Answer:
true
Explanation:
Answer:
b. trueeeeeeeeeeeeeeeeeeeeeeeeeeee
2. Calculate the mass of Kool-Aid needed to make 0.1 L solutions at the following concentrations: a. 0.1 M b. 0.2 M c. 0.3 M d. 0.4 M e. 0.5 M
click on the picture of the flowers until their colors correspond to the punnett square above. HELP PLZ!
Answer:
You will need to have a red flower in the top left, a pink flower in the top right and bottom left, and a white flower in the bottom right.
Explanation:
This flower appears to express color through codominance, which means that both genes express themselves. "R" is the dominant gene for red, and "r" is the recessive gene for white. When a flower has RR genotype, the phenotype will be a red flower. When a flower has an Rr genotype, the red and white genes will both be expressed and the phenotype will be pink. When a flower has an rr genotype, it lacks the red gene and will therefore be only white.
A case of paper has a mass of 2000 g. A case of paper contains 10 reams of paper. One ream of paper is 500 sheets. What is the mass, in grams, of 50 sheets of paper?
Answer:
s8sooooosoossososososkdk
Please help!
Check the element pairings that are likely to react with each other. Refer to the periodic table for assistance
1. Li and Be
2. Rb and Br
3. Fr and Cl
4. Rb and Ca
5. Li and Cl
6. F and Ne
Answer:
Lithium and Beryllium
Rubidium and Bromine
Francium and Chromium
Rubidium and Calcium
Lithium and Chlorine
Fluorine and Neo
Answer:
Rb and Br
Fr and Cl
Li and Cl
Explanation:
5. Para la siguiente reacción: KClO3 (s) KCl(s) + O2
Si se descomponen 500 gramos de una muestra impura de clorato de potasio y se recogen 100 litros de O2 medidos bajo condiciones normales de presión y temperatura. Determine la pureza de la muestra.
Answer:
72.95%
Explanation:
Para resolver esta pregunta, debemos hallar las moles tóricas que se producirían en la reacción asumiendo que los 500g son únicamente de clorato de potasio haciendo uso de la reacción balanceada:
2KClO₃(s) → 2KCl(s) + 3O₂(g)
Donde dos moles de clorato de potasio producen tres moles de oxígeno.
Después de hallar las moles teóricas de oxígeno debemos hallar las moles producidas usando PV = nRT. La pureza SERÁ:
Moles producidas / moles Teóricas * 100
Moles clorato -Masa molar: 122.55g/mol-:
500g KClO₃ * (1mol / 122.55g) = 4.08 moles KClO₃
Moles O₂ teóricas:
4.08 moles KClO₃ * (3 moles O₂ / 2 moles KClO₃) = 6.12 moles
Moles producidas:
PV / RT = n
Donde P = 1atm a STP
V es volumen = 100L
R es constante de los gases = 0.082atmL/molK
T =273.15K a STP
Reemplazando:
1atm*100L / 0.082atmL/molK*273.15K = 4.46 moles
La pureza de la muestra es:
4.46 moles / 6.12 moles * 100 = 72.95%
What is the total number of grams of solute in 500 milliliters of 1M CH3COOH (formula mass = 60)?
Answer:
30 grams
Explanation:
Molarity of a solution represents its molar concentration, and can be calculated by using the formula as follows:
Molarity (M) = number of moles (n) ÷ volume (V)
Based on the information provided, volume of solution = 500 milliliters, molarity = 1M
Volume of solution in liters = 500mL ÷ 1000 = 0.50L
Molarity = n/V
1 = n/0.50
n = 0.50moles
Using mole = mass/molar mass
Molar mass of CH3COOH (acetic acid) = 60g/mol
Mass = mole × molar mass
mass = 0.50 × 60
mass = 30 grams.
How does the ocean affect coastal climate?
O A. The specific heat keeps the ocean temperatures more even.
B. The specific heat capacity makes the coast colder in winter.
C. The specific heat keeps the coast region warm year-round.
O D. The specific heat keeps warm air constantly blowing inland.
Lo
Answer:
A. The specific heat keeps the ocean temperatures more even.
Explanation:
I just took a test on a p e x and it was correct! :)
Which is true regarding the density of air?
Consider the following reaction occurring in a 1.0 L container:
H2 (g) + I2 (g) → 2 HI (g)
State 2 requirements for a successful collision between H2 and I2.
Answer:
jjjjajwhejwhswjiwiwvssvwvow9qiwgdvdbslw
Pl help it’s for a grade
Answer: B. Potential energy
Explanation:
There are several form of potential energy including gravitational, magnetic, electrical, chemical and eleastic potential
Answer:
Potential Energy
Explanation:
Potential energy is stored energy and the energy of position.
Chemical, Gravitational, and Elastic are all stored energy and the energy of position.
Hope this helps!
:D
How many grams of water should be added to 4.00 g NaOH to create 2.00% by mass NaOH solution?
Answer:
196 grams
because ^^^ was wrong and person in comments said it was 196 and it was right
When NaOH of 4.00 g is being added with water, the mass of water required to create 2.00% of NaOH solution by mass is 196 g.
What is mass percent of solute?It means that the particular amount of solute in terms of percentage is present in the solute.
Given the mass of the solute, NaOH is 4.00g
Suppose the mass of water required to add is x in g.
The mass percent of the solute is
[tex]\dfrac{2}{100} =\dfrac{4.00}{4.00 +x }[/tex]
x =196 g
Therefore, mass of water required to create 2.00% of NaOH solution by mass is 196 g.
Learn more about Mass percent of solute.
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#SPJ2
weeks and how much money, in dollars, Jamal deposits into the savings account.
Week
Deposit (dollars)
0
10
1
15
2
20
3
25
4
30
Let f ()represent the amount of money Jamal deposits into his savings account at the end of 2 weeks. Based on the table,
what is f(10)?
E
A
50
0
С
D
60
B
10
2.
3
4
5
6
7
8
9
10 11
Next
Activat
Go to Setto
1002A
3/19/20
CH
O
BH
Type here to search
An
196 becase we all rice
Explanation:
Please help me with this homework
Need help ASAP DUE IN LIKE 2 minutes!!!!!!! Points are added
Proton:
Positive
Found in Nucleus
Mass of 1 AMU
Neutron:
Neutral
Found in Nucleus
Mass of 1 AMU
Electron:
Negative
Found in orbitals
Mass of 0 AMU
Please mark Brainliest if this helped you! :)
Р
+
02
=
P4O6
balance the equation
To balance a chemical equation, both sides should have equal mass, or in other words both sides should have same number of atoms as to follow the conservation of mass rule.
P + O₂ = P₄O₆
LHS:
Number of Phosphorus atoms = 1 atom
Number of Oxygen atoms = 2 atoms
RHS:
Number of Phosphorous atoms = 4 atoms
Number of Oxygen atoms = 6 atoms
Also since P₄O₆ has the most number of atoms we will make the LHS equalize to P₄O₆.
Difference between Phosphorous atoms in LHS to RHS = 3
Since phosphorous is a monatomic we need 3 phosphorous atoms extra
Difference between Oxygen atoms is LHS to RHS = 4
But Oxygen is diatomic, so we need 4/2 = 2 Oxygen molecules
Now lets see if it is balanced
P + 3P + O₂ + 2O₂ -------> P₄O₆
4P + 3O₂ ------> P₄O₆
LHS:
Phosphorous atoms = 4 atoms
Oxygen atoms = 3 × 2 = 6 atoms
RHS:
Phosphorous atoms = 4 atoms
Oxygen atoms = 6 atoms
LHS = RHS
Therefore the balanced equation is 4P + 3O₂ = P₄O₆
Happy to help :)
If you need more explanation or help in any other question, feel free to ask
4.How element gold is different from oxygen?
Answer:
Gold is a metal, more specifically a transition metal, whereas Oxygen is a nonmetal, more specifically a reactive nonmetal. Using this information, you can compare and contrast metals, nonmetals, and metalloids.
Metals are:
Shiny
High melting point
Mostly silver or gray in color
Mostly solids at room temperature – Mercury (Hg) is a liquid at room temperature
Malleable – able to be hammered into a thin sheet
Ductile – able to be drawn/pulled into a wire
Good conductors of heat and electricity
Nonmetals are:
Dull
Low melting point
Brittle – break easily
Not malleable
Not ductile
Poor conductors of heat and electricity
Metalloids are:
Found on the “zig-zag” line on the Periodic Table of Elements
Have properties of both metals and nonmetals
Can be shiny or dull
Semiconductors – able to conduct electricity under certain conditions
Explanation:
Reccomend this site for questions llike these: https://ptable.com/#Properties
HELP PLEASE ASAP!!! ASAP!
Answer:
canals and irrigation is the answer
Given the following balanced equation:
2KCIO3 --> 2KCI + 302
How many grams of potassium chloride are produced when 45.Og of potassium
chlorate are decomposed?
0 27.4
0.04
0 2.74
O 0.4
Answer:
0.04
Explanation:
Temperature is a measurement of :
1) total energy in a system
2) the average kinetic energy of a system
3) the average potential energy of a system
4) the ability to do work
Answer:
Temperature is a measure of the average kinetic energy of the particles in an object. When temperature increases, the motion of these particles also increases. (That should give you the answer if you read closely first sentence)
The change in water from the solid ice to a liquid is an example of a
Answer:
When solid ice gains heat, it changes state from solid ice to liquid water in a process called melting. Ice cubes in a cold drink, for example, gradually melt. This process is called evaporation. Water vapor (steam) mixes with the air and seems to disappear.
Answer:
melting
when solid ice gains heat, it changes state from solid ice to liquid water in a process called melting
this is correct answer
I hope it's helpful for u ...
i need help with d and e
Answer:
D: False
E: Ethane
Explanation:
Which characteristic of a planet describes whether the planet has a thick or thin layer of gas?
Atmosphere
Moons
Rings
Surface composition
Answer:
Atmoshphere!
Explanation:
I took the test and got a 100%! :) Hope this helps, plz mark brainliest!
Can someone please help me with this
Many animals influence and contribute to ecosystem services. As pollinators, how do butterflies ultimately contribute to direct ecosystem services?
Answer:
yEs
Explanation:
What is the name of the polyatomic ion with the molecular formula
SO32-
Answer:
sulfite ion SO32
Explanation:
A molecular ion is a covalently bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero.
1 and 2 answer choice help please?
Answer:
I think its b be ause it looks like a better answer and it has some detail to it
help please don’t understand
hello sister the answer is very easy it is 2 miles of oxygen
What mass of NaHCO3 is needed to produce 2.659 mol of CO2?
The mass of NaHCO₃ needed to produce 2.659 moles of CO₂ is 446.712 g
We'll begin by writing the balanced equation for the reaction. This can be obtained as follow:
2NaHCO₃ —> Na₂CO₃ + CO₂ + H₂O
Molar mass of NaHCO₃ = 23 + 1 + 12 + (16×3)
= 84 g/mol
Mass of NaHCO₃ from the balanced equation = 2 × 84 = 168 g
From the balanced equation above,
168 g of NaHCO₃ decomposed to produce 1 mole of CO₂.
With the above information, we can obtain the mass of NaHCO₃ needed to produce 2.659 moles of CO₂. This can be obtained as follow:
From the balanced equation above,
168 g of NaHCO₃ decomposed to produce 1 mole of CO₂.
Therefore,
Xg of NaHCO₃ will decompose to produce 2.659 moles of CO₂ i.e
Xg of NaHCO₃ = 168 × 2.659
Xg of NaHCO₃ = 446.712 g
Thus, 446.712 g of NaHCO₃ is needed to produce 2.659 moles of CO₂.
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When u place an iron nail in basin of water and leave it for two days what is formed in the iron nail
Answer:
When you place an iron nail in a basin of water and leave it for two days, what will happen to the iron nail? It will form rust on the surface of the nail. Rust forms when iron combines with oxygen to form iron oxide.
Explanation:
Assuming they were clean of rust to begin with, and are made of an ordinary steel - they start to rust - will turn orange, and the orange sediment...
Not much if any while it's in the water for that period of time. However once you remove it then it will be exposed two oxygen and will start to ox...
If it is not coated properly It will form Rust .
If some methane gas at 115 kPa and 33C is allowed to expand to 15.0dm^3 from 8.00 dm^3 when the temperature changed to 51.2 C. What pressure will the same amount of gas exert?
Answer:
228.4 kPa
Explanation:
From thw question,
PV/T = P'V'/T'..................... Equation 1
Where P = Inital pressure, T = Initial Temperature, V = Initial Volume, P' = fInal Pressure, V' = Final volume, T' = Final Temperature.
Make P' the subject of the equation
P' = PVT'/TV'...................... Equation 2
Given: P = 115 kPa, V = 15.0 dm³, T = 33°C = (33+273) K = 306 K, T' = 51.2°C = 51.2+273 = 324.2 K, V' = 8.00 dm³
Substitute these values into equation 2
P' = (115×15×324.2)/(306×8)
P' = 228.4 kPa.
