1 poin
2) Iron is found in the Earth as iron
oxide (Fe203). Iron oxide is reduced
to produce iron. Balance the equation
for the reaction: ...Fe2O3 + ..... →
.....Fe + .....CO2
Your answer
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Need help with this 1 question ASAP POINTS ADDED
Answer:
Atomic number hopefully this will help
Atomic number
Explanation:
because chemical elements are organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number (example of it increasing)Obtaining crude oil for refining is an example of
A. Constructive occupation
B. Extractive occupation
C. Manufacturing occupation
D. Tertiary occupation
E. Service occupation
Answer:
B: extractive occupation
ANYONE HELP MEE!! ASAP!
Answer:
The energy of the molecules in the apple decreased.
Explanation:
A.
Which kind of wind is most likely responsible for the movement of this
weather system from Dallas to St. Louis and then to Pittsburgh?
A. Southern polar easterlig
B. Westerlies
C. Northern polar easterlies
D. Trade winds
SUBMIT
Answer: Westerlies
Explanation:
Answer:
B. Westerlies
Explanation:
I got ir right
how many grams of hydrogen gas are needed to react with 688 grams of oxygen to make water? (3 sig figs)
Answer:
86 g H₂
Explanation:
The reaction between hydrogen gas (H₂) and oxygen gas (O₂) to produce water (H₂O) is described by the following balanced chemical equation:
2 H₂(g) + O₂(g) → 2 H₂O(g)
As we can see, 2 moles of H₂ reacts with 1 mol of O₂. We have to convert the moles to mass by using the molar mass (MM) of each compound:
MM(H₂) = 1 g/mol x 2 = 2 g/mol
2 moles H₂ = 2 mol x 2 g/mol = 4 g
MM(O₂) = 16 g/mol x 2 = 32 g/mol
1 mol O₂ = 1 mol x 32 g/mol = 32 g
Thus, 4 grams of H₂ reacts with 32 g of O₂. The stoichiometric ratio H₂/O₂ is 4 g H₂/32 g O₂. So, we multiply the stoichiometric ratio by the mass of O₂ we have (688 g) to calculate the grams of H₂ we need:
4 g H₂/32 g O₂ x 688 g O₂ = 86 g H₂
When an atom loses an electron, the resulting charge on the atom is ____
Answer:
Positive
Explanation:
The atom will gain a positive charge by losing an electron
Answer:
cation
Explanation:
I. Escribe el tipo de reacción al que pertenece cada una de las siguientes reacciones: a. P4(s) + 3 O2 (g) → 2 P2O3 (g) b. CaCO3 (s) → CaO (s) + CO2 (g) c. Cu (s) + AgNO3 (ac) → CuNO4 (ac) + Ag (s) d. Pb(NO3)2 (ac) + NaI (ac) → PbI2 (s) + 2 NaNO3 (ac) e. FeCl3 + 3 NH4(OH) → Fe(OH)3 + 3 NH4Cl f. N2 + 3 H2 → 2NH3 g. Zn + 2HCl → H2 + ZnCl2 h. 2HgO → 2Hg + O2 i. 2H2(g) + O2 → 2H2O(l) j. 2H2O(l) → 2H2(g) + O2(g) k. Mg(s) + Cu(NO3)2 (ac) → Mg(NO3)2 (ac) + Cu(s) l. 2Na + 2H2O – > 2NaOH + H2 m. H2O + CO2 – > H2CO3 n. 2KClO3 – > 2KCl + 3O2 o. NaCl + LiNO3 – > NaNO3 + LiCl
When Na2O is mixed with Mn(NO3)4 it forms NaNO3 and MnO2. We start with 25.0 g
of sodium oxide and 56.1 g of manganese (IV) nitrate.
How many grams of sodium nitrate can be produced?
2. Have you ever seen a natural event that surprised
you? Why was it surprising?
Answer:
I have seen many lightning storms before. However, one of the most surprising ones was when I was at my house. It was around midnight when I awoke from the sound of lightning in the distance. I was also half awake so this could be another reason this was the most surprising, but lightning struck near my area. i could see the light through my curtains and the sound was loud enough to awake everyone in my house, even the deep sleepers. I practically jumped out of bed.
When one evaporates a pure substance, what would be seen after this evaporation?
Answer:
3
I would like to understand the temperature at which a substance will vaporize when dissolved in a liquid. I have researched this online for hours, but haven't found a conclusive answer. Is it the boiling point of the dissolved substance? I'm attempting to find the temperature at which caffeine vaporizes when dissolved in water or other vegetable glycerin.
Explanation:
I hope this helps a little bit
Sulfur,Iodine,.Carbon,Hydrogen put these lowest to highest
Answer:
The order is Hydrogen, Carbon, Sulfur, Iodine
Explanation:
According to the periodic table. The order is Hydrogen, Carbon, Sulfur, Iodine. You can search up an image of a periodic table, it will help you.
does a single atom make a difference to the properties of matter?
Yes, all things are made of atoms, and all atoms are made of the same three basic particles - protons, neutrons, and electrons. But, all atoms are not the same. ... The difference in the number of protons and neutrons in atoms account for many of the different properties of elements.
Which properties describe the elements in group 18?
In order to form water, two hydrogen atoms and one oxygen atom must be
A. dissolved.
B. bonded.
C. divided.
D. mixed.
Answer:
B bonded
Explanation:
Two molecules of hydrogen gas (two hydrogens bonded together) are combined with one molecule of oxygen gas (two oxygen atoms bonded together) in order to form two molecules of water (two hydrogen atoms bonded to one oxygen atom). What are covalent bonds? Covalent bonds occur when two or more atoms share electrons.
In order to form water, two hydrogen atoms and one oxygen atom must be bonded. The correct option is B.
What are covalent bonds?Covalent bonds between two or more atoms occur when they share electrons. with each other.
Two molecules of hydrogen gas are combined with one molecule of oxygen gas which forms two molecules of water. Hydrogen take one electron and oxygen can donate two electrons. One oxygen shares two electron with two hydrogen with one electron gaining capacity.
Thus, in order to form water, two hydrogen atoms and one oxygen atom must be bonded. The correct option is B.
Learn more about covalent bond.
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If you try to place the compound on the pan over the flame, what could possibly happen? Explain your answer. [2 marks] anyone please help me!!:(
Answer:
it will probably flame up or explode or maybe start boiling
What drives the flow of energy in cycling of matter in the atmosphere
Chemistry help equations
Answer:
no reaction will occur .
Need done fast please! 41 points
Heat energy provided during phase change is used to:
increase kinetic energy
break intermolecular bonds
break intramolecular bond
decrease kinetic energy
Answer:
I'm not exactly sure but I think it's the first one if I'm wrong tell me so I know and I don't know how I can get points back but if I can figure it out I will tell me if I'm wrong
help me with this pleasee
whats on the right side ?
Answer:
B) Products
Explanation:
Answer:
B. products
Explanation:
PLEASE ANSWER MY QUESTION
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#1 Predict the electron and molecule geometry with 6 bonding domains and a single lone pair.
Bad answers will get reported. Correct answers get 50 points and brainliest!
Answer:
According to VSEPR theory the molecule with six binding domains and single lone pair will have the pentagonal bipyramidal geometry. As it is known that six binding domains means six bonds and a single lone pair means one pyramidal bond, so that it does not repel bonds to a higher extent. Hence, total of seven bonds are required which is provided by the pentagonal bipyramidal geometry. The number of electrons of the molecule will be fourteen 2 from each of the 6 binding domains that makes up to 12 and 2 from the lone pair.
Which statement best describes the polarity of the molecule Sil4?
Answer:
I dont a picture
Explanation:
but the answer is 24
A structure that contains a watery fluid which protects the embryo/fetus is 7 7 point
known as? *
chorion
amnion sac
uterus
cervix
Answer:
and unborn baby
Explanation:
an unborn baby
I just got confessed to
but i only like the person 89% out of 100...
what should I do ?
Answer:
:)haha
Explanation:
Answer:
:D
Explanation:
Why does an atom tend to fill its outer energy shell?
Explanation:
atoms will tend to completely fill their outer shells and will bond with other elements to accomplish this goal by sharing electrons, accepting electrons from another atom, or donating electrons to another atom.
1.0 mole of KCl(aq) is added to which solution to produce a precipitate?
A)
Lit
B)
Ca2+
Agt
D)
Zn2+
Answer:
Ag+
Explanation:
If you imagine as if the problem were double replacement, you would pair the Cl with one of the following ions provided in the choices. As seen on Table F, Ag+ paired with Cl- produces an insoluble compound, hence the precipitate. All the other ions shown in the multiple choice section, when paired with Cl- will produce a soluble compound, as a result NOT a precipitate.
Choose the correct option
Answer:
C
Explanation:
Hope this helps.
2) A student performed the titrations done in this experiment. The student pipetted 25mL of solution that contained saturated calcium hydroxide solution and 0.05 M calcium ions into a flask and then titrated it with 0.103 M HCl. It required 2.77mL of HCl to reach the orange-red end point. Calculate the molar solubility of calcium hydroxide in this solution.
Answer:
5.706x10⁻³M
Explanation:
Based on product solubility of Ca(OH)₂:
Ca(OH)₂(s) ⇆ Ca²⁺ + 2OH⁻(aq)
Ksp = 5.5x10⁻⁶ = [Ca²⁺] [OH⁻]²
Where [Ca²⁺] is 0.05M and [OH⁻] is obtained from the reaction with HCl.
The molar solubility, S, will be:
S = [OH⁻]/2
The [OH-] is:
Moles HCl = Moles OH⁻
2.77x10⁻³L * (0.103mol / L) = 2.85x10⁻⁴ moles OH⁻ in 25mL = 0.025L:
2.85x10⁻⁴ moles OH⁻ / 0.025L = 0.0114M = [OH⁻]
And S is:
0.0114M/2 =
5.706x10⁻³Mhelp 4 me???? ples????
Answer:
its the first one.
Explanation:
If sodium loses an electron, it now has 11 protons, 11 neutrons, and only 10 electrons, leaving it with an overall charge of +1