Answer:
it is C
Explanation:i had this on my test and got it right lol
How many chlorine atoms in 3ZnCl2
Answer:
6 Cl atoms
Explanation:
In one molecule of ZnCl2, we have 2 atoms of Cl
Therefore, in 3 molecules of ZnCl2, we'll have 3(2) atoms of Cl = 6 atoms of Cl.
please mark brainliest
Can light move through space even though there are no molecules?
Answer:
This means that waves need a medium to propagate, but light waves propagate where no particles are present. ...
What element am I?
1 valence electrons, 1 energy level
Group of answer choices
H
He
Li
Be
Answer:
H- hydrogen
Explanation: Hydrogen is in the first group meaning that it only has 1 valence electron and 1 energy level
In the process of cooking, making tea, or mixing paint, you combined substances. Sometimes, the act of mixing substances results in the formation of new substances.
If two substances mix and one or more new substances form, a chemical change has occurred. Which event do you think results in a chemical change?
A.
Oil and vinegar mix to make salad dressing.
B.
Copper and zinc mix to make brass.
C.
Salt and water mix to make salt water.
D.
Sugar and water mix to make sugar water.
Answer:
B.
Copper and zinc mix to make brass.
Explanation:
This is the only answer in which a new substance is created, the rest of the choices are just mixtures
is this correct? please check
Answer:
A is the correct option
Explanation:
batteries have chemical energy and will convert to electricity and when reached to bulb, it emits light as electromagnetic rays
What 2 elements are in the same group?
Oxygen and Chlorine
Sodium and Chlorine
Hydrogen and Sodium
Calcium and Helium
Explanation:
hydrogen and sodium are in same froup
I NEED HELP ASAP ! : /
What is the name of the following compound?
CAH₂0?
What is the name of the following compound SO2?
What is the name of the following compound P2F3?
1.calcium monohydroxid
2.sulfur dioxide
3.sry don't know
what is the molecular formula of water
Answer:
your very f,k,n, d,u,m,b
Explanation:
Answer:
H2o
Explanation:
Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.
What are the six physical properties and 2 chemical properties of this image?
Please Help!!!
Answer:
physical - cloth
tree
brick
chair
lights
glass
chemical- fuel
fire
Explanation:
In which of the three states of matter are the particles moving at the greatest speed?
Answer:
Gas(this is because we are only considering that there are 3 states of matter, while in reality there are 5.)
Explanation:
There are actually 4 states of matter excluding a 5th one that has just been discovered, but if we consider that there are only 3 states of matter then the particles move the fastest in gases. As the particles are the furthest apart.
How many moles are in 1.80g of N2?
Answer:
28.0134
Explanation:
Answer:
Explanation:
n=m/Mr
Molar mass =2(14)
n=1.80/28
n= 0.064
why are gases generally collected by downward displacement of water?
A gas produced in a chemical reaction can be collected by water displacement. Because the gas is collected over water, it is not pure but is mixed with vapor from the evaporation of the water. Dalton's law can be used to calculate the amount of the desired gas by subtracting the contribution of the water vapor.
Explanation:
oxygen gas is collected bye the downwards displacement of water. because it is only slightly solube in water and is less dence than water. this is my answer
Which equation is balanced?
Answer:Liquid A: 0.358 g/ml
Liquid B: 0.605 g/ml
Liquid C: 1.677 g/ml
Explanation:
Liquid A: 0.358 g/ml
Liquid B: 0.605 g/ml
Liquid C: 1.677 g/ml
Iron reacts with oxygen gas to produce iron (III) oxide. If there are 52 grams of
iron present in this reaction how many grams of iron (III) oxide are produced
assuming a 100% yield? Also how many liters of oxygen are needed assuming
STP conditions?
Mass of Fe₂O₃ : 74.26 g
Volume of O₂ at STP = 15.624 L
Further explanationReaction
4Fe (s) + 3O₂ (g) ==> 2Fe₂O₃ (s)
mol Fe :
Ar Fe = 56 g/mol
[tex]\tt \dfrac{52}{56}=0.93[/tex]
mol Fe₂O₃ :
[tex]\tt \dfrac{2}{4}\times 0.93=0.465[/tex]
mass Fe₂O₃ :
MW Fe₂O₃ : 159,69 g/mol
[tex]\tt 0.465\times 159,69=74.26~g[/tex]
mol O₂ :
[tex]\tt \dfrac{3}{4}\times 0.93=0.6975[/tex]
volume O₂ at STP(1 mol=22.4 L)
[tex]\tt 0.6975\times 22.4=15.624~L[/tex]
Explain why BH3 is trigonal planar and NH3 is trigonal pyramidal.
Answer:o It is important to realise that mixing will be small unless there are electrons in the 4a1 LUMO, this is why NH3 is pyramidal while BH3 is planar! ... This mixing is very strong and stabilises the 3a1 MO substantially and hence NH3 is trigonal pyramidal and not planar.
Explanation:
What might happen if you mixed a strong acid with an equally strong base?
Question 4 options:
You would wind up with a pH neutral salt and water
The base would destroy the acid.
You would see an explosive chemical reaction.
The acid would destroy the base.
Answer:You'd wind up with a pH-neutral substance.
Can someone help me please ? Click the picture
Answer:
Because it lose detectable mass.
Explanation:
Law of conservation of mass states that substances involved in chemical reaction do not lose or gain any mass. So the above reactions don't demonstrate the law of conservation of mass because it lose mass
Who uses Ionic compounds?
Answer:
scientists
Explanation:
What would be the result on the Insect population if the Bats and Mice were removed?
Answer:
We wouldn't have Coronavirus
Explanation:
HELP PLEASE DUE SOON!!!
calculate the following the correct amount of significant figures 1.25+3.69277+125.993
Answer: 129.93577
Explanation:
There-
Sounds that a person hears that never go away can interfere with studying
and sleeping.
A.True
B.False
Electron configuration
Answer:
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. This is also useful for describing the chemical bonds that hold atoms together.
Can you provide an example for both fission and fusion
why doesn't she want me
Answer:
Who knows...
Explanation:
:( :( :( :( :(
6. What is the wavelength, in nm, associated with a photon of energy of 4.36 x 10-18 J? (4.56 x 101 nm)
The numbers in parenthesis is the answer that the teacher gave but I on't know how to get there. Help please!
Answer:
Explanation:
h= e/v
6.022 x 10^23 = 4.36 x 10^-18/ v
v= 6.58 x 10^15
C= lambda x frequency
3.00 x 10^8= 6.58 x 10^15 x lambda
lambda (y)= 4.56 x 10^-8
Answer:
Explanation:
λ = hc/E
6.626 x 10^-34 J-s x 2.998 x 10^8 m-s^-1
4.36 x 10^-18 J
= 4556.13486239
= 4.56 x 10^1 nm
The chemical equation below shows the burning of magnesium (Mg) with oxygen (O2) to form magnesium oxide (MgO). 2Mg + O2 Right arrow. 2MgO Niven wants to calculate the mass of MgO that is produced by the burning of 28.0 g of Mg. What is the first step in Niven’s calculation?
- Balance the chemical equation.
- Convert grams of Mg to moles.
- Determine whether heat is given off by this reaction.
- Find the number of Mg atoms in the sample.
Answer:
Convert grams of Mg to moles
Explanation:
In stoichiometric calculations, the first thing is always to balance the chemical reaction equation. However, in this particular instance, the equation is already balanced; 2Mg + O2 ---------->2MgO as shown in the question.
Hence, what Niven now has to do is to convert grams of Mg to moles so that the amount of MgO obtained can be calculated and subsequently converted to mass.
0.22g of carbon dioxide are dissolved in 400 cm3 of pure water.
Calculate the concentration in mol/dm3 of the
solution produced.
Answer:
0.0125mol/dm³
Explanation:
Given parameters:
Mass of carbon dioxide = 0.22g
Volume of water = 400cm³
Unknown:
Concentration in mol/dm³ = ?
Solution:
Concentration is the amount of solute dissolved in a solvent.
The formula is expressed as;
Concentration = [tex]\frac{number of moles}{volume}[/tex]
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of CO₂ = 12 + 3(16) = 44g/mol
Number of moles = [tex]\frac{0.22}{44}[/tex] = 0.0005mol
Now,
1000cm³ = 1dm³
400cm³ = [tex]\frac{400}{1000}[/tex] = 0.4dm³
Insert the parameters and solve;
Concentration = [tex]\frac{0.005}{0.4}[/tex] = 0.0125mol/dm³
Determine the pressure change when a constant volume of gas at 1.00 atm is
heated from 293 Kelvin to 303 Kelvin
Hurry please
Answer:
P₂ = 1.03 atm
Explanation:
Given data:
Initial pressure = 1.00 atm
Initial temperature = 293 K
Final temperature = 303 K
Final pressure = ?
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
1.00 atm / 293 K = P₂/303 K
P₂ = 1.00 atm × 303 K / 293 K
P₂ = 303 atm. K /293 K
P₂ = 1.03 atm
What happens when the thermal energy of a substance increases?
The motion of the particles in the substance increases, and the temperature of the substance decreases.
The motion of the particles in the substance decreases, and the temperature of the substance increases.
Both the motion of the particles in the substance and the temperature of the substance decrease.
Both the motion of the particles in the substance and the temperature of the substance increase.
Please answer fast
Answer:
D
Explanation:
D: Both the motion of the particles in the substance and the temperature of the substance increase.
I Hope That This Helps!!!
Both the motion of the particles in the substance and the temperature of the substance increase.
Thermal energy is the energy that is generated and measured by heat.Thermal energy cannot be converted to useful work as easily as the energy of systems that are not in states of thermodynamic equilibrium.As the thermal energy of a substance increases, both the motion of the particles in the substance and the temperature of the substance increase.For more information:
https://brainly.com/question/18989562?referrer=searchResults
It takes of heat to raise the temperature of Object A by , and to raise the temperature of Object B by . Suppose A and B are brought into contact. A is initially hotter. A is seen to cool down by . How would you calculate the rise in temperature of B? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.
Hi, the given question is incomplete, the complete question is:
It takes 4.37 J of heat to raise the temperature of Object A by 1°C, and 2.88 J to raise the temperature of Object B by 1°C. Suppose A and B are brought into contact. A is initially hotter. A is seen to cool down by 6.3°C . How would you calculate the rise in temperature of B?
Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.
Answer:
The correct answer is 9.56 degree C.
Explanation:
Based on the given information, the given object A is initially hotter than object B, and the direct contact between them permits the transfer of heat between them. Based on the law of conservation of energy, the energy cannot be created nor be destroyed. In the given case, the energy, which is lost from object A can only be gained by object B.
Let us consider that both the objects exhibits equal mass, now in order to determine the transfer of energy between them there is a need to multiply the heat capacity with the temperatures. Therefore,
Energy lost by object A = Energy gained by object B
Heat capacity of object A × Temperature lost by object A = Heat capacity of object B × Temperature gained by object B
4.37 J/°C × 6.3 °C = 2.88 J × Tb
Tb = (4.37 J/°C × 6.3° C) / 2.88 J
Tb = 9.56 °C