Answer:
0.59 moles
Explanation:
Given mass = 27.4 g
Molar mass of NO₂ = 46 g/mol
We need to find the number of moles. We know that,
No of moles = given mass/molar mass
Put all the values,
[tex]n=\dfrac{27.4}{46}\\\\n=0.59[/tex]
Hence, there are 0.59 moles of NO₂ .
Ca(OH)2+CO2=___+____
Answer:
CaCO3 + H2O
Step by step explanation
Help me with chemistry! I got this answer wrong , what would be the right one?
Answer:
I probably think it's to achieve a higher energy state
Explanation:
-
HELP PLS!!!!!
Calculate the mass percentage of water in the formula Na2OCO3 x 10H20
Answer:
The mass percentage of water of crystallization in washing soda is 62.9 %. But the molar mass of Na2 CO3 • 10H2 O is 286.1412 g/mol and the Na2CO3 • 10H2O % by mass H2O.
SO your full answer is 286.1412 g/mol
Explanation:
plz brian list
Organize the following list of atoms from highest to lowest Atomic Radius:
Sulfur, Aluminum, Sodium, Chlorine, Argon, Silicon
What is the new concentration of a solution of CaSO3 if 10.0 mL of a 2.0 M CaSO3 solution is diluted to 100 ml?
Answer: The new concentration of a solution of [tex]CaSO_{3}[/tex] is 0.2 M 10.0 mL of a 2.0 M [tex]CaSO_{3}[/tex] solution is diluted to 100 mL.
Explanation:
Given: [tex]V_{1}[/tex] = 10.0 mL, [tex]M_{1}[/tex] = 2.0 M
[tex]V_{2}[/tex] = 100 mL, [tex]M_{2}[/tex] = ?
Formula used to calculate the new concentration is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\10.0 mL \times 2.0 M = M_{2} \times 100 mL\\M_{2} = 0.2 M[/tex]
Thus, we can conclude that the new concentration of a solution of [tex]CaSO_{3}[/tex] is 0.2 M 10.0 mL of a 2.0 M [tex]CaSO_{3}[/tex] solution is diluted to 100 mL.
The interaction of the skeletal and muscular systems to create movement and locomotion is regulated by which organ system?
Answer:
The muscoloskeletal system
Explanation:
The musculoskeletal system is made up of the body's bones (the skeleton), muscles, cartilage, tendons, ligaments, joints, and other connective tissue that supports and binds tissues and organs together. Its primary functions include supporting the body, allowing motion, and protecting vital organs.
are manifested as
instantaneous charge differences due
to molecular interactions.
Dipole-dipole
interactions
Dispersion
forces
Hydrogen
bonds
dipole: dipole interactions
- dispersion forces (London forces)
- hydrogen bonds
as the attractive forces between molecules becomes larger, it takes more energy to separate them
- as a result, vapor pressures, boiling points and melting points will be larger
occur between molecules that have a permanent dipole moment
- H-Cl----H-Cl
Balancing equations helps please !!
Explanation:
3. 2AlBr3 + 3k2SO4----------> 6KBr + Al2(SO4)3
stay safe healthy and happy.Calculate the weight of keame if he has potential energy of 67J and standing at a hieght of 10m.(take g100m/s)
Answer:
height(h)=10 m
acceleration due to gravity (g)=10 m/s^2
mass (m)=?
potential energy=67
or,mgh= 67
or,m×10×10=67
or,m=67/100
or,m=0.67 kg
Therefore,m= 670 grams
Where does much of our history of Precambrian rocks come from? fossils on the rock surface ores mined from shields ash taken from volcanoes trenches on the sea floor
Answer:
Ores mined from shields.
Explanation:
Ores mined from shields are the source from which we get the history of Precambrian rocks. The Ores from shield experience the Precambrian era so that's why its rocks provides information about that era. The Precambrian supereon is the division of the geological time scale which is the first and longest stage in the history of the Earth which also includes the Hádic, Archaic and Proterozoic eons.
how many moles of ions is in Magnesium chloride?
EMERGENCY HELP ME OUT
Answer:
D, The volume will be multiplied by a factor of 4
Explanation:
First find the height
V = π(r^2)h
Plug in what we know
83 = π(3^2)h
83 = π(9)h
83 = (9π)h
9[tex]\pi[/tex] = 28.27
83/28.27 = (28.27)h/28.27
h = 2.94
Then find the volume of the new can by doubling the radius
3 x 2 = 6
r = 6
V = π(r^2)h
V = π(6^2)2.94
V = π(105.84)
V =332.51
For the first one, they rounded to the nearest whole #, so let's do the same.
V = 333
Then divide 333 by 83 to get 4
Therefore, the volume will be multiplied by a factor of 4
The back of a water droplet acts as a mirror. When light hits the back of the water droplet, it bounces back to our eyes. This is called ____________.
1. Suppose the mechanical advantage of a machine is 4, and the input force is 20 N.
What is the output force?
0 16 N
0 24 N
80 N
O5N
Answer:
80 N
Explanation:
you can multiple
force equal to mass x gravity
A scientist plans the react 9.0x10^-2 L NO held at a pressure of 200.0kPa and a temperature of 20.0 C with excess hydrogen. How many moles of nitrogen gas will be produced
Answer:
[tex]n_{N_2}=0.00369molN_2[/tex]
Explanation:
Hello there!
In this case, by firstly setting up the described chemical reaction, we are able to write:
[tex]2NO(g)+2H_2(g)\rightarrow N_2(g)+2H_2O(g)[/tex]
Thus, given the pressure (convert to atm), volume and temperature (convert to K) we can calculate the moles of NO:
[tex]n=\frac{PV}{RT}\\\\n=\frac{200.00/101.325atm*0.090L}{0.08206\frac{atm*L}{mol*K}*(20.0+273.15)K} \\\\n=0.00738molNO[/tex]
Next, we use the 2:1 mole ratio of NO to N2 to obtain the moles of nitrogen gas that will be produced:
[tex]n_{N_2}=0.00738molNO *\frac{1molN_2}{2molNO} \\\\n_{N_2}=0.00369molN_2[/tex]
Regards!
Which statement accurately describes the formation of a covalent bond?
a. Protons are shared between atoms.
b. Electrons are shared between atoms.
c. Protons are transferred from one atom to another.
d. Electrons are transferred from one atom to another.
Answer: b. Electrons are shared between atoms
Explanation: electrons are shared, forming molecules, covalent compounds have weaker forces holding the molecules together
To determine the molar mass of an element, one must know the element's
a. number of isotopes.
b average atomic mass
c avogradro constant
d atomic number
Answer:
d
Explanation:
from you know the atomic number it should be easy to find
To determine the molar mass of an element, one must know the element's atomic number. Therefore, option D is correct.
What is the atomic number ?An element's atomic number (Z) is the number of protons in the nucleus of each atom of that element. This means that the number of protons is the feature that distinguishes each element from all others. Elements differ based on their atomic number.
Because the combined masses of protons and neutrons account for nearly all the mass of a given atom, the atomic mass of a single atom can be calculated by adding the total number of protons and neutrons of that particular isotope.
The atomic mass of any element on the periodic table can be used to calculate its molar mass.
Thus, option D is correct.
To learn more about an atomic number, follow the link;
https://brainly.com/question/16858932
#SPJ6
What controls the DNA molecule?
Answer:
nucleotides
Explanation:
The four types of nitrogen bases found in nucleotides are: adenine (A), thymine (T), guanine (G) and cytosine (C). The order, or sequence, of these bases determines what biological instructions are contained in a strand of DNA. ... DNA is made of chemical building blocks called nucleotides.
hope that helped :)
What are mycelium
??????????
Answer:
Mycelium is a group of hyphae which are fungus.... these are like roots in structure
Answer:
A mycelium is the vegetative part of a fungus, consisting of a network of fine white filaments
Explanation:
Help needed ASAP, I will mark your answer as brainliest.
What is the mass number of a atom with 10 protons and 13 neutrons
A good year blimp (a huge airship) is filled to a
volume of 1,800L at a temperature of 35°C. As
the weather changed the blimp is then cooled
at constant pressure to a temperature of -46°C.
What is the final volume of the blimp?
Answer:
V₂ = 1326.62 L
Explanation:
Given that,
Initial volume, V₁ = 1800 L
Initial temperature, T₁ = 35°C = 308 K
Final temperature, T₂ = -46°C = 227 K
We need to find the final volume of the blimp. The relation between volume and temperature is given by :
[tex]\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{1800\times 227}{308}\\\\V_2=1326.62\ L[/tex]
So, the final volume of the blimp is 1326.62 L.
Can someone help me please? I’d appreciate it! Also please do not send me a link or delete your answer! Thanks
The piston of an internal combustion engine
compresses 218 mL of gas. The final pressure
is 15 times greater than the initial pressure.
What is the final volume of the gas, assuming
constant temperature?
Answer in units of mL.
Answer:
14.53ML
Explanation:
V1=218
V2=?
P2=15p1
USING BOYLE'S LAW
P1V1=P2V2
V2=P1V1/P2=P1(218ML)/15P1
=14.53ML
Condensation
11.What is condensation?
(1 Point)
change from solid to liquid
change from solid to gas
change from liquid to solid
change from liquid to gas
change from gas to solid
change from gas to liquid
12.What happens to the motion of particles after condensation?
(1 Point)
faster
slower
13.What happens to the kinetic energy of particles after condensation?
(1 Point)
increased
decreased
14.What happens to the distance between particles after condensation?Immersive Reader
(1 Point)
smaller
wider
11. change from gas to liquid
12. slower
13. increased
14. smaller
thenks and pls mark me brainliest :))
Provide one example where a neutralization reaction is undesired/harmful. State the reactants and explain why it is harmful for this reaction to take place.
Answer:
You're in my science class wth
Explanation:
For instance farmers are using basic fertilizers to neutralize an acid soil –which is harmful for the plants- while basic solutions are added in the chimneys of factories to neutralize the acid smoke that they produce –avoiding the catastrophic effects of the acid rains. Acid released in the environment from industry creates acid rain which has many ecological effects. Acid rain makes waters acidic, and causes them to absorb the aluminium that makes its way from soil into lakes and streams. This combination makes waters toxic to crayfish, clams, fish, and other aquatic animals.
find the no of atoms of Fe in 2 moles of Fe
Answer:
1mole of any substance contains 6.022x10²³atoms
2moles of Fe will contain
2x6.022x10²³atoms = 1.204x10²⁴atoms.
Have a Great day!
Which of the following describes the functions of the liver?
I. It cleans the blood by removing wastes and harmful substances.
II. It helps with digestion of food.
III. It produces bile.
I and II
I and III
II and III
I, II, and III
Answer: 2 and 3
Explanation:II and III
Pls answer this Il give brainiest question in picture ty
Answer:
c
Explanation:
troposphere is the answer
A sample of chlorine gas is stored at a temperature of -25oC. If the chlorine gas's temperature is raised to 52oC, its volume increases to 2.60 L. What is the initial volume of the gas?
Answer:
whats ur answer options
Explanation:
...
its b
what the total charge of an atom with 8 protons 10 neutrons and 10 electrons?
Answer:
since an oxygen atom normally has 8 protons and 8 electrons, this ion has 10 electrons (-10 charge) and 8 protons (+8 charge) giving it a charge of -2 (-10 + 8 = -2).
Explanation: