Answer: [tex]6.047\times 10^{23}[/tex] atoms in 1.004 mol of arsenic
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the atoms, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given atoms}}{\text {avogadro's number}}[/tex]
[tex]1.004=\frac{x}{6.023\times 10^{23}}[/tex]
[tex]x=1.004\times 6.023\times 10^{23}=6.047\times 10^{23}[/tex]
Thus there are [tex]6.047\times 10^{23}[/tex] atoms in 1.004 mol of arsenic
hurry please Which of the following is a compound?
CO2
Ne
O2
P4
Answer:
p4
Explanation:
Can someone help me with these two questions
why can mosquitos stand on water?
A-The mosquito is able to walk on the water due to the attraction between multiple water molecules, creating surface tension.
B-The mosquito is able to walk on the water due to the attraction between water molecules and other non-water molecules, creating surface tension.
Answer:
Mosquitos can stand on water because;
A. The mosquito is able to walk on the water due to the attraction between multiple water molecules, creating surface tension
Explanation:
Surface Tension is the surface property of a liquid which is due to the cohesive forces of attraction between its molecules, that enables it to withstand an external shearing force
The molecules in a liquid maintain a cohesive force between adjacent molecules that keeps all the molecules together such that the liquid has a defined volume
On the surface of the liquid, the cohesive forces between the molecules are shared by only between the adjacent molecules and molecules which are under the surface, and therefore, the attraction is much stronger such that the surface of the liquid is in tension, which is called the surface tension of the liquid
Therefore, the mosquito is able to walk on the water due to the attraction between multiple water molecules, creating surface tension.
help me please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Which products would form if chlorine gas was bubbled through a solution of sodium bromide?
a. Na and BrCl
b. Na snd BrCl2
c. Na and Br2
d. Na(cl)2 and Br2
Answer:
NaCl and Br2
Explanation:
Edge 2020
Answer:
The Answer is C: Na and Br3
Explanation:
The compound F2O has two lone pairs on the central oxygen atom. What's the structure of an F2O molecule? Is this compound polar or non-polar? Question 1 options: A) Bent or angular, polar B) Trigonal planar, polar C) Bent or angular, non-polar D) Trigonal planar, non-polar
Answer: A) Bent or angular, polar
Explanation:
The central atom oxygen has two lone pairs and two bond pairs in [tex]OF_2[/tex]. The number of electron pairs are 4, that means the hybridization will be [tex]sp^3[/tex] and the electronic geometry of the molecule will be tetrahedral. But as there are two lone pair of atoms around the central oxygen atom, repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be bent shape.
The compound [tex]OF_2[/tex] is polar as the net dipole moment of oxygen - fluoride bonds do not cancel each other out.
What are the homologous series?
Explanation:
Homologous series are the series belonging to a series of aliphatic organic compounds that differ only by the addition of a CH2 group
Hope it will help :)❤
A student claims that a large percentage of water on Earth is immediately available to drink. Is he correct? Why or why not?
Answer:
No, the student is not correct. The earth may have a lot of water... but not every part of water is drinkable. Most water is filled with bacteria and or viruses making it not suitable to drink! :)
Explanation:
HOPE THIS HELPS! BRAINLIEST? :)
How much energy is required to melt 2 kg of copper? Use the table below and
this equation: Q = mLfusion
A. 125.6 kJ
B. 9460 kJ
C. 414 kJ
D. 4730 kJ
Answer:
C. 414 kJ
Explanation:
Given parameters:
Mass of copper = 2kg
Unknown:
Amount of energy required to melt the copper = ?
Solution:
To solve this problem, we use:
Q = m L
m is the mass
L is the latent heat of fusion of copper = 207kJ/kg
So;
Q = 2 x 207 = 414kJ
In an electrically neutral atom of any element, there are equal numbers of
A. Protons and neurons.
B. electrons and procons.
C. electrons and neurrons.
D. atomic number and atomia mess. 5
Answer:
B. electrons and protons.
Explanation:
In an electrically neutral atom of any element, there are equal number of protons and electrons in the atom.
Protons are the positively charged particles in an atom.
Electrons are the negatively charged particles within the atom.
When the number of protons and electrons are the same or equal, the atom is neutral.
But when there is an imbalance, an ion results.
Why do scientist use the scientific method
Answer:
B
Explanation:
scientists always look for evidence
Answer:
Yea its B
Explanation: The person above me legit toke the answer out of my mouth
Apollo 11 made a ______ landing.
Answer:
Apollo 11 made a capsule landing
Explanation:
Answer: i don’t know what type of landing you mean
Explanation:
They did a lunar landing then reentry and then capsule landing.
3. A property of acids is that they taste sour. A
property of bases is that they feel slippery. Would
you use either of these properties to identify an
unknown substance? Why or why not?
Explanation:
Touching or tasting these unknown substances could be lethal or cause severe burns to your skin, so it is advisable to use other methods to identify substances.
A sample of methane gas collcted t a pressure of 0.0884 atm and a temperature of 6.00 C is found to occupy a volume of 26.5 L. How many moles of CH4 gas are in the sample? ____ mol
Answer:
0.1mole
Explanation:
Given parameters:
Pressure = 0.0884atm
Temperature = 6°C = 6 + 273 = 279K
Volume occupied = 26.5L
Unknown:
Number of moles = ?
Solution:
To solve this problem, we are going to use the ideal gas equation:
PV = nRT
P is the pressure
V is the volume
n is the number of moles
R is the gas constant = 0.082atmLmol⁻¹k⁻¹
T is the temperature.
Insert the parameters and solve for n;
0.084 x 26.5 = n x 0.082 x 279
n = 0.1mole
what volume (in L) of ethane (C2H6) will be required to produce 42.5 L of carbon dioxide in the reaction below?
2C2H6(g)+7O2(g)->4CO2(g)+6H2O(g)
Answer:
21.25
Explanation:
Sulphur is found in many forms in the nature. S2, S6 and Ss being some of them. What can we say
will certainly be common among these forms of sulphur?
(A) They will exhibit same physical properties
(B) They will exhibit same chemical properties
(C) Sulphur atoms in each will be identical
(D) All of the above
Answer:
What can be said about these common forms of sulphur is that;
(B) They will exhibit same chemical properties
Explanation:
Allotropy is the property of an element to exist in two or more forms in the same physical state
Allotropes have several similar chemical properties but differ in their physical properties, such as the white, pale yellow to totally colorless diamond and the gray graphite
Sulphur can exist in several allotropic forms, and carbon is the only element that has more allotropes than sulphur
The sulphur allotropes includes S₂, S₆, and S₅ have similar chemical properties but different physical properties.
The correct option is;
What can be said about these common forms of sulphur is that they have the same chemical properties
Can somebody Please Help
Answer:
5425440 μm
Explanation:
From the question given above,
Length (in ft) = 17.8 ft
Length (in μm) =?
Next, we shall convert 17.8 ft to in. This can be obtained as follow:
1 ft = 12 in
Therefore,
17.8 ft = 17.8 ft × 12 in / 1 ft
17.8 ft = 213.6 in
Next, we shall convert 213.6 in to cm. This can be obtained as follow:
1 in = 2.54 cm
Therefore,
213.6 in = 213.6 in × 2.54 / 1 in
213.6 in = 542.544 cm
Finally, we shall convert 542.544 cm to μm. This can be obtained as follow:
1 cm = 10⁴ μm
Therefore,
542.544 cm = 542.544 cm × 10⁴ μm / 1 cm
542.544 cm = 5425440 μm
Therefore, 17.8 ft is equivalent is equivalent to 5425440 μm
- Is energy absorbed or released by a material during the phase change from a solid to a liquid?
A)Absorbed
B)Released
Answer:
A) Abosrbed
Explanation:
The change is endothermic, meaning the material absorbs energy when it changes its phase from a solid to a liqiud.
The substance that cannot be broken down into a simpler form by ordinary chemical means is called a __ ?
Answer:
Elements
Explanation:
An element is any substance that cannot be broken down into simpler form by ordinary chemical means.
Elements are distinct substances that cannot be split up into simpler substances. .
Such substances consist of only one kind of atom. There are over hundred elements known till date. Elements are made up of unique atoms. In a chemical reaction, elements combines and rearranges.
What is the molar mass of carbon?
Turning on your X-Box is an example of___ energy turning into ___ energy.
A.electrical,nuclear
B.nuclear,sound
C.electrical,light
D.electrical,chemical
Answer:
electrical --> light
Explanation:
Can someone help
Me out pls if your good at chemistry
Give the name of one of the 3 common acids used in chemistry
Answer:
Common strong acids include hydrochloric acid, sulfuric acid, phosphoric acid, and nitric acid. Common weak acids include acetic acid, boric acid, hydrofluoric acid, oxalic acid, citric acid, and carbonic acid.
How can calcium oxide change directly to limewater?
Wants equation and observation
Answer:
Lime(Calcium Oxide) is a white solid with strongly basic properties.Lime reacts readily with water to produce slaked lime,which is the chemical compound calcium hydroxide.....
When carbon dioxide gas is passed through or over limewater,it turns milky due to the formation of calcium carbonate.
the rate of effusion of co2 gas through a porous barrier is observed to be 9.31x 10^-4 mol/h. under the same conditions, the rate of effusion of N2 gas would be _______ mol/h
Answer:
[tex]1.167\times 10^{-3}\ \text{mol/h}[/tex]
Explanation:
[tex]R_1[/tex] = Rate of diffusion of [tex]CO_2[/tex] = [tex]9.31\times 10^{-4}\ \text{mol/h}[/tex]
[tex]R_2[/tex] = Rate of diffusion of [tex]N_2[/tex]
[tex]M_1[/tex] = Molar mass of [tex]CO_2[/tex] = 44.01 g/mol
[tex]M_2[/tex] = Molar mass of [tex]N_2[/tex] = 28.0134 g/mol
From Graham's law we have the relation
[tex]\dfrac{R_1}{R_2}=\sqrt{\dfrac{M_2}{M_1}}\\\Rightarrow R_2=\dfrac{R_1}{\sqrt{\dfrac{M_2}{M_1}}}\\\Rightarrow R_2=\dfrac{9.31\times 10^{-4}}{\sqrt{\dfrac{28.0134}{44.01}}}\\\Rightarrow R_2=1.167\times 10^{-3}\ \text{mol/h}[/tex]
The rate of effusion of the [tex]N_2[/tex] gas would be [tex]1.167\times 10^{-3}\ \text{mol/h}[/tex].
10 While a student is holding a piece of metal in her hand, her hand gets colder. What happens to the temperature of the metal? * m (6 Points) A. The piece of metal will get warmer because some thermal energy is transferred from the metal to the student's hand. B. The piece of metal will get warmer because some thermal energy is transferred from the student's hand to the ON metal. C. The piece of metal will stay at the same temperature because an equal amount of thermal energy is exchanged between the student's hand and the metal. D. The piece of metal will stay at the same temperature because thermal energy is not transferred between the student's hand and the metal.
Answer:
B
Explanation:
thermal energy is the energy between one object to another
PLZ HELP!!!!!asapnow
Answer:
Friction of wind against the ocean surface
A model that describes the formation, ______________, and reformation of rocks.
why do stars appear to be bigger in the night?
Answer: in the daytime the sun is out so the stars are not visible becuase the suns reflection! At night When you gaze at the constellations, every star produces an image that's the same size, but your retina isn't sensitive enough to respond to the outer parts of those images except for the brighter stars — which therefore look bigger than the fainter ones.
Explanation:
This is what I found on goog.le a while ago now it might actually help if I’m wrong I apologiz, I hope this was your quistion!
I traveled for 0.5 hr at 80 km/h. How far did I travel?
Answer:
[tex]Distance = 40km[/tex]
Explanation:
Given
[tex]Speed = 80km/hr[/tex]
[tex]Time = 0.5hr[/tex]
Required
Determine the distance covered
Distance is calculated as:
[tex]Distance = Speed * Time[/tex]
Substitute values for Speed and Time
[tex]Distance = 80km/hr * 0.5hr[/tex]
[tex]Distance = 80km * 0.5[/tex]
[tex]Distance = 40km[/tex]
Hence, you travelled 40km
