Word equation
Magnesium + Oxygen = Magnesium oxide
Symbolic equation
Mg + O2 = MgO
Balanced symbolic equation
2Mg + O2 = 2MgO
How many atoms for each element in this compound:
Pb3(PO4)2
Pb =
P=
O=
Answer:
In the compound Pb3(PO4)2, there are 3 Pb atoms, 2 P atoms, and 8 O atoms.
Let me know if this helps!
There are 3 atoms of pb(Lead), 2 atoms of P(Phosphorus) and 8 atoms of O(Oxygen) are present in Pb3(PO4)2.
What is an atoms?An atom is the smallest constituents of matter that can neither be created nor be destroyed.An atom It consists of a central nucleus, usually surrounded by electrons. Each electron is negatively charged. The nucleus is positively charged, and contains relatively heavy particles known as protons and neutrons.What are Compounds?
A compound is a combination of atoms of same or different types of an element in a fixed ratio.
In the given question Pb3(PO4)2 is a compound of lead phosphate which is made up of 3 atoms of pb(Lead), 2 atoms of P(Phosphorus) and 8 atoms of O(Oxygen).
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Write the word and balanced chemical equations for the reaction between:
Sulfuric acid + aluminum hydroxide
Answer:
Alumminum hydroxide reacts with sulfuric acid as follows: 2Al(OH)3+H2SO4-->Al2(SO4)+6H2O.
Explanation:
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Fe2O3 the valance number
Answer:
3
Explanation:
Answer:
Valence of Fe-3
Valence of O-2
А
What is the chemical symbol for Hydrogen?
A.OCH
B.оне
C.Н
D.он20
Answer:
the answer to this is ( H )
How many atoms are in 1.00 moles of glucose
Answer:
1 molecule of glucose contains 6 atoms
Explanation:
Answer:
there are 6 atoms :)) I think so
Why is there a border between light and dark on the moon
Answer:
because the sun illuminates the half of the moon that's facing it leaving the other half dark
Write the chemical formula for each:
ammonium nitrate
iron(II) sulfide
magnesium hydroxide
titanium(II) chloride
cobalt(III) oxide
potassium sulfide
barium acetate
magnesium bromide
lithium carbonate
potassium permanganate
Answer:
Ammonium nitrate is NH4NO3
iron(II) sulfate is FeSO4
magnesium hydroxide is MG(OH)2
titanium(II) chloride is TiCI2
cobalt(III) oxide is Co2O3
potassium sulfide is K2S
Barium acetate is C4H6BaO4
magnesium bromide is MgBr2
lithium carbonate is Li2CO3
potassium permanganate is KMnO4
Sound travels faster through solids than it does through either liquids or gases a student could verify this statement by
Group of answer choices.
A. Distance that sound travels through a solid, a liquid, and a gas.
B. Pitch of sound when it passes through a solid, a liquid, and a gas.
C. Distance sound travels through a solid, a liquid, and a gas at varying temperatures.
D. Time required for sound to travel a set distance through a solid, a liquid, and a gas.
Answer:
D. Time required for sound to travel a set distance through a solid, a liquid, and a gas.
Explanation:
Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.
Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.
Mathematically, the time required for sound to travel is given by this formula;
[tex] Time = \frac {distance (x)}{speed (v)} [/tex]
Hence, the time taken for sound to travel through each medium (solid, liquid and gas) would be measured, recorded and compared to one another.
1.2 moles of oxygen represents how many atoms of oxygen
Answer:
2 × (6.022 × 10 23) Na atoms, or 1.2044 × 10 24 Na atoms.
Explanation:
One mole of oxygen contains 6.02 × 10²³ oxygen atoms or formula units. Hence, moles of contains 7.22 × 10²³ .
What is one mole ?One mole of a substance is its amount containing 6.02 × 10²³ atoms or molecules. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Similarly one mole of every compound contains 6.02 × 10²³ molecules. The mass of one mole of compound is called its molar mass.
Oxygen is 16th element in periodic table. One mole of oxygen contains 6.02 × 10²³ oxygen atoms . Hence number of atoms of 1.52 moles is:
1.2 × 6.02 × 10²³ = 7.22× 10²³ .
Hence, there will be 7.22 × 10²⁴ oxygen atoms in 1.2 moles.
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1. What type of chemical reaction is the following equation?
AIBr3 +K → KBr + AI
Answer:
Explanation:
It is called a single replacement. K is one of the few chemicals that can force Aluminum to take on electrons. The balanced equation is
AIBr3 +3K → 3KBr + AI
Answer: Single Displacement (Substitution)
Explanation:
Aluminum Bromide + Potassium = Potassium Bromide + Aluminum
Question: If red dye is added to cold water and blue dye is added to warm water, which dye will
spread out quicker?
Answer:
Blue dye spreads out quicker
Explanation:
This is because the dye gets spread out by water molecules. Warm water has faster moving water molecules than cold water.
I would appreciate help on writing an equalibrium constant expression.
Explanation:
it would be
[tex]kc = (products) \div (reactants) \\ kc = \frac{nh3)^{2} \times (co2) \times (h2o)}{(nh4)^{2}co3 }[/tex]
this the expression however when you are working out Kc do not include nh4^2co3 as it is a solid and it's concentration remains constant so remember to remove the nh4^2co3 and usage would just have the top part to work out ok
A reaction occurs that results in more products than reactants. What type of reaction is
'this?
Answer:
Endothermic reaction
Explanation:
Endothermic means that energy is absorbed leading to more product.
The reaction in which the products can return back to reactants is called reversible reaction. The reaction where more products are formed is called endothermic reaction where the products are more stable.
What is endothermic reaction?An endothermic reaction is a reaction where, the reactants absorbs heat energy and to produce new products. The term for heat absorption is called endothermic. Whereas the reaction in which heat is evolved is called an exothermic reaction.
In endothermic reaction, reactants gains thermal energy to overcome the energy barrier for the reaction. Therefore the activation energy for products will also be lower indicates their stability.
The enthalpy change that the change in heat absorbed for the endothermic reaction will be positive that is ΔHrxn is +ve. Endothermic phase change involves an increase in entropy. Hence, the reaction that result in more products than reactants is endothermic.
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hear me out!! am I the only one who gets headaches on the daily? why do I get them?
Answer:
Same i have headaches daily, maybe from infections such as meningitis or Intracranial pressure that's either too high or too low or id.k.
Which of the following has the highest in chemical energy (energy stored in chemical bonds)?
Question 2 options:
ADP
ATP
ASP
APP
Answer:
ADP
Explanation:
The process by which oxygen reacts with iron minerals in rock to form rust is called
Explanation:
your answer is oxidation
Answer:
Oxidation
Explanation:
which is the SI unit used to measure the temperature of a substance
Answer:
Kelvin
Explanation:
Answer:
Kelvin
Explanation:
which of these elements has the smallest atomic radius?
a) F
b) Cl
c) Br
d) i
Answer:
F has the smallest
Explanation:
The trend is that atomic radius increases as you move down a group
Hello, your answer is down below!
A. F
I hope this helps mark brainlist if im correct!
Above is a solubility curve for KNO3.
Solubility has nothing to do with the speed of dissolving; it's a measure of how much salt will dissolve at a given temperature.
The y-axis of the graph shows you how much KNO3 will dissolve in 100 g of water. In other words, it tells you the maximum amount of solute that will dissolve at different temperatures.
The x-axis tells you the minimum temperature needed to dissolve different amounts of KNO3 in 100 g of water.
Approximately how many grams of KNO3 will dissolve in 100 g water at 0 degrees Celsius?
Type in the number only; no units. Round your answer to the nearest whole number.
WILL MARK BRAINLIEST!!!
About 9.8 g of potassium nitrate will dissolve in about 100 g of water at 0 degrees Celsius.
What is solubility curve?The term solubility curve refers to a plot of the concentration of a substance in solution against temperature. We can easily read off the amount of substance that has dissolved in solution using the solubility curve.
Looking at the solubility curve as shown, we can see that about 9.8 g of potassium nitrate will dissolve in about 100 g of water at 0 degrees Celsius.
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CH3CH2C=CH2)
O=O
?
What is the functional group for this compound
Answer:
ketone
Explanation:
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is phosphorus a pure substance or mixture
Answer: it is Not a pure substance because it consists of sodium so it would be a mixture because it contains sodium
Explanation:
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its mixture
Explanation:
phosphorus atoms has 15 electrons and 15 protons with valence 5 electron in outer shell and is highly reactive element
Approximately what is the minimum temperature needed to dissolve 10 g of KNO3 in 100 g H2O?
Round your answer to the nearest whole number and type in the number only; no units.
Answer:(a) Potassium nitrate will begin to crystallise at about 56 °C, when its solubility is 100 g/100g water.
Explanation:
what properties of aluminum make it particularly useful in drinking cars
Answer:
in doesn't rust which sends meatel into the drink
Explanation:
u are welcome
Which of the following electromagnetic waves has the shortest wavelength
Gamma rays have the shortest wavelength
Which is a TRUE statement about
London Dispersion Forces?
ELECTRON moving causes partial
positive & negative charges creating
attraction
PROTON movement causes partial
positive & negative charges creating
attraction
Answer:
The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. Dispersion forces are present between any two molecules (even polar molecules) when they are almost touching.
Thus PROTON movement causes partial positive & negative charges creating
attraction will be crrt
Which of the following best represents and explains the formula for a compound made from nitrogen and hydrogen?
Answer:NH4, because nitrogen needs four electrons, and each hydrogen needs one electron.
Explanation:
Which object would have a greater velocity change?
Answer:
The object with less mass will have a greater change in velocity
Explanation:
Answer:
the one with the smaller object mass becaise you get more force upon impact with less effort to move
how much faster will ammonia vapor travel across a room then carbon dioxide
a. 0.622
b. 1.39
c. 7.55
d. 1.61
Answer:
D) 1.61 times faster
Explanation:
[tex]vrms_{NH3}[/tex] = √(3)RTM
R constant= 0.08206
T=constant, so in this problem we dont need a value for it
M=17.031 g/mol
√(3)(0.08206)(17.031)= 2.047
[tex]vrms_{CO2}[/tex] = √(3)RTM
R constant= 0.08206
T=constant, so in this problem we dont need a value for it
M= 44.01 g/mol
√(3)(0.08206)(44.01)= 3.29
Since we are trying to measure how much faster NH3 will be, we have to realize that mass and speed have an inverse relationship.
So instead of doing (2.047)/(3.29) = 6.22
we have to flip the values to get (3.29)/(2.047)= 1.61
How will you prepare hydrogen from zinc and dilute acid.
How is ethanol different from carbon dioxide?
A: Ethanol is made of oxygen.
B: Ethanol is made of hydrogen.
C: Carbon dioxide only has two atoms.
D: Carbon dioxide only has one atom.
Answer:
B
Explanation:
Ethanol is C2H6O. Carbon diozidex is CO2. Ethanol has hydgrogen, where carbon dioxide does not.