Given: 800 mL of 2.5 M NaCl. Find grams of NaCl needed
Answer:
Answer: molar mass of NaCl is 58.5 gm/mol. This refers to the fact that 1 mole of NaCl weighs 58.5 gram.
Explanation:
Sắp xếp 4 axit sau theo thứ tự tính axit tăng dần:
CH3-CH2-CH2-COOH (1), CH3-CH2-CHCl-COOH (2)
CH3-CHCl-CH2-COOH (3), CH2Cl-CH2-CH2-COOH (4
Use the choose reaction drop down menu to see other equations, and balance them. Check your answers and then write the balanced equations. AI+ HCI-> AICI3+ H2
NaCI -> Na + CI2
Na2S + HCI -> NaCI + H2S
what is a nucleus and what are the functions?
U ever get an answer
An initial solution of orange juice has a solute concentration of 0.50 M and a volume of 155.0 mL. What is the final solute concentration of the juice after its been diluted with 52.5mL of water?
Answer:
0.37 M
Explanation:
An initial solution of orange juice has a solute concentration of 0.50 M and a volume of 155.0 mL. What is the final solute concentration of the juice after its been diluted with 52.5mL of water?
the old molarity was 0.50 M, and a volume of 1555.0 ml
the new volume is a total of 155.0 ml + 52.5 ml =207.5 ml
so the new molarity is (155.0/207.5) X 0.50 M = 0.37 M
How many molecules of aspartame are present in 1.00 mg of aspartame?
Answer:
0.2 x 10^19
Explanation:
How do I calculate the pH of the solution given the following [H3O+] or [OH−] values?[OH−] = 4.0×10^−11 M?
pH= _______
What is the mole ratio between FeCl3 and Fe(C5H7O3)3 ?
Answer: 162.2 g FeCl3. mL of soln = 0.07028 mol FeCl3x ... mol FeCl3 = mol Fe(OH)3 = 0.01291 mol ... (a) MaVa = MbVb since HCl and KOH react in a 1:1 molar ratio.
Explanation:
What is the initial concentration of a solution if 40.0 mL is diluted to make 720 mL of a 0.45 M solution?
Answer:
8.1 M
Explanation:
What is the initial concentration of a solution if 40.0 mL is diluted to make 720 mL of a 0.45 M solution?
LET Y = INITIAL CONCENTRATION
SO
Y TIMES 40/720 = 0.45 m
SO
Y= (0.45) X 720/40=
0.45 X 72/4 =
0.45 X 18 =8.1 M
Concentration is related to the mass and volume. 8.1 M initial concentration of a solution is required if 40 ml is diluted to make 720 ml of a 0.45 M solution.
What is initial concentration ?The first measured concentration of a compound in a substance is called as initial concentration. Initial concentration also measure with the help of molarity.
Write out the equation C = m ÷ V, where m is the mass of the solute and V is the total volume of the solution. Substitute the values you found for the mass and volume, and divide them to find the concentration of your solution.
Let X is the initial concentration,
so, X times 40 ÷ 720 = 0.45
X = ( 0.45 ) × ( 720÷40)
= 0.45 × 18
= 8.1 M
Hence, 8.1 M initial concentration of a solution is required .
To learn more about initial concentration follow the link below;
https://brainly.com/question/23546015
#SPJ2
Lattice energy is_______________ proportional to the distance between two ions in an ionic compound; therefore, the compound with the smaller lattice energy will have the _________________ distance between the ions.
Lattice energy is inversely proportional to the distance between two ions in an ionic compound; therefore, the compound with the smaller lattice energy will have the larger distance between the ions.
Discussion;
The lattice energy of an ionic compound is a measure of the strength of the bond in the compound.The lattice energy is Inversely proportional to the distance of the atoms apart.Read more:
https://brainly.com/question/24228788
Help solve this please?
Answer:
Q1. a.KI
b.MgCl2
c.Na2S
d.Al2S3
e. AlN
Explanation:
a. silver chloride
b. zinc oxide
c. Calcium bromide
d. strontium fluoride
e. Barium oxide
f. Calcium chloride
The student burns 10 g of magnesium in air to produce magnesium oxide (MgO).
2Mg + 0 + 2MgO
Calculate the maximum mass of magnesium oxide that could be produced in the reaction.
Answer:
x=403/24,3 = 16.58 gm MgO
EXPLANATION
The student burns 10 g of magnesium in air to produce magnesium oxide (MgO)
2Mg + 0 + 2MgO
Calculate the maximum mass of magnesium oxide that could be produced in the reaction.
Oxygen exist in nature as O2, diatomic.
so
The student burns 10 g of magnesium in air to produce magnesium oxide (MgO).
2Mg + 02 + 2MgO
Calculate the maximum mass of magnesium oxide that could be produced in the reaction.
2 moles of Mg produce 2 moles of MgO
1 mole of Mg weighs 24.3 and produces 1 mole of MgO
Mg HAS AN ATOMIC MASS OF 24.3
Mg HAS A MOLAR MASS OF 24.3 +16 = 40.3gm/mole
so 24.3 gm of Mg produce 40.3 gm MgO
set up the ratio
10 gm Mg/x of MgO = 24.3/40.3
or
10/x = 24.3/40.3
cross multiply and isolate x (use Algebra I)
24.3x =403
x=403/24,3 = 16.58 gm MgO
3. What is the momentum of a 120 kg dolphin swimming at a velocity of 15 2 points
m/s E? *
135 kg*m/s
8 kg*m/s
1800 kg*m/s
105 kg*m/s
Answer:
1800 kg*m/s
Explanation:
mass x velocity
120 x 15
convert 3.49g/cm³ to kg/m³
1 g/cm3 to kg/m3 = 1000 kg/m3
3.49 g/cm³= 3.49 x 1000
= 3490 kg/m³
Ans: 3490 kg/m³
How many peaks will you observe in the 13C spectrum of cyclohexane ?
1 1 - incorrect
3
6
3 peaks
Explanation:
You can do this perfectly well without referring to chemical shift tables at all. In the spectrum there are a total of three peaks - that means that there are only three different environments for the carbons, despite there being four carbon atoms.
pls help i am in 8th grade k12
Answer:
zzxdczxc V
Explanation:
what do you call organism that are composed of many cells?
Answer:
Multi-cellular
Explanation:
giving brainly for correct answer! :)
Answer:
Mass is the amount of matter in an object
Answer:
Mass
Explanation:
matter is weighed by the mass of an object
When the pressure of a sample of gas is measured in a closed-end manometer, the mercury liquid is measured at a height of 31.6 cm. What is the pressure of the gas, in Pa
The answer is 42,100.
Calculate the amount, in moles, of 2.5 L of a 5.0 M sulfuric acid, H2SO4.
Answer:
12.5 moles H2SO4
Explanation:
Calculate the amount, in moles, of 2.5 L of a 5.0 M sulfuric acid, H2SO4.
5.0 M means 5 moles per liter.
so in 2.5 L we have
5.0 X 2.25 = 12.5 moles H2SO4
An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which
statement describes the most likely result?
O The energy absorbed in the first move equals the energy released in the second move.
O The energy absorbed in the first move is greater than the energy released in the second move.
O The energy released in the first move equals the energy absorbed in the second move.
O The energy released in the first move is greater than the energy absorbed in the second move,
Answer:
The energy absorbed in the first move is greater than the energy released in the second move.
Explanation:
When the electron goes up levels it absorbs energy to enter that higher energy state. When it goes down, it releases energy but just not as much because 1-4 is more than 4-2.
describe why paleontologists excavate fossils slowly and carefully
Answer:
Due to it breaking
Explanation:
Fossils are about millions of years old and and they can be broken easily.
Pedro’s teacher wrote the formula for glucose, a common sugar, on the board. Pedro learned that the letters in the formula represent the elements that are in a glucose molecule and that the small subscript numbers in the formula ________ how many atoms of each element are present in a molecule of glucose. By looking at the formula, Pedro determined that each molecule of glucose is made up of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
Pedro’s teacher wrote the formula for glucose, a common sugar, on the board. Pedro learned that the letters in the formula represent the elements that are in a glucose molecule and that the small subscript numbers in the formula ________ how many atoms of each element are present in a molecule of glucose. By looking at the formula, Pedro determined that each molecule of glucose is made up of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
A) repeat. B) permi.t C) transfer, D) indicate
Answer:
D.
Explanation:
Im not quite sure if its correct or not
The formation of aluminum chloride can be described by the balanced chemical equation. 2Al+3Cl2⟶2AlCl3 How many moles of Cl2 molecules are required to react with 3.90 mol Al atoms? moles of Cl2 required
nkkljihghjhytuyftghvnvm
jkhjkhjkh
Answer:
seriously ....,........
I don't like chemistry
When performing an experiment, the following footwear is best
Answer:
sneakers
Explanation:
Answer:
closed toe shoe
Explanation:
becusae if a cemcal spills it cant hurt your feet
Fine rice and wheat are homogeneous or heterogeneous
Answer:Heterogeneous
Explanation:they can be separated by using the method of winnowing
Fission is the of a heavy nucleus into two smaller nuclei. This process is used in __________ .
Nuclear Fission
Nuclear fission, subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass. The process is accompanied by the release of a large amount of energy. In nuclear fission the nucleus of an atom breaks up into two lighter nuclei.
Nuclear fission is a process where the nucleus of an atom is split into two or more smaller nuclei, known as fission products. The fission of heavy elements is an exothermic reaction, and huge amounts of energy are released in the process.
Select all the correct answers.
To formulate hypotheses and construct theories, astronomers analyze data. This analysis helps them find trends that may exist. Which two statements does the data in this table support? If you’re not sure, take a guess.
A. The farther a planet is from the Sun, the longer its orbital period is.
B. Planets with a greater diameter have longer days.
C. The closer a planet is to the Sun, the greater its axial tilt is.
D. Planets with greater mass tend to have more moons.
Answer: A. The farther a planet is from the Sun, the longer its orbital period is, and D. Planets with greater mass tend to have more moons.
Explanation: trust
