Answer:
The speed of the car is 75 km per hour
Explanation:
Speed is distance over time so 150 km divided by 2 hours is 75km per hour.
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what is 14.235 rounded to the nearest tenth
Answer:
it would round down to 14.2
Explanation:
the 35 is below 50 so it goes down, and it rounds down to 14.2 instead of, if if was, say, 14.62 then that would round up bc the decimal is higher than 50.
but since it is 235, then it rounds down to 14.2
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Metal X displaces metal Y. Metal Z does not react with X or Y. What is the correct order of decreasing reactivity for metals X, Y, and Z?
Answer:
Metals on top of the activity series can displace metals at the bottom and they are highly reactive as compared to metals at the bottom of the series.
Hence, the order is X>W>Y>Z.
How does a liquid substance change into gas?
Answer: heat
Explanation:
Is that heat boils the liquid and the liquid eventually evaporated into gas
What mass of sulphuric acid can be made from 8g of SO3
(SO3+H2O==>H2S04)
09.8g
18.2g
Answer:
10 g H₂SO₄
General Formulas and Concepts:
Chemistry - Stoichiometry
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
Given: 8 g SO₃
RxN: SO₃ + H₂O → H₂SO₄
Step 2: Identify Conversions
Molar Mass of S - 32.07 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of H - 1.01 g/mol
Molar Mass of SO₃ - 32.07 + 3(16.00) = 80.07 g/mol
Molar mass of H₂SO₄ - 2(1.01) + 32.07 + 4(16.00) = 98.09 g/mol
Step 3: Stoichiometry
[tex]8 \ g \ SO_3(\frac{1 \ mol \ SO_3}{80.07 \ g \ SO_3} )(\frac{1 \ mol \ H_2SO_4}{1 \ mol \ SO_3} )(\frac{98.09 \ g \ H_2SO_4}{1 \ mol \ H_2SO_4} )[/tex] = 9.80042 g H₂SO₄
Step 4: Check
We are given 1 sig fig. Follow sig fig rules and round.
9.80042 g H₂SO₄ ≈ 10 g H₂SO₄
How do limestones that begins as a coral be found on land?
Answer:The limestone began to form millions of years ago, when the land was under the ocean. The rock developed from shells of tiny organisms that float in the ocean. ... However, in the case of reefs, the limestone is produced directly as coral organisms build their skeletons one on top of another.
Difference between bouyancy and density
Answer:
what She said but better
how are fireworks manufactured and produced
Answer:
1. rolled paper tubes filled with black powder (also called gunpowder), are made.
2. Sometimes they are filled with flash paper and a fuse.
3. When the fuse of a firecracker gets lit, the fire burns along the fuse.
4. Then it eventually reaches the powder, and explodes.
Explanation:
A student wants to make a fair comparison of the reactivity of the metals with hydrochloric acid.
Name two variables that must be kept constant.
Answer:
the concentration of the reactants
the temperature in heating
The variable that should be kept constant is the concentration of the reactant and the temperature in heating.
What is hydrochloric acid?Hydrochloric acid (HCl) is called as the muriatic acid represent the colorless corrosive, also the mineral acid should be strong that contains various industrial used also it should be reacted with an organic base it created the hydrochloride salt.
Therefore, we can conclude that The variable that should be kept constant is the concentration of the reactant and the temperature in heating.
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Ernest Rutherford built on the work of previous scientists and improved the accuracy of the atomic model. What part of the atom is Rutherford
credited for discovering?
A.) The protons
B.) The electrons
C.) The nucleus
D.)The electron cloud
1. Glucose, a type of sugar, has the formula
CH, O. What is the total number of atoms
in one molecule of glucose?
Answer:
The answer is 24 in total
Explanation:
This is a 2:1 ratio. The formula of it is C6 H12 O6
the number of neutrons in an atom can be found by subtracting the atomic number from the what?
Answer:
This approximation of mass can be used to easily calculate how many neutrons an element has by simply subtracting the number of protons from the mass number. Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.
Explanation:
Answer:
mass number
Explanation:
1) Protons have what kind of charge?
2) Electrons have what kind of charge?
3) Neutrons have what kind of charge?
1. Hermione is trying to replicate the Polyjuice Potion that they created in their second year at Hogwarts. The problem is that she doesn’t have the exact ingredients that she needsandshe is trying to substitute imitation bat wings instead of real bat wings. She knows that they are not as strong as the original so she is making three batches in the same cauldrons over the same fire so she can test which amount of imitation bat wing will work. The potion will turn green when the correct amount is added.
Test (independent) Variable: ___________________________________
Result (dependent) Variable: _______________________________________________
Constants: ____________________________________________
Answer:
A) Test(independent) variable is bat wings.
B) Result (dependent) Variable is the Polyjuice Potion.
C) Cauldrons and fire
Explanation:
A) A test/independent variable is the variable that is being tested in the experiment or research and it is not affected by other variables in the experiment.
Now, in this experiment, what is being tested is are the bat wings.. Thus;
Test(independent) variable is bat wings.
B) Result (dependent) Variable is a variable that depends on the independent variable being tested. From the question, the result is the Polyjuice Potion.
Thus, Result (dependent) Variable is the Polyjuice Potion.
C) The constants are things that don't change with respect to any of the other variables. In this case, they are; cauldrons and fire
Carbon monoxide (CO) burns readily in oxygen (O2), forming
carbon Dioxide (CO2). Which of the follow equations is shows
this reaction and follows the law of conservation of mass?
Answer:
see attachment......
What is the chemical equation( formula ) of the reaction of photosynthesis
Answer:
The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2.
Explanation:
This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
The chemical reaction for photosynthesis is: 6CO2 + 6H2O in sunlight yields C6H12O6 + 6O2. a. What is the function of sunlight in the reaction. b. What is the function of chlorophyll/ chloroplast?
Answer:
Sunlight provide light energy.
Chlorophyll absorb light.
Explanation:
Sunlight provide light energy or give light energy from sun and it is use to produce glucose from carbondioxide and water which is also a source of energy.
Chlorophyll absorbs light energy and use it to convert carbondioxide and water into glucose and oxygen or it captures sun rays and produce glucose and water.
The reactants in a chemical equation have 3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms. In order to follow the conservation of matter, the products of the chemical equation will have
Answer:
The same amount of atoms (3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms).
Explanation:
According to the law of conservation of mass, when a chemical reaction takes place there is no synthesis or degradation of matter, that is, matter can be neither created nor destroyed. It can only be transformed.
Therefore, in a chemical reaction the atoms are conserved. That means that the elements that in definite proportions are forming a compound, will reorganize to form new compounds, and the amount and type of atoms of the products will be the same as the reactants.
In summary, if the reactants in a chemical equation have 3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms, the products of the chemical equation will have 3 carbon atoms, 6 oxygen atoms, and 4 hydrogen atoms as well.
if you had a chance to get a scholarship abroad?what would you do?
Answer:
I Would bc it's the better opportunity
Which is the ground- state electron configuration for Neon?
Help! The products of a chemical equation are CO2 and 2H20. Which set of atoms
must make up the equation's reactants so that the equation models the law
of conservation of mass?
A. 2 C,3 O, and 4 Hg
B. 2 C,2 O, and 3 H
C. 1 Ca, 4 O, and 4 H
D. 1 C, 4 O and 4 H
Answer:
D. 1 C, 4 O and 4 H
Explanation:
a p e x, just took the quiz
According to law of conservation of mass, the set of atoms that must make up the equation's reactants is 1 C, 4 O and 4 H.
What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.
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The formula for calculating density, D, is D=MV, where M represents mass and V represents volume. For liquids, volume is often given in cubic centimeters (cc), which is the same as cm 3. If the density of an unknown liquid is 1.6 g/cc, what is the mass of 800 cc of the unknown liquid in grams (g)? 0.002 g 1.6 g 500 g 1280 g
please anwser asap!!!!!!!
Answer:
500g
Explanation:
Just divide by all the numbers and the one that equals 1.6 is the answer
I need someones help
Answer:
y or z one of those two i think its z but im so sorry if im wrong if not z then try y also I learned this last year.
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Why does photosynthesis occur? Please explain your answer and do NOT google to find the answer.
Answer:
photosynthesis occurs so the plants can create energy from carbon dioxide and sunlight.
Explanation:
so basiclly it occurs so the plants can create energy to stay alive.
Answer:
Explanation:
photosynthesis occurs basically to help plants get light in order to produce its necessary daily production of nutrients needed for animals to get carbohydrates froms which is eaten by animals since it gives energy. so basically photosynthesis--> energy --> carbs for mammals to eat!
the green colour reflects off the plant so it is not absorbed by the chloroplasts rather all colours are absorbed just not green.
and every organic material on earth is produced by these cells which convert energy from the sun into nutrient filled plants.. its essential for the CO2 cycle , and since they conduct photo synthesis they are lowest level in the food chain so basically its important since they create nutrients for our plants.
The molecule
found in paper is almost identical to the
carbohydrate molecule found in mashed
potatoes.
glycogen
chitin
cellulose
Answer:cellulose
Explanation:
I just did it.
PLEASE HELP!!!!! NEED HELP ASAP!!!!!
Directions: Name the ionic compound created.
EXAMPLE- Sodium and chloride OR NaCl= Sodium chloride
Barium and sulfur =
Magnesium and bromine =
Al2O3 =
KCl =
Answer:
1.BaCO3 2.MgBr2 3.aluminum and oxygen 4.Potassium chloride
Explanation:
Which chemical equation below is balanced to follow the Law of Conservation of Mass?
2 H2 + Cl2 > 3 HCl
2 H2 + 2Cl2 > 2 HCl
H2 + Cl2 > 2HCl
H2 + Cl2 > HCl
Answer:
H₂ + Cl₂ → 2HCl
Explanation:
The equation that is balanced and follows the law of conservation of mass is:
H₂ + Cl₂ → 2HCl
Based on the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed but they combine with one another".
It suggests that the number of species on both sides of the expression must be the same.
For the given reaction:
H₂ + Cl₂ → 2HCl
Reactant side Product side
H 2 2
Cl 2 2
Which is the IUPAC name for NO?
Answer:
Nitrogen (ii) oxide
Explanation:
To know the IUPAC name for NO, we shall determine the oxidation number of N in NO.
NOTE: The oxidation number of oxygen (O) is always – 2.
Thus the oxidation number of N in NO can be obtained as follow:
N + O = 0 (ground state)
N + (– 2) = 0
N – 2 = 0
Collect like terms
N = 0 + 2
N = +2
Thus, the oxidation number of Nitrogen (N) in NO is +2.
Therefore, the IUPAC name for NO is Nitrogen (ii) oxide
Answer:
nitrogen monoxide
Explanation:
for those taking quiz on edge
a. Rub the magnet along the nail or knitting needle. Now try picking up the paper clip or tack. Could your nail pick it up? How many can it pick up at once?
b. Now try to make your magnet stronger by rubbing the magnet along the nail or knitting needle for a longer time. Rub only in one direction, not back and forth. This will increase the number of atoms that line up with the magnet. Try to pick up paper clips or thumbtacks. How many can it pick up now?
Answer:
ight i'll answer both rq
Explanation:
a. Rub the magnet along the nail or knitting needle. Now try picking up the paper clip or
tack. Could your nail pick it up? How many can it pick up at once?
after rubbing the magnet with the nail, it could pick up 7 small paper clips.
b. Now try to make your magnet stronger by rubbing the magnet along the nail or knitting
needle for a longer time. Rub only in one direction, not back and forth. This will increase
the number of atoms that line up with the magnet. Try to pick up paper clips or
thumbtacks. How many can it pick up now?
after rubbing it a second time but for a longer period, it could pick up around 10, almost lifting the 11th.
Answer:
A. After rubbing the magnet with the nail, it could pick up 7 small paper clips.
B. After rubbing it a second time but for a longer period, it could pick up around 10 small paper clips, almost lifting the 11th one.
which description of salt is a chemical property?
No combustion
Odourless
salty taste
solid does not conduct electricity
Answer: No combustion
Explanation:
whats the balanced chemical equation for the standard formation reaction of solid glucose, where everything can only have 1 mole with physical states.
Answer:
6C(s) + 6H2(g) + 3O2(g) --------------------> C6H12O6(s).
Explanation:
One of the examples under the type of sugar; monosaccharide(simple sugar) is the glucose. Glucose(with IUPAC name as D-glucose) as a monosaccharide (simple sugar) has the molar mass of 180.156 g/mol and a Melting point of 146 °C.
Thus, the unbalanced chemical reaction for the formation of glucose is given below;
C(s) + H2(g) + O2(g) --------------------------> C6H12O6(s) ΔH°f = -1273.1KJ/mol.
The balanced chemical reaction for the formation of one mole of glucose is given as;
6C(s) + 6H2(g) + 3O2(g) --------------------> C6H12O6(s).
The balanced chemical equation for the standard formation reaction of solid glucose is: [tex]\mathbf{6C_{(s)} + 6H_{2(g)} +3O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ }[/tex]
Glucose is a simple sugar of a class of carbohydrates known as monosaccharides. It is the principal metabolite for energy production in the human body.
The formation of solid glucose [tex]\mathbf{C_6 H_{12} O_6_{(s)}}[/tex] occurs by the reaction of carbon, hydrogen, and oxygen.
The reaction formation of the solid glucose is:
[tex]\mathbf{C_{(s)} + H_{2(g)} +O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ \Delta H_f^0= -1273.1 \ kJ/mol}[/tex]
Now, the balanced chemical equation can be expressed as follows;
[tex]\mathbf{6C_{(s)} + 6H_{2(g)} +3O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ }[/tex]
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