The answer is A. factory worker
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.
Explain what a valence electron is. Using the atomic structure above (#4) give the number of valence electrons.
Answer:
valence electrons are the electrons in the outermost shell and there are 6 valence electrons in sulfur
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.
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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:
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
............................................................
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.
1. The force that pulls the atmosphere toward Earth
Answer:
Gravity :)
Explanation:
Calculate the molar concentration of the acid if "50.6 mL" of hydrochloric acid was required to neutralize 45.0 mL of 0.345 M "calcium hydroxide".
The molar concentration of the acid, HCl required for the reaction is 0.614 M
We'll begin by writing the balanced equation for the reaction. This is given below:
2HCl + Ca(OH)₂ —> CaCl₂ + 2H₂O
The mole ratio of the acid, HCl (nA) = 2
The mole ratio of the base, Ca(OH)₂ (nB) = 1
From the question given above, the following data were obtained:Volume of acid, HCl (Va) = 50.6 mL
Volume of base, Ca(OH)₂ (Vb) = 45 mL
Molarity of base, Ca(OH)₂ (Mb) = 0.345 M
Molarity of acid, HCl (Ma) =?MaVa / MbVb = nA/nB
(Ma × 50.6) / (0.345 × 45) = 2
(Ma × 50.6) / 15.525 = 2
Cross multiply
Ma × 50.6 = 15.525 × 2
Ma × 50.6 = 31.05
Divide both side by 50.6
Ma = 31.05 / 50.6
Ma = 0.614 MTherefore, the molar concentration of the acid, HCl is 0.614 M
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The molar concentration of the acid is 0.614 mol/L
The balanced chemical reaction for the reaction is
Ca(OH)₂ + 2HCl → CaCl₂ + H₂O
Using CV/C'V' = n/n' where C = molar concentration of hydrochloric acid, V = volume of hydrochloric acid = 50.6 mL = 0.0506 L, n = number of moles of hydrochloric acid = 2, C' = molar concentration of calcium hydroxide = 0.345 M = 0.345 mol/L, V' = volume of calcium hydroxide = 45.0 mL = 0.045 L, n' = number of moles of calcium hydroxide = 1.
Making C subject of the formula, we have
C = nC'V'/n'V
Substituting the values of the variables into the equation, we have
C = nC'V'/n'V
C = 2 × 0.345 mol/L × 0.045 L/(1 × 0.0506 L)
C = 2 × 0.345 mol/L × 0.045 L/0.0506 L
C = 0.03105 mol/0.0506 L
C = 0.614 mol/L
So, the molar concentration of the acid is 0.614 mol/L
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ASAP HELP FOR BRAINLIST
The mass of a bowling ball is 3629 g and volume is 5280 ml. Find the density of the bowling ball and determine if it will sink or float in water?
Question 16 options:
Density of the bowling ball is 1.7 x 107, so it will sink in water as its density is greater than the density of water.
Density of the bowling ball is 1.7 x 107, so it will float in water as its density is lower than the density of water.
Density of the bowling ball is 0.688 g/ml, so it will float in water as its density is lower than the density of water.
Density of the bowling ball is 0.688 g/ml, so it will sink in water as its density is greater than the density of water.
Answer:
Option 3
Hope this helps!
b) What type of bond is formed between the atoms of this type of compound?
Answer: Covalent bond involves a pair of electrons being shared between atoms.
Explanation:
80 protons, 119 neutron
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.
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
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.
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ILL GIVE YOU BRAINLIEST AND A 100 POINTS PLEASE HELP ... Dont answer if you dont know
Observe the substances in the test tubes for 15 minutes. In the table, describe what’s happening in each test tube, including any evidence of a chemical reaction.
Remember that evidence of chemical reactions can include change in color, change in smell, change in temperature, formation of a solid, or formation of bubbles. If there’s no observable change in a test tube, write “no reaction.”
pretty sure no reaction if it is wrong id like to give you back your points i can make up a question for u
WILL GET BRAINLIEST!!!! Please Help
describe the sharing of electrons in polar covalent bonds and nonpolar covalent bonds
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:
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
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
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:
what is the source of energy that provides the boost for electrons during photosynthesis
Answer:
The sun
Explanation:
The sun is the source of energy that provides the boost for electrons during photosynthesis
How did the Coronaviridae family get its name?
I DON'T UNDERSTAND! PLEASE HELP.
Answer:
A would be the lowest, then C, and B would be the highest.
Explanation:
Elements tend to become more reactive as you move down the periodic table. This happens because the atoms become progressively larger and lose their hold on the outer eletrons more easily.
What is the wavelength of light in nm with energy of 4.41 x 10^-17 kj?
Answer: 21
Explanation:
H2(g) + I2(g) → 2HI(g)
A student makes the following statements:
Hydrogen always has the same oxidation number, so it has an oxidation number of +1 in both the reactant H2 and product HI.
Iodine is in Group VIIA, so it has an oxidation number of –1 in both the reactant I2 and product HI.
Neither hydrogen nor iodine changes oxidation states, so the reaction is not a redox reaction.
In three to five sentences, describe the mistake that the student made, and determine whether or not the reaction is a redox reaction. Explain your answer.
This problem is providing statements whereby an student is pretending to explain a wrongly-classified non-redox reaction via the change in the oxidation numbers the elements undergo as it takes place. It is asked to report where the student went wrong and to determine whether the reaction is redox or not.
In such a way, we can start by saying that the student was right about the +1 on H and -1 on I but just on HI, not on the diatomic gases too, because when the elements act alone in a chemical equation, their oxidation states must be 0 as they are not forming any ions.
Next, we can go over the identification of the reaction as redox, by writing the correct oxidation numbers in the considered chemical equation:
[tex]I_2^0(g)+H_2^0(g)\rightleftharpoons 2H^+I^-(g)[/tex]
Which exhibits an oxidation half-reaction for hydrogen because it changed from 0 to +1 and a reduction half-reaction for iodine because it changed from 0 to -1, and thus, when the oxidation numbers change, we say the reaction is redox.
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(Balancing redox) https://brainly.com/question/8344408What 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 :)
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
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.
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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:
the products of the acid catalyzed hydrolysis of a fat are
The acid catalysed hydrolysis of fats yields fatty acids and glycerol which are the constituents of the fatty acid.
Fats are composed of triglycerides. Trigycerides are formed from fatty acids and propane - 1,2,3 - triol. Triglycerides are essential components of the human body.
Hydrolysis involves the breaking up of a substance into its constituents owing to the addition of water, acid or base. The acid catalysed hydrolysis of fats yields fatty acids and glycerol which are the constituents of the fatty acid.
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