Answer:
I think F
Explanation:
what happens when hydrogen gas is passed over hot ferric oxide
Answer:
When hydrogen is passed over hot ferric oxide (FeO) hydrogen reacts with oxygen present in the compound and forms water (H2O) and pure Iron
Explanation:
Answer:When hydrogen gas is passed over hot copper oxide, the black coating on the surface turns brown as the reverse reaction takes place and copper is obtained.
Explanation:
Deposition can occur where wind or running water slows down? true or false
Answer:
The answer is True.
Explanation:
True or False Weather is the condition or earth's atmosphere at a certain place and time.
Answer:
True
Explanation:
Weather is short term, climate is over the long term
Answer:
true, different weather patterns are found all around the world at different times, there could be a hurricane in the gulf of mexico and as a result of the storm tornadoes could break out in texas
Explanation:
A sample of compound A (a clear, colorless gas) is analyzed and found to contain 4.27g carbon and 5.69g oxygen. A sample of compound B (also a clear, colorless gas) is analyzed and found to contain 5.19g carbon and 13.84g oxygen. Are these data an example of the law of definite proportions, the law of multiple proportions, or neither? What do these data tell you about substances A and B?
Answer:
law of multiple proportions
Explanation:
The law of multiple proportions states that, if two elements A and B, combine to form more than one chemical compound. Then the various masses of one element A, which combine separately with a fixed mass of element B are in simple multiple ratio.
We can see that the ratio of oxygen that combines with carbon in the two compounds( A and B) is 1:2. This demonstrates the law of multiple proportions.
The substances A and B must be CO and CO2 respectively.
The image shown here is a good illustration of which law?
Answer:
3rd law
Explanation:
His third laws states that every action has an equal and opposite reaction. because you are putting force on your wall, the wall is giving the force of wall on your finger.
How many atoms are in 123 g of calcium
Answer:
Molar mass of Ca = 40 g / mol , given 123 g Ca is 123/40= 3.075 moles,
1 mole = 6.022 * 10^23 atoms, so 3.075 moles Ca= 18.51*10^23 atoms
Explanation:
The number of atoms present in 123 g of calcium is 18.51 x 10²³ atoms.
What is calcium?Calcium is an element present in the periodic table. It is very much needed for the strength of the bones and teeth.
"Molar mass of many compounds can be calculated by dividing the mass of the compound by the number of moles of the compound."
"The mole is a SI unit of measurement that is used to calculate the quantity of any substance".
First, calculate the moles
Moles = mass / molar mass
Molar mass of Ca = 40 g / mol
Given 123 g Ca is mass
123 / 40 = 3.075 moles,
1 mole = 6.022 x 10²³ atoms,
6.022 x 10²³ is the Avogadro number. It equals to one mole.
So 3.075 moles Ca= 18.51 x 10²³ atoms.
Thus, the number of atoms present in 123 g of calcium is 18.51 x 10²³ atoms.
To learn more about atoms, refer to the below link:
https://brainly.com/question/11763544
#SPJ2
a rock that is pushed down a hill represents both potential and kinetic energy. which statement best represents the energy transformation involved in this scenario
Explanation:
kinetic energy Increases due to gravity. A rock being pushed down a hill increases in speed, due to gravity, what goes up must come down....
WORTH 18 POINTS! MY LIFE DEPENDS ON THIS ANSWER!!!
Which compound listed below is most likely to have to following properties?
-solid at room temperature
- high melting points
-solble in water
-conductive when dissolved
1.sodium chloride
2.carbon monoxide
3.nitrogen trifluoride
4.none of these compounds could have all of the properties listed
Answer:
1.sodium chloride
Explanation:
because the others dont have all the listed properties
It’s a simple question in Welding when you use a torch if you add a lot of oxygen to the fuel what happens does it burn faster or what I want to know
Answer:
Easy, the flame is smaller but burns hotter.
Explanation:
help me out pleaseeee
Answer:
Help with what?
When going down a slope on a roller
coaster, does your stomach actually
move up?
Answer:
yes
Explanation:
due to gravity &hggggggggg%ggghhbvvvghh
As human populations grow, it becomes more important to use renewable sources of energy Which of the following objects uses energy from a renewable source?
a stove that is powered by natural gas
a refrigerator that runs on solar power
a lantern that burns oil from beneath Earth's surface
a foaster that uses electricity from a coal-burning power plant
Explanation:
Moreover, increasing use of fossil fuels also causes serious environmental problems. Hence, there is a pressing need to use renewable energy sources like solar energy, wind, tide, biomass and energy from waste material. (i) it reduces the dependence on fossil fuels for energy. (ii) they donot produces pollution.
11) How many moles of CO2 can be produced from
5.0 moles of O2?
Answer:
3.6 moles
Explanation:
5.0moles produce 44g/x will produce 32g the answer is a3.6moles
What is a personal factor of resilience?
A. Feeling of belonging
B. Family and friends
C. Genetics
D. Coping Mechanisms
Answer:
B
Explanation:
B is a personal factor of resilience
Which of the following elements would be considered a compound? CH, Si, F, O6
Answer:
CH
Explanation:
CH, a typical sample of the compound contains one atom of carbon (C) to one atom of hydrogen (H).
How do you write 0.000157 in scientific notation
Answer:
1.57 × 10^-4
one point five seven times ten to the power of negative four
David went shopping with his mom for house renovations supplies. They were looking for materials that would conduct electricity. Which material should they buy?
Copper
Glass
Plastic
Wood
Answer:
this will copper this is correct answer
Question asked: David went shopping with his mom for house renovations supplies. They were looking for materials that would conduct electricity. Which material should they buy?
Answer: Copper
Explanation: Copper would be the right answer because that's the only material that would conduct electricity.
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I hope this helps!
(ILL GIVE 100 POINTS AND EDIT IT AND MARK BRAINLIEST) Examine the diagram of the cell cycle. Which label identifies the stage in which the DNA is copied and the cell grows? W X Y Z
Answer:
where is diagram. sorry.
plz help as soon as you can
Oil of Vitriol is a substance that humankind has used for thousands of years! Today the substance is known by its scientific name sulfuric acid and has the molecular formula H2SO4. What is the molar mass of H2SO4?
Question 2 options:
49.067 g/mol
73.29 g/mol
98.08 g/mol
148.72 g/mol
Answer:
98.08 g/mol
Explanation:
Hope this helps.
Is the study of matter and energy complete, or do you think there’s still new information to discover?
Answer:
Physical science, in turn, can be divided into chemistry and physics. Chemistry is the study of matter and energy at the scale of atoms and molecules. ... Physics is the study of matter and energy at all scales—from the tiniest particles of matter to the entire universe but i dont really know if there is new information to discover
Explanation:
hope it help and if it doesnt sorry ;)
How many hydrogen atoms are in the compound represented by the following bond-line drawing?
ОН
Answer:
Theres no drawing
Explanation:
Show drawing
Skeletal structural diagram and bond-line drawing are similar;
Parts of the question appear missing: The number of hydrogen atoms in the attached example bond-line drawing is 6 hydrogen atoms
The reason the above value is arrived at for the attached example bond-line diagram is as follows;
A bond-line drawing is the diagram showing the molecular structure of a compound, such that covalent bonds within the molecule are represented by lines with the number of lines indicating the number of covalent bonds.
A single covalent bond is represented by one line, double bonds by two lines while three parallel lines represents a triple bond.
In bond-line drawing, the lines symbolically infer the carbon to carbon bonds while the bonds to the hydrogen atoms are implied noting that each carbon has four covalent bonds. Hydrogen atoms attached to other heteroatoms are indicated with an H.
The number of hydrogen shown in the example diagram can be found by noting that the number of covalent bonds between the carbon atoms are three, therefore, the atom of the fourth bond not shown with a line is to a hydrogen atom
There are six such carbon atoms, one of which is attached to an oxygen atom, which gives five hydrogen atoms located on the ring
There is one more hydrogen atom attached to the oxygen in the hydroxyl group, the total number of hydrogen is therefore;
5 hydrogen on ring + One hydrogen in the hydroxyl group = 6 hydrogen atoms
Learn more about bond-line drawing here:
https://brainly.com/question/13265901
Suppose of nickel(II) bromide is dissolved in of a aqueous solution of potassium carbonate. Calculate the final molarity of nickel(II) cation in the solution. You can assume the volume of the solution doesn't change when the nickel(II) bromide is dissolved in it. Round your answer to significant digits.
The question is incomplete, the complete question is;
Suppose 1.87g of nickel(II) bromide is dissolved in 200.mL of a 52.0mM aqueous solution of potassium carbonate. Calculate the final molarity of nickel(II) cation in the solution. You can assume the volume of the solution doesn't change when the nickel(II) bromide is dissolved in it. Be sure your answer has the correct number of significant digits. The answer is needed in M.
Answer:
0.0428 M
Explanation:
The equation of the reaction is;
NiBr2 + K2CO3 → NiCO3 + 2KBr
Number of moles of NiBr2 = mass/molar mass = 1.87 g/218.53 g/mol =
8.557 * 10^-3 moles
Now, we know that the Ni^2+ comes from the NiBr2. Also, the concentration of Ni^2+ in NiBr2 = concentration of Ni^2+ in NiCO3
So,
Concentration of Ni^2+ = 8.557 * 10^-3 moles/0.2 L = 0.0428 M
1. What is the molar mass of Al2S3?
Answer:
150.17 g/mol
Explanation:
Carbon dioxide non examples? Please and catalyst non examples?
Answer:
I guess you mean by non element example. Non element examples have more than one elements. Carbon dioxide is a non element example since caebon dioxide has 2 oxygen atoms + 1 carbon atom = carbon dioxide.
I think catalyst is also a non element example because catalyst is inorganic which means that it is not a living thing. Since catalyst is in brass and brass is a non element example, I think catalyst is also a non element example.
Hope that helps, thank you !!
Which color of light does a green object absorb?
Answer:
Magenta.
Explanation:
Color absorption is a process that occurs when a light wave strikes an object. When a light wave strikes an object it either absorbs color or transmits the color, or reflects the color. When a light wave strikes a green object, it absorbs a magenta color.
Magenta is a combination of red and blue light, therefore, the colors that the green object will absorb is red. blue, or magenta light.
Compare the two shampoo
Answer:
Explanation:
I think you forgot to attach an image here!
The increase in electro negativity when moving left to right on the periodic table can be explained by what?
Answer: Decrease in size
Explanation:
Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself.
On moving across a period from left to right, the size of an atom decreases because the electrons get added to the same shell and the nuclear charge keeps on increasing. Thus the electrons get more tightly held by the nucleus.
As, the size of an element decreases, the valence electrons come near to the nucleus. So, the attraction between the nucleus and the shared pair of electrons increases. Thus electronegativity increases.
A solution is prepared by dissolving 10.6 g sodium carbonate in enough water to produce
500.0 mL solution. What is the molarity of sodium carbonate in the solution?
Answer:
0.2mol/dm³
Explanation:
Given parameters:
Mass of Na₂CO₃ = 10.6g
Volume of solution = 500mL
Unknown:
Molarity of solution = ?
Solution:
The molarity of a solution can be determined using the expression below:
Molarity = [tex]\frac{number of moles }{volume}[/tex]
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of Na₂CO₃ = 2(23) + 12 + 3(16) = 106g/mol
Number of moles = [tex]\frac{10.6}{106}[/tex] = 0.1mol
Convert mL to dm³;
500mL will give 500 x 10⁻³dm³or 0.5dm³
So;
Molarity = [tex]\frac{0.1}{0.5}[/tex] = 0.2mol/dm³
1.A cup of coffee with cream and sugar is a mixture (true or false)
2.give two examples of mixtures you see everyday in life
3.Look at the pictures of methods of separating a mixture and write down the correct names under each picture
(pictures are attached)
Help pls!!!!!!!!!!!!!
Answer:
3rd
Explanation: