44.0095 you're welcome hope this helps
Answer:
2.27 moles (To 3s.f.)
Explanation:
The formula to find moles using mass requires you to have the Mr (Relative molecular mass) of the compound. Luckily, this is easily checked from the periodic table.
According to the periodic table, carbon has a relative atomic mass of 12 and oxygen has a relative atomic mass of 16. So, the Mr of CO2 is 12 + 16 + 16 = 44
Accorsing to the formula, moles = Mass/Mr so
Moles = 100/44
= 2.27272727
= 2.27 (To 3s.f.)
what is the total number of protons in carbonate, CO2/3- please help
Answer:
30 positive charged protons
Are bonds ever truly 100 % ionic or 100 % covalent and why?
How many of each subatomic particle are found in Tc-99?
Answer:
43 protons and 99 neutrons.
Explanation:
If 4.03 x 102 mL of water vapor is at STP, then determine the mass, in grams, of the water vapor. Round your
answer to three significant figures.
Answer:
you me me
Explanation:
got me me
3x +14y=5xy
21y - x =2xy
Answer:
456789
Explanation:
What is the oxidation state of S in S032-?
Α. -8
Β. -2
C. +4.
D. +6
Answer:
A
Explanation:
I think that is the ans but am not sure
Pollution is any waste product that damages an ecosystem
True or false?
Answer:
True!
Explanation:
Not only products cause pollution, but the smoke from factories, the gas from our cars. Hope this is helpful! ^^
What is the total number of atoms in the formula
Ca(ClO3)2?
Answer:
9 atoms
Explanation:
Ca=1
Cl=2
O=6
add them all
answer
cl atom is 2
ca atom is 1
o atom is 6
Describe the two ionization reactions that occur in pure water. What do we call the condition that keeps the concentrations of ions at approximately constant levels?
Answer:
1) Pure water can conduct electricity because a small proportion of its molecules dissociate into ions . The two ions formed in water are, hydrogen ions, H +, and hydroxide ions, OH -.
2) dynamic equilibrium
Explanation:
I hope this helps!
Water is said to be a good solvent for polar solutes because it has a negative end and a positive end. This explains why (IONIC/COVALENT) compounds dissolve easily in water. Highlight one
The diagram below represents particles
of different elements in a crystal.
What type of bond holds these
particles together?
A. Covalent
B. Hydrogen
C. Ionic
D. Polar
Answer:
B. Hydrogen
Explanation:
The diagram represents particles of different elements in a crystal. The bond holds these particles together is hydrogen bond. Therefore, option B is correct.
What is hydrogen bond ?An intermolecular force (IMF) known as a hydrogen bond is created when an electronegative atom with a single pair of electrons and a hydrogen atom connected to a strongly electronegative atom are in proximity to another. Between molecules, there are intermolecular forces (IMFs).
When a hydrogen atom that is connected to an electronegative atom moves toward another electronegative atom nearby, powerful intermolecular forces called hydrogen bonds are produced. The hydrogen bond acceptor's electronegativity will rise, resulting in a stronger hydrogen bond.
The interaction known as hydrogen bonding, which involves a hydrogen atom sandwiched between two other atoms with a high affinity for electrons, is stronger than van der Waals forces but weaker than ionic or covalent bonds.
Thus, option B is correct.
To learn more about hydrogen bond, follow the link;
https://brainly.com/question/15099999
#SPJ2
what is the first 30 elements in chemistry
Answer:
Hydrogen (H)
Helium (He)
Lithium (Li)
Beryllium (Be)
Boron (B)
Carbon (C)
Nitrogen (N)
Oxygen (O)
Explanation:
that's the main ones I know
Answer:
H,He,Li,Be,B,C,N,O,F,Ne,Na,Mg,Al,Si,P,S,Cl,Ar,K,Ca,Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn...
Explanation:
H stands for hydrogen
He stands for helium
Li stands for lithium
Be stands for beryllium
B stands for boron
C stands for carbon
N stands for nitrogen
O stands for oxygen
F stands for fluorine
Ne stands for neon
Na stands for sodium
Mg stands for magnesium
Al stands for aluminum
Si stands for silicon
P stands for phosphorus
S stands for sulfur
Cl stands for chlorine
Ar stands for argon
K stands for potassium
Ca stands for calcium
Sc stands for scandium
Ti stands for titanium
V stands for vanadium
Cr stands for chromium
Mn stands for manganese
Fe stands for iron
Co stands for cobalt
Ni stands for nickel
Cu stands for copper &
Zn stands for zinc
HOPE THIS ANSWER WILL HELP YOU!!!
2.00 liters of gas at 1.00 atm and conpresssed it to a pressure of 6.00 atm, what would the volume of the gas be
Answer:
[tex]V_2=0.5L[/tex]
Explanation:
From the question we are told that:
initial Volume [tex]V_1=2.00L[/tex]
initial Pressure [tex]P_1=1 atm[/tex]
Final Pressure [tex]P_2=6atm[/tex]
Generally the equation for Final Volume V_2 is mathematically given by
Since Boyle's law states
[tex]P_1V_1=P_2V_2[/tex]
[tex]V_2=\frac{P_1V_1}{P_2}[/tex]
[tex]V_2=\frac{2*1}{6}[/tex]
[tex]V_2=0.5L[/tex]
Determine if each of the following will form a neutral, acidic, or basic solution and explain why. Show your work.
a) NaHSO4
b) Na2SO4
c) NH4CN
Answer:
For a: The given salt is acidic in nature.
For b: The given salt is neutral in nature.
For c: The given salt is neutral in nature.
Explanation:
Salts are formed by the combination of an acid and a base. There are 3 types of salt:
Acidic salt: It is formed by the combination of strong acid and weak base.Basic salt: It is formed by the combination of a strong base and weak acid.Neutral salt: It is formed by the combination of strong acid and strong base or weak acid and weak base.For the given options:
(a): [tex]NaHSO_4[/tex]
This salt is formed by the combination of sodium hydroxide (strong base) and the partial dissociation of sulfuric acid (strong acid). It also has a replaceable hydrogen ion which can be produced when dissolved in water. Thus, the given salt is acidic in nature.
(b): [tex]Na_2SO_4[/tex]
This salt is formed by the combination of sodium hydroxide (strong base) and sulfuric acid (strong acid).
Thus, the given salt is neutral in nature.
(c): [tex]NH_4CN[/tex]
This salt is formed by the combination of ammonium hydroxide (weak base) and hydrocyanic acid (weak acid).
Thus, the given salt is neutral in nature.
(PLEASE ANSWER!!!!) Why is it necessary to add an indicator to the flask during an acid-base titration?
Answer: An indicator is itself a weak acid or weak base but a special one. The colour of the acid form is different from the colour of the base form. So you can tell when the pH of your solution has changed from being one to the other by seeing the colour change from one to the other. The particular pH where that colour change occurs depends on the particular indicator you use. The most common indicator in UG Chem Labs is probably the one called Phenolphthalein when it has its proton attached, it is colourless like water but when the proton comes off it is pink. This change happens around pH=8–9. any solution with pH below that (acidic) will make the phenolphthalein hold onto its proton and be colourless. Any pH above that will cause it to lose its proton and become pink.
Explanation:
How different foods affect glucose levels in the body virtual lab.
Carry out the procedures outlined in the virtual lab. In your own words, summarize the steps you used to complete the virtual assignment. Explain what the test (independent) variable was, and what the outcome (dependent) variable was.
What is independent variable and dependent variable? In your own words.
Answer: this might have something to do with the pancreas
Explanation:
the pancreas produces insulin if subject a produces more insulin than subject b the reaction to the glucose will be different the pancreas breaks down the glucose into sugar and protiens hope this helps
The temperature of a 95.4 g piece of copper decreases from 48°C to 25°C when the copper releases - 849 J of heat. What is the specific heat of copper?
Can anyone please suggest me a good and easy project topic for physics and chemistry. For class nine or ten students.Please please please help me.
why do tectonic plates move to form volcano
When the tectonic plates try to walk to burger king, they always bump into each other because of how close together they are. Once in a while, a tectonic plate will get so pis sed of, it will form a volcano to let out its anger.
Solve the given problems showing all work for each. 1. Calculate the molar mass/formula mass of ammonium sulfate -- (NH4)2SO4 , The atomic mass of Nitrogen (N) = 14.0, Sulfur (S) = 32.1, Hydrogen (H) = 1.0, & Oxygen (O) = 16.0 *
Answer:
The molar mass of ammonium sulfate, (NH₄)₂SO₄ = 132.1 g
Explanation:
The molar mass of a compound is the mass of 1 mole of the given substance.
For a compound the molar mass of the compound is obtained by summing the product of the number of atoms and the atomic masses of the atoms present in the compound.
To calculate the molar mass of ammonium sulfate, (NH₄)₂SO₄:
Atomic masses of the elements are as follows; Nitrogen (N) = 14.0, Sulfur (S) = 32.1, Hydrogen (H) = 1.0, & Oxygen (O) = 16.0
Mass of Nitrogen present = 14.0 × 2 = 28.0 g
Mass of hydrogen present = 1.0 × 4 × 2 = 8.0 g
Mass of sulfur present = 32.1 × 1 = 32.1 g
Mass of oxygen present = 16.0 × 4 = 64.0 g
Molar mass of ammonium sulfate, (NH₄)₂SO₄ = (28.0 + 8.0 + 32.1 + 64.0) g = 132.1 g
Therefore, the molar mass of ammonium sulfate, (NH₄)₂SO₄ = 132.1 g
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(1)
How many moles of iron can be made from 3 moles of Fe2O3?
ANSWER - 6 MOLES OF IRON
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(1)
One moles of Fe2O3 forming 2 moles of Fe
3 moles of Fe2O3 will form 2×3 = 6 moles of iron
An experiment requires a solution of 60 % ethanol by volume. What volume of alcohol should be added to make a 200 mL of this solution?
Answer: 120 mL of ethanol must be added.
Explanation:
We are given:
60% ethanol by volume
This means that 60 mL of ethanol is present in 100 mL of solution
Given volume of solution = 200 mL
Applying unitary method:
If 100 mL of solution contains 60 mL of ethanol
So, 200 mL of solution will contain = [tex]\frac{60}{100}\times 200=120mL[/tex] of ethanol
Hence, 120 mL of ethanol must be added.
Which substances are the products in the equation below?
Answer:
CO2 AND H2O are the products of the following reaction
Where to connect the lines? Pls answer
Answer: The given factors are matched to the effect it would have on the reaction rate are as follows.
Increase reaction rate- Crushing the antacid tablet
- Using many antacid tables
- Adding a catalyst to the water
Decrease reaction rate- Cooling the water during the reaction
No effect on reaction rate- Adding food coloring to the water
Explanation:
When antacid tablet is crushed then there will be more number of particles available for reaction. Hence, more number of collisions will take place due to which rate of reaction increases.
Using many antacid tables will also increase the number of molecules due to which there will be more collisions. Hence, more will be it's rate of reaction.
A catalyst is defined as a substance which helps in increasing the rate of a reaction without itself getting consumed in the reaction.
Therefore, adding catalyst to the water will also increase the rate of reaction.
When water is cooled during the reaction then kinetic energy between molecules decreases due to which there will be less number of collisions. Hence, rate of reaction will decrease.
Adding food coloring will have no effect on the rate of reaction as it is only changing the color of solution and does not participate in the chemical reaction.
Thus, we can conclude that given factors are matched to the effect it would have on the reaction rate are as follows.
Increase reaction rate- Crushing the antacid tablet
- Using many antacid tables
- Adding a catalyst to the water
Decrease reaction rate- Cooling the water during the reaction
No effect on reaction rate- Adding food coloring to the water
why couple should use a method of birth control
Answer:
because it will control the birth of a child which can happen alot being overpopulated in the country or world. It also can mange their life and create a small and happy and healthy family.Also the child can get more love and support from their parents if they have less children and it wont be a taruma for the couple as well. because growing a child can be expensive time costly and really hard.
Explanation:
plz mark me as a brainlest a and thanks my answer
A car reaches 80 km/hr, then suddenly crashed into a concrete wall. Without a seat
belt, the crash test dummy slams into the car's dashboard because
A the crash test dummy's kinetic energy drops to zero
B the dashboard is pushed backwards into the crash test dummy
C the crash test dummy continues its motion until acted upon by an unbalanced
force
D Gravity is pulling the crash test dummy in the direction the car is moving
Answer:
C
Explanation:
inertia
inertia is the reluctance of an object at rest or moving to change its state of rest or motion
because the car was moving, the dummy moves with the speed of the car..so when the crash happened the dummy continued to move..it was feeling reluctant to come to rest so was moving
Inside a car that was at STP, a 1.33 L bottle warms up to 130 C. If the volume of the bottle remains constant, what is the pressure, in atm, inside the hot water bottle?
Answer:
[tex]P_2=1.48atm[/tex]
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to infer this problem is about the application of the Gay-Lussac's gas law to relate the initial and final pressure and temperature as shown below:
[tex]\frac{P_2}{T_2} =\frac{P_1}{T_1\\ }[/tex]
Thus, solving for the final pressure, P2, and using the temperatures in Kelvins, we obtain:
[tex]P_2 =\frac{P_1T_2}{T_1 }\\\\P_2 =\frac{1atm*403.15K}{273.15K}\\\\P_2=1.48atm[/tex]
Regards!
HELP WITH FINAL CHEM
Answer:
idvd has a very high performance and a lot more than just the right side to get it all out
B. Hot water
The specific heat capacity of water is 4.186J/g °C
Calculate the temperature change when 8000 j of heat is added to 3g of water.
Use the equation q=mcAT
C. Specific heat capacity
Water has a specific heat capacity of 4.186J/g °C
Concrete has a specific heat capacity of 0.880 J/g °C
If a kg of water and a kg of concrete sit out in the sun on a hot day which one will have a change of temperature faster?
Explain why?
Answer:
The heat capacity measures the amount of heat necessary to raise the temperature of an object or system by one degree Celsius.
LEARNING OBJECTIVES
Explain the enthalpy in a system with constant volume and pressure
KEY TAKEAWAYS
Key Points
Heat capacity is the measurable physical quantity that characterizes the amount of heat required to change a substance’s temperature by a given amount. It is measured in joules per Kelvin and given by.
The heat capacity is an extensive property, scaling with the size of the system.
The heat capacity of most systems is not constant (though it can often be treated as such). It depends on the temperature, pressure, and volume of the system under consideration.
Key Terms
List some of the effects of the increased production of
greenhouse gases on the Earth
Answer:
See Explanation
Explanation:
Green house gases are those gases believed to be responsible for the trapping of infrared ray close to the surface of the earth. The effect of the buildup of such gases include;
1) Rise in global temperature; Greenhouse gases trap infrared rays close to the surface of the earth there by leading to a continuous rise in the temperature of the earth. This is known as global warming.
2)Climate Change; Increase in the concentration of greenhouse gases in the atmosphere leads to different patterns of climatic events. This gradual change in the pattern of climatic events is called climate change.
3)Melting of polar ice caps and flooding; Increase in the concentration of greenhouse gases and consequent increase in the earth's temperature leads to the melting of polar ice caps and subsequently flooding in various parts of the world.