A student dissolves 8.00 g of NH4NO3(s) in 100. g of H2O(l) in a coffee-cup calorimeter. Based on the initial and final temperatures of the mixture in degrees Celsius shown in the diagram above the laboratory setup, what is the calculated ΔT of the water reported to the appropriate number of significant figures?
1pt Which of the following is NOT true about the role tectonic forces play in the rock cycle?
O A. When plates pull apart, rocks melt, and magma forms igneous rocks.
O B. When plates crash together, rocks are buried and form metamorphic rocks.
O c. When plates slide over and under each other, the heat and pressure form igneous rocks.
OD. When rocks push upward and form mountains, the erosion of the mountains can produce sediment.
Tectonic forces do not cause plates to slide over and under each other, to produce heat and pressure which forms igneous rocks
What is the rock cycle?The rock cycle is a cycle which describes how the three basic rock types are related and how earth processes convert one rock type into another over geologic time.
Plate tectonic forces together with weathering and erosional processes, are responsible for the rock cycle.
Tectonic forces play the following roles in rock cycle:
When plates pull apart, rocks melt, and magma forms igneous rocks.When plates crash together, rocks are buried and form metamorphic rocksWhen rocks push upward and form mountains, the erosion of the mountains can produce sedimentTherefore, the statement that when plates slide over and under each other, the heat and pressure form igneous rocks is not True.
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whoever answers first ill give brainliest! ANSWER QUICK PLS
Mr. B weighs out 22.8 grams of cobalt (II) chloride, then dissolves that CoCl2 in 500 mL of water. What is the concentration of his cobalt (II) chloride solution?
a. 3.51 M CoCl2
b. 0.351 M CoCl2
c. 0.176 M CoCl2
d. 0.0456 M CCl2
thank you so much!
Answer: b
Explanation: had the same question
1. Ammonia gas occupies a volume of 450. ml at a pressure of 720, mm Hg. What
volume will it occupy at standard pressure?
Answer:
720+450 = 1170 it's 1170
426.32mL (rounded)
The formula for finding V2 is P1 • V1/P2 and since standard pressure (1atm) is equal to 760 P2 would be 760.
720mmHg • (450mL/760mmHg) = 426.32mL
How many molecules are in 10 moles of H2
The number of molecules in one mole of hydrogen gas is 6.02 × 10²³ . The number of molecules in 10 moles of hydrogen gas is then 6.022 ×10²⁴.
What is one mole?Any substance that contains 6.022 × 10²³ number of atoms is called ne mole of that substance. This number is called Avogadro number. Hence, one mole of every elements contains Avogadro number of atoms.
Hydrogen is the first element in periodic table. It is an alkali metal. The number of molecules in one mole of H₂ is equal to Avogadro number. Mass of a molecule with one mole of amount is called its molecular mass.
Number of molecules of H₂ in one mole = 6.02 × 10²³
Then number of molecules in 10 moles is Avogadro number times the number of moles.
= 10 × 6.022 × 10²³ = 6.022 ×10²⁴ molecules
Therefore, 10 moles of H₂ contains 6.022 ×10²⁴molecules..
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what is haber's process?
Answer:
method for procuring ammonia
Explanation:
In the Haber process, atmospheric nitrogen is converted to ammonia by reacting it with hydrogen (H2)
What happens if you mix Hydrochloric Acid (HCl) and Sodium Bicarbonate (NaHCO3 ) together?
Answer:
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Explanation:
A saturated solution of sodium bicarbonate is reacted with hydrochloric acid to form carbon dioxide gas.
Answer:
Table salt forms as well as water and carbon dioxide
Explanation:
NaHCO3 (aq) + HCl (aq) --> NaCl (aq) + CO2 (g) + H2O (l)
If you are cooking bread, and you weigh the dough before baking and weigh the bread after baking, but they weigh 2 different amounts, how is the law of conservation of mass still being followed?
Answer:
jayfeather friend me
Explanation:
In a toasty kitchen, your dough may proof in as little as an hour (or less!). When the temperatures dip, it can take much longer—upwards of two or even three hours.
How many cm3 are contained in 3.83 x 107 mm3?
Answer:
3.38 x 10⁴cm³
Explanation:
Given that:
Volume of the substance = 3.83 x 10⁷mm³
The problem entails use to convert from mm³ to cm³;
1000mm³ = 1cm³
So;
3.83 x 10⁷mm³ will produce [tex]\frac{ 3.83 x 10^{7} }{1000}[/tex] = 3.38 x 10⁴cm³
Science is the process of observing and making sense of the natural world.
True or False
A student rings a brass bell with a frequency of 300 Hz. The sound wave
travels through brass, air, and glass. What is the wavelength of the wave in
brass?
Medium
Wave speed
(m/s)
Brass
4,700
Air
346
Glass
5,640
A. 0.64 m
B. 1.6 m
C. 0.064 m
D. 16 m
The wavelength of the wave in brass medium, given that the wave has a frequency of 300 Hz is 16 m (Option D)
How do I determine the wavelength in brass?The wavelength of a wave is defined according to the following formula:
Velocity (v) = wavelength (λ) × frequency (f)
Divide both sides by frequency
Wavelength (λ = Velocity (v) / frequency (f)
With the above formula, we can obtain the wavelength of the wave in the brass medium. Details below:
Frequency (f) = 300 HzWave speed in brass (v) of = 4700 m/sWavelength in brass (λ) = ?Wavelength (λ = Velocity (v) / frequency (f)
Wavelength in brass = 4700 m/s / 300 Hz
Wavelength in brass= 16 m
Thus, we can conclude that the wavelength is 16 m (Option D)
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how many atoms are in 7.3 moles of arsenic atoms? 1 mol = 6.02 x 10^23 particles
Answer:
6,9
Explanation:
18. How is the kinetic energy of molecules changing when the molecules move faster?
The kinetic energy ...
a
is not changing
b
depends on the molecules.
С
is decreasing.'
d
is increasing
Scroll for more
Answer:
d
Explanation:
the more movement the more energy
Calculate the molar concentration of 4.75 moles of NaCl in
0.50 liters of water?
Answer:
9.5 m
Explanation:
First, divide 4.75 m by the 0.50 l
4.75/0.50
This leaves you with 9.5 m
Which does NOT affect the speed of an object that is pushed
Answer:
balanced forces do not affect the motion of the object. Unbalanced forces affect the motion and velocity of an object.
6CO2 + 6H20 + Energy
Co H1206 + 602
D. heat of reaction
O C. thermal reaction
B. endothermic reaction
A. exothermic reaction
Which is an acceleration?
A. Flying at 200 miles/hr
B. Speed changing from 2 km/hr to 5 km/hr
C. Moving north at 40 km/hr
D. Moving 8 meters in 2 seconds
Give 2 reasons why is copper used for electrial wires
Answer:
Copper electrical wires are safer to use than wires made of most other conductive metals because they are resistant to heat. As you can see, copper is the preferred metal for electrical wires for several reasons. It has high electrical conductive; it's inexpensive; it's ductile; and it's thermal resistant.
is pH 6 a weak or strong acid?
Answer:
6 pH is a weak acid
Explanation:
Generally, a strong acid has a pH of about zero to 3.
The pH scale typically ranges from 1 to 14, with lower numbers representing acids, higher numbers, bases. Neutral liquids like water have a pH of 7.
(Please heart the answer if you find it helpful, it's a motivation for me to help more people)
POV: You buy a composite cup at the store. Explain the reason for your decision.
I think this is chemistry I have no clue.
Answer:
i bought it cuz i need a cup?
Explanation:
Answer:
Best chemistry ever tho
Explanation:
LOL
Please help I will give brainliest
Answer:
Explanation:
c. - vaccine
b. - immunity
d. - phagocyte
f. - b cell
e. - t cells
a. active immunity
Can someone help me with this questions. What do these two photos have in common?
How many moles are 3.21x10^28 moles of N2
Answer:
number of moles =
[tex]53.3 \times 10 {}^{3} mol[/tex]
Explanation:
here's the solution in attachment.
Answer Fast Please!!!
Which of the following statements is true?
The Periodic Table is organized in order of atomic number.
Substances in a mixture lose their unique properties.
Elements in the same period have similar properties.
Heterogenous mixtures are also called solutions.
Answer:
I believe it is A. The Periodic Table is organized in order of atomic number.
Explanation:
True/False: There are about 400 known elements
Answer: false
Explanation:
there are no more then 112 known elements.
Answer:
false
Explanation:
their are only 118 element
please help this will help my grade a lot
Answer:
a- customary systems..
Scientists say that the solar system formed from______.
Answer:
a rotating disk of dust and gases
Explanation:
brainliest?
Answer: scientists believe that the solar system was formed when a cloud of gas and dust in space was disturbed, maybe by the explosion of a nearby star (called a supernova). ... Squeezing made the cloud start to collapse, as gravity pulled the gas and dust together, forming a solar nebula.
Explanation:
How many moles of oxygen are in 2.00 moles of NaCIO4?
Answer: 8 Moles of Oxygen
Explanation: The formula shows that there are (exactly) 4 oxygen atoms in each mole or formula unit. Therefore 4 * 2.00 = 8.
When chlorine is added to sodium bromide solution, the mixture turns brown. What type of reaction has taken place?
Answer:
A displacement reaction
Explanation:
This is because the chlorine reacts with the sodium bromide, forcing it to go brown.
I hope this helps, good luck! (✿◡‿◡)
When chlorine is added to a solution of sodium bromide (either as a gas or dissolved in water), the bromine is replaced by the chlorine.
What do you mean by Solution?In chemistry, a solution is a homogeneous mixture of two or more compounds in their relative proportions that can be continually altered up to what is referred to as the limit of solubility.
Although the word "solution" is typically used to refer to the liquid state of matter, solutions of gases and solids are also possible.
When chlorine is added to a solution of sodium bromide (either as a gas or dissolved in water), the bromine is replaced by the chlorine. Because chlorine is more reactive than bromine, sodium bromide loses its bromine content. The mixture darkens to brown. The bromine has been displace, giving this colour of brown.
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the answers is cacih2
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