
Final volume (V₂) = 0.3 L
Final mole (n₂) =?
V₁/n₁ = V₂/n₂
1.5 / 3.2 = 0.3 / n₂
Cross multiply
1.5 × n₂ = 3.2 × 0.3
1.5 × n₂ = 0.96
Divide both side by 1.5
n₂ = 0.96 / 1.5
n₂ = 0.64 mole
Finally, we shall determine the number of mole of nitrogen that was released. This can be obtained as follow:
Initial mole (n₁) = 3.2 moles
Final mole (n₂) = 0.64 mole
Amount released =?
Amount released = n₁ – n₂
Amount released = 3.2 – 0.64
Amount released = 2.56 moles
Thus, 2.56 moles of nitrogen were released.
What is a bengal cat mixed with to make it a hybrid
Answer:
A Bagel Cat
Explanation:
Answer:
the spotted Egyptian Mau, with the Asian leopard cat.
Convert 3.00 moles As2S3 to grams.
Answer:
298.99 , = 738.39
Explanation:
hope it help you
to gain the answer
help me how to do this
Answer:
sry i don't know that language
Calculate the volume of carbon dioxide given off at r.t.p. when 0.9g of glucose ferments.
C6H12O6 (aq) = 2C2H5OH (aq) + 2CO2 (g)
Answer:
2H+(aq) + CaCO3(s) → Ca2+(aq) + H2O(l) +. CO2(g). [ 2]. Award [1] for correct reactants and products. Award [1] if the ... Exercises. 1 Reaction gives off a gas: change in volume could be measured.
How to know the state of elements in a reaction
Answer:
each compound or molecule is indicated in subscript next to the compound by an abbreviation in parentheses. For example, a compound in the gas state would be indicated by (g), solid (s), liquid (l), and aqueous (aq).
Explanation:
Illustrating Mechanical Waves
TASK: Create a collage to describe and illustrate how a medium may move and transfer energy in a transverse and compressional/longitudinal wave.
Mechanical waves are waves that transfer energy through a medium (matter). The medium can be a solid, liquid or a gas. A medium in a mechanical wave can move transversely , in a surface wave or Longitudinally. Illustrate the medium movement in a transverse wave and in a compression wave. Below is a checklist/guide for how you will be evaluated for this task.
Illustrate a transverse wave that progressively changes with at least 3 distinguishable
properties: Maximum Points: 60
Labels the crest and the trough.
Labels a point at which the energy of the wave is high.
Labels a point at which the energy of the wave is low.
Label the amplitude, wavelength and identify the frequency of the wave
Draw an arrow to indicate the direction that the medium moves.
Draw an arrow to indicate the direction that the wave moves.
Provides description of your wave in terms of wavelength (long, short), frequency (high, low and the amount in Hertz-Hz) amplitude (high, low)
Identify a measured wavelength and amplitude.
Lastly, have a title and the definition of a transverse wave.
YOU MUST HAVE THE FOLLOWING: 5 points each
Uses color.
Uses a color coded system.
Provides a legend/key for the illustration.
Illustration of a Longitudinal/Compressional Wave that changes in energy
Maximum Points 40
Labels the compressions.
Labels the rarefactions.
Identify the point at which the energy of the wave is high.
Identify the point at which the energy of the wave is low.
Draws an arrow to indicate the direction that the medium moves.
Draws an arrow to indicate the direction that the wave moves.
Lastly, have a title and the definition of a compressional/longitudinal wave.
YOU MUST HAVE THE FOLLOWING: 5 points each
Uses color.
Uses a color coded system.
Provides a legend/key for the illustration.
Transverse wave:
⇨- the way the wave is moving
⟶- Medium - the material it is traveling through
冖- Wavelength - the distance from crest to crest
C - Crest - the highest point on a wave
T - trough - the lowest part on a wave
↕️ - Amplitude - the distance from rest to crest
ྊ - (tinfoil)Wave
Description:
In the beginning of the wave the wavelength is short and the frequency is high so is the energy.and the amplitude is low *i believe* And after the mark of T shown on the image the wavelength is long and the frequency is low and so is the energy and the amplitude is high *i believe*.Amplitude and wavelength are both measures of distance.
Longitudinal/Compressional Wave:
KEYS:
⟶-medium - the material it is traveling through
⇨-way the wave is moving
冖-wavelength - the distance from crest to crest
R -Rarefaction - the opposite of compression
C-Compression - particles are closest together
