Answer:
temperature
Explanation:
its in the book
Answer: agitation
Explanation:
Calculate the molecular mass of the element
They give:H=1,AI=27,S=32,0=16,Cu=64,P=31,Mg=24,N=14,Na=23
Answer:
Cu3 (PO4)2
3×64 + 2×(31+ 4×16)
192 + 2×(31+64)
192 + 2×(95)
192+190
=382g
aldosterone plays a primary role in adjustment of ____________ excretion.
what are anibiotcs made of
just interested
Answer:
please mark as brainliest
Explanation:
Any substance that inhibits the growth and replication of a bacterium or kills it outright can be called an antibiotic. Antibiotics are a type of antimicrobial designed to target bacterial infections within (or on) the body. This makes antibiotics subtly different from the other main kinds of antimicrobials widely used today:
Antiseptics are used to sterilise surfaces of living tissue when the risk of infection is high, such as during surgery.
Disinfectants are non-selective antimicrobials, killing a wide range of micro-organisms including bacteria. They are used on non-living surfaces, for example in hospitals.
Of course, bacteria are not the only microbes that can be harmful to us. Fungi and viruses can also be a danger to humans, and they are targeted by antifungals and antivirals, respectively. Only substances that target bacteria are called antibiotics, while the name antimicrobial is an umbrella term for anything that inhibits or kills microbial cells including antibiotics, antifungals, antivirals and chemicals such as antiseptics.
Most antibiotics used today are produced in laboratories, but they are often based on compounds scientists have found in nature. Some microbes, for example, produce substances specifically to kill other nearby bacteria in order to gain an advantage when competing for food, water or other limited resources. However, some microbes only produce antibiotics in the laboratory
Answer:
Antibiotics commonly are produced by soil microorganisms and probably represent a means by which organisms in a complex environment, such as soil, control the growth of competing microorganisms. Microorganisms that produce antibiotics useful in preventing or treating disease include the bacteria and the fungi.
Explanation:
source: trust me bro
A 250. mL sample of oxygen is collected over water at 25 °C and 760.0 torr pressure. What is the partial pressure
of the oxygen? (Vapor pressure of water at 25°C is 23.8 mm Hg)
Answer:The mass of oxygen gas sample collected over water is 0.544 g.
The given parameters;
temperature of the oxygen gas, t = 25 °C
total pressure of the gas, P = 644 torr
volume of the gas, V = 500 mL
vapor pressure = 23.8 torr
molar mass of oxygen gas = 32 g/mol
The number of moles of the gas collected is calculated by using ideal gas equation as follows;
PV = nRT
where;
R is the ideal gas constant = 62.36 L.torr/mol.K
P is the pressure of the gas = 644 torr - 23.8 torr = 620.2 torr
T is the temperature of the gas = 25 + 273 = 298 K
V is the volume of the gas = 500 mL = 0.5 L
The number of moles of the gas is calculated as follows;
The mass of oxygen gas collected is calculated as follows;
m = 0.017 (32 g/mol)
m = 0.544 g
Thus, the mass of oxygen gas sample collected over water is 0.544 g.
Explanation:
The partial pressure of oxygen is; 760.0 torr - 23.8 torr = 736.2 torr.
What is partial pressure?We know that in a mixture of gases, the pressure that is exerted by each gas is called the partial pressure of the mixture.
In this case, we have the total pressure of the mixture as 760.0 torr and the vapor pressure of water as 23.8 mm Hg or 23.8 torr) at that temperature. Hence, the partial pressure of oxygen is; 760.0 torr - 23.8 torr = 736.2 torr.
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How do plants slow down erosion?
They slow down water as it runs downhill.
They speed up water as it runs downhill.
Their roots crack open rocks.
Their roots create new rock.
Answer:
I'm thinking the answer is gonna be it slows it down as it runs down hill
To make hot cocoa on the trip, you will need to boil water. Construct an
explanation that describes how the lower air pressure in the mountains affects
this process.
i need an answer in under an hour pls help
Answer:
the water in the mountains will take longer to boil, because of the higher atmospheric pressu
Fill in the [?]
1.7 km = [?]m
Give your answer in standard form.
Answer: 1.7 km = [1700]m
1.7 × 10^3
Explanation:
Answer:
1700 meters
Explanation: hope it helps.
Given that E°red = -0.40 V for Cd2+/Cd at 25°C, find E° and E for the concentration cell expressed using shorthand notation below.
Cd(s) ∣ Cd2+(1.0 × 10-5 M) ∣∣ Cd2+(0.100 M) ∣ Cd(s)
E° = 0.00 V and E = +0.12 V
E° = 0.00 V and E = +0.24 V
E° = -0.40 V and E = -0.16 V
E° = -0.40 V and E = -0.28 V
From the information in the question, the E° and E for the cell is 0.00 V and 0.12 V.
Using the Nernst equation;
Ecell = E°cell - 0.0592/n log Q
We know that E°cell = 0.00 V since the anode and cathode are both made up of cadmium.
Substituting the given values into the Nernst equation;
Ecell = 0.00 V - 0.0592/2 log (1.0 × 10-5 M/0.100 M)
Ecell = 0.00 V - 0.0296 log(1 × 10^-4)
Ecell = 0.12 V
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What is the acceleration of a 10 kg pushed by a 5N force
Answer:
0.5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{5}{10} = \frac{1}{2} = 0.5 \\ [/tex]
We have the final answer as
0.5 m/s²Hope this helps you
A car starts from rest and accelerates at 2.5m/s^2 for 2s. What is the final velocity of the car
[tex]\begin{gathered}\boxed{\begin{array}{c}\\ {\pmb{\sf{Three \: equation \: of \: motion}}} \\ \\ \sf \star \: v \: = u \: + at \\ \\ \sf \star \: s \: = ut + \: \dfrac{1}{2} \: at^2 \\ \\ \sf \star \: v^2 - u^2 \: = 2as\end{array}}\end{gathered}[/tex]
Calculation :-[tex]\pink{\qquad \pmb{ \sf\longrightarrow v \: = u \: + at}}[/tex]
[tex] \qquad \pmb{\sf \longrightarrow v = 0 + 2.5 \times 2}[/tex]
[tex]\qquad \pmb{ \sf\longrightarrow v = 0 + 5}[/tex]
[tex] \qquad \pmb{\sf \longrightarrow v = 5 \: ms^{-1}}[/tex]
[tex]\qquad \longrightarrow {\pink{\underline{\underline{\pmb{\sf{ Final \: velocity= 5 \: ms^{-1} }}}}}}[/tex]
Henceforth –
The final velocity of the car is 5 m/s▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Cryolite is an ore of aluminium used in the extraction of aluminium from bauxite;
it was found to have 33% sodium, 13% aluminium and 54% fluorine.
Work out the empirical formula.
blank are produced when atoms if the elements in group 7A blank an electron
Answer:
Halide ions are produced when atoms of elements in Group 7A gain an electron.
Explanation:
What would happen if we didn’t have the Milky Way
Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below.
Can you please add a picture of the case??
How to tell if a reaction is exothermic.
Answer:
If the reaction loses heat it is exothermic.
Can anyone please answer questions 3 and 4
I’ll give the brainiest!
Answer:
1.Phenolphthalein
2.Method
a.Use the pipette and pipette filler to add 25 cm 3 of alkali to a clean conical flask.
b.Add a few drops of indicator and put the conical flask on a white tile.
c.Fill the burette with acid and note the starting volume.
d.Slowly add the acid from the burette to the alkali in the conical flask, swirling to mix.
Explanation:
Can someone help me with this chemistry question?
What is the frequency of yellow light, which has a wavelength of 5.56 x 10^-7 m?
O A) 5.40 x 10^14 m/s
O B) 5.40 x 10^14 Hz
O C) 1.85 x 10^15 m/s
O D) 1.85 x 10^15 Hz
The frequency of yellow light, which has a wavelength of 5.56 x 10^-7 m is 5.40 x 10^14 Hz. Therefore, option B is correct.
What do you mean by wavelength ?The distance between identical points (adjacent crests) in adjacent cycles of a waveform signal propagated in space or along a wire is defined as the wavelength. This length is typically specified in wireless systems in meters (m), centimeters (cm), or millimeters (mm) (mm).
The wavelength is the distance between two wave crests, and it is also the distance between two wave troughs. The frequency is measured in cycles per second (Hz) and is the number of vibrations that pass over a given spot in one second (Hertz).
Speed is distance over time, Therefore, v = λ / T.
The frequency, f, is 1/T, so the equation relating wave speed, frequency, and wavelength is v = c / λ .
Given :
Wavelength = 5.56 x 10^-7 m
Frequency = ?
Speed (c) = 3 × 10⁸m/s
v = c / λ
By substituting given values in equation and we get,
v = 3 × 10⁸ / 5.56 x 10^-7
= 5.40 x 10^14
The frequency of yellow light is 5.40 x 10^14.
Thus, option B is correct.
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Which of the following are required for plants to carry out photosynthesis?
Answer:
To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight
Is the following sentence true or false?
The properties of a metal are related to bonds within the metal,
Answer:
True.
Explanation:
In metallic bonds, nuclei of metal atoms line up uniformly and the electrons are delocalized (spread out evenly). Since this allows electrons to move around freely, and electricity is created by the flow of electrons, metals can conduct electricity.
which of the following statements about this reaction is true:
CH4+2O2-->CO2+2H2O+Heat
A. The reaction releases heat.
B. heat is absorbed by the reaction.
C. the reaction consumes water.
D.The reaction releases oxygen.
Explanation:?
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
The Correct statement is ~
A. The reaction releases heatAs we can observe, there's heat in product side of the given equation that shows - In the given reaction heat is released making it an exothermic reaction ~
I hope it helps ¡
[tex]\mathrm{✌TeeNForeveR✌}[/tex]
A student has a sample of ocean water that they take to science class. what steps could be taken to determine to classify the ocean water as a suspension, solution, element, or compound?
A) Examine the pH of the sample. If the pH is exactly neutral, it is a pure substance that is a compound.
B) Evaporate the water. If salt is left behind, the sample is a mixture that can be defined as a solution.
C) Let the sample settle. If the salt settles to the bottom, it is a mixture that is classified as a solution.
D) Observe the diffraction of light as it moved through the sample. If light does not scatter, it is a pure substance that is elemental.
Answer:
A or D because B and C dont make sense
can you write the answer for lot of points
[tex]\\ \sf\longmapsto Work=Force\times Displacement [/tex]
[tex]\\ \sf\longmapsto Force=\dfrac{Work}{Displacement}[/tex]
[tex]\\ \sf\longmapsto Force=\dfrac{2400}{6}[/tex]
[tex]\\ \sf\longmapsto Force=400N[/tex]
Assume that 3.00 grams of HgO was used in this reaction. To determine the number of moles of oxygen gas formed, you need to know the number of moles of HgO reactant was used. What quantity in moles of HgO were used
Taking into account the reaction stoichiometry and the definition of molar mass, the quantity of HgO used is 0.01385 moles and 0.006925 moles of O₂ are formed when 3.00 grams of HgO was used.
In first place, the balanced reaction is:
2 HgO → 2 Hg + O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
HgO: 2 molesHg: 2 molesO₂: 1 moleThe molar mass of the compounds is:
HgO: 216.59 g/moleHg: 200.59 g/moleO₂: 32 g/mole
You know that 3.00 grams of HgO was used. Then, the quantity in moles of HgO used, can be calculated using the molar mass of HgO as follow:
[tex]3 gramsx\frac{1 mole}{216.59 grams}[/tex]= 0.01385 moles
Finally, the quantity of HgO used is 0.01385 moles.
To determine the number of moles of oxygen gas formed, the following rule of three can be applied: if by reaction stoichiometry 2 moles of HgO form 1 mole of O₂, 0.01385 moles of HgO form how many moles of O₂?
[tex]amount of moles of O_{2} =\frac{0.01385 moles of HgOx1 mole of O_{2} }{2 moles of HgO}[/tex]
amount of moles of O₂= 0.006925 moles
Then, 0.006925 moles of O₂ are formed when 3.00 grams of HgO was used.
Learn more:
brainly.com/question/24741074 brainly.com/question/24653699 brainly.com/question/23871710Which is the formula for nitrogen trihydride? NH3 N3H 3NH N3H3
the answer isssssssssssssssssssssss... Nh3.
Answer: A.) NH3
Explanation:
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Which picture correctly shows the path of the reflected light ray?
Select one:
a. A
b. B
c. C
d. D
The picture that correctly shows the path of the reflected light ray is: Picture A.
A ray diagram can be defined as the graphical representation of the possible paths that a light wave takes from one point (source) to another.
Basically, some of the phenomenon and properties associated with light ray include the following:
RefractionDiffractionInterferenceReflectionA reflected light ray completely bounces off a surface and as such, light wave do not pass through the surface as illustrated in Picture A.
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How does vapor pressure affect intermolecular forces.
Answer:
it is directly related to the intermolecular forces present between its molecules
Why can Marco hear the music, even though he is not in the same room as the speaker?
Answer:
Sound Travels
Explanation:
Sound waves can travel, and that makes it so that even though Marco is in a different room, he can hear the music. Depending how loud the music is and how thick the walls car, the sound can travel through the walls.
If Temperature 25 C and volume is 117.5 cm³. Explain volume temperature relationship using Charles’s law.
(No links or else I'll report.
Don't answer if u dont know.)
Thank You.
Explanation:
According to Charles law : V/T=k (constant).
the volume temperature relationship will be
V/T = 117.5/25 = 4.7
hope this helps you.
_ is the process in which an element spontaneously transforms into another isotope of the same element, or into a different element.
Answer:
Nuclear transmutation
Explanation:
The process in which an element spontaneously transforms into another isotope of the same element, or into a different element is called nuclear transumutation. It occurs when the number of protons or neutrons in the nucleus of an atom is changed.
