Answer:
YELLOW
Explanation:
How many joules of heat are needed to raise the temperature of 15g of aluminum from 28C to 99C if the specific heat of aluminum is .90 j/gC?
Answer:
In order to increase the temperature of 1 g of aluminium by 1∘C , you need to provide it with 0.90 J of heat
Explanation:
Why is the mitochondrion known as the "power house" of a cell?
Answer:
hey there !!
the mitochondrian is the cell organelle in which cellular respiration takes place and energy is produced during cellular respiration by break down of glucose in presence of oxygen to for energy units known as ATP ( adinosine tri - phosphate) molecule.
since it produces energy it is known as powerhouse of the cell.
i hope this helped.....you
What movements are involved in the relationship between the Earth and Sun? The Sun rotates around the Earth as it revolves to cause day and night. The Sun revolves around the Earth as it rotates to cause day and night. The Earth rotates around the Sun as it revolves to cause day and night. The Earth revolves around the Sun as it rotates to cause day and night.
Answer:
the earth revolves around the sun as it rotates to cause day and night.
Explanation:
the rotation of the earth is what expose different areas to receive sunlight which causes daytime whilst, the other side is facing away which causes night time.
Answer:The Sun rotates around the Earth as it revolves to cause day and night. The Sun revolves around the Earth as it rotates to cause day and night.
Explanation:it just does
2C2H6 + 7O2 ------> 4CO2 + 6H2O
If you are given 10 grams of C2H6 and 10 grams of O2 how many grams of H2O would you produce? Hint: find the limiting reactant. Answer should have 3 decimal places.
Right answer gets brainliest
We convert the masses of our reactants to moles and use the stoichiometric coefficients to determine which one of our reactants will be limiting.
Dividing the mass of each reactant by its molar mass:
(10 g C2H6)(30.069 g/mol) = 0.3326 mol C2H6
(10 g O2)(31.999 g/mol) = 0.3125 mol O2.
Every 2 moles of C2H6 react with 7 moles of O2. So the number of moles of O2 needed to react completely with 0.3326 mol C2H6 would be (0.3326)(7/2) = 1.164 mol O2. That is far more than the number of moles of O2 that we are given: 0.3125 moles. Thus, O2 is our limiting reactant.
Since O2 is the limiting reactant, its quantity will determine how much of each product is formed. We are asked to find the number of grams (the mass) of H2O produced. The molar ratio between H2O and O2 per the balanced equation is 6:7. That is, for every 6 moles of H2O that is produced, 7 moles of O2 is used up (intuitively, then, the number of moles of H2O produced should be less than the number of moles of O2 consumed).
So, the number of moles of H2O produced would be (0.3125 mol O2)(6 mol H2O/7 mol O2) = 0.2679 mol H2O. We multiply by the molar mass of H2O to convert moles to mass: (0.2679 mol H2O)(18.0153 g/mol) = 4.826 g H2O.
Given 10 grams of C2H6 and 10 grams of O2, 4.826 g of H2O are produced.
1 point
Your friend over in England that had the TV from last test now wants to
send you 3.87x10^23 atoms of gold in exchange for your 3.87g of Au.
Indicate which sample has more gold, your or your friends sample? *
Your Sample
Friends Sample
1 point
How much does your friend's sample of gold from the previous question
weigh? *
Your answer
Answer:
Your sample is the correct answer
8. What is a compound?
A. a substance in which the atoms of three or more elements are combined together
B. an atom with more electrons than protons
C. a substance in which the atoms of two or more elements are combined together
D an atom with more neutrons than protons
Answer:
c
Explanation:
What happens to an atom that experiences radioactive decay?
O A. It loses mass.
B. It absorbs energy.
C. It gains electrons.
D. It burns up.
Answer:
I think the answer is a
Explanation:
An atom loses mass when the atom experiences radioactive decay.
What is radioactive decay?
Radioactive decay is when the balance of protons and neutrons in the nucleus isn't quite right, so it emits particles and energy.
Radioactive decay is when the nucleus of an atom isn't stable - it could have too many protons that push each other apart, or too many neutrons, and it's just like a big lump of rock and can fall apart.
There are three kinds of radioactive decay, all named after Greek letters: alpha (α), beta (β) and gamma (γ).
α-decay happens in unstable nuclei and an α-particle is emitted, which is equivalent to the helium nucleus. Two protons and two neutrons are emitted, reducing the total mass number by four and the atomic number by two, making the atom into a new, smaller, more stable element.β-decay is when you've got too many neutrons, so a neutron decays into a proton. γ-decay is where the atom emits a photon with the wavelength of a γ-ray.Hence, option A is the correct answer.
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I need help with this :/
Answer:
Blank 1: 1
Blank 2: 2
Blank 3: 1
Blank 4: 1
Explanation:
Assuming this is to balance the equation, write out the amount of each element you have on the reactants side and on the products side
Reactants Products
Ca 1 Ca 1
C 2 C 2
H 2 H 4
O 1 O 2
Comparing the two, we can see that hydrogen and oxygen have different amounts between reactants and products. Therefore, we need to multiply by some number to get the two equal. If we multiply the reactants by 2 we will get the correct amount in the products. So we put a 2 in front of the H₂O to signify this.
The balanced chemical reaction is
CaC₂ + 2 H₂O --> C₂H₂ + Ca(OH)₂
What is the method of harvesting trees during logging where a small number of
mature trees are left intact called ?it’s for a crossword puzzle and it consists of two words and together they should have 17 letters
I need the 3 questions !!! About Rubidium (Rb)
ASAP PLEASE DUE IN LIKE 20 min
Answer:
419kJ/mol 5,0,0,+12That catches fire spontaneouslyExplanation:
1. Topic: Chemistry
ElementFirst Ionization Energy (kJ/mol) Lithium520Sodium496Rubidium403Cesium376According to the above table, which is most likely to be the first ionization energy for potassium?
536kJ/mol 504kJ/mol 419kJ/mol 391kJ/mol 358kJ/mol2. Topic: Chemistry, Atom
The correct set of four quantum numbers for the valence electrons of the rubidium atom (Z=37) is:
5,1,1,+12 5,0,1,+12 5,0,0,+12 5,1,0,+123. Rubidium and cesium are pyrophoric. Here the term pyrophoric means:
That hardly catches fireThat does not catch fire at all That catches fire spontaneously None of theseNitric acid is a Chemical that is used in production of fertilizer. The chemical formula of Nitric acid is HNO3, which of the following are true for a nitric acid molecule
It has three nitrogen Atoms
It has three different types of Adams
It has three atoms
it has the oxygen atoms
Answer:
It has three different types of Atoms
it has three oxygen atoms
Explanation:
Nitric acid has the chemical formula HNO3. It is a mineral acid that is very useful as a precursor in fertilizer production.
There are three different kinds of atoms present in a molecule of nitric acid. These atoms are
nitrogenhydrogenoxygenThere are three oxygen atoms in the molecule and one atom of hydrogen and nitrogen respectively.
Long scratch marks that are left behind as evidence of glaciers are called
A. striations
B. cirques
C. fjords
D. roche moutonnees
Answer:
it is A striations
Explanation:
..........
Answer:
Striation
Explanation:
PLZ HELP IM CONFUSED
How many moles of methanol would be created if you started the reaction with 36.7 g of hydrogen gas?
(Round to 1 decimal place.)
Molar Masses:
H2= 202 g/mol
CO = 28.01 g/mol
CH3OH = 32.04 g.mol
Answer:
9.1 mol
Explanation:
The balanced chemical equation of the reaction is:
CO (g) + 2H2 (g) → CH3OH (l)
According to the above balanced equation, 2 moles of hydrogen gas (H2) are needed to produce 1 mole of methanol (CH3OH).
To convert 36.7 g of hydrogen gas to moles, we use the formula;
mole = mass/molar mass
Molar mass of H2 = 2.02g/mol
mole = 36.7/2.02
mole = 18.17mol
This means that if;
2 moles of H2 reacts to produce 1 mole of CH3OH
18.17mol of H2 will react to produce;
18.17 × 1 / 2
= 18.17/2
= 9.085
Approximately to 1 d.p = 9.1 mol of methanol (CH3OH).
How much heat is required to raise the temperature of 250.0 g of mercury by 52 degrees * C with a specific heat of 4.18
To raise the temperature of 250.0 g of mercury by 52°C with a specific heat capacity of 4.18 J/ g°C the heat required is 5.434×10¹ kJ.
What is specific heat capacity ?For a substance, it's specific heat capacity is the amount of energy required to raise the temperature of unit mass of that substance by 1°C.
If, specific heat capacity (c) = 4.18 J/ g°C
Mass of the substance (m) = 250.0 g
Change in temperature (ΔT) = 52°C
Energy (Q) = ?
Then mathematically the relation could be represented as
c = [tex]\frac{Q}{ \ m \ (\Delta\ T )}[/tex]
Therefore, [tex]Q = m\times c \times (\Delta\ T)[/tex]
[tex]Q = 250 \times 4.18 \times 52[/tex]
[tex]Q = 54,340 J\\Q = 5.434 \times 10^1 kJ[/tex]
So, to raise the temperature of 250.0 g of mercury by 52°C with a specific heat capacity of 4.18 J/ g°C the heat required is 5.434×10¹ kJ.
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How can both the pitcher and the glass contain the same volume of iced tea?
Answer:
Because of their spaceeeee isss different
4 main parts of a flower Include the function of each pls help me
Answer:
Calyx or sepalsCorollaAndroeciumGynoeciumWhat type of plant rarely grows in the grasslands?
Add labels for mass extinction and adaptive radiation:
Answer:
Couldn't figure out how to edit the other one to attach the image, but here is it with the labels. Also put the same explanation down below so you don't have to go to the other if you wanted to look at it in conjunction with the image.
Explanation:
Mass extinctions are periods of time where the organisms are essentially wiped out in an extremely brief period of time. You can see how the species just drops off. Adaptive radiation occurs when there is a diversification of a group of organisms as evident by the rise in the number of marine animal groups shown by the bracketed area.
One of the leading contributors to climate change is the burning of fossil fuels such as natural gas and oil. Name four things people use every day that directly or indirectly consume fossil fuels. Explain your reasoning.
Answer:cars
Explanation:bc it uses oil
Cars and trucks, coal-fired power plants, airplanes, large industrial operations are the four things people use every day that directly or indirectly consume fossil fuels.
What are fossil fuels?A fossil fuel is a hydrocarbon containing substance that is recovered and used as fuel that naturally forms in the Earth's crust from the remains of dead plants and animals. Fossil fuels include coal, oil, and natural gas.
A general name for non-renewable energy sources such crude oil, petroleum products, natural gas, derived gas, coal, coal products, and non-renewable wastes is "fossil fuel."
These fuels come from plants and animals that lived in the distant past of the earth's history, such as millions of years ago.
Therefore, fossil fuels can be burned to produce energy, operate engines, or offer direct heat.
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When(NH4)2SO4(aq) and Ba(NO3)2(aq) react
Answer:
1 (NH4)2SO4 + Ba(NO3)2 → NH4NO3 + BaSO4
2 (NH4)2SO4 + Ba(NO3)2 → Ba(SO4) + (NH4)(NO3)
Explanation:
How many grams of carbon dioxide gas are in a 1.0 L balloon at STP?
0.509 g
1.96 g
22.4 g
44.0 g
Answer:
I'm pretty sure its 1.96g
At what point will potential energy be the highest? The object has a mass of 5 kg
Explanation:
Given that,
The mass of the object, m = 5 kg
We need to find the maximum potential energy. When the height of the object is maximum it will have the maximum potential energy.
The attached figure shows that the maximum height is 25 m. The formula for the potential energy is given by :
[tex]P=mgh\\\\P=5\times 9.8\times 25\\\\P=1225\ J[/tex]
So, when the height is 25 m, the object will have the highest potential energy.
Please help me I need to finish before my class is over
Number 3 is D
Number 4 is B
Number 5 is B
I think
Answer:
Number 5 is b is the correct answer
Which of the following would most likely be found in the outer cloud
region?
Answer:
there is no "following". if you can attach an image for me, ill be glad to help.
Explanation:
have a good day,
~evita
I really need your help!!!!! Correct answers only, look at the picture.
Answer:
Student 2. Sugar dissolves the fastest in hot liquids, which means immediately stirring it in a hot liquid and THEN adding a colder one will yield the best results.
Explanation:
This is actually how I was always taught to make sweet tea.
What are the units of molar mass?
O A Lg
B. g/mol
O C. g/L
D. mol/g
Answer:
The answer is B.units of molar mass are g/mol
If 25.0 g of iron(III) phosphate reacts with excess sodium sulfate, how many molecules of sodium phosphate can be made?
Answer:
so mucjsuat least amount of soduim is will be 25percent
● Human blood has a hydrogen ion concentration is 10-7.4 mol/L. What is the pH of the blood?
Explanation:
PH=14-POH
=14-2.6
=11.4
When two or more simple machines are combined they form a(n) ____.
A. Compound machine
B. Complex machine
C.intricate machine
D.inefficient machine
Answer:
A
Explanation:
A compound machine is a combination of two or more simple machines.
I have too much rainfall in a short time period. My victims must be rescued from the top of houses and their property is in ruins. What am I?
Answer:
a flash flood