Answer:
Constrictive
Explanation:
A scuba diver is using scuba gear to breathe under water. The pressure on her lungs is 2.5 atm and her lung volume is 4.4 L. What will happen to the volume of her lungs when the pressure increases to 4.5 atm?
Answer:
2.44 LExplanation:
The volume can be used by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2 \\ [/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we're finding the final volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
We have
[tex]V_2 = \frac{2.5 \times 4.4}{4.5} = \frac{11}{4.5} \\ = 2.444444....[/tex]
We have the final answer as
2.44 LHope this helps you
Helpppp plzzz (will mark brainlest)
Answer:
hydrogen and cloride + hydrogen
How many joules are required to heat 15 grams of ice from -200⁰ to 1400⁰ C?
Answer: A heat energy of 50160 joules are required to heat 15 grams of ice from [tex]-200^{o}C[/tex] to [tex]1400^{o}C[/tex].
Explanation:
Given : mass of ice = 15 g
Convert grams into kg as follows,
[tex]1 g = 0.001 kg\\15 g = 15 g \times \frac{0.001 kg}{1 g}\\= 0.015 kg[/tex]
Initial temperature = [tex]-200^{o}C[/tex]
Final temperature = [tex]1400^{o}C[/tex]
Formula used to calculate the amount of heat energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass of substance
C = specific heat of substance (ice here has C = [tex]2090 J/kg ^{o}C[/tex])
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 0.015 kg \times 2090 J/kg^{o}C \times [1400 - (-200)]^{o}C\\= 50160 J[/tex]
Thus, we can conclude that 50160 joules are required to heat 15 grams of ice from [tex]-200^{o}C[/tex] to [tex]1400^{o}C[/tex].
Who was one of the first scientists to realize the effects of CO2 in the atmosphere? where was it measured?
I give Brainliest! Please no links
what are the properties of a thermal insulator
Answer:
They have lower thermal conductivity They often have high air permeability They are non combustible They are light in weight They are stable chemically and physically at high tempDescribe the structure of cellulose molecules
Answer:
Cellulose is a made up of thousands of D-glucose subunits. The glucose subunits in cellulose are linked via beta 1-4 glycosidic bonds.
A gas occupies 2.50 L at 1.5 atm. What will be the volume of this gas if the
pressure becomes 1.25 atm?
Answer:
2.08 L
Explanation:
[tex]V_{2} = V_{1}[/tex] [tex](\frac{P_{2} }{P_{1} })[/tex]
= 2.50L × [tex](\frac{1.25 atm}{1.5 atm} )[/tex]
=2.08L
Explain how natural resources are identified and why natural resources are unevenly distributed.
Please help me I will write this in my own words and you will be given 20 points ad brainlist also please don't put a super long answer just a small simple paragraph and don't give me a link..
Answer:
Natural resources are naturally formed of course(wood copper fruits) and they are not distributed evenly due to competition of getting them and the prices of the resources
Explanation:
Cuántos mililitros de agua hay en 3 litros de una botella de naranjas y las solucion tiene una concentracion de 20% v/v
Respuesta:
2400 mL
Explicación:
Paso 1: Información dada
Volumen de solución: 3 L (3000 mL)Concentración de naranja: 20 % v/vPaso 2: Calcular el volumen de naranja
La concentración de naranja es de 20 % v/v, es decir, cada 100 mL de solución hay 20 mL de naranja.
3000 mL Sol × 20 mL Naranja/100 mL Solución = 600 mL Naranja
Paso 3: Calcular el volumn de agua
El volumen de soluciónes igual a la suma de los volúmenes de naranja y agua.
VSolución = VNaranja + VAgua
VAgua = VSolución - VNaranja
VAgua = 3000 mL - 600 mL = 2400 mL
How many moles of NaCl are present in .05 L of 2.3 M NaCl solution?
Answer:
n = 1.15 mol
Explanation:
C = n/ V
n= C×V
n= 2.3× 0.5
n = 1.15 mol
1. A certain first-order reaction has a half-life of 75 minutes.
A. Find the rate constant, including the correct units.
B. How long would it take for the reaction to reach 62% completion?
2.Using the same half-life and %-completion values from #2, find the rate constant (with the correct units) and the time needed to reach 62% completion if the reaction was second-order and had a half-life of 75 minutes.
3. A certain reaction has the following form:
aA -> bB
Answer:
don't click on the link above me it's a scam bot
Shoals are raised landforms made of sand and gravel that are commonly found in Florida. They are often called sandbars and are located in and around bodies of water such as oceans, rivers, and lakes. Which factor most commonly causes shoals to form or change shape?
Heavy rain fall most commonly causes shoals to form or change shape making depressions and bars in the sand.
What causes a shoal ?Wave shoaling occurs when surface waves slow down, their wave height rises, and the space between waves narrows as they approach shallow water, like a beach. The waves are said to shoal because of this action, which is known as shoaling.
The shoal, a buildup of silt that might be hazardous to ships in a river channel or on a continental shelf.
Conventionally, it is assumed that the continental shelf is less than 10 metres below sea level at low tide. Shoals are created mostly by the same processes that result in offshore bars.
Thus, Heavy rain fall causes shoals to produce and change shape creating depressions and bars in the sand.
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Energy in a vacuum travels by ___.
A. radiation
B. conduction
C. convection
if 11.74 liters of gas at STP are pumped into a basketball, how many moles of gas are in the basketball? assume the basketball was completely empty prior to filling it with gas
Answer:
0.52 mol
Explanation:
Using the general gas equation formula:
PV = nRT
Where;
P = pressure (atm)
V = volume (Liters)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
At STP (standard temperature and pressure), temperature of a gas is 273K, while its pressure is 1 atm
Using PV = nRT
n = PV/RT
n = (1 × 11.74) ÷ (0.0821 × 273)
n = 11.74 ÷ 22.41
n = 0.52 mol
There are 0.52 moles in the basketball
Describe how crude oil is separated into fractions by fractional distillation.
Answer:
Crude oil is separated by fractional distillation. Crude oil is heated to vaporize the different hydrocarbons in a tank which is cool at the top and hot at the bottom. The vapours then rise and the different hydrocarbons condense at their specific boiling points, allowing them to be separated.
Gas Giant Planets Rocky Small Solar System Star Sun
The ____1_____ and the ____2____ form the ____3____. The sun is an enormous ____4____. The planets move around the sun. Mercury, Venus, Earth, and Mars are the four ____5____, ____6____ planets. Jupiter, Saturn, Uranus, and Neptune are the four ____7____, ____8____ planets
butanoic acid + 1-pentanol
catalyst
→ water +X
Given the equation:
To which class of organic compounds does product X belong?
1. alcohol
2. Ester
3. Ether
4. 4. alkane
Answer: X is an Esther
Explanation: alcohol and carboxylate acid forms esters
When a carboxylic acid and alcohol react then-new substance is produced from esterification and hence is called an ester. Thus, option 2 is correct.
What is esterification?Esterification is the process to make esters from carboxylic acids and alcohol in the presence of an acid catalyst (dry sulphuric acid). The -COOH group of the carboxylic acids contributes to the formation of the esters.
The esterification reactions are reversible reactions and occur at a slower pace. The reaction between an acid and alcohol is shown as:
Butanoic acid + 1-pentanol (catalyst) → water + ester
Therefore, option 2. ester is produced.
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What variables SPEED UP weathering? pick all that apply!
1. Tropical Climate (warm and wet)
2. Cold and Dry Climate
3. Sedimentary Rock such as limestone and sandstone
4. Igneous Rock such as Granite
Answer:
the answer is 1,2
Explanation:
thank you
3. Write Use the space below or write on a piece of paper. What do
you think causes these sparks to form? Write about a time that
you saw sparks, and try to identify the conditions that caused
the sparks.
By thinking, these sparks are produced. In your essay, describe a time when you saw sparks and make an effort to identify the factors that contributed to it.
What is the spark like?
Spark perfectly encapsulates an user's character and desired mode of interaction with the outside world. Happiness and optimism are spread by sparks. To produce an instantaneous electrostatic force known as just an electric spark, a sufficiently strong electromagnetic current must establish an electrically conducting conduit through a typically insulating medium, typically air as well as other gases or gas mixtures.
How do combinations work?When two or more compounds combine to create a single new substance, this reaction is called a combination reaction.
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what is energy?
(in your own words but keep it short)
Answer:
The capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, etc.
A. argon
B. potassium
C. non of these
D. calcium
someone please help me
Answer:
The correct answer is - potassium.
Explanation:
Electron configuration is the representation of the distribution or arrangement of electrons in orbital shells and subshells of a particular atom. IN this question the given electron configuration is -
1s^22s^22p^63s^23p^64s^1
By the configuration, it is clear that it belongs to
- the s group as the last electron is n s orbital and
- only 1 electron which means it belongs to group 1 in the periodic table
- last orbital is 4 so it is from the 4th period
- total electron = 19
Thus, the correct answer is - Potassium or K.
Please help me on the following questions;
How many moles are found in 2.06 x 10^23 molecules of carbon monoxide?
How many moles are found in 8.70 x 10^25 atoms of Zinc?
How many moles are found in 1.44 x 10^22 formula units of salt?
How many moles are found in 3.00 x 10^23 atoms of krypton?
Answer:
0.342 moles
145 moles
0.0239 moles
0.498 moles
Explanation:
To solve this you only need to follow this rule:
N = n x Na. For solving this questions, you just need to divide this values for Avogadro's Coasting, and it's done. Hope it helped!
Cu + 2 AgNO3 Cu(NO3)2 + 2 Ag
How many grams of silver nitrate can be formed from 29 grams of silver?
Answer:
the answer is "a" took the test
Explanation:
The data below compares two different cells, Cell A and Cell B.
Cell A
Cell B
1. Has a cell membrane
2. Is oval-shaped
3. Has a nucleus
1. Has a cell membrane
2. Is spindle-shaped
3. Has a nucleus
What can you conclude about both cells from the comparison?
a
Cell A is a prokaryotic and Cell B is a eukaryotic cell.
Both are eukaryotic cells.
Both are prokaryotic cells.
Cell A is a eukaryotic and Cell B is a prokaryotic cell.
Answer:
both are eukaryotic
Explanation:
both has nucleus so
what is the name of the compound that forms when aluminum and Thiocyanate combine? 
Answer:
The correct answer is - Aluminum Thiocyanate.
Explanation:
When aluminum and thiocyanate combine the new compound form, is called Aluminum Thiocyanate. Al(SCN)3 is the chemical formula that represents this Aluminum Thiocyanate compound.
This compound is formed by a synthesis reaction where aluminum is combined with thiocyanate:
Al3 + 9 SCN = 3 Al(SCN)3
Thus, the correct answer is - the name of the compound is Aluminum Thiocyanate.
At which temperature could air hold the most water vaper?
Answer: 80 degrees F
Explanation:
Science help me now
Answer:
but were is the answer
Explanation:
i am so confuesed
Why do plants need sunlight for photosynthesis?
Explanation: Plants using photosynthesis will take in carbon dioxide from the air, bring up water from the roots, and use sunlight as the energetic source to create sugar from water and carbon dioxide. Plants contain a molecule called chlorophyll, and the chlorophyll is what absorbs the sunlight
Two properties of non-metallic elements and their
atoms are as follows.
property 1 has an oxide that can form a strong
acid in water
property 2 has no paired 3p electrons
Which properties do phosphorus and sulfur have?
Explanation: Sulphur trioxide forms Sulphur acid with water.
Phosphorus has unpaired electrons in 3p state
3 If methane burns in a poor supply of air it will give carbon monoxide and water instead. See if you can write a balanced equation to show this.
Answer: CH4 + 1,5 O2 ⇒ CO + 2 H2O, then multiply numbers by 2
Explanation: