Answer:
Explanation:
whats the qustion?
Photosynthesis in a plant is an example of which characteristic of living things?
1. Reproduction
2. Response to the environment
3. Growth and development
4. Ability to obtain and use energy
Answer:
4. Ability to obtain and use energyA net force of 66 newtons accelerates a child at 2.0 m/s? down a smooth playground slide. What is the mass of the
child?
A 130 kg
B68 kg
© 64 kg
D 33 kg
Answer:The answer is D 33
Explanation:
The mass of the child accelerating at 2 m/s² by a net force of 66 N is 33 Kg (Option D)
Relationship between force and accelerationForce is related to acceleration according to the following equation
Force (F) = mass (m) × acceleration (a)
F = ma
With the above formula, we can obtain the mass of the child
How to determine the mass of the child Acceleration (a) = 2 m/s²Force (F) = 66 NMass (m) =?F = ma
66 = m × 2
Divide both side by 2
m = 66 / 2
m = 33 Kg
Thus, the mass of the child is 33 Kg
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Which characteristics do hookworms and tapeworms share? Check all that apply.
They are types of roundworms.
They are parasitic.
They have a digestive system.
They cause diseases in humans.
They have nerve cells.
They can be used to treat illnesses.
Answer:
b,d,e
Explanation:
2 moles KCl + 3 moles O2 → 2moles KCIO3
Calculate the number of particles of each substance based on the number of moles from the balanced equation
Answer:
KCl ⇒ 1.205x10²⁴ molecules
O₂ ⇒ 1.807x10²⁴ molecules
KClO₃ ⇒ 1.205x10²⁴ molecules
Explanation:
In order to calculate the number of particles from the number of moles, we have to use Avogadro's number, which states the number of particles in one mol:
In 1 mol there are 6.023x10²³ particles (ions, molecules or atoms).So now we multiply the number of moles of each substance by Avogadro's number:
KCl ⇒ 2 mol * 6.023x10²³ molecules/mol = 1.205x10²⁴ moleculesO₂ ⇒ 3 mol * 6.023x10²³ molecules/mol = 1.807x10²⁴ moleculesKClO₃ ⇒ 2 mol * 6.023x10²³ molecules/mol = 1.205x10²⁴ moleculesA rigid container of O 2 has a pressure of 340 kPa at a temperature of 713 K. What is the pressure at 273°C ?
Answer:
260 kPa
Explanation:
To answer this problem we can use Gay-Lussac's law, which states that at a constant volume (such as is the case with a rigid container):
P₁T₂=P₂T₁Where in this case:
P₁ = 340 kPaT₂ = 273 °C ⇒ 273 + 273.16 = 546 KP₂ = ?T₁ = 713 KWe input the data:
340 kPa * 546 K = P₂ * 713 KAnd solve for P₂:
P₂ = 260 kPaMatch each energy type with the source it uses.
Solar
?
Nuclear reactions
Hydropower
?
Moving water
Geothermal
?
Sun's rays
Biomass
?
Plants
ASAP HELL
The energy exists in many different forms. Each form of energy can be converted or changed into the other forms. The geothermal energy denotes the thermal energy.
What is solar energy?The energy produced from the sun is called the solar energy. The heat and light which come from the sun is the solar energy. The solar energy play an important role in reducing the emissions of green house gases and also control the climate change.
The biomass is known as the fuel obtained from the organic matter waste of the living organisms such as plant waste, animal waste and municipal wastes. It is the fuel developed from plants.
The hydropower is the largest source of renewable energy which uses the moving water to produce electricity. The energy which is generated from the heat within the earth is called the Geothermal energy.
Thus,
Solar - sun's rays
Moving water - Hydropower
Plants - Biomass
Nuclear reactions - Geothermal
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What is the molarity of a 3.00 L solution that contains 0.400 mol FeCl3?
1.20 M
0.266 M
7.50 M
0.133 M
Answer: 0.133 mol/l
Explanation: molality = concentration = 0.400 mol/3.0 l
A ___________________________ is a mixture in which the properties of thesubstances are spread evenly.
Answer:
homogenous mixture
Explanation:
What do you call the reaction between magnesium hydroxide and hydrochloric acid?
Answer:
neutralization reaction
The neutralization reaction is the reaction between Mg(OH)2 (a weak base) and HCl (a strong acid).
Explanation:
What problems might there be if oxygen was very soluble in water?
Water can dissolve oxygen gas. The oxygen that is dissolved in water is used for respiration by plants and animals that dwell in water. Therefore, oxygen gas that has been dissolved in water is crucial for the survival of aquatic creatures and plants.
What is respiration ?During respiration, carbon dioxide is expelled in the opposite direction, back into the environment, while oxygen is moved from the outside environment to the cells within tissues.
The oxygen molecules become trapped between the open spaces between the water molecules as a result of the creation of hydrogen bonds. Water is a polar solvent, as is well known.
Additionally, the oxygen molecules have pi-electrons, which give them a certain amount of polarity because they are sensitive to polar environments.
The majority of aquatic creatures need oxygen for respiration, and our aquatic ecosystems are at risk if there is an oxygen shortage in the water.
Thus, The oxygen that is dissolved in water is used for respiration by plants and animals that dwell in water.
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What is the key difference between a liquid and a gas?
Answer:
What is the key difference between gases and liquids? EZZZZZ. The particles in a liquid are attracted to one another; the particles in a gas *are not attracted *.
Explanation:
When a nonmetal gains electrons, it becomes this type of ion.
Answer:
When these atoms gain electrons, they acquire a negative charge because they now possess more electrons than protons. Negatively charged ions are called anions. Most nonmetals become anions when they make ionic compounds. A neutral chlorine atom has seven electrons in its outermost shell.
Explanation:
Hope this helps!
igneous sedimentary, and metamorphic rocks are found at the same cliff side.Which statement is correct?
Answer:
The metamorphic rock and sedimentary rock were already at this location and magma flowed into other rocks
Explanation:
group of adjacent nucleic acids are a. phosphodiester bond b. peptide bonds c. lnoic bond d. covalent bonds
Answer: A. Phosphodiester bond.
Explanation: "A phosphodiester bond occurs when exactly two of the hydroxyl groups in phosphoric acid react with hydroxyl groups on other molecules to form two ester bonds. Phosphodiester bonds are central to all life on Earth as they make up the backbone of the strands of nucleic acid."
"The nucleotides in DNA and RNA have three components: a sugar group, a nitrogenous base, and a phosphate group. Adjacent nucleotides in a nucleic acid are joined by a phosphodiester bond."
do liquids have a higher molecular attraction
Info gathered by site below:
Liquids
denser than gases
have a definite volume
attractive forces not strong enough to keep molecules from moving allowing liquids to hold shape of container
Thanks to:
Source: https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/11%3A_Liquids_and_Intermolecular_Forces/11.S%3A_Liquids_and_Intermolecular_Forces_(Summary)
So dont thank me. thank the website.
What is the percent composition HCN?
Answer:
see calculations in explanation
Explanation:
percent = part/total x 100%
part = ∑ atomic mass of element
hydrogen = 1.008 amu (atomic mass units)carbon = 12.011 amunitrogen = 14.007 amutotal = ∑ molecular mass of compound
= H amu + C amu + Namu
= 1.008 amu + 12.011 amu + 14.007 amu
= 27.026 amu
%H = (1.008amu/27.026amu)100% = 3.730%
%C = (12.011amu/27.026amu)100% = 44.442%
%N = (14.007amu/27.026amu)100% = 51.827%
Check results ∑%values = 100%
3.730% + 44.442% + 51.827% = 99.999% ≅ 100%
(giving brainiest)
please answer correctly im failing school and these are my last points!
Answer:
i answered your other post with it
Explanation:
(giving brainiest)
tell how you solved the question
QWERTYUIOPASDFGHJKLZXCVBNM
why does a mole of silicon weigh a different amount than a mole of carbon?
Answer:
[tex]\boxed {\boxed {\sf Different \ amount \ of \ protons, neutrons, \ and \ electrons}}[/tex]
Explanation:
Remember that a mole is equal to Avogadro's number: 6.022*10²³ atoms. Also, remember that an atom is made up of protons, neutrons, and electrons. Each element has a different amount of each.
If an element has more of these particles in 1 atom, then the atomic mass will be greater, ultimately making the molar mass (mass of 1 mole) greater.
Silicon has 14 protons, electrons, and neutrons, making its atomic mass 28.085 amu and its molar mass 28.085 grams. However, carbon only has 6 of each particle, so its atomic mass is smaller at 12.011 amu and molar mass is 12.011 grams.
Valence electrons in an atom are those that are...
*
a polygon with four equal sides ands angle
150. g of aluminum chloride in 0.450 liters of solution, what is the concentration? (any examples are helpful, thank you)
Answer:
2.49 M
Explanation:
Step 1: Given data
Mass of AlCl₃: 150. gVolume of solution: 0.450 LStep 2: Calculate the moles AlCl₃ (solute)
The molar mass of AlCl₃ is 133.34 g/mol.
150. g × 1 mol/133.34 g = 1.12 mol
Step 3: Calculate the molar concentration of AlCl₃
Molarity is equal to the moles of solute divided by the liters of solution.
M = 1.12 mol/0.450 L = 2.49 M
help Tell me the answer.
Answer:
it's easy u just have to put them in a calculator the way they are it will give you your answer atleast I think so hope this helps
How many moles are present when there are 1.00.1026 molecules of water?
Answer: 1.00×10^26=1000×10^23
1000×10^23/6.022×10^23=166.05×10^23 moles of water.
HOPE IT HELPS ☺️
PLEASE MARK AS BRAINLIEST
Explanation:
Identify the labeled structures.
Which of the following is an example of a situation where work occurs?
A
a glass of water sitting on the counter
B
a leaf resting on a rock
с
a student sitting at a desk
D
a baseball soaring through the air
Answer:
a baseball soaring through the air
Explanation:
According to the passage, “Work occurs whenever something is moved and an object is put into motion.” A baseball soaring through the air is an object in motion.
An example of a situation where work occurs is a baseball soaring through the air. Therefore, option D is correct.
What is work ?Work is defined as the energy that is applied to or removed from an object by applying force along a displacement. In its simplest form, it equals the product of the force's magnitude and the distance traveled for a constant force directed in the same direction as the motion.
Inertia law. Its name derives from an object's propensity to resist any change in motion up until an out-of-balance force acts on it.
A force that opposes motion is friction. Friction occurs when two moving objects come into touch and operates in the opposite direction.
The angle between force and displacement determines the kind of work that is done. Positive work occurs when a force is applied and an object is moved in that direction.
Thus, option D is correct.
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name any
three kinds of mixtures with example
Answer:
Here are a few more examples:
Smoke and fog (Smog)
Dirt and water (Mud)
Sand, water and gravel (Cement)
Water and salt (Sea water)
Potassium nitrate, sulfur, and carbon (Gunpowder)
Oxygen and water (Sea foam)
Petroleum, hydrocarbons, and fuel additives (Gasoline)
Heterogeneous mixtures possess different properties and compositions in various parts i.e. the properties are not uniform throughout the mixture.
Examples of Heterogeneous mixtures – air, oil, and water, etc.
Examples of Homogeneous mixtures – alloys, salt, and water, alcohol in water, etc.
Explanation:
Answer:
smog,mud, cement?
Explanation:
Smoke and fog (Smog)
Dirt and water (Mud)
Sand, water and gravel (Cement)
Which answer best defines solute ?
Answer:
a substance that dissolves in another substance
Explanation:
a substance into which another substance dissolves
Answer:
sol·ute
noun
1.
the minor component in a solution, dissolved in the solvent.
Choose ALL that apply for spring tides Occur twice a month Moon, Sun, and Earth are perpendicular Highest of the high tides and lowest of the low tides. Moon, Sun, and Earth are aligned
Answer:
Twice a month, sun and earth are perpendicular
Explanation:
Answer:
2 times in a month it happens
Explanation:
hope this helps (:
Help me please I’m struggling very bad
Answer:
Answer in explanation below!
Explanation:
Box 1 : Eukarya - this is the domain of organisms that have cells enclosed within a nuclear envelope
Box 2: Protista - any eukaryotic organism that is not an animal, plant or fungus
Box 3: Fungi - they can be single celled ( unicellular ) or multicellular
Box 4: Eubacteria - they are prokaryotic microorganisms
I hope this helps, good luck!
Answer:
I answered on the other thread! <3
Explanation: