Answer:
Pulmonary oedema can be caused by lung disease, but when heart failure is more serious, the pressure of blood in the lungs builds-up, pushing fluid into the air sacs. This is how heart failure can lead to respiratory failure. People with pulmonary oedema will feel breathless, weak and unwell.
The name for the process that causes fertile land to become dirt-like is??
Deforestation
Urbanization
Construction
Desertification
Answer:
Desertification?
Explanation:
Desertification is when fertile lands become desert like
A 45.2 g sample of Silver at 101.0 ºC is dropped into 300.0 g of water at 30.6 ºC. What is the final temperature of the water?
Answer:
Final temperature of water = 31.2° C
Explanation:
Let the final temperature of water be T degrees
Concept: By energy conservation law
Heat lost by the silver = heat gained by water
Heat lost be silver Q1 = m1c1ΔT1
Q1 = 45.2/1000Kg×2.36J/KgK×(101-T)
Heat gained by water Q2 = m2c2ΔT2
Q2 = 300/1000Kg×4.186J/KgK(T-30.6)
Since, Q1=Q2
⇒ 45.2/1000Kg×2.36J/KgK×(101-T) = 300/1000Kg×4.186J/KgK(T-30.6)
Solving we get T = 31.2° C
Therefore, final temperature of water = 31.2° C
1.Peptide bond formation is accomplished as the amine nitrogen of the an-tRNA in the ____ carries out a _____ of the amino acid bound to the _____. a.A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site b.P site, nucleophilic attack on the carbonyl carbon, tRNA of the A site c.A site, acidophilic attack on the carbonyl carbon, tRNA of the P site d.A site, electrophilic attack on the carbonyl carbon, tRNA of the P site e.P site, electrophilic attack on the carbonyl carbon, tRNA of the A site
Answer:
A
Explanation:
A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site
A rarefraction is generated when particles move
A:together
B.closer
C.under
D.apart
When a solute is added to water, the boiling point
Answer:
Boiling-point elevation describes the phenomenon that the boiling point of a liquid (a solvent) will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent. This happens whenever a non-volatile solute, such as a salt, is added to a pure solvent, such as water.
what does molecule mean?
a.) A pure substance, only one type of atom
b.) Two or more atoms held together by chemical bonds
c.)Composed of two or more separate elements
d.)The smallest part of matter still retaining chemical properties
A pure substance, only one type of atom
Answer:
(a) a pure substance, only one type of atom
On a hot day, a 15.0 kg window increased from 20.0 degrees C to 26.7 degrees C. How much heat energy did the glass window absorb? (specific heat of glass = 0.840 J/gC)
Answer: The heat energy absorbed by the glass window is 84420 J.
Explanation:
Given: Mass = 15.0 kg (1 kg = 1000 g) = 15000 g
Specific heat capacity = [tex]0.840^{o}C[/tex]
Initial temperature = [tex]20^{o}C[/tex]
Final temperature = [tex]26.7^{o}C[/tex]
Formula used to calculate 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 capacity
[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})\\= 15000 g \times 0.840J/g^{o}C \times (26.7 - 20.0)^{o}C\\= 84420 J[/tex]
Thus, we can conclude that heat energy absorbed by the glass window is 84420J.
Mark drove 14 miles EAST and then 23 miles WEST. His displacement from where he started would be
Answer:
9 miles west
Explanation:
hope this helps
What is the molarity of a solution made of 2.45 moles of LiCl in 4.75 L of solution?
Answer:
.52 M
Explanation:
moles ÷ liters = molarity
2.45 ÷ 4.75 = 0.5157894737
rounding it = .52
If the half-life of a radioactive substance is 500 million years and you have 48 atoms of it, how many half-lives will have passed by the time that 6 atoms of the substance remain?
O A. 3
O B. 2
O C. 4
O D. 5
Answer: 3
Explanation:
A compound contains 1.2 g of carbon, 3.2 g of oxygen and 0.2g of hydrogen. Find the formula of the compound
Answer:
The empirical formula of the compound is [tex]C_{0.504}HO_{1.008}[/tex].
Explanation:
We need to determine the empirical formula in its simplest form, where hydrogen ([tex]H[/tex]) is scaled up to a mole, since it has the molar mass, and both carbon ([tex]C[/tex]) and oxygen ([tex]O[/tex]) are also scaled up in the same magnitude. The empirical formula is of the form:
[tex]C_{x}HO_{y}[/tex]
Where [tex]x[/tex], [tex]y[/tex] are the number of moles of the carbon and oxygen, respectively.
The scale factor ([tex]r[/tex]), no unit, is calculated by the following formula:
[tex]r = \frac{M_{H}}{m_{H}}[/tex] (1)
Where:
[tex]m_{H}[/tex] - Mass of hydrogen, in grams.
[tex]M_{H}[/tex] - Molar mass of hydrogen, in grams per mole.
If we know that [tex]M_{H} = 1.008\,\frac{g}{mol}[/tex] and [tex]m_{H} = 0.2\,g[/tex], then the scale factor is:
[tex]r = \frac{1.008}{0.2}[/tex]
[tex]r = 5.04[/tex]
The molar masses of carbon ([tex]M_{C}[/tex]) and oxygen ([tex]M_{O}[/tex]) are [tex]12.011\,\frac{g}{mol}[/tex] and [tex]15.999\,\frac{g}{mol}[/tex], then, the respective numbers of moles are: ([tex]r = 5.04[/tex], [tex]m_{C} = 1.2\,g[/tex], [tex]m_{O} = 3.2\,g[/tex])
Carbon
[tex]n_{C} = \frac{r\cdot m_{C}}{M_{C}}[/tex] (2)
[tex]n_{C} = \frac{(5.04)\cdot (1.2\,g)}{12.011\,\frac{g}{mol} }[/tex]
[tex]n_{C} = 0.504\,moles[/tex]
Oxygen
[tex]n_{O} = \frac{r\cdot m_{O}}{M_{O}}[/tex] (3)
[tex]n_{O} = \frac{(5.04)\cdot (3.2\,g)}{15.999\,\frac{g}{mol} }[/tex]
[tex]n_{O} = 1.008\,moles[/tex]
Hence, the empirical formula of the compound is [tex]C_{0.504}HO_{1.008}[/tex].
Which of the following can be used to measure an object's
speed?
Answer:
distance traveled divided by the time it traveled
Explanation
this is just an equation for how to find speed. you can also just use like a meterstick and a stopwatch
What is caffeine atomic number?
No links
Answer:
Caffeine has no atomic number
Explanation:
Caffeine is a compound, not an element. Therefore it cannot have an atomic number.
If 10.5 g of iron, at 25°C, absorbs 128 J of heat, what will be the final temperature of metal? (The specific heat of iron is 0.449 J g-1 °C-1)
Answer:
27.5°C = Final Temperature of the metal
Explanation:
The change in temperature using the specific heat of a material could be obtained using the formula:
Q = m*S*ΔT
Where Q is heat absorbed in Joules = 128J in the problem
m is the mass of the substance = 10.5g
S is Specific Heat of the substance = 0.449J/g°C for Iron
ΔT is change in temperature = Final T - Initial T
Replacing:
128J = 10.5g*0.449J/g°C*ΔT
2.5°C = ΔT
2.5°C = Final T - 25°C
27.5°C = Final Temperature of the metal
Mention any two uses of oxygen gas.
Answer:
steel, plastics
Explanation:Hope it helps!
What is the number of moles of Sodium Chloride (NaCl) that is present in 29.22g sample of it?
Answer:
[tex]\boxed {\boxed {\sf 0.5000 \ mol \ NaCl}}[/tex]
Explanation:
We are asked to convert grams to moles. We must use the molar mass or the grams in 1 mole of a substance. These values are found on the Periodic Table as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu).
We are given the compound sodium chloride or NaCl. Look up the molar masses of the individual elements.
Na: 22.9897693 g/mol Cl: 35.45 g/molThe formula for the compound does not contain any subscripts, so there is 1 mole of each element in 1 mole of the compound. Add the molar masses together to find sodium chloride's molar mass.
NaCl: 22.9897693 + 35.45= 58.4397693 g/molNow we can use the molar mass to create a ratio. We know there are 58.4397693 grams of NaCl in 1 mole of NaCl.
[tex]\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]
Multiply by the number of grams provided in the problem: 29.22
[tex]29.22 \ g\ NaCl*\frac {58.4397693 \ g \ NaCl}{ 1 \ mol \ NaCl}[/tex]
Flip the ratio so the units of grams of NaCl cancel.
[tex]29.22 \ g\ NaCl*\frac { 1 \ mol \ NaCl}{58.4397693 \ g \ NaCl}[/tex]
[tex]29.22*\frac { 1 \ mol \ NaCl}{58.4397693}[/tex]
[tex]\frac {29.22}{58.4397693} \ mol \ NaCl[/tex]
[tex]0.5000019738 \ mol \ NaCl[/tex]
The original measurement of grams has 4 significant figures, so our answer must have the same. For our answer, that is the ten-thousandth place. The 0 to the right of this place (0.5000019738) tells us to leave the 0 in the ten-thousandth place.
[tex]0.5000 \ mol \ NaCl[/tex]
There are approximately 0.5000 moles of sodium chloride in a 29.22 gram sample of sodium chloride.
what is the chemical formula for zinc?
the 3 factors that affect the process of Natural Selection
Answer:
Overproduction of Offspring. The first of these factors that must be present in order for Natural Selection to occur is the ability of a population to overproduce offspring.
Variation.
Selection.
Reproduction of Adaptations.
Explanation:
Find the number of grams in 16.95 mol hydrogen peroxide (H2O2). Round your
answer to two decimal places and be sure to include the proper units.
Answer: There are 576.46 number of grams present in 16.95 mol hydrogen peroxide [tex](H_{2}O_{2})[/tex].
Explanation:
Number of moles is defined as the mass of substance divided by its molar mass.
The molar mass of [tex]H_{2}O_{2}[/tex] is 34.01 g/mol. Hence, mass of hydrogen peroxide present in 16.95 moles is calculated as follows.
[tex]Moles = \frac{mass}{molarmass}\\16.95 mol = \frac{mass}{34.01 g/mol}\\mass = 576.46 g[/tex]
Thus, we can conclude that there are 576.46 number of grams present in 16.95 mol hydrogen peroxide [tex](H_{2}O_{2})[/tex].
HURRY PLEASE
What volume is occupied by 3.12 moles of a gas when the pressure is 88.4 kPa at a temperature of 19℃?
Answer:
The Combined Gas Law shows that the pressure of a gas is inversely proportional to volume and directly proportional to temperature. Avogadro's Law shows that volume or pressure is directly proportional to the number of moles of gas. Putting these together leaves us with the following equation:
P1×V1T1×n1=P2×V2T2×n2(11.9.1)
As with the other gas laws, we can also say that (P×V)(T×n) is equal to a constant. The constant can be evaluated provided that the gas being described is considered to be ideal.
The Ideal Gas Law is a single equation which relates the pressure, volume, temperature, and number of moles of an ideal gas. If we substitute in the variable R for the constant, the equation becomes:
P×VT×n=R(11.9.2)
The Ideal Gas Law is conveniently rearranged to look this way, with the multiplication signs omitted:
PV=nRT(11.9.3)
The variable R in the equation is called the ideal gas constant.
Explanation:
On a hot day, a 15.0 kg window increased from 20.0 degrees C to 26.7 degrees C. How much heat energy did the glass window absorb? (specific heat of glass = 0.840 J/gC)
Answer: The heat energy absorbed by glass window is 84420 J.
Explanation:
Given: Mass = 15 kg (1 kg = 1000 g) = 15000 g
Initial temperature = [tex]20^{o}C[/tex]
Final temperature = [tex]26.7^{o}C[/tex]
Specific heat capacity = [tex]0.840 J/g^{o}C[/tex]
Formula used 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 capacity
[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})\\ q = 15000 g \times 0.840 J/g^{o}C \times (26.7 - 20)^{o}C\\q = 84420 J[/tex]
Thus, we can conclude that the heat energy absorbed by glass window is 84420 J.
What is the pH of a solution that contains 0.009 grams of oxalic acid in 100
mL of water?
Answer:
pH = 3.0 ya that's it......
18.2L of gas at 95°C and 760 torr is placed in a 15L container at 80 degrees * C ; what is the new pressure ?
Answer:
884.56 torr
Explanation:
Formula: [tex]\frac{P_{1}V_{1} }{T_{1}} = \frac{P_{2}V_{2} }{T_{2}}[/tex]
P = Pressure
V = Volume
T = Temperature in kelvin (Celsius + 273.15)
[tex]\frac{(760)(18.2) }{368.15} = \frac{P(15) }{353.15}[/tex]
[tex]P = \frac{(760)(18.2)(353.15) }{(368.15)(15)}[/tex]
P = 884.56169
Bacteria live on skin of humans. The bacteria receive food and shelter form human beings. Most bacteria are harmless and pose little or no threat to humans. This is an example of
Answer: symbiotic relationship
Explanation:
21. An object appears blue when seen in sunlight. The same object is illuminated by a mixture of equally bright red and green light. It is also viewed through a blue filter. What color does the object appear to be? A. Blue B. Cyan C. Black D. Green
Answer: Green.
Explanation: Because object appears to be blue in sunlight, it absorbs counter colour of blue, also orange-red colour. So, when illuminated with
red-green colour, red light is more absorbed and object appears to be green.
A cylinder of hot gas with pressure of 2.81 atm is at 371°C. It is then
cooled to 85°C. What is the gas pressure at the lower temperature?
Help
Answer: 3.38 Atm is the partial ressure of each gas
What is the name of this hydrocarbon?
Answer:
2,3-dimetylpentane
Explanation:
.....................
7. Which type of electromagnetic radiation can be dangerous to living things?
a. Radio waves
b. Visible light
c. Gamma rays
What can you say about the forces between the particles of these gases)
Answer:
Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other. In most cases, there are essentially no attractive forces between particles.
Explanation:hopes this helps:)
what is chemical bonding?
Answer:
Chemical bonding - a mutual adhesion of atoms in an molecule and the crystal lattice.
Explanation:
Hope you have a great day