Explanation:
In general, the longer that moisture is present, the greater the chance for mold to grow and spread. When mold spores encounter a moist surface, it starts growing within a few hours, spreading into the material while also filling the air with thousands of mold spores.
how many moles of HNO3 would be formed from 1.0 mole of NO2
What amount of heat (in kJ) is required to convert 19.8 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? (specific heat capacity of liquid = 1.58 J/g･°C; specific heat capacity of gas = 0.932 J/g･°C; ∆Hvap = 22.5 kJ/mol; normal boiling point, Tb = 57.3°C)
The total energy required to convert the unknown liquid to gas at the given temperature is 7.215 kJ.
The given parameters;
mass of the unknown liquid, m = 19.8 gmolar mass of liquid = 83.21 g/molinitial temperature of the liquid, = 19.2 °Cboiling point temperature of the liquid, = 57.3°Cfinal temperature of the liquid = 93.5 °CThe total heat required to convert the liquid to gas is calculated as follows;
H = Heat to raise to boiling temp. + Heat to vaporize the liquid + Heat of gas vapor
The heat required to raise the temperature of the liquid to boiling point;
[tex]H_1 = mc\Delta t\\\\H_1 = 19.8 \times 1.58 \times (57.3 - 19.2)\\\\H_1 = 1,191.92 \ J\\\\H_1 = 1.1919 \ kJ[/tex]
The number of moles of the liquid is calculated as;
[tex]moles= \frac{19.8 \ g}{83.21 \ g/mol} = 0.238 \ mol[/tex]
The heat required to vaporize the liquid;
[tex]H_2 = n H_{vap}\\\\H _2 = 0.238 \times 22.5\\\\H_2 = 5.355\ kJ[/tex]
The heat of the gas vapor is calculated as;
[tex]H_3 = mc_g \Delta t\\\\H_3 = 19.8 \times 0.932 \times (93.5- 57.3)\\\\H_3 = 668.02 \ J\\\\H_3 = 0.668 \ kJ[/tex]
The total energy required to convert the unknown liquid to gas at the given temperature is calculated as;
[tex]H_{total} = 1.1919 \ kJ \ + \ 5.355 \ kJ \ + \ 0.668 \ kJ\\\\H_{total} = 7.215 \ kJ[/tex]
Thus, the total energy required to convert the unknown liquid to gas at the given temperature is 7.215 kJ.
learn more here:https://brainly.com/question/13944094
I will brainless who can answer this all pleaseeeeej
Answer:
cracks in the road, hot air balloons, tire bursts
Explanation:
cracks in the road: the road expand on heating
hot air balloons: Because the hot air inside the balloon bag increases in size faster than the container it stretches the bag so that it expands and displaces the colder (heavier) air outside the bag
tire bursts in hot days when filled full of air due to thermal expansion
PLEASE MARK BRAILIEST,THANKS <3
molecular formula of sulphur trioxide by criss cross method
Answer:
Sulfur trioxide: SO3.
Explanation:
How I came to this conclusion:
I noticed that the compound consists of non-metals, therefore it must be a covalent compound -
meaning I use prefixes for compounds.
Sulfur is S. Simple enough. Trioxide has the prefix of tri, meaning "3". Therefore there is 3 atoms of oxygen. Combine them and I get SO3.
Don't be confused with sulfite: (SO3)2− and sulfate: (SO4)2−
why did rutherford think that all of the alpha particles would go straight through?
pliz answer 1 & 2 .... I'll tag best answer brainliest .... no spamming
1,chlorine ions
2,sodium chloride
What do all cations have in common? Check all that apply.
A. positive
B. negative
C. metals
D. non-metals
Answer:
B
Explanation:
All cations have more protons than electrons so they always have a positive charge.
what happens when potassium reacts with fluorine to produce potassium fluoride
Answer:
In order to obtain eight valence electrons (an octet), the potassium atom will transfer its single valence electron to the fluorine atom.
Fill in the blanks
a. Silica gel is used as …………… .
b. The ………. distillation is used to obtain petroleum products from crude oil.
c. Chromatography is used to separate………… .
d. Liebig’s condenser is used in ………… .
e. Plant pigment can be separated by …………… .
Answer:
a:It is used as a moisturizer
b:Paraffin
c:Dissolve substances
d:Chemical distillation
e:Paper chromatography
I will brainless who can answer this all pleaseeeeej
Answer:
1. False
2. True
3. False
4. False
5. False
6. True
7. True
8. not sure
9. True
10. False
Explanation:
bnmmmmmmmxsdcwwegvwwfdvsdv
Answer:
bnmmmmmmmxsdcwwegvwwfdvsdv
a train car is to a train as a…
Two scientists work together on an experiment, but they have different hypotheses. When scientists look at the experimental results, they interpret the data in different ways and come to different conclusions. Which of the following does this situation best illustrate?
Answer:
The correct answer is option D, confirmation bias.
The correct answer is option D, confirmation bias.Confirmation bias is the tendency to interpret data in a way that confirms the already designed hypotheses.
The correct answer is option D, confirmation bias.Confirmation bias is the tendency to interpret data in a way that confirms the already designed hypotheses.As the two scientists interpret the data (or experimental results) in different ways to adhere to the different hypotheses. this is also called indicative of cognitive bias. This is also called inductive reasoning where the premise is viewed as evidence for the validity of the conclusion.
Answer:
d
Explanation:
got it right on plato
Determinar los gramos de ácido clorhídrico que se requiere para preparar 500 ml de solución 0.2 M de ácido clorhídrico
Answer:
m = 3.65 gram
Explanation:
ácido clorhídrico = HCl
M = m/Mr × 1000/mL
0.2 M = m/36.5 gr/mol × 1000/500 mL
0.2 M = m/36.5 gr/mol × 2
m/36.5 gr/mol = 0.2 M/2/L
m/36.5 gr/mol = 0.1 mol
m = 36.5 gr/mol × 0.1 mol
m = 3.65 gram
PLEASE HURRY AND TELL ME THE ANWERS
Answer:
Explanation:
Que instrumentos de laboratorio usaron luis y Juan?
Luis y Juan querían hacer una investigación sobre la rapidez de disolución de una pastilla efervescente en el ácido acético a temperatura caliente. Para esto, tenían que triturar la pastilla y luego utilizar solamente 15 gramos de la sustancia. Tenían que medir 50 ml de ácido acético y colocar el mismo en un recipiente donde se pueda calentar sustancias, pero que el vapor generado se libere rápido. Al agregar ambas sustancias al recipiente de vidrio, lo comenzaron a calentar. Una vez se iba calentando, agitaron las sustancias poco a poco y con mucho cuidado, tomaron los cambios en temperatura de cada 2 minutos. Al finalizar el experimento, ellos compartieron sus resultados con sus compañeros de clase.
Drop it into water. Measure the time required for tablet to fully dissolve. Be prepared to start and stop on time. The reaction will take less than 15 seconds.Answer:
Explanation:
convert using metric and U.S. conversion factor. Convert 0.672 ft to mm
Answer:
204.8256
Explanation:
What does this picture represent?
A.
Volumetric flask
B.
Erlenmeyer flask
C
Graduated cylinder
D.
Beaker
Answer:
The answer is D.) Beaker. Hope this helps! :)
What is the final temp of
solver if the temperature of
25.89 sample of silver
starts out at 30.0°C and
40.5) of heat is added?
The specific heat of silver
130235 ](°C).
PLEASE ANSWER THIS ILL GIVE YOU BRAINLIEST
Back injuries can be crippling and severely limit one’s function and quality of life.
How would your life be affected by a back injury?
What modifications would you have to make to your home if you were confined to a wheelchair?
Which of your hobbies and activities would be affected if you could no longer walk?
A back injury would impact literally every aspect of your life.
You would need to either install a starlit, a lift, or move to a bungalow or bottom floor apartment.
The only hobbies you would be able to complete with no modifications would be what I call stationary hobbies- when you sit and do something, for example, knitting or sewing. However, some sports can be altered to allow for those in a wheelchair to play.
Convert SI units .68mm. =km
Convert 68 Millimeters to Kilometers (mm to km) with our conversion calculator and conversion tables. To convert 68 mm to km use direct conversion formula below.
68 mm = 6.8E-5 km.
You also can convert 68 Millimeters to other Length (popular) units.
- BRAINLIEST answerer ❤️✌
1. You were tasked to check if the liquid sample you have is a substance or a mixture.
Which among these tasks is the BEST way to do so?
1. Color comparison
Il. Taste comparison
III. Boiling Test
iv.
Melting Test
Answer:
boiling test or melting test
Explanation:
Finalmente responde:
- ¿Cuáles serían las características del agua filtrada que evidencie el funcionamiento del filtrador?
– Consideras que volver a filtrar la misma muestra de agua ¿disminuye la turbidez del agua?,, AYUDAAAAAAAAA
El agua se purifica a partir de un proceso de filtrado. Las características que evidencian el filtrado incluyen pH normal, color cristalino, ausencia de metales pesados y/o microorganismos, etc.
Los filtros para purificar agua son dispositivos que permiten el limpiado del agua con el objetivo de convertirla apta para consumo humano.En general, los filtros para lograr la purificación del agua consisten de carbón activado, el cual se prensa con alta presión. Este dispositivo de carbón activado permite secuestrar las partículas sólidas que pasan a través del filtro, con lo cual el agua sale a través del filtro completamente purificada.Las características que permiten determinar si el agua ha sido correctamente filtrada incluyen:
El agua sale cristalina, es decir, sin ningún tipo de color que evidencie la presencia de contaminación.El pH del agua potable debe oscilar entre valores normales (6,5 a 8,5)No debe contener metales tales como plomo, arsénico o cadmio (altamente tóxicos)No debe contener microorganismosAprende más sobre este tema en:
https://brainly.com/question/24806243?referrer=searchResults
"type one to two paragraphs describing the changes in potential and kinetic energy of the cart.
Be sure to discuss how the potential and kinetic energy of the cart changes at each of the four
positions along the track, and explain why these changes occur."
Click the links to open the resources below. These resources will help you complete the assignment. Once you have created your file(s) and are ready to upload your assignment, click the Add Files button below and select each file from your desktop or network folder. Upload each file separately.
Your work will not be submitted to your teacher until you click Submit.
Documents
Student Guide
Rubric
File Upload
Accepted file types: .ppt, .pptx, .xls, .xlsx, .doc, .docx, .zip, .pdf, .accdb, .msg
The cart starts out in position A with high potential energy, low kinetic energy, and some thermal energy. As the cart progresses into position B, the kinetic energy begins to increase and the potential energy begins to decrease; as the thermal energy increases as thermal energy from the track is transferred to the cart through friction. Once the cart reaches position C, it has high kinetic energy, low potential energy, and some thermal energy. At position D, the cart has high potential energy, low kinetic energy, and some thermal energy. The potential energy throughout is correlated to gravity, the kinetic energy is correlated to momentum, and the thermal energy is correlated to friction. The potential energy is at its maximum during position A, and its minimum at position C; the kinetic energy is at its maximum during position C, and its minimum at position A; the thermal energy is at its maximum during position B, and its minimum at position A
Which is not the correct grouping of elements? (Refer to periodic table)
A. Argon, potassium, slicon, strontium
B. Darmstadtum, nickel, piatinum, palladium
C. Barum berrylium, calcium, radium
D. Cesium, hydragon, lithium, sodium
Please help me guys..I need the answer ASAP!..(｡ŏ﹏ŏ)(╥﹏╥)
The incorrect grouping of elements is Argon, potassium, slicon, strontium.
What is periodic table?Periodic table is a systematic arrangement of chemical elements within the coloums and rowns on the basis of their properties.
In all options given elements belongs from the same group except the first one, beacuse in argon, potassium, silicon & strontium all are present in different groups of periodic table. As argon is present in the 18th group, potassium is present in the 1st group, silicon is present in the 14th group and strontium is present in the 2nd group of the periodic table.
Hence, correct option is (A).
To know more about periodic table, visit the below link:
https://brainly.com/question/10892900
the breakdown of glucose is linked to cellular work by a chemical driveshaft known as
Answer:
ATP
Explanation:
How many moles of fluorine gas are in 54.1 grams of fluorine gas?
Answer: 2.85 moles of flourine
Explanation:
find the atomic/molar mass of flourine on your periodic table.
multiply the given mass (54.1g) by (1 mole of flourine/atomic mass of flourine)
54.1g flourine * 1mole of flourine/18.998g flourine
(g flourine) in the above equation cancel each other.
54.1/18.998 = 2.85 mole of flourine
SUPER EASY. just check if i'm right or not. WILL GIVE BRAINLIEST
Answer:
what is the question
Explanation:
Answer:
Um what do u want us to check?
Explanation:
Please tell me the answer, I will mark the first person to answer brainlist
Answer:
there would be not movement.
Arrange the following elements in order of increasing atomic radius.
K, Li, O, Se
Answer:
Olkgvvyvvbhhhjuj link here
www.com answer BRANLY.com