Answer:
Explanation:
There are two 250 mL aq solutions. The first solution is potassium chromate and the second is silver nitrate. The masses of the solute in each of the solutions are the same. After the reaction was completed, the precipitate was found to have a mass of 167 g. Calculate the concentration of potassium ions in the original potassium chromate solution.
K2CrO4 + AgNO3-----> Ag2CrO4 + KNO3
Ag2CrO4 HAS A MOLECULAR WEIGHT OF 2(108x2) + 52 + (4X16) =
216 + 52 + 64 =332
167gm/332= 0.51 moles which has 0.51 moles of CrO4 and required
2X0.51 moles K=1.02 moles of K
the original solution was 250 ml or 0.250L and had 1.02 moles/0.250L=
4.1 moles/L of K or 4.1 M of K
Please answer these 2 questions
Answer:
Question 8, I think is C describe CR. Question 7 is Chemical reactions produce new substances
Explanation:
What is the importance of water?
IMPORTANCE:
Water is very important. Whether it's from washing your dishes to hydrating, to simply just watering your flowers, water is important.
Washing Dishes
When you eat, after you eat, you wanna clean your dish. You're not gonna keep it dirty, you're going to have to wash it. Soap and water are often used when washing dishes. It's the best way to get it cleaned.
Hydration
Drinking water can have many benefits. It can make you more productive, you can even lose weight, no migraines, and it can boost your metabolism.
Watering Flowers
It's helpful to water plants because watering them on a basis/routine can help them gain nutrients. No watering the plant can result the plant drooping down and for it to become droopy and dry.
why do blue messel shell get thicker
up right
read the last 3 paragraph you will see the answer
what are the 4 quantum numbers for the last electron in promethium 
Answer:
Promethium atoms have 61 electrons and the electronic shell structure is [2, 8, 18, 23, 8, 2] with Atomic Term Symbol (Quantum Numbers) 6H5/2.
Find the volume of 5.74 grams of NO2 (Hint: use two factors)
Answer:
1.2 cm^3
Explanation:
5.74 grams of a something occupies a volume of 1.2 cm^3 .
I would be so grateful if someone helped me with my lab report. My lab report is about identifying unknown solids.
- How could I start my introduction?
Thank you and have a great day!!
Answer:
good afternoon
Explanation:
like that you dummy
Hydrogen gives off of energy when burned in oxygen, and methane gives off under the same circumstances. Of a mixture of g hydrogen and g methane is burned, and the heat released is transferred to g water at , what final temperature will be reached by the water
Answer:
The answer is 9
Explanation:
Because 5+4=9 lol
PLS HELP WILL GIVE BRAINLIEST!
Based on the diagram below, in what period is the atom located on the periodic table? *
a. period 4
b. period 2
c. period 6
d. period 1
Answer:
C. Period 6
Explanation:
the greater gravitational force
Answer:
The stronger the pull of gravity on an object ( the greater it's weight)
make a punnett square for these two parents AA × aa
Answer:
Aa
Explanation:
all of the punnet squares would be Aa because there is AA to aa
the chemical bond between elements of the two terminals of the periodic table is
Answer:
Covalent bonds are much more common in organic chemistry than ionic bonds. A covalent bond consists of the simultaneous attraction of two nuclei for one or more pairs of electrons. The electrons located between the two nuclei are bonding electrons.
...
which one goes where?
Answer:
precipitation goes to the left box
condensation goes to the bottom box
evaporation goes in the top right box
Explanation:
hope this is helpfull
can you relate to these pictures
what action is not necessary before lighting a bunsen burner?
Answer:
Even though you didn't include any option choices in your question, I've searched it up anyways, and every source I found says that the answer is "Leave the gas stop open for a few minutes before lighting to clear the line."
Explanation:
Hope this is what you were looking for :)
If not, then I'm sorry.
which term names the concentration of salts dissolved in a liquid?
Answer:
salinity
Explanation: guess
When a cold pack is put on your ankle what happens to the molecules in your ankle?
what is the type 1 binary compound for MgCl2
Answer:
Explanation:
magnesium chloride
The bonding of blank and blank does not involve the blank of electrons
Answer:
Huh? I guess it's
TRUE?Explanation:
Correct me if I'm wrongAnswer:
IT'S FALSE ISN'T IT? YEHHurry for A brainlist
Answer:
Option C .P=79, N= 118 Atomic number=79 Mass number=197
exist within a compound to hold the
atoms together within molecules
Answer:
9
Explanation:
I got it right on my last test
What is wrong with writing the electron configuration of a ground state atom as 1s2 2s2 2p6 3s2 3p6 3d10 4s2 ?
Answer:
Writing of the subshells
Explanation:
Given configuration:-
[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^63d^{10}4s^2[/tex]
Actual configuration:-
[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^{10}[/tex]
This is because 4s orbital is less in energy than that of 3d
Periodic table puzzles
Answer:
Explanation:
I can explain if you ask
when you take 10 grams of salt, and dissolve it in 25 grams of hot water what is the solubility
Answer:
When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. ... Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.
Explanation:
What happens to electronegativity as you go down the same group
on the Periodic Table?
Answer:
decreases
Explanation:
As you go down the same group on the periodic table, the electronegativity of an atom will decrease.
What is the molarity of 48.6 g of magnesium (Mg) ions in 4 L H2O? Show cancelation of units to get credit. PLEASE HELP!!!
Answer:
0.50M (1 sig. fig.)
Explanation:
The problem objective is 'Molarity (M)', so set up given data to reduce to moles per liter. That is ...
Molarity = moles Mg/Liters of solution = (48.6g/24.31g·mole⁻¹)/(4Liters) = 0.499794323M (calc. ans.) ≅ 0.5M (1 sig. fig.)
calculate the moles and Molecules presents in ammonia present in 5.6dm3
of its volume STP?
Answer: 0.25 moles NH3
1.51x10^23 molecules NH3
Explanation:
5.6dm3 (cubic decimeters)
1 dm^3 = 1 liter
We have 5.6L of ammonia (NH3 gas) at STP. All gases at STP occupy 22.4 liters/mole. Use this information as a conversion factor:
(22.4 L NH3)/(mole NH3)
Therefore:
(5.6L NH3)/(22.4 L NH3)/(mole NH3) = 0.25 moles NH3
Use Avogadro's number to convert moles to particles/molecules
(0.25 moles NH3)*(6.02x10^23 molecules/mole) = 1.51x10^23 molecules NH3
Which of these demonstrates one of Newton's Laws of Motion? A seat belt holds you in your seat kicking a bowling ball will affect you more than the ball a fireman is knocked backward when he turns on his hose all three are examples of Newton's Laws
Answer:
the last one: all three are examples of Newton's laws
Explanation:
i guess
My atomic mass is 35.453
A sample of an unknown gas occupies 5.51 L at 1.31 atm. What pressure would thisgas exert in a 0.520 L container if the temperature is held constant?
Answer:
P₂ = 13.9 atm (3 sig. figs.)
Explanation:
The pressure (P), Volume (V) relationship with Temperature (T) & mass (n) held constant is an inverse proportionality. That is Boyles Law ...
P ∝ 1/V => P = k/V => k = P·V
For two pressure-volume conditions, the proportionality constant (k) remains constant where k₁ = k₂ and P₁·V₁ = P₂·V₂ => P₂ = P₁·V₁/V₂
Given:
P₁ = 1.31 atm.
V₁ = 5.51 L
P₂ = ?
V₂ = 0.520 L
V₂ = (1.31 atm)(5.51L)/(0.520L) = 13.88096154 atm (calc. ans.) = 13.9 atm (3 sig. figs.)
Describe the appearance and properties of a gas.
Answer:
A gas is light, the molecules are moving very fast, and a gas can change forms due to temp of the area its in.
(NH4)4X what is the charge on X
