Balancing Chemical Equation
H2+N2=NH3
Answer:
H2 + 3N2 ⇒ 2NH3
Explanation:
Remember when balancing chemical equations you are trying to make sure that each side of the equation has a equal number of atoms, and when one sides number of atoms is odd you need to multiply to get a even number.
H2 + N2 = NH3
N = 1 × 2 = 2
H = 3 × 2 = 6
N = 2 × 1 = 2
H = 3 × 2 = 6
H2 + 3N2 ⇒ 2NH3
Hope this helps.
What is used to measure the amount of matter in a solid, liquid, or gas?
A. Celsius and Fahrenheit
B. Grams and kilograms
C. Kilometers and miles
D. Miles and meters
Answer:
B
Explanation:
Grams and kilograms :)
What do you think the ideal pH of a swimming pool should be? Explain.
Answer:
Explanation:
The pH scale goes from 0 to 14, where pH 7 is neutral. If the pH is above 7, the water is basic; if it is below 7 the water is acid. The optimum pH for pool water is 7.4, since this is the same as the pH in human eyes and mucous membranes. A pH of 7.4 also gives good chlorine disinfection.
HELP ME PLEASE!
What information in a balanced chemical equation shows how many moles of a reactant are involved in the reaction?
A. The superscripts in a formula tell the number of moles of the molecule.
B. The oxidation states of atoms in a molecule tell the number of moles.
C. The coefficient in front of the molecule tells its relative number of moles.
D. The subscript in a formula tells the number of moles of that molecule.
The information in a balanced chemical equation shows how many moles of a reactant are involved in the reaction is,
The coefficient in front of the molecule tells its relative number of moles.So, option C is correct one.
What is chemical equation?The symbolic representation of chemical reaction is called chemical equation.There are three parts of in chemical equation,first reactant from where reaction is started, second product the final result and arrows between reactant and product which shows conversion.The reactant part given in left hand side and product part is given in right hand side in chemical equation.What is balanced chemical equation?The chemical equation in which number of each type of atom is equal in both side of the arrow is called balanced chemical equation.
To learn more about chemical equation here.
https://brainly.com/question/12047033
#SPJ2
Many communities rely on solar energy for daily life uses.
Suppose the Moon was twice its size and cast a bigger shadow on Earth
during a solar eclipse, causing the light from the Sun to be blocked for
days. How would this affect the communities who rely on solar energy?
Answer:
This would affect the communities that use solar energy greatly, in a negative way.
Explanation:
If the moon were twice its size, and cast a larger shadow on Earth, the shadow would black out the earth to an almost night time, during the day. We would have a 24+ hour night, and communities relying on nothing but solar energy would be out of power until the sun was out again.
Please help!!
Soren is making a poster about John Dalton’s understanding of the atom. He wants to emphasize that Dalton’s atomic theory was not completely accurate. Which of these statements should Soren include on his poster to explain what was missing from Dalton’s atomic theory?
A. Atoms are made up of smaller particles.
B. All atoms of the same element are identical.
C. Atoms of different elements have different masses.
D. Compounds form when atoms of different elements combine in a specific ratio.
Answer:C
Explanation:
Choose the answer that best describes the order of the life cycle of a large star.
Answer:
The one you currently picked. The last one i think
Explanation:
How does the DNA of a daughter cell compare to the DNA of the parent cell in asexual reproduction?
A . The daughter cell DNA is identical to the DNA from the parent cell.
B .The daughter cell DNA has a mixture of traits from the DNA of two parent cells.
C . The daughter cell DNA has only half the traits found in the parent cell’s DNA.
D . The daughter cell DNA has a completely new set of traits as compared to the parent cell’s DNA.
Answer:
The Answer is B
Explanation:
I hope this helps ;)
The process by which the organisms give rise to offspring is defined as the reproduction. It is mainly of two types, they are sexual and asexual. The daughter cell DNA is identical to the DNA from the parent cell in asexual reproduction. The correct option is A.
What is asexual reproduction?The mode of reproduction in which a new offspring is produced by a single parent is defined as the asexual reproduction. The newly formed individuals are genetically and physically identical to each other. They are called the clones of their parents.
Asexual reproduction occurs in both unicellular and multicellular organisms. This process does not involve any kind of gamete fusion and there is no change in the number of chromosomes either. It will obviously inherit the same genes as the parent.
In asexual reproduction, single parent is involved, the offspring is genetically similar, and this process occurs in a very short time.
Thus the correct option is A.
To know more about asexual reproduction, visit;
https://brainly.com/question/29764208
#SPJ6
How many moles are 18.06*10^23 formula units of salt?
Answer:
mole
Originally, a mole was the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. That number of particles is Avogadro's Number, which is roughly 6.02x1023. A mole of carbon atoms is 6.02x1023 carbon atoms.
Explanation:
From what you know about helium and the elements in its group, which statement best explains why helium is placed where it is, instead of the second column
Answer:
Helium is a noble gas and shares many properties with the other noble gases in the last column.
Explanation:
got it right
also it is classified as a noble gas, and hydrogen is a nonmetal so obviously they don't fit together, as the group is for alkali metals which Helium obviously isn't.
1. The force that pulls the atmosphere toward Earth
Answer:
Gravity :)
Explanation:
I will give brainliest!!
Match these items.
1. changing from liquid to gas state
2. the combining substances in a reaction
3. radiation
4. slow oxidation
5. melting point of water
6. a reaction between a substance and oxygen
7. pertaining to the nucleus of an atom
8. to fuse or join together
9. rapid oxidation
10. heat
fusion
burning
evaporation
rusting
0 degrees C
gamma rays
thermo-
reactants
nuclear
oxidation
Answer:
1. changing from liquid to gas state
Evaporation
2. the combining substances in a reaction
Reactants
3. radiation
Gamma Rays
4. slow oxidation
Rust
5. melting point of water
0˚ C (0 degrees Celsius)
6. a reaction between a substance and oxygen
Oxidation
7. pertaining to the nucleus of an atom
Nuclear
8. to fuse or join together
Fusion
9. rapid oxidation
Burning
10. heat
Thermo-
The change in liquid to gas state is called evaporation. Evaporating a liquid will energize the molecules and converts them to the gaseous state.
What is change in state?A change in state or phase of a substance is called a physical change where, one state changes to the other like liquid vaporize to form gases.
Thus, first option is matching with 4th one evaporation.
The combining substances in a reaction is called reactants.
One example of radiation given here is gamma rays.
An example of slow oxidation is rusting that is the formation of red iron oxide on corroding metals.
Melting point of water is 0 ⁰C.
A reaction between a substance and oxygen is called oxidation.
A common term pertaining to the nucleus and of an atom is nuclear.
The process of fusing or joining of two species together is called fusion.
Thermal process are involving rapid oxidation.
Heat is a form of energy where overheating anything causes burning.
To find more about physical changes, refer the link below:
https://brainly.com/question/21509240
#SPJ5
Acids and bases release what kind of ions in water?
Answer:
"Acids produce hydrogen ions, H+, in water. Bases produce hydroxide ions, OH-."
Explanation:
Answer:
Explanation:
Acids and bases release what kind of ions in water?
Acids release hydrogen ions, bases release hydroxide ions.
the cation H+ of acids consisting of a hydrogen atom whose electron has been transferred to the anion of the acid'
the monovalent anion OH− consisting of one atom of hydrogen and one of oxygen
— called also hydroxide ion
reaction happens when chemical bonds give off heat.
Answer:
Explanation:
Chemical reactions that release energy are called exothermic. In exothermic reactions, more energy is released when the bonds are formed in the products than is used to break the bonds in the reactants. Exothermic reactions are accompanied by an increase in temperature of the reaction mixture.
Which of the following can be highly compressed?
a an iron bar
b milk
C liquid water
d nitrogen gas
Explanation:
d. nitrogen gas because of weak intermolecular force
What do animal and plant cells have in common
A.both have central vacuoles
B.both have chloroplasts
C.both have cell membranes
D.both have cell walls
Answer:
both have cell membranes
Explanation:
the animal cell has small or temporary vacuoles.
animal cell does not have chloroplast or cell wall.
Rain snow sleet and hail are forms of condensed water vapor in the earth this is known as
A.transportation
B.precipitation
C.evaporation
refer to the example pic for ur reference !!
If you were to compare the function of a cell to the function of a city , which of the following organelles would be the city’s power plant
Answer:
Mitochondria
Explanation:
The mitochondria is the powerhouse of the cell
What is the wavelength of light in nm with energy of 4.41 x 10^-17 kj?
Answer: 21
Explanation:
Ollie has a mass of 45 kilograms. What is his weight in newtons?
Answer:
646.8
Weight in Newtons can be found by multiplying the mass times the acceleration of gravity.
The mass of the man is 66 kilograms on Earth.
Earth has an acceleration of gravity that is 9.8 meters per square second.
Substitute the values into the formula.
Multiply.
1 kg * m/s² is equal to 1 Newton, therefore our answer of 646.8 kg *m/s² is also equal to 646.8 Newtons, or N.
The man's weight in Newtons in 646.8 Newtons
............................................................
When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2Al(s)+6HCl(aq)⟶2AlCl3(aq)+3H2(g) What volume of H2(g) is produced when 7.40 g Al(s) reacts at STP?
Answer:
9.18 L
Explanation:
When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2Al(s)+6HCl(aq)⟶2AlCl3(aq)+3H2(g) What volume of H2(g) is produced when 7.40 g Al(s) reacts at STP?
first write, then balance the equation
Al + HCl-------------> AlCl3 + H2
2Al + 6HCl-----------> 2AlCl3 + 3H2 2 MOLE
2 moles of Al produce 3 moles of H2
Al is 7.4/27 =
0.27 moles of Al.
this will produce
0.27 X 3/2 moles of H2 =
0.41 moles of H2
PV =nRT
for STP, P = 1 atm, T = 273.2, R IS 0.082
V= (0.41) X 0.082 X 273,2/1 = 9.18 L
CHECK 1 mole of gas at STP has a volume of 22.4 L
0.41 moles then has a volume of 00.41 X 22.4L = 9.,18 L
FREE BRAINIEST WHO WANTS IT?!!!
Answer:
me
Explanation:
me
How is the potential (voltage) of a redox reaction determined using the reduction
potential chart? Calculate the voltage for the equation CuCl2+Zn—->ZnCl2+Cu
The voltage for the equation CuCl₂ + Zn —> ZnCl₂ + Cu is -1.1 Vol.
The response is CuCl₂ + Zn —> ZnCl₂ + Cu, which means that it's miles a dry mobile battery, in which the anode, zinc reacts with chloride this is the cathode. within the dry battery cellular, the chemical power is stored in it, which converts into electrical power.
calculation:-
using an electrochemical chart;
⇒Reduction potential of Zn²⁺ = -0.76
⇒Reduction potential of Cu²⁺ = 0.34
Eo ( voltafe) = Ecathod - Eanode
= -0.76 - 0.34
= -1.1 Volt
Measured redox potentials depend upon the capacity power of valence electrons, the concentrations of the species inside the reaction, and the temperature of the device. the reduction capacity for the opposite of the oxidation 1/2-response and opposite the signal to obtain the oxidation capability. For the oxidation half-response, Eooxidation = - Eoreduction. upload the potentials of the half-cells to get the overall trendy cellular capacity.
Reduction potential (Eo) is defined as a bent of a chemical species to be reduced by way of gaining an electron and is defined with the electrochemical reference of hydrogen.
Learn more about redox reactions here:-https://brainly.com/question/21851295
#SPJ1
The term ____________ refers to anything that occupies space and has mass.
Answer:
The term matter refers to anything that occupies space and has mass.
Explanation:
Answer:matter
Explanation:
You have a glass of liquid and combine it with a mysterious solid and notice that over time the color changes. this questions has two answers
1) give me a scenario that would explain how this coukd be a physical change
2) give me a scenario that would explain how this could be a chemical change
Answer:
This is a verified chemical change. On the other hand, if you add red ink to water, it will turn red. However, we would classify that as a physical change. To conclude, color change is a great indicator that change has occurred.
Explanation:
This is since there are examples of color change being an indicator for both of them. For instance, when you heat the blue copper(II) hydroxide solution, you'll eventually end up with a black copper oxide ( Cu O ) solution. This is a verified chemical change. On the other hand, if you add red ink to water, it will turn red. However, we would classify that as a physical change.
To conclude, color change is a great indicator that change has occurred. However, it does not tell you which type of change might have occurred. You will want to use better indicators - like release of heat - to guide you with that.
Hope that helped :)
An ion with 5 protons, 6 neutrons, and a charge of +3 has an atomic number of
O 8
O 6
O 5
O 3
an inert gas that has a bigger atomic radius than element E(in number 2)
Explanation:
This is due to the reason that in case of inert gases, the outer shell is complete and it has hence maximum electronic repulsion. Moreover in case of inert gases, the atomic size is expressed in terms of Vanderwaal’s radius because, noble gases do not form covalent bonds while other form covalent bonds and hence their atomic radii is expressed in covalent radius. Generally atomic size decreases while moving from left to right in the periodic table. But in the case of noble gases, they have comparatively higher atomic size than corresponding halogens because of the reason that vanderwaal’s radii (present in noble gases) is much larger than ionic and covalent radii (present in other elements). Thus as, Vanderwaal’s radius is greater than covalent radius, the atomic size of noble gases is larger than other elements of same period.
Amoebiasis is a disease that occurs due to an infection caused by the parasite Entamoeba histolytica. The parasite reproduces rapidly and invades the large intestine.
How does amoebiasis interfere with the normal functioning of the body?
1) It causes the ear to ache.
2) It disrupts the normal intake of air.
3) It causes the skin to itch.
4) It disrupts the normal excretion of solid wastes.
Answer:
4) It disrupts the normal excretion of solid wastes.
Answer:
4
Explanation: Took the test
PLEASSEE HELLP!!
_Which of the following considered as isoelectronic particles? _
(a)7 N-3 ,8 O-2 , 9F-1
(b) 8 O-2 ,9 F-1, 16 s-2
(C) 18 Ar , 20 Ca+2, 11 Na+
(d) 18 Ar , 12 Mg+2, 16 s-2
Answer:
its a
Explanation:
80 protons, 119 neutron
