Answer:
Energy (latent heat)
Explanation:
Latent heat of fusion for solid to liquid
Latent heat of vaporization for liquid to gas.
Answer:
it requires the present of heat
Explanation:
when there is heat the solid will melt into liquid and from liquid when it is heated for example when water is heated it evaporate into vapor which is gas
A candle burning is an example of _____.
Answer:
The burning of a candle is both a physical and a chemical change.
Explanation:
Plz mark brainliest thanks
Which term describes living things? abiotic biotic
Answer:
biotic
Explanation:
What does the poitof incidence mean?
Answer:
Point of incidence: The point on the surface where the incident ray strikes the surface is called the point of incidence. Reflected ray: The ray of light that bounces back from the surface of an object is called a reflected ray of light.
Explanation:
Search
If a candle is burning in an open room, which reactant is in excess?
Answer:
a
Explanation:
how can a magnet attract an apple
I need help ASAP please
I will give thanks with Brainlist for correct answer
True or false
(Question on the pic)
Answer:
yes true
Explanation:
based off my common sense as if you were to rub your hands together to warm up, it creates friction creating heat
How many grams of carbon dioxide would 6.0E25 molecules be?
Answer:
4383.28 g
Explanation:
First we'll need to convert molecules into moles, we can do so using Avogadro's number:
6.0x10²⁵ molecules ÷ 6.023x10²³ molecules/mol = 99.62 molesThen we will convert 99.62 moles of carbon dioxide (CO₂) into grams, using its molar mass:
99.62 moles CO₂ * 44 g/mol = 4383.28 gI need help question 11
Answer: i think it's A.
Explanation: i cant quite explain
Can skin help animals see?
Answer:
Explanation:
Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation. Other animal coverings, such as the arthropod exoskeleton, have different developmental origin, structure and chemical composition.
A pile of leaves is lit on fire and covered completely with a fire blanket. The fire goes out. Identify the limiting reactant
Which of the following heat transfer methods is when heat is transferred through fluids, such as air?
a
radiation
b
convection
c
conduction
d
none of these
Which set up would correctly complete the work for determining how many moles of NaOH will be produced if 10.5 grams of water (H2O) is used?
Answer:
B: 2 mol NaOH/2 mol H2O
Explanation:
The reaction equation is;
H2SO4 + 2NaOH = Na2SO4 + 2H20
Now, to know how many moles of NaOH will be produced for 10.5 grams of water (H2O) used, and since the molar mass of H2O is 18.02 g/mol and number of moles attached to H2O and NaOH in the reaction are both 2 we will have;
10.5g H2O × 1 mol H2O/18.02 g H2O × 2 mol NaOH/2 mol H2O
Thus correct answer is option B
Which of the following is not an example for electroplating? A Tin cans for storing food
B Chromium used on bath taps to get shiny appearance
C Copper used for making electrical wires
D To protect iron objects used in machineries, from corrosion
If you answer you will get brainiest
Please answer and thank
Answer:
C. Copper used for making electrical wires
Explanation:
When a coating of a particular metal is applied on another metal, the process is termed as electroplating. The process is carried by the process of electro-deposition. This process is carried on in order to enhance the quality of the objects manufactured. The coating helps in resistance and provides an attractive appearance to the object.
Option C. is not an example of electrocoating because on the copper wires no other metal coating is done. In all the other three options, coating has been done on the object.
Unicellular organisms are made up of many different cells.
True
False
Answer:
false
Explanation:
uni means one so that means there is only one cell
In an ecosystem, which of the fcHlowing is NOT a trait of living organisms?
Contains DNA
Can reproduce
Made of cells with membrane
Responds to stimuli
Answer:
responds to a stimuli or made of cells with membrane
Explanation
Which of the following describes wind direction?
How fast the wind is moving
Where the wind is coming from
How strong the wind is
Where the wind is going
Answer:
where the wind is going
Explanation:
direction is where something is going hope it helps
Answer: number 4 Where the wind is going
Explanation:hope this helps u
The equation for the synthesis of water is given below.
2
H
2
+
O
2
→
2
H
2
O
How many grams of oxygen gas are needed to produce 36.0 grams of water?
Answer:
32g grams of oxygen gas is needed to produce 36.0 grams of water
Help I will give brainlest
Answer:
grasslands ia the answer!
what is the coefficient in this chemical formula? 3C6H12O6
A. 12
B. 18
C. 3
D. 6
Que cantidad de agua sera necesaria agregar a 25 gramos de sulfato de cobre II para preparar una solución al 15% m/m?
Answer:
141.7 de Agua deben ser adicionados para preparar la solución deseada
Explanation:
El %m/m se define como la masa de soluto (En este caso, sulfato de cobre) en 100g de solución (Sulfato de cobre + Agua):
%m/m = Masa soluto / Masa soluto + Masa Agua *100
Reemplazando con los datos del problema:
15%m/m: 25g CuSO₄ / (25g CuSO₄ + Xg H₂O) * 100
0.15 = 25 /(25+X)
3.75 + 0.15X = 25
0.15X = 21.25
X = 141.7 de Agua deben ser adicionados para preparar la solución deseada
What tools and technology
predict weather changes?
Answer:
Observational data collected by doppler radar, radiosondes, weather satellites, buoys and other instruments are fed into computerized NWS numerical forecast models. The models use equations, along with new and past weather data, to provide forecast guidance to our meteorologists
Equilibrium constant Kp for the reaction P4(s) + 6Cl2(g) 4PCl3(l) Kp = 1/ P6Cl2 Kp = P4Cl3/ P6P4 Kp = P4Cl3/ (P6P4) (P6Cl2) Kp = 1/ (P6P4) (P6Cl2)
Answer: [tex]K_p=\frac{1}{[p_{Cl_2}]^6}[/tex]
Explanation:
Equilibrium constant is defined as the ratio of pressure of products to the pressuure of reactants each raised to the power their stoichiometric ratios. It is expressed as [tex]K_p[/tex]
For the given chemical reaction:
[tex]P_4(s)+6Cl_2(g)\rightarrow 4PCl_3(l)[/tex]
The expression for [tex]K_p[/tex] in terms of gaseous is written as:
[tex]K_p=\frac{1}{[p_{Cl_2}]^6}[/tex]
En 50 gr de de agua se disuelven 10 gr de NaCl con una densidad de 1,08 m/cm3. Hallar la M y la m a. 3,06 M y 3,06m b. 3,06 M y 3,4 m c 3,4 M y 3,06 m d 3,5 M y 3,4 m
Answer:
Opcion b. 3.06M y 3.4 m
Explanation:
Nuestra solución se compone de:
Soluto → NaCl (10 g)
Solvente → agua (50 g)
Primero, convertimos la masa de soluto a moles:
10 g . 1mol / 58.45g = 0.171 moles
Convertimos la masa de solvente, de g a kg → 50 g . 1kg/1000 g = 0.05 kg
m → molalidad (tipo de concentración que relaciona los moles de soluto en 1kg de solvente)
m = mol/kg → 0.171 mol/0.05kg = 3.42 m
Para calcular M, necesitamos el volumen de solución, y para eso aplicamos densidad. Antes, sumamos masa de soluto + masa de solvente, para obtener la masa de solución
50 g + 10 g = 60 g de solución
d = m /v → v = m /d → 60g / 1.08g/cm³ = 55.5 cm³
cm³ = mL
M = molaridad, la concentración que relaciona los moles de soluto en 1L de solución, pero que también podemos predecir como los milimoles de soluto en 1 mL de solución.
El volumen de solución está en mililitros → 55.5 mL
Convertimos moles a milimoles → 0.171 mol . 1000 mmol /mol = 171 mmol
M = 171 mmol /55.5 mL → 3.08 M
Topics on how humans use energy pls can somebody give me a few..
Answer: Humans use energy to carry out their daily activities, like moving around, working, running etc.
Explanation:
what is the number of neutrons in the element Nickel?
Answer:
Number of Protons, 28. Number of Neutrons, 31. Number of Electrons, 28
Explanation:
N/A
answer: nickel element has 30 neutrons
Which change in pH represents a hundredfold increase in the concentration of hydronium ions
in a solution?
(1) pH 1 to 2
(2) pH 1 to 3
(3) pH 2 to 1
(4) pH 3 to 1
Answer:(4) pH 3 to 1
Explanation:
im 95% sure its the right answer
What is the molecular geometry of BCl3
a. otriginal planar
b. trigonal pyraminad
c. tetrahedral
d. liner
If 0.525 moles of O2 are produced, how many moles of KClO3 are decomposed?
Answer:
B. 0.35mol KClO3
Explanation:
The balanced equation in this question is given as follows:
2KClO3 → 2KCl + 3O2
Based on the chemical reaction;
2 moles of KClO3 decomposes into 3 moles of O2
If 0.525 moles of O2 are produced, then:
= 0.525 × 2/3
= 1.05/3
= 0.35mol of KClO3 is decomposed.
HELLP PLEASE
_ Na+Cl 2 -> _NaCl
reactant side number of atoms?
Na = ?
Cl = ?
Product side number of atoms?
Na = ?
Cl = ?
what is the final equation?
_ Na+Cl 2 -> _NaCl
Answer:
2Na+Cl2 -> 2NaCl
Explanation:
1Na+1Cl 2 -> 1NaCl (i'm assuming they want you to balance it so ill start with 1)
Na = 1
Cl = 2 (it is 2 because it is Cl2, meaning that there are 2; but remember that you cannot change this number only coefficients)
Na = 1
Cl = 1
We need to have 2 Cl on the product side
1Na+1Cl 2 -> 2NaCl
Now we need 2 Na on the reactants side
The final equation is
2Na+Cl2 -> 2NaCl
Now it is balanced
Na = 2
Cl = 2
--
Na = 2
Cl = 2
i need help guysssss
Answer:
D
Explanation:
It increases fast.