Answer:
About 0.783
Explanation:
Answer:
0.7830 mol
Explanation:
Just divide by the molar mass, which is 16.04 g/mol. That will take away grams so youre left with moles and your answer will be .783042. Using significant figures (4) so it will be 0.7830.
WHAT IS THE CHEMICAL REACTION
Answer:
hi
Explanation:
Chemical reactions are an integral part of technology, of culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.
-facts
science question. Can you also tell me what weight has to do with the acceleration?
The following equation represents the combustion of
propane in excess oxygen.
C³h⁸ + 5O²----> 3CO² + 4H²O
What is the volume of carbon dioxide gas produced
when 48 cm of propane is completely burnt
a.28 cm³
b.48 cm³
c.96 cm³
d.144cm³
Answer:
i don't know the answer now please sorry for the day before the end of the following is Open you have a good time with the button in the top right of
Answer:
3*0.35L = 1.05L
Explanation:
For part A, we need the ratio of moles of propane to moles of oxygen to get the volume of oxygen required.
The equation tells us there are 5 moles of oxygen gas required to combust 1 mole of propane.
So the required volume of oxygen is 5*0.35L = 1.75L
The equation also tells us that 3 moles of carbon dioxide are produced from the combustion of one mole of propane.
Therefore the produced volume of carbon dioxide is 3*0.35L = 1.05L
In which numbered position would a Period 4 element that is a metal with three valence electrons be located?
Did u get the answer im taking the test rn
intrusive igneous rock forms when the cooling of magma takes place fast on the top of the Earth's surface. A. True B. False
Answer:
A
Explanation:
True igneous rock forms cooling of magma fast on the top
Answer:
The answer is A. True
Explanation:
Ben has a snack with a combination of raisins, chocolate pieces, and nuts. As he eats the snack, Ben picks out all of the raisins.Which BESTdescribes the snack Ben is eating
Answer:
Trail Mix
Explanation:
The best description for the snack that Ben is eating would be Trail Mix. This is a very common snack for hikers, hence the name, since it is very healthy and great for taking on hikes since it does not get affected by the sun. This snack was originally called GORP which stands for "good old raisins and peanuts" because the snack originally contained only raisins and peanuts. It has since changed to include various different ingredients such as a variety of nuts, chocolate pieces, dried fruit, cereal etc.
someone who is good at chemistry please help me
Write a word equation and a formula equation for each chemical reactions
A) Solid calcium reacts with chlorine gas to produce solid calcium chloride.
B) Nitrogen gas reacts with solid Iodine to produce nitrogen triiodide gas.
what are salt properties of matter?
Answer: Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.
Answer:
Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.
Explanation:
give the first answer brainliest, im just fixing thier spelling
What is the ratio of oxygen to carbon dioxide? 2 C2H6+7 O2=6 H2O+4CO2
Answer:
7:4
Explanation:
The coefficients of a balanced chemical equation give us the mole ratios. The coefficient of carbon dioxide here is 4 and oygen is 7.
Need help with this ASAP
Thanks!
Answer:
Decomposers (either Secondary Consumer or Tertiary Consumer)
Explanation:
Decomposers eat dead materials and break them down into chemical parts. ... They keep the ecosystem free of the bodies of dead animals or carrion. They break down the organic material and recycle it into the ecosystem as nutrients. Vultures, Blowflies, hyenas, crabs, lobsters and eels are examples of scavengers.
Pls, Answer ASAP!!!! I have to turn in my HW in 20 mins!!
In the rocket fuel formulation for NASA, 325 grams of solid aluminum (Al) particles are heated with 211 grams of solid iron III oxide (Fe2O3). Show all work and units. Include significant figures in your final answer.
a) Write the balanced equation
b) Calculate the mass of iron produced from the reaction
c) Identify the limiting reagent
d) Determine the amount of excess reactant leftover
Show all work and units. Include significant figures in your final answer.
Answer:
B. Calculate the mass of iron produced from the reaction
Explanation:
Sana makatulong mark me as a brainliest
What is electroluminescence? Give one example.
Answer:
electroluminescence is a production of light by the flow of electrons, as within certain crystals. An example is at most resataurants with a bright sign that either says open or closed.
Explanation:
Which element is the first element in group 13 of the periodic table of elements?
Answer:
Boron
Explanation:
Answer:
Boron
Explanation:
Boron is the first element of Group 13 and is the only metalloid of the group. Its chemical symbol is B, and it has an atomic number of 5. Boron has the electron configuration [He] 2s 2 2p 1 and prefers an oxidation state of +3. Boron has no natural elemental form; it forms compounds which are abundant in the Earth's crust.
How many moles of magnesium are required to react with 2.0 mol of hydrochloric acid? The equation for this reaction is Mg + 2HCl → MgCl2 + H2.
Answer:
1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.
Explanation:
The balanced reaction is:
Mg + 2 HCl → MgCl₂ + H₂
The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products. That is, the law of conservation of mass implies that the sum total of charges before and after the chemical reaction remains constant.
The relationships between the quantities of reactants consumed and products formed depend directly on this conservation law, and therefore can be determined by an equation that describes them. This equality is called the stoichiometric equation.
In this case, by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), you have:
Mg: 1 moleHCl: 2 molesMgCl₂: 1 moleH₂: 1 moleThen, 1 mole of magnesium are required to react with 2.0 mol of hydrochloric acid.
Answer:
1 mole of magnesium, Mg
Explanation:
The balanced equation for the reaction is given below:
Mg + 2HCl —> MgCl₂ + H₂
From the balanced equation above,
We can see clearly that 1 mole of Mg requires 2 moles of HCl.
Thus, 1 mole of magnesium, Mg is needed for the reaction.
Which of the following is the most important reason for people to carefully manage natural resources?
A.) Recycling facilities are being constructed around the world.
B.) Underground reserves of oil have not yet been discovered.
C.)Technology that uses natural resources more efficiently are being developed.
D.)The growing human population is putting increasing demands on natural resources.
Answer:
The growing human population is putting increasing demands on natural resources.
Explanation:
In an ecosystem, the most important reason for people to carefully manage natural resources is that the growing human population is putting increasing demands on natural resources.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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Use the information and table to answer the following question.
Scientists use either a melting år freezing point apparatus to determine the melting points of the following unknown compounds as part of
their investigation. Based on the melting points, the scientists determine the bond type and record the results in the table as shown.
Unknown Compound
Compound 1
Exhibits
Compound 2
Compound 3
Compound 4
Melting Point
772°C
17°C
960°C
-56°C
Which statement correctly identifies the ionic compounds and why?
A Compounds 1 and 3 are lonic. Because covalent compounds are composed of oppositely charged ions that are attracted to one
another, they require more energy to melt than ionic bonds.
O B. Compounds 2 and 4 are ionic. Because covalent compounds are composed of oppositely charged ions that are attracted to one
another, they require more energy to melt than ionic bonds.
C. Compounds 2 and 4 are ionic. Because ionic compounds are composed of oppositely charged ions that are attracted to one another,
they require more energy to melt than covalent bonds,
D. Compounds 1 and 3 are ionic. Because ionic compounds are composed of oppositely charged ions that are attracted to one another,
they require more energy to melt than covalent bonds.
Answer:
Explanation:
are you doing your mid term?well i got c
Answer:
D
Explanation:
Compounds 1 and 3 are lonic.Because ionic compounds are composed of oppositely charged ions that are attracted to one another,
they require more energy to melt than covalent bonds. just usign he process of elimination you get rid of A and B becuase covalant compound contaIN same negatively charged particles that contain requrie less energy to melt and since two and four have low melting point its d
Extra points if anyone can help me with those 2
Answer:
Blank 1 - Microscope
Blank 2 - Cell Theory
Explanation:
Answer:
microscope. and cell theory
Explanation:
with the invention of the microscope. scientists were able to create cell theory
How much energy is required to raise the temperature of 3 kg of iron from 20°
C to 25°C? Use the table below and this equation: Q = mcAT.
Answer:
The correct option is (c).
Explanation:
Given that,
Mass of iron, m = 3 kg = 3000 g
The temperature of ice increases from 20° C to 25°C.
The specific heat of iron is 0.45 J/g°C
We need to find the energy required to raise the temperature. The formula is given by :
[tex]Q=mc\Delta T\\\\Q=3000\times 0.45\times (25-20)\\\\Q=6750\ J[/tex]
So, 6750 J of energy is required to raise the temperature or iron.
what element is solid at room temperature shiny malleable and a good conductor of heat
Answer:
I believe that it would be copper because copper is all of those things.
Explanation:
How are the four kinds of DNA nucleotides different from each other?
Answer:
The sugar in DNA is deoxyribose. ... Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine. There are two groups of bases: Pyrimidines: Cytosine and Thymine each have a single six-member ring.
Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.
What are nucleotides ?Nucleotides are organic compounds made up of a phosphate and a nucleoside. They function as monomeric units of the deoxyribonucleic acid and ribonucleic acid polymers, which are both crucial macromolecules for all kinds of life on Earth.
Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA. The four nucleotides have different base structures, but they are all composed of a nitrogenous base, a deoxyribose sugar, and a phosphate group.
The quantity of phosphate residues that a nucleotide has determined its name. Adenosine triphosphate, for instance, is the name of a nucleotide that consists of an adenine base and three phosphate residues (ATP). Adenosine diphosphate would be the nucleotide if it has two phosphates (ADP).
Thus, Adenine, Cytosine, Thymine, and Guanine are the four nucleotides that make up DNA.
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How do heatwaves show physical and chemical changes
Answer:
An example of heatwaves showing physical and chemical change is with a burning candle, when a candle burns, there is both a physical and chemical reaction.
The physical change is quite obvious and in fact, it can be seen. When the candle burns, the wax slowly melts and the candle gets smaller and smaller. This wax, as can be seen, will drip onto the candle and stick to it. When this wax forms back into a solid and stays on the candle, that is another physical change that can occur.
The chemical reaction can be a little less obvious. The first is that the heat produced by the candle consumes both the oxygen around it, as well as the fuels coming from the flame. This will then lead to carbon dioxide emissions produced by the flame, which by the way should never be inhaled. This is the chemical change that takes place in the reaction.
What phase change occurs when a solid changes into a gas?
Answer:
Sublimation
Explanation:
Sublimation is the term used to describe when a solid "skips" the liquid phase and turns directly into a gas from solid form. Dry ice demonstrates sublimation when exposed to room temperature air.
Photosynthesis is a process that can be performed by many autotrophic organisms within the ecosystem. Without photosynthetic organisms, the food chain would not be able to sustain the energetic needs of the ecosystem. Whic statement compares the energy transformations that occur in the ecosystem within photosynthetic organisms?
A Solar energy is converted to thermal energy, which increases food availability for the ecosystem.
B Solar energy is converted into chemical potential energy, which is found in the products like glucose.
C Chemical erlergy in carbon dioxide is converted into solar energy, which provides a mechanism to produce food for the ecosystem.
D Kinetic energy of the reactants is converted to potentia. energy in the products, which can be metabolized within the ecosystem.
Answer:
B.
Solar energy is converted into chemical potential energy, which is found in the products like glucose.
Explanation:
According to photosynthesis phenomena ,the statement which compares energy transformations in ecosystem within photosynthetic organisms is statement B.
What is photosynthesis?It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy through the process of cellular respiration.
Some of the energy which is converted is stored in molecules of carbohydrates like sugar and starches which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.
The process begins with proteins absorbing light energy which are called reaction centers and contain a green pigment which is called chlorophyll . In plants ,these pigments are present inside organelles called chloroplasts while in bacteria they are present in plasma membrane.
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what do scientists use to deterimine the temperature of a star
why do men
thats it that’s the question
Explanation:
babe I wish I knew I would tell you
Answer:
Not all men are like this. It depends on how they were raised
3. Your friend's new car can go from 0 to 60 m/s in 7 sec. What is the acceleration?
Answer:
Initial velocity (u) = 0 m/s
Final velocity (v) = 60 m/s
Time (t) = 7 sec
Acceleration (a) = ?
a = (v-u)/t
a = (60-0)/7
a = 60/7
a = 8.57 m/s²
How much work does Bobby perform in pushing a 35 N crate a distance
of 4 meters?
Answer:
Here's the answer pretty thang = 140 N
Explanation:
List Known Values-
35N
4M
Formula-
W=FJ
Substitution-
W= 3.5N (4m)
Answer & Units-
140 N
Bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.
What is work?The work is something which need energy to be done it can be any physical or chemical energy that can be calculated with the help of Newton law.
Work is calculated by multiplying the force required for the work by the amount of movement of substance or object.
W = F × d here, W = work
F = force
d = distance
Substituting the value in the formula,
W = 35 × 4
W = 140 joules
Newton-meter is the same thing as a joule so the unit is joules.
Therefore, bobby perform in pushing a 35 N crate a distance of 4 meters the work done by him is 140 joules per second.
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The boiling point of a liquid is the temperature at which its ____________ _____________ is equal to ____________ ____________.(atmospheric pressure, vapor pressure
Answer:
vapor pressure, atmospheric pressure
Explanation:
the boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.
(I'm not too sure if this is right but I think it is)
What is the atomic mass of an element that has 6 protons, 7 neutrons, and 6 electrons?
6
7
13
19
Answer:
13
Explanation:
proton plus neutron equal to atomic mass
When does the object change direction?
Distance vs. Time
50
40
30
20
10
c
D
2
6
8
10
Time
F
Answer:
50distance and 10minutes time
Explanation:
because it's the best object