Answer:
BalloonExplanation:
It comes in different colors, it expands when it's "full". It floats away if it is not tied down and will make a loud noise if it pops (breaks).
WILL GIVE 50 points I can’t get on to the website so plz help.
Explanation:
can you tell us what do want help with?
Answer:
Ok I will give you answer
Project: Communicating Design Details
Answer:
Do you have an idea that you want the design to be about? if you do I can help! if not I can give you ideas you can try to work with and you can tell me if theyre good or not.
Explanation:
How many grams of KCI can be dissolved in 63.5. g of water at 80
Answer:
35.8 g
Explanation:
Step 1: Given data
Mass of water: 63.5 g
Step 2: Calculate how many grams of KCl can be dissolved in 63.5. g of water at 80 °C
Solubility is the maximum amount of solute that can be dissolved in 100 g of solute at a specified temperature. The solubility of KCl at 80 °C is 56.3 g%g, that is, we can dissolve up to 56.3 g of KCl in 100 g of water.
63.5 g Water × 56.3 g KCl/100 g Water = 35.8 g KCl
what is the physical change of a liquid to a solid by the removal of heat?
How much water should be added to 5.00 g of KCl to prepare a 0.500 m
solution? *
Molality = moles of solute
Kg of solvent
100 g
38g
500 g
134 g
Other
Answer:133.4
c
m
3
Explanation: Explanation:
Molarity is number of moles of solute divided by number of litres of solution.
M
=
n
V
Rearrange for V to give
V
=
n
M
Number of moles of KCl is the mass divided by the molar mass of KCl which is 75.5 g/mol, so (5/75.5) = 0.0667 moles.
Now plug in the numbers:
V
=
n
m
=
0.0667
0.5
=
0.1334
litres
So you need to add 0.1334 litres of 133.4
c
m
3
of water.
(NB: symbol for molarity is upper case M. m is metres).
Perform the following operation and express the answer in scientific notation. 7.0x10^3 x 1.1x10^7
Answer:
The answer is 7.7 ×10¹⁰
Explanation:
7.0 × 10³ × 1.1 × 10⁷
7.7 ×10¹⁰
Thus, The answer is 7.7 ×10¹⁰
-TheUnknownScientist
answer truthfully:))
Answer:
Formula: [tex]Velocity \: V = f \lambda \\ Solution: = 5 \times 0.8 \\ = 4 \: {ms}^{ - 1} [/tex]
Answer:
The first guy is correct. That's what I got too
This is Science
How does the process of photosynthesis help the overall life on earth? (Hint: what does it produce that living things need to live?)
Answer: Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.
Explanation:
IS ANYONE GOOD AT CHEMISTRY?! like frr.
I need help
If I have an unknown quantity of gas at a pressure of 204.83 kPa, a volume of 27.88 liters, and a temperature of 8.76°C , how many moles of gas do I have?
Answer:
700
Explanation:
How to find
Multiply the volume and pressure and divide the product by the temperature and the molar gas constant to calculate the moles of the hydrogen gas.
Solve: 204.83 × 27.88 / 8.76 = 651.901872146
Which is 651.90
In the nearest hundredths, the moles of gas is 700
Hydrocarbons separated by fractional distillation of petroleum can be cracked to make
useful shorter chain products.
Which substance is not a product of the cracking of propane, M, 44?
A C.Hg
B C2H4
C C3H6
DH2
Q Zoom image
Answer:
{ x R X
Daraaranh
a
o
זחו
Answer:
c.hg cannot be cracked for fractional distillation as there is only one of each
Explanation:
17. If the pOH of a solution is 4.5, What is the pH ?
A) 8.5
B) 7.5
C) 9.5
D) 7.0
Answer:
C)9.5
Explanation:
Given poH=4.5
find ph
from 14=ph+poh
14=ph+4.5
ph=9.5
Calcula la densidad del gas a TPE para los siguientes: 969cm3 de un gas 64 grados C y 96.4 kPa con una masa de 1.64g
Respuesta:
2.17 × 10⁻³ g/cm³
Explicación:
Paso 1: Información provista
Volumen inicial (V₁): 969 cm³Temperatura inicial (T₁): 64 °CPresión inicial (P₁): 96.4 kPaVolumen en TPE (V₂): ?Presión estandar (P₂): 100 kPaTemperatura estandar (T₂): 273.15 KPaso 2: Convertir 64 °C a Kelvin
Usaremos la siguiente fórmula.
K = °C + 273.15 = 64 °C + 273.15 = 337 K
Paso 3: Calcular V₂
Usaremos la ecuación combinada de los gases ideales.
P₁ × V₁ / T₁ = P₂ × V₂ / T₂
V₂ = P₁ × V₁ × T₂ / T₁ × P₂
V₂ = 96.4 kPa × 969 cm³ × 273.15 K / 337 K × 100 kPa = 757 cm³
Paso 4: Calcular la densidad del gas a TPE
A TPE, 1.64 g del gas ocupan 757 cm³.
ρ = 1.64 g/757 cm³ = 2.17 × 10⁻³ g/cm³
Hydrogen gas and nitrogen gas come together to form ammonia. If 25.0 g of nitrogen is mixed with hydrogen, what volume of hydrogen is needed to complete the reaction? (grams to volume)
Answer:
60.0L of hydrogen are needed
Explanation:
Based on the reaction:
3H₂ + N₂ ⇄ 2NH₃
3 moles of hydrogen react 1 mole of nitrogen.
To solve this question we have to find the moles of nitrogen. With the moles of nitrogen we can find the moles of hydrogen. Using PV = nRT at STP conditions we can find the volume as follows:
Moles Nitrogen -Molar mass: 28g/mol-
25.0g N₂ * (1mol / 28g) = 0.893 moles N₂
Moles hydrogen:
0.893 moles N₂ * (3mol H₂ / 1mol N₂) = 2.679 moles H₂
Volume hydrogen:
PV = nRT
V = nRT / P
Where V is volume in liters,
n are moles of the gas: 2.679 moles
R is gas constant: 0.082atmL/molK
T is absolute temperature: 273.15K at STP
P is 1atm at STP
Replacing:
V = 2.679mol*0.082atmL/molK*273.15K / 1atm
V =
60.0L of hydrogen are needed
BRAINLIEST NO LINK OR REPORTED A beach ball has a volume of 2.5 L of gas while at a temperature of 500 K. If the volume decreases to 2 L, what is the new temperature?
a. .25 K
b. 250 K
c. 400 K
d. 4k
Answer:
250k
I Really This Helps A Little Bit.
How much heat is gained by 1.25 grams of ice?
Answer:
Heat gained by 1.25 grams of ice is 250 joules
Explanation:
As we know
[tex]Q = mc\Delta[/tex]T
Where
[tex]\Delta[/tex]T is the change in temperature
Water freezes at 273.15 K/0 degree Celsius, and it boils at 373.15 K/00 degree Celsius,
[tex]\Delta[/tex]T
m is the mass in grams
c is the specific heat of water (ice) = 2.05 joules/gram
Substituting the given values, we get -
[tex]Q = 1.25 * 2.0 * 100\\Q = 250[/tex]Joules.
25 ml of 2.4 M K2(CO3) is mixed with 35 ml of 2.0 M Al(NO3)3. (a) Evaluate the moles for each reactant (b) indicate the limiting reactant (c) how many moles of Al2(CO3)3 are formed?
Answer:
a) 0.06 mol K₂(CO₃) and 0.07 mol Al(NO₃)₃
b) The limiting reactant is K₂CO₃
c) 0.03 moles of Al₂(CO₃)₃
Explanation:
The balanced reaction between K₂CO₃ and Al(NO₃)₃ is the following:
3 K₂CO₃ + 2 Al(NO₃)₃ → Al₂(CO₃)₃ + 6 KNO₃
(a) We can calculate the moles for each reactant as the product of the molarity (M) and the volume (V) in liters.
K₂(CO₃): M = 2.4 mol/L , V = 25 mL x 1 L/1000 mL = 0.025 L
⇒ moles K₂(CO₃) = M x V = 2.4 mol/L x 0.025 L = 0.06 mol K₂(CO₃)
Al(NO₃)₃: M = 2.0 mol/L , V = 35 mL x 1 L/1000 mL = 0.035 L
⇒ moles Al(NO₃)₃ = M x V = 2.0 mol/L x 0.035 L = 0.07 mol Al(NO₃)₃
(b) According to the balanced equation, the stoichiometric ratio is 3 moles K₂CO₃/2 moles Al(NO₃)₃. We have 0.07 moles of Al(NO₃)₃, so we multiply the moles of Al(NO₃)₃ by the stiochiometric ratio to calculate how many moles of K₂CO₃ are needed:
0.07 mol Al(NO₃)₃ x 3 mol K₂CO₃/2 mol Al(NO₃)₃ = 0.105 moles of K₂CO₃
We need 0.105 moles of K₂CO₃ but we have only 0.06 moles of K₂CO₃. Therefore, the limiting reactant is K₂CO₃.
(c) We use the limiting reactant to calculate how many moles of product (Al₂(CO₃)₃) are formed. According to the equation, 2 moles of K₂CO₃ produce 1 mol of Al₂(CO₃)₃, thus the stoichiometric ratio is 1 mol Al₂(CO₃)₃/2 moles K₂CO₃. We have 0.06 moles of K₂CO₃, so the number of moles of Al₂(CO₃)₃ will be:
0.06 moles K₂CO₃ x 1 mol Al₂(CO₃)₃/2 moles K₂CO₃ = 0.03 moles of Al₂(CO₃)₃
If energy was added to solid, what state would it change to
A. Super solid
B. Plasma
C. Liquid
Answer:
Explanation:
The answer is C Liquid
How many molecules are in 0.33 moles of CaCO3?
25 Which factor causes global wind patterns?
A changes in the distance between Earth and the Moon
B unequal heating of Earth's surface by the Sun
C daily changes in the tilt of Earth's axis
D rapid rotation of the Sun on its axis
Answer:
B
Explanation:
What is the specific heat of a metal (in J/g℃) that weighs 150 g and absorbs 1.2 kJ (or 1,200 J) of heat when the temperature rises by 50.0℃?
Answer:
0.16 J/g℃
Explanation:
We have the following data:
heat = 1,200 J
mass of metal = m = 150 g
change in temperature = ΔT = 50.0℃
The heat absorbed is calculated by using the following equation:
heat = m x Cp x ΔT
So, we introduce the data in the equation to calculate the specific heat of the metal (Cp), as follows:
Cp = heat/(m x ΔT) = (1,200 J)/(150 g x 50.0℃) = 0.16 J/g℃
what may happen when two light waves traveling from oposite directoins meet?
Answer:
The meet
Explanation:
kaillie was talking and was distracted as she stirred sugar into her tea. when she finally noticed, there was a few crystals of sugar in the bottom of her cup that would not dissolve. what type of tea solution did kaillie?
a. unsaturated
b. saturated
c. supersaturated
d. cannot be determined
Answer:
Supersaturated
Explanation:
The tea has absorbed and dissolved as much sugar as it could. If there is sugar left at the bottom, it means the solution is supersaturated because it can't absorb any more.
The diagram below represents the bone
arrangements in the front limbs of three different
species of mammals.
The similarities and differences in these limbs
suggest that all three species developed from the
same ancestor, but
Answer:
these species share a common ancestor
Explanation:
A .3 piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 63500 J. If the specific heat of copper is 390 J/g degrees celsius, what is the temperature change during this process
Answer:
600k
Explanation:
6300j//390j/g
=600k
Why particles start vibrating in solids?
it's argent
Explanation:
The particles of matter are continuously in motion due to which tehy collide with each other, and this creates a vibration in the solids
I hope it is correct ☺️
Solutions that are very concentrated have greater freezing point depression Group of answer choices true or false
Answer:
Explanation:
False. The greater the concentration, the lower the freezing point.
Which element has 1 valence electron in its outer shell and will react with a
group 17 element in a li ratio?
A. Chlorine
B. Calcium
C. Boron
D, Sodium
Answer:
[tex]\boxed {\boxed {\sf D. \ Sodium}}[/tex]
Explanation:
Valence electrons are electrons in the outermost shell.
One way to find valence electrons is with the electron configuration. This is often found on the Periodic Table. The last number in this configuration is the number of valence electrons, because an electron configuration shows where electrons are located and the last number represents the outer shell.
Chlorine: 2-8-7 (7 valence electrons)Calcium: 2-8-8-2 (2 valence electrons)Boron: 2-3 (3 valence electrons)Sodium: 2-8-1 (1 valence electron)In addition, all group 1 or alkali metals have 1 valence electrons. These include lithium, sodium, potassium, rubidium, cesium, and francium.
Even though we already know it is sodium based on valence electrons, here is an explanation of the reaction ratio.
Since sodium has 1 valence electron, it wants to get rid of it to satisfy the Octet Rule (8 valence electrons). Group 17 elements have 7 valence electrons, so they need 1. The two elements will react in a 1 to 1 ratio because the sodium donates its 1 excess electron to the group 17 element that needs 1.
The element that has 1 valence electron in its outer shell and will react with a group 17 element in a 1:1 ratio is sodium. Therefore, the correct option is option D.
The electrons in an atom's highest energy level, commonly referred to as the valence shell, are called valence electrons. These electrons interact with other atoms and participate in chemical bonds. Alkali metal sodium (Na), which belongs to group 1 of the periodic table, contains one valence electron in its outermost shell. Halogens, or group 17 elements, have 7 valence electrons.
Chlorine (Cl) is a member of group 17 and combines with sodium to generate sodium chloride (NaCl), an ionic compound. One sodium atom contributes its one valence electron to a chlorine atom, creating a stable ionic connection.
Therefore, the correct option is option D.
To know more about valence electron, here:
https://brainly.com/question/31264554
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When fluorine gas is put into contact with calcium metal at high temperatures, calcium fluoride powder is created in an exothermic reaction
Answer:
True,When fluorine gas is put into contact with calcium metal at high temperatures, calcium fluoride powder is created in an exothermic reaction.
1. The respiratory system depends on the nervous system for signals to:
Answer:transfer oxygen through your blood
Explanation:
Answer:
coordinate the muscles that control breathing
hope this helps ⭐