Can someone explain cellular respiration?
Answer:
Explanation:
set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy from oxygen molecules[1
How do we exist? What does scientific evidence suggest about the start of the universe?
Answer:
It all started with the big bang.
The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now (and it could still be stretching).
A 2.400-g sample of meat is subjected to Kjeldahl analysis. The liberated NH3(g) is absorbed by adding 50.00 mL of H2SO4(aq), which is more than enough. This occurs through the reaction 2NH3(g)+H2SO4(aq)→(NH4)2SO4(aq) The excess acid requires 19.90 mL of 0.5510 M NaOH for its complete neutralization.
Answer:
51.04% of protein in the sample
Explanation:
The question is the percentage of protein in the sample and the acid is 0.2496 M H2SO4.
First we need to calculate the moles of sulfuric acid that react:
Moles of sulfuric acid added:
0.0500L * 0.2496mol/L = 0.01248 moles of sulfuric acid.
Moles in excess:
0.01990L * 0.5510mol/L = 0.01096 moles NaOH * (1 mol H2SO4 / 2 moles NaOH) = 0.00548 moles of sulfuric acid.
Moles that react:
0.01248 moles - 0.00548 moles = 7.0x10⁻³ moles of H2SO4 react.
Based on the reaction, the moles of NH3 = Moles of N are:
7.0x10⁻³ moles of H2SO4 * (2moles NH3 / 1 mole H2SO4) = 0.014 moles NH3 = Moles N
The mass of nitrogen (Molar mass: 14g/mol):
0.014 moles N * 14g/mol = 0.196g of N.
The percentage of N is:
0.196g N / 2.400g = 8.17% of N
6.25 times the percentage of nitrogen is the percentage of protein:
8.17%*6.25 =
51.04% of protein in the sampleWhat is the Scientific
Method?
Answer:
I just finished a unit on Scientific Method in my science class! Anyway, it's defined in the screenshots below. Hope this helps!
kinetic energy is energy that an object possesses because of its
Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. If an object has kinetic energy, then it is moving. Many students confuse kinetic energy with potential energy.
How many atoms are in 0.250 moles of Rb?
Answer:
1.51*10^23 atoms Rb
Explanation:
Use dimensional analysis
Will give.brainliest.
the pH scale describes the negative log of the percent _____
ion in a solution
Answer:
The pH of a solution is the negative logarithm of the hydrogen-ion concentration. The pH of pure water or any neutral solution is thus 7.00.
Explanation:
Answer:
hydrogen concentration
Explanation:
15 Each Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!
Answer:
Questions 1 is Letters
Questions 2 is H I believe
Questions 3 is hardness
Explanation:
hope I helped
Answer:
1. c
2. a
3. b
you're welcome
tissues are made up of two or more different types of organs
Answer:
false
Explanation: An organ is a structure that is composed of at least two or more tissue types and performs a specific set of functions for the body.
plz mark brainliest
The Moon’s appearance changes during its ________ around Earth. These changes are called ____________________.
Fill in the blank
Get brainiest for correct
Answer:
The Moon’s appearance changes during its orbit around Earth. These changes are called phases.
Explanation:
what is the heat of reaction H2 + 1/3N2 2/3NH3
Is the discharging of a battery producing electricity an Intramolecular force or Intermolecular force?
Answer:
I think its intermolecular
Explanation:
I'm sorry if it is wrong
Answer:
intermolecular forces
Explanation:
Based on the oxidation states of the atoms in this reaction, answer the questions. 4Fe(0) + 3O2(0) → 2Fe2(3+)O3(2-) How many electrons does the iron half-reaction lose? How many electrons does the oxygen half-reaction gain? What is the total number of electrons that are moved in this oxidation-reduction reaction?
Answer:
Twelve electrons
Explanation:
If we look at the product side, we will notice that iron lost twelve electrons and oxygen gained twelve electrons.
Hence, we have 4Fe^3+ and 2O3^2- showing twelve electrons lost/gained.
Answer:
How many electrons does the iron half-reaction lose?
12
How many electrons does the oxygen half-reaction gain?
12
What is the total number of electrons that are moved in this oxidation-reduction reaction? 12
Explanation:
How many kg is 59.0 mg?
Answer:
5.9e-5
Explanation:
The atomic radius of magnesium is 150 pm. The atomic radius of strontium is 200 pm. What is the atomic radius of calcium
Answer:
The atomic radius of calcium is approximately 175
Explanation:
Given that the atomic radius of magnesium = 150 pm
The atomic radius of strontium = 200 pm
Therefore, given that calcium comes in between magnesium and strontium in group 2 of the periodic table, the atomic radius should be half way between the length of the atomic radius of magnesium and strontium, given that the atomic radius is not a fixed quantity
Therefore;
The atomic radius of calcium is approximately given as follows;
The approximate atomic radius (200 + 150)/2 = 175 pm.
What is aluminum found in or used for? plz dont look it up
Answer:
Aluminum isn't found pure naturally, but its found mixed with other minerals in the earth. It's used to make cans, foil, kitchen utensils, window frames and even deodorant
Explanation:
Make a prediction about the relationship between electrons and molecular shapes
P.S WILL GIVE BRAINLIEST!
If measurements are made, then they are more precise on a larger scale.?
Answer:
No.
Explanation:
According to the formula б/X=б/√n, as more measurements are made, the uncertainty gets smaller.
How do I write the following :
One atom of Nitrogen
Five atoms of Nitrogen
One molecule of Nitrogen
Five molecules of Nitrogen
One molecule of Sulfur
One atom of Sulfur
Eight molecules of Sulfur
Answer:
Five molecules of nitrogen and eight molecules of sulfur
Explanation:
The east-west Schism resulted from a power struggle between the emperor and whom?
PLEASE HELP IM BEING TIMED
A:the pope
B:priests
C:bishops
D:The patriarch
Answer:
I'm pretty sure it is the patriarch
Explanation
Patriarch means the head of a family or tribe.
Answer:
D
Explanation:
This occurs when energy is added or removed
Answer:
melting
Explanation:
Answer:
physical change
Explanation:
i googled it and that's what came up sry if it's wrong (change of state came up too if that doesn't work)
Increasing the temperature of gas in a container that cannot expand is a way to _______. decrease the volume of the gas decrease the volume of the gas increase the pressure of the gas increase the pressure of the gas decrease the pressure of the gas decrease the pressure of the gas increase the volume of the gas
Answer:
Increase the pressure of the gas
Explanation:
According to the Pressure law, for a fixed mass of gas, at a constant volume (V), the pressure (P) is directly proportional to the absolute temperature (T).
From the kinetic molecular theory, gases are composed of particles which are in constant motion, colliding with themselves as well as with the walls of their container.
When the temperature of these gas molecules is increased, the molecules acquire more kinetic energy and the rate of collisions increases. Since the container cannot expand, the increase in pressure is due to the increase in collisions between the molecules of the gas as well as with the walls of their container.
Answer:
False
Explanation:
Its F
Express the following as a whole number or as decimals: 3.5 x 10-3 m
HURRY!! Solve. C3H8(g) + 5O2(g) --> 3CO2(g) + 4H2O(g)
What is the Enthalpy of reaction?
What is the total Enthalpy of Reactants and Products? (Kj/Mol)
Is this a endothermic or exothermic reaction?
Answer: hope this helps!
Explanation:
What are two substances that are useful because of their viscosity? (Please describe why they are useful)
Answer:
The two substances are Grease and Oil.
Explanation:
- Grease is used for other lubrication outside of the engine when it is really cold.
- Oil is used for lubricating when your engine is really hot.
Explain in steps how to find volume of a rock that is not rectangular water displacement
A proton is a subatomic particle carrying a charge equal to but opposite that of an electron
true
false
Answer:
True
Explanation:
A proton has a charge of +1, while an electron has a charge of -1. This is why a neutral atom has the same number of protons as electrons.
Neutrons have no charge, hence their name neutron which is similar to neutral.
need help ASAP I will mark you brainiest if you answer!
If an egg is placed in a container of salt water, the mass of the egg will decrease because water will move out of the egg. What process does this represent?
Osmosis
Mitosis
Respiration
Fermentation
Answer:
osmosis. I
Explanation:
If an object/ cell is placed in a solution where the concentration is more or stronger than itself(hypertonic solution), it shrinks because water moves out of it, but if it is placed where the concentration of the surrounding solution is lesser than its concentration(hypotonic solution), it swells and can burst because water moves into it. So the mass of the egg will decrease because it is placed in an hypertonic solution (salt water) and the concentration of the salt water is stronger than its concentration
An agronomist hypothesized that add ran intots
the growth of Bermuda grass seedlings. He
planted three samples of grass and watered each
with a different pH solution.
How did plant growth in the pH 3.1 group compare
to plant growth in the other groups?
Answer:
D
Explanation:
Answer:
1. D
2. A
Explanation:
Find the force of the mass is 6kg and the acceleration is 12 m/s/s
Answer:
72N
12m/s
Explanation:
f=ma
=6×12
=72N
a=f÷m
=72÷6
=12m/s