Answer:
1730 cm
0.00256 km
5130 mm
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 sampletissues 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
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(n) ______________ is an organism that lives on another organism and causes harm to that organism
Answer: The answer is Parasite ma dude
Explanation:
In evolutionary ecology, parasitism is a symbiotic relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm, and is adapted structurally to this way of life.
Hopes this helps
Answer:
The answer of tis fill inthe blanks is tape worm because they suck the blood of their host its other example are liver fluje
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.
Define physical change
Answer to Question.
A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.
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.
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
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:
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:
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:
largest atomic radius in period 4 row
Answer:
hi
Explanation:
Thus, helium is the smallest element, and francium is the largest.
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
How many atoms are in 0.250 moles of Rb?
Answer:
1.51*10^23 atoms Rb
Explanation:
Use dimensional analysis
The compound acetaldehyde most likely contains the functional group shown below:
-C-
downwards equal sign
O
true or false.
True
Further explanationAldehydes are alkane-derived compounds containing the functional group (-CO-) located at the end of the parent carbon chain
The general structure is R-CHO with the molecular formula CnH2nO
Naming is generally the same as the alkane by replacing the suffix with -al
Acetaldehyde(ethanal) is an aldehyde which has 2 C atoms with formula
[tex]\boxed{\bold{C_2H_4O}}[/tex]
The bond between the C atom and the O atom is a double bond
So the C atom has a single bond with H and alkyl and double bonds with O
R - C - H
||
O
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:
Make a prediction about the relationship between electrons and molecular shapes
P.S WILL GIVE BRAINLIEST!
A student has a rectangular block. It is 2 cm wide. 3 cm tall and 25cm long. It has a mass of 600 g. First, calculate the volume of the block:
Answer:
The area of the block is 150 cm
Explanation:
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:
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
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)
What 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.
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:
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.
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
Explain in steps how to find volume of a rock that is not rectangular water displacement
How many kg is 59.0 mg?
Answer:
5.9e-5
Explanation:
I have learned that the law of acceleration can be applied in the
following situations
1.
2.
3.
helpppp poooooo
Answer:
See explanation below
Explanation:
Let's recall what's the law of acceleration.
First of all, the acceleration is a vector that has the change of velocity in function of the time.
Now, the law of acceleration is related to Newton's Second law which states that an object will move only if there are forces around it. In other words, the following expression:
F = m . a
Now, in this case, we know that the acceleration of an object is affected by a force always. So, if an object stand still, it will not move unless you push it or pull it to move, and the acceleration will speed up or down depending of the force it was exerted.
According to this, the law of acceleration can be applied here:
1. A bike going down a hill. Of course, because, let's suppose you let a bike alone go down on a hill, you will see that the speed of the bike will be faster as time goes by. This is because the force acting here is the weight of the bike and gravity.
2. Dropping a ball from a building. In this case, you drop a ball from a high floor on a building, it will happen the same thing as the bike. It will go faster because of gravity.
3. Putting the break on a car. Now in this case it's easy because you only need to know that when you put the brakes, the speed of the car will go down, but also the acceleration. So there's no need of a further explanation of this.
Hope this helps
Which of these is a chemical property of aluminium
Answer:
Option 1
Explanation:
Density of 2.70 g/cm^-3
Answer:
Explanation:
For it’s actually ( Aluminium is highly reactive )