Answer:
donald trump
Explanation:
Explain the term respiration and how this process increases the percentage of carbon dioxide in the atmosphere.
Answer:
Please find the explanation to this question below.
Explanation:
What the common uses for Rutherfordium???
Answer:
welcome
Explanation:
Uses of Rutherfordium
Because rutherfordium is made within the lab, there are not very many uses for this element commercially. On the other hand, rutherfordium has been used within the laboratory setting to conduct research. Most elements that are highly radioactive are used for nuclear power and medicinal purposes.
Isaiah rolls a tennis ball along the ground. Which of the following best explains what will happen if forces act on the ball?
Answer:
what are the following
Explanation:
what are the options?
Answer:
the ball will stop moving
an example of no chemical reaction occurring
in gizmos
Answer:
Hydrogen + Helium
Explanation:
No reaction occurs
Speed is the rate of change of position expressed as _____ traveled per unit of time. A. direction B. meter C. displacement D. distance... Help!!!
Answer:
Distance
Explanation:
Researchers are studying a fish population in a small pond that has algae as the only producer in the ecosystem. The scientists are concerned about what might happen to the fish, if the algae suddenly disappear. Why is this a concern? What might be done to prevent this from occurring?
Explanation:
Algae is a group of a photosynthetic eukaryotic organisms that plays a very important role on the ecosystem. It forms the lower base of the food chain and supports all the life forms of the ecosystem. It takes up water and carbon dioxide from the atmosphere to prepare food during the process of photosynthesis and maintains a balance in the ecosystem.
In the context, if the algae disappears, the fish might die as the small fishes feeds on this algae. This is a concern as the algae is main component of food source and forms the base of the food chain. If there will be no algae there will be no life form on earth, as all species depend on each other to survive.
In order to prevent this from occurring, we must protect our algae. We must plant more trees, keep our water bodies healthy, we should not litter our ponds and lakes. We should also help these algae to grow and survive so that other life forms can feed them and thus maintain the ecosystem.
____ occurs when the vapor pressure of a liquid is equal to the external atmospheric pressure.
Answer:
c
Explanation:
boiling
Convert 15.75 grams of Magnesium to atoms.
Answer: [tex]3.903\times 10^{23}[/tex]
Explanation:
Given
Mass of magnesium is [tex]m=15.75\ gm[/tex]
The molar mass of magnesium [tex]M=24.3\ g/mol[/tex]
No of moles in 15.75 g of magnesium is
[tex]\Rightarrow n=\dfrac{15.75}{24.3}\\\\\Rightarrow n=0.648\ \text{moles}[/tex]
1 mole contains [tex]6.022\times 10^{23}[/tex] atoms
So, 0.648 moles contain [tex]0.648\times 6.022\times 10^{23}[/tex]
[tex]=3.903\times 10^{23}\ \text{atoms}[/tex]
How many grams of sucrose will I add to the water (0.100 L) in order to make the 3 molal solution.
Answer:
mass = 102.69 g of sucrose
Explanation:
First, you need to use the correct expression of molality (m) which is the following:
m = moles / kg solvent (1)
According to the exercise, we need to get the grams, in other words, the mass of the sucrose. To get the mass, we need the moles and molecular weight of sucrose and use the following expression:
moles = mass / MM (2)
Now, if we replace (2) in (1) we have:
m = mass / MM * kg solvent (3)
From here, we solve for the mass and then:
mass = m * MM * kg solvent (4)
Now, then density of water is 1 kg/L, so, the volume of the water will be the same as it's mass, and the molality is 3 m. The molecular weight of the sucrose is (according to several sources) 342.3 g/mol. Replacing all the data in (4) we have:
mass = 3 mol/kg * 0.1 kg * 342.3 g/mol
mass = 102.69 g of sucroseHope this helps
What is the difference between an imprint and an impression?
Answer:
As nouns the difference between impression and imprint
is that impression is the indentation or depression made by the pressure of one object on or into another while imprint is an impression; the mark left behind by printing something.
The term imprint is defined as to mark by or as if by pressure and the term impression is defined as the effect produced by impressing.
What is the difference between an imprint and an impression?The difference between an imprint and an impression is that the imprint is the mark left behind when anything is printed, whereas the impression is the indentation or depression caused by the pressure of one object against or into another.
While a shoe won't make an impression in loose sand, it will on a hard surface like concrete or linoleum. These imprints or impressions might be contrasted with the shoe of a suspect or the tire of a car to see if they belong to the same object.
Thus, The term imprint is defined as to mark by or as if by pressure and the term impression is defined as the effect produced by impressing.
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An aqueous solution has a hydroxide-ion concentration of 1.0x10^-3M. What is the pH of the solution?
a.11
b.3
c.-3
d.7
Moseley discovered that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing
Moseley discovered that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing
" Atomic number "
1.
Events in which molten rock spews out of
the mantle as ash, lava, and gases
Answer:
Landslides, Volcanoes, Earthquakes, and Floods. A opening in the Earth's surface through which melted rock, gases, and ash escape. Events in which molten rock spews out from the mantle to the surface of Earth as ash, lava, and gases
Explanation:
One of the main components of an airbag is the gas that fills it. As part of the design process, you need to determine the exact amount of nitrogen that should be produced. Calculate the number of moles of nitrogen required to fill the airbag. Show your work. Assume that the nitrogen produced by the chemical reaction is at a temperature of 495°C and that nitrogen gas behaves like an ideal gas. Use this fact sheet to review the ideal gas law.
The number of moles of the gas is 0.016 moles
What is the airbag reaction?We know that in the airbag, nitrogen gas is obtained by the decomposition of sodium azide as follows; 2NaN3 -----> 2Na + 3N2
Since it is under ideal conditions;
P = 1 atm
V = 1 L
T = 495°C or 768 K
n = ?
R = 0.082 atm LK-1mol-1
From;
PV= nRT
n = PV/RT
n = 1 atm * 1 L/ 0.082 atm LK-1mol-1 * 768 K
n = 0.016 moles
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thermal conductors what
Ice converts into water by absorbing heat. Explain
Here heat is absorbed to break the crystalline nature of ice and to make well separation between water molecules.
Explanation:
Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature. ... Ice cubes melting as their temperature rises. During melting, the ice absorbs latent heat, which is used to change the state of the water from ice to liquid water.
A sample of sulfur dioxide occupies a volume of 6052 mL at 352 K and 892 mm Hg. What volume will the sulfur dioxide occupy at STP?
Answer:
5511.99 mL
Explanation:
Given data
Volume V1= 6052 mL
Temperature T1= 352K
Pressure P1= 892 mm Hg
At STP the parameters of gas are
Temperature T2= 273.15 K
Pressure P2= 760 mmHg
Applying the gas equation
P1V1/T1= P2V2/T2
Substitute to find V2 we have
892*6052/352= 760*V2/273.15
5398384/352= 760*V2/273.15
15336.31= 760*V2/273.15
Cross multiply
15336.31*273.15= 760*V2
4189113.0765= 760*V2
4189113.0765/760= V2
V2= 5511.99 mL
Hence the volume at STP is 5511.99 mL
are the bonds of OCl2 polar?
Answer: OCl2 is polar because the two O-Cl bond dipoles don't cancel each other.
This graph represents an endothermic reaction. What does it show about the potential energy of reactants and products? Abuzua nunuad in Reaction progress A. The comparison of potential energy depends on what the reactants and products are, B. The potential energy of the products is greater than the potential energy of the reactants C. The potential energy of the reactants equals the potential energy of the products D. The potential energy of the reactants is greater than the potential energy of the products,
Answer:
The potential energy of the products is greater than the potential energy of the reactants
Explanation:
i just took the test
In an endothermic reaction, activation potential energy of reactants is less than that of the products. Reactants in endothermic reaction are absorbing enough heat energy to overcome this barrier potential. Hence, option B is correct.
What is an endothermic reaction?An endothermic reaction is the one in which heat energy is absorbed by the reactants from the surroundings. In endothermic reactions, the enthalpy change is positive.
The minimum energy that the reactants have to acquire for effective collision and reaction is called the activation energy. By absorbing heat energy reactants becomes more energetic and overcome this activation potential.
Therefore, in an endothermic reaction, the activation potential of products will be higher than that of the reactants and the energy diagram clearly exhibit this transition in energy. Hence, option B is correct.
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When first mixed, concrete can be described as (Blank)
, which means it can take the shape
of the formwork provided.
Somebody look at all the science questions i posted plzzz help ( i will give brainliest
Answer:
ok
Explanation:
what scientific term is uses to refer to the sharing of electrons between/ among atoms in order for the to attain stability?
Answer:
Covalent bonds
Explanation:
Covalent bonding
Covalent bond refers to mutual sharing of electrons between two atoms
The extraction of zinc from zinc blend and explain how the zinc oxide be reduced using Carbon monoxide Electrolysis
Answer:
Zinc blend is Zinc sulphide, ZnS.
ZnS is roasted in air producing ZnO and Sulphur dioxide.
ZnO is reduced to Zn by CO.
Further purification is done by electrolysis.
The pH of a solution with a Hydronium (H30+) ion concentration of 0.001M is
Answer:
The pH of a solution with a Hydronium (H₃O⁺) ion concentration of 0.001 M is 3.
Explanation:
pH, short for Hydrogen Potential, is a measure used to establish the level of acidity or alkalinity of a solution.
pH indicates the amount of hydrogen ions present in a solution or substance. Mathematically the pH is the negative logarithm of the molar concentration of hydrogen ions or protons (H⁺) or hydronium ions (H₃O⁺).
pH= - log [H⁺]= - log [H₃O⁺]
The pH scale goes from 0 to 14. Values less than 7 indicate the range of acidity and those greater than 7 indicate alkalinity or basicity. The value 7 is considered neutral.
In this case, [H₃O⁺]= 0.001 M.
Replacing in the definition of pH:
pH= - log (0.001 M)
Solving:
pH= 3
The pH of a solution with a Hydronium (H₃O⁺) ion concentration of 0.001 M is 3.
Review the chart of all the domesticated rabbits. The different types of rabbits are listed by their scientific names. If you were a
rabbit breeder, which rabbits could you breed to produce fertile offspring? Explain.
A)
All of the rabbits listed. They are all rabbits.
B)
None of these rabbits. They are all different species.
C)
Any of the cottontail rabbits They are the same species.
D)
Any of the rabbits on the same branch in the chart because that means
they are closely related.
Answer: None of these rabbits listed. they are all different species
Explanation:
I got it right on usatestprep
What is the ph of H2?
Answer:
Hydrogen ion concentration is more conveniently expressed as pH, which is the logarithm of the reciprocal of the hydrogen ion concentration in gram moles per liter. Thus, in a neutral solution the hydrogen ion (H+) and the hydroxyl ion (OH−) concentrations are equal, and each is equal to 10−7. A pH of 7 is neutral
In P plants the gene for the color of the sea has two alleys in the punnets square show me love the dominant alley Y represents yellow and recessive alley Y represents green based on the punnets square what percentage of offspring would be expected to have a green seeds
Answer:
25%.
Explanation:
In the F1 generation, the yellow colour is dominant so 75% of the seeds are yellow colour while on the other hand, 25% seeds are green in colour due to recessive allele. In the F1 generation, the ratio of dominant to recessive allele is 3:1. So on the basis of this 3:1 ratio we can say that there is 75% of yellow colour seeds and 25% of green colour seeds in the population of F1 generation.
When solid water changes directly to water vapor without first becoming a liquid, the process is called?
Sublimation. Sublimation is the change of a solid direct to gas or vapour without becoming liquid
which do you think will warm up the plate more quickly?
A. Direct sunlight
B.Indirect sunlight
Answer: B
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Put these events in order.
= Your phone contacts a base station in a cell.
= Once connected, a duplex system allows you to talk to the other person at the same time.
= You dial a number on your cell phone.
The MTSO then connects you to the other device.
= A base station contacts the Mobile Telephone Switching Office (MTSO).
Answer:
You dial a number on your phone
Your phone contacts a base station
The base station contacts the MTSO
The MTSO connects you to the other device
You talk to the person on the other device.