how many grams of co are needed to react with fe2o3?
Answer:
419 grams of CO are needed.
Explanation:
Non Metal _________ electrons and form _________________ ion , called __________
Answer:
Non Metal atoms gain electrons and form negative ion, called anions
What are the component of science?
What are the descriptions?
How does it form?
Hope you can answer properly
^_^ ❤☺
[tex] \large \text{Answer} \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ [/tex]
1.ans: observations, questions, hypothesis, methods and results are the five components of scientific method.
2.ans: written account of object.
3.ans: sry I didn't get
hope my 2 answers can help you ࿐❤
Answer:
1) Sience involves six kinds of components:
• Problems
• Attitudes
• Methods
• Activities
• Conclusions
• Effects
2) Knowledge is information or information that is known or realized by someone.
3) Science form:
• Direct knowledge (direct)
• Indirect knowledge (mediated)
• Sensory knowledge (perception)
• Conceptual knowledge (conceptual)
• Particular knowledge (special)
• Universal knowledge (universal)
Explanation:
I hope this help :)
Indique cuáles son las unidades de la molaridad *
eq-g/m³
eq-g/L
mol/cm³
mol/L
Answer:
hm
Explanation:
How can air pollution affect plants
A. Air pollution can block sun light from reaching plants
B. Air pollution can affect the water plants need.
C. Air pollution absorbs carbon dioxide.
D. Air pollution can change normal temperatures of a region.
Answer:
A
Explanation:
B) pollution doesn't affect water
C) Air pollution makes carbon dioxide
D) air pollution does not affect temperature
The majority of which type of dancing was created in African American communities? Tap Ballet Ballroom Swing. Plz help thx <3
Answer: if it’s a multiple choice then it should be swing dances
Explanation:While the majority of swing dances began in African American communities as vernacular African American dances, some influenced swing-era dances, like Balboa, developed outside of these communities.
What causes a change in speed or direction?
A) Balanced Force
B) Net Force
C) Force
Answer:
force i think
Explanation:
What happens when you drop an egg on the ground from about 6 ft high?
Answer:
Gravity causes an object to fall to Earth when dropped. When the egg hits the ground with a given force, the ground exerts the same force back on the egg. If too large a force is delivered to the egg shell, the egg will crack.
Explanation:
Which of these metric prefixes represent 1000?
(A). Centi
(B). Ecto
(C). Kilo
(D). Milli
pls help me pls cuz i need a good grade
1. The heat of combustion is a negative value. Do you think this indicates an exothermic or endothermic reaction? Explain.
Answer:
Exothermic
Explanation:
Combustion reactions are almost always exothermic because it is an oxidation reaction that produces heat and in this case it would be considered to be exothermic but there are few cases in which it would be considered endothermic. Combustion of Nitrogen is endothermic because Δ is positive despite being a combustion reaction.
The density of gold is 19. 3 g/cm3. What is the volume of a 13 g gold nugget? (Density: D = ). 25 cm3. 67 cm3 1. 48 cm3 2. 50 cm3.
Answer:
0.67 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass = 13 g
density = 19.3 g/cm³
We have
[tex]volume = \frac{13}{19.3} \\ = 0.673575...[/tex]
We have the final answer as
0.67 cm³Hope this helps you
14. Which of the following is true of the nucleus?
(a) The nucleus is considered the control center of the cell.
(b) The nucleus contains all the cell’s DNA.
(c) All cells have a nucleus.
(d) all of the above
A chemist heats a fixed amount of gas in a sealed glass container. Which law is the chemist most likely
investigating? (1 point)
O Charles's law, by seeing how changes in temperature affect the volume of the gas
O Charles's law, by seeing how changes in temperature affect the pressure of the gas
O Gay-Lussac's law, by seeing how changes in temperature affect the volume of the gas
O Gay-Lussac's law, by seeing how changes in temperature affect the pressure of the gas
The chemist is most likely investigating Gay Lussac's law. To study the changes in temperature affect the pressure of the gas when a fixed amount of gas is heated in a sealed glass container. Therefore, option (D) is correct.
What is Gay Lussac's law?Gay-Lussac's law states that when the volume of the gas is kept constant the pressure of a gas is directly proportional to the absolute temperature.
The mathematical expression of Gay Lussca's law can be written as follows:
P/T = k
It can be also represented as the pressure being directly proportional to the temperature of the gas.
P ∝ T (where V volume of gas is constant)
or
[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2}[/tex]
Where P₁ and T₁ are the initial temperature and pressure of the gas. The P₂ and T₂ are the final temperature and pressure of the gas.
As the container is sealed on heating the volume of the gas will not change. On increasing the temperature the molecules of the gas acquire more and more kinetic energy. So the pressure of the gas will increase.
Therefore, the chemist is investing the Gay-Lussac's law by noticing how changes in temperature affect the pressure of the gas.
Learn more about Gay Lussac's law, here:
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please help quickly i will give 15 points
1. Calculate the grams of solute contained in 450. mL of a 0.075 M solution of CuCl2.
Answer:
4.6 grams CuCl2
Explanation:
Since molarity is a representation of moles per liter, we first want to convert 450. mL to liters:
450. mL * 1 L/1000 mL = 0.450 L
Now, we can use this number and the molarity to figure out the answer:
0.075 M means that for every liter, there is 0.075 moles of CuCl2. Thus, we can multiply the amount of moles per liter by the number of liters of solution.
0.075 moles/1 L * 0.450 L = 0.03375 moles
Then, we need to round this to the appropriate number of significant figures, which gives us:
0.034 moles CuCl2
Next, we can find the grams of CuCl2. To do this, we first need to find the molar mass of CuCl2. The molar mass of Cu is 63.546 g/mol and the molar mass of Cl is 35.453 g/mol, so the molar mass of CuCl2 is as follows:
(1 Cu * 63.546) + (2 Cl * 35.453) = 134.45 g/mol CuCl2
Now, we can multiply the grams per mole by the number of moles of CuCl2 in our solution:
134.45 g/mol * 0.034 moles = 4.5713 grams = 4.6 grams CuCl2, rounded to the appropriate significant figures.
convert 120 mm to feet
Answer:
0.393701
Explanation:
If a car is moved 10 meters and 3 Newton's of force is needed to move the car, what amount of workhas
been done?
Work required = 30J
This is because work = F * x
F (Newton's force) = 3N
x (car moved) = 10m
Work = 3 * 10 = 30J
which is larger 0.45 mol of a material or 2.75×10^23 of the same material?
4 Fe + 3 O2 ----> 2 Fe2O3
How many moles of iron(III) oxide, Fe2O3 , will be produced if 4 moles of iron, Fe, are consumed.
Answer:
320 gm
Explanation:
4 Fe + 3 O2 ----> 2 Fe2O3 How many moles of iron(III) oxide, Fe2O3 , will be produced if 4 moles of iron, Fe, are consumed
for every 4 moles of Fe, 2 moles of Fe2O3 are produced.
Fe2O3 has a molar mass of (56 X 2) + (16 X 3) = 112 + 48 =160
160 X 2 =320 gm
What do we call the things we see around us? *
15 points
a. ecosystem
b. environment
c. matter
d. density
:::: Answer ::::
C. matterwrite the steps you would use for making tea. use the words solution, solvent, dissolve, soluble, insoluble, filtrate and Residue.
[tex] \large \text{Answer} \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ [/tex]
take a few cups of water in a pan and and heat it on a gas burner . the hot water , add some dark brown mixture . then add sugar and milk. sugar is a solute which dissolves in hot water to form a solution . after boiling put some more time , mixture is filtered through a tea - strainer . the prepared tea passes through the tiny holes of the tea - strainer and collects as of filtrate in the cup placed below. the used tea - leaves , being isoluble , collect as a Residue in the the tea - strainer .
〽hope it helps you ✅
Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen bromide (hbr)
[tex]\\ \sf\longmapsto H_2+Br_2\longrightarrow HBr[/tex]
Balanced equation[tex]\\ \sf\longmapsto H_2+Br_2\longrightarrow 2HBr[/tex]
On reactant side:-
H=2Br=2On products side
H=2Br=2The balanced chemical equation for the synthesis of hydrogen bromide is [tex]\rm H_2\;+\;Br_2\;\rightarrow\;2\;HBr[/tex].
What is a balanced chemical equation?The balanced chemical equation has been given as the reaction in which the number of atoms for each element on the product and the reactant side is equal.
The HBr has been formed with the reaction of the hydrogen and the bromine. The balanced chemical equation for the reaction has been:
[tex]\rm H_2\;+\;Br_2\;\rightarrow\;2\;HBr[/tex]
Learn more about the balanced chemical equations, here;
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what kind of molecule is a polymer??
Answer:
macromolecules
Explanation:
Polymer is composed of molecules called macromolecules that have multiple of simpler chemical units called monomers.
12. The smallest unit of an element that has all of the properties of the element is a/an
A. molecule.
B. cell.
C. atom.
D. neutron.
Answer:
Explanation:
You have given the exact definition of what an atom is. It is the smallest entity that has all the same properties as a bunch of atoms put together.
Write the balanced equation!!
Acid-Base Reactions: HA + BOH → BA + H2O
Sulfuric Acid, H2SO4 (aq) + potassium hydroxide (aq) potassium sulfate (aq) + water (l)
Answer:
H2SO4 + 2KOH + K2SO4 + 2H2O
Explanation:
there are 2 potassium atoms on the left side so gotta balance that and 2 for the H in the KOH so we have to add a 2 for the hydrogen in H2O..I hope this is useful..
An unknown substance dissolves in water but separates and floats in oil.
Answer:
Any polar substance
Explanation:
We know that non polar substances wont dissolve in water because they do not react properly with water molecules, any polar substance would dissolve in water and float in oil.
An unknown substance dissolves in water but separates and floats in oil is any polar substance.
What are polar substances?Polar substance are defined as those whose bonding with atoms like nitrogen, oxygen, or sulfur has resulted in discrete positive and negative charge areas.
It can also be defined as an electrical pole is typically created when a molecule has more positive charges on one end than negative charges on the other, forming an electrical pole.
Non polar substances are defined as a molecule that lacks charges at the ends because its electrons are evenly distributed and those that cancel one another out symmetrically.
It is can also be defined as in covalent compounds, there is no change in electronegativity.
Thus, an unknown substance dissolves in water but separates and floats in oil is any polar substance.
To learn more about polar substances, refer to the link below:
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PLEASE EXPLAIN what is glucose
Answer:
(Hope this helps can I pls have brainlist (crown)☺️)
Explanation:
Glucose is the most common form of sugar in the blood and the body's primary source of energy. Glucose is derived from the meals we eat or produced by the body from other chemicals. The circulation transports glucose to the cells. Several hormones, including insulin, regulate blood glucose levels.
a simple sugar that is a component of many carbohydrates and is a vital source of energy in living things.
Blood sugar, often known as glucose, is the most common sugar present in the body. It is your body's major source of energy and comes from the food you eat. Glucose is carried by your blood to all of your body's cells, where it is used for energy.
How many silicon atoms are in a typical computer microchip (0.001 g of silicon)?
The number of silicon atoms in atypical computer chips(0.001g of silicon) is 2.14 × 10¹⁹ atoms
The atomic mass of silicon = 28.0855 amu
Using the mole concept that 1 mole = 6.022 × 10²³.
This number is called the Avogadro's number.
Therefore,
1 mole / 28.0855g of silicon contains 6.022 × 10²³ atoms of silicon
0.001 g will contain ? atoms of silicon
cross multiply
number of atoms of silicon = 6.022 × 10²³ × 0.001 / 28.0855
number of atoms of silicon = 6.022 × 10²⁰ / 28.0855
number of atoms of silicon = 2.14 × 10¹⁹ atoms
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Which two statements are true for both compounds and mixtures?
A. They are made up of more than one type of atom.
B. Their particles all have the same chemical formula.
C. They can be separated into two or more elements.
D. Their particles are held together by chemical bonds.
Answer:
B and C
Explanation:
A. Their particles are held together by chemical bonds.
This option is incorrect for both compounds and mixtures. It is only true for Compounds.
B. They are made up of more than one type of atom.
This is correct. Both compounds and mixtures consists of different atoms of elements.
C. They can be separated into two or more elements.
This option is correct. Compounds are broken down into elements through chemical means.
D. Their particles all have the same chemical formula.
This is wrong. Mixtures do not have a chemical formula