Answer:
hydrogen
Explanation:
i took chemistry last year a d passed
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.
What is the mass of 99.0 L of NO2 at STP?
Mass of NO₂= 203.32 g
Further explanationGiven
99.0 L of NO₂
Required
Mass of NO₂
Solution
Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.
So mol NO₂ :
= 99 : 22.4
= 4.42
Mass :
= mol x MW
= 4.42 x 46 g/mol
= 203.32 g
Calculate the molarity of a solution prepared by dissolving 3.80 grams of AgNO3 in enough water to make 3.50 liters of solution. (If possible show process)
Answer:
By the end of this section, you will be able to:
Describe the fundamental properties of solutions
Calculate solution concentrations using molarity
Perform dilution calculations using the dilution equation
2. How many grams of methane must be burned to produce 2.05 grams of water in the complete combustion reaction?
The unbalanced equation for the reaction is: _CH418) + _ 0218) ►_CO2(8) +_ H2O(8)
Answer:
0.88 g
Explanation:
The balanced reaction equation is;
CH4(g) + 2O2(g) ----------> CO2(g) + 2H2O(l)
Number of moles in 2.05g of water = 2.05g/18g/mol = 0.11 moles
If 1 mole of CH4 yields 2 moles of water
x moles of CH4 yields 0.11 moles of water
2x = 0.11
x = 0.11/2
x= 0.055 moles
Molar mass of methane = 16 g/mol
Mass of methane = 16 g/mol * 0.055 moles
Mass of methane =0.88 g
Which of the following is NOT an example of a change of state? *
HELP PLSSSSSS
Plants using photosynthesis to produce food.
Liquid water in perspiration changes to a gas when it evaporates.
An ice cream cone melts, forming a liquid.
Answer:
Plants using photosynthesis to produce food.
Answer:
the icecream one is not an example
How many Proton, Neutrons, and
Electron does 35^Cl have?
Answer:
17 electrons, 17 protons and 18 neutrons
Explanation:
35-Chlorine has 17 Protons, and 18 Neutrons in its Nucleus.
in the single replacement reaction AB + C → A + CB, the anion in the reactant compound AB is _______
Answer:
The anion is B.
Explanation:
Compounds are usually written as [cation][anion], and the positive charge of the cation (A) will cancel out the negative charge of the anion (B). We are reaffirmed of our answer by the product CB, which also has B as an anion.
Answer:
B
Explanation:
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:
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.
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!
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 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
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
What is the molar mass of CO
Question:
→What is the molar mass of CO
Answer:
→28.01 g/mol
А
What is the chemical symbol for Hydrogen?
A.OCH
B.оне
C.Н
D.он20
Answer:
the answer to this is ( H )
Increasing the temperature of the water will increase the amount of salt that it can dissolve.
True
False
answer:
true, increasing the temperature does increase the amount of salt it can dissolve. however that would also be considered oversaturated if there is too much salt.
which is the SI unit used to measure the temperature of a substance
Answer:
Kelvin
Explanation:
Answer:
Kelvin
Explanation:
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:
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).
Learn more about atoms here: http://brainly.com/question/6258301
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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
Which of the following conditions must be met for a volume ratio to be created from a balanced chemical equation? (3 pm
O Changing temperature and pressure
Constant temperature and pressure
Changing temperature and constant pressure
Constant temperature and changing pressure
Answer:
The answer will be Constant temperature and pressure
Explanation:
Just took the test and it was correct 100%!!!
Answer:
Constant temperature and pressure
Explanation:
took the test
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.
To find more on endothermic reactions, refer here:
https://brainly.com/question/23184814
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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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Which has a lower electronegativity and why? N or P? Use 'force of attraction' in your answer
Answer:
The electron sets divided among two particles are not really shared similarly. For instance, while the common electron sets are shared similarly in the covalent security in Cl2, in NaCl the 3s electron is taken from the Na iota and is fused into the electronic design of the Cl molecule - and the compound is most precisely portrayed as comprising of individual Na+ and Cl− particles (ionic holding). For most covalent substances, their bond character falls between these two limits. We showed beneath, the bond extremity is a helpful idea for portraying the sharing of electrons between molecules inside a covalent bond:
A nonpolar covalent bond is one in which the electrons are shared similarly between two particles.
A polar covalent bond is one in which one iota has a more noteworthy fascination for the electrons than the other molecule. On the off chance that this overall fascination is sufficiently incredible, the bond is an ionic bond.
Explanation:
CH3CH2C=CH2)
O=O
?
What is the functional group for this compound
Answer:
ketone
Explanation:
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YOU DO:
1) What volume of 0.25M lithium fluoride solution can be made by dissolving 5.0 g lithium fluoride, LiF?
Answer:
0.7712 L
Explanation:
Molarity = 0.25M
Volume = ?
Mass = 5.0 g
The relationship between these quantities is given as;
Molarity = Number of moles / Volume
Volume = Number of moles / Molarity
Number of moles = Mass / Molar mass
Molar mass of LiF = 25.939 g/mol
Number of moles = 5 / 25.939 = 0.1928 mol
Volume = 0.1928 / 0.25 = 0.7712 L
Fe2O3 the valance number
Answer:
3
Explanation:
Answer:
Valence of Fe-3
Valence of O-2
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
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
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