Answer:
The nucleus contains all of the genetic material for a eukaryotic cell, but this genetic material needs to be protected.
Explanation:
Hopes this helps
I need help I'm in a science quiz
All of the following are forms of energy that drive the rock cycle EXCEPT:
Solar Energy
Chemical Energy
Heat Energy
Air temperature
Pressure
Gravity
Which of the following substances is a compound? A. hydrogen gas B. nitrogen gas C. table sugar D. oxygen gas
Answer: Ur answer would be C: Table sugar
At which point is the compound a solid?
1- F
2- G
3- H
4- I
Answer:f
Explanation:
Plz give brainlest
How does the structure of the steroid EXPLAIN the function of the steroid?
Answer:
Explanation:
Steroids have two principal biological functions: as important components of cell membranes which alter membrane fluidity; and as signaling molecules. Hundreds of steroids are found in plants, animals and fungi. All steroids are manufactured in cells from the sterols lanosterol (opisthokonts) or cycloartenol (plants).
I need a tutor!!! I really wanna learn but my professor has a language barrier. How many grams of oxygen are required to react with 2.05 g of dihydrogen sulfide?
How many moles of NH3 will be produced if you completely react 6 moles 2 points
of N2? *
N2 + 3H2 + 2NH3
12 mol NH₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
MolesStoichiometry
Using Dimensional AnalysisAnalyzing Reactions RxNExplanation:Step 1: Define
[RxN - Balanced] N₂ + 3H₂ → 2NH₃
[Given] 6 moles N₂
[Solve] moles NH₃
Step 2: Identify Conversions
[RxN] 1 mol N₂ → 2 mol NH₃
Step 3: Stoich
[DA] Set up conversions: [tex]\displaystyle 6 \ mol \ N_2(\frac{2 \ mol \ NH_3}{1 \ mol \ N_2})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 12 \ mol \ NH_3[/tex]Which of the following represents a molecule?
Answer: Molecules can be represented with a chemical formula which shows the types of atoms in the molecule, and, uses subscripts, ti show how many of each type of atom is present. such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.
H2O (water)
N2 (nitrogen)
O3 (ozone)
CaO (calcium oxide)
C6H12O6 (glucose, a type of sugar)
NaCl (table salt)
Explanation:
QUESTION 2:
The molar mass for this compound is 60.11 g/mol.
The molecular formula for this compound is
can you calculate the number of moles in 170 grams of methane (CH4)
Answer:
1 grams Methane = 0.062334579609362 mole using the molecular weight calculator and the molar mass of CH4. ... errors may occur, so always check the results. Use this page to learn how to convert between grams Methane and mole. Type in your own numbers in the form to convert the units!
Explanation:
1 grams Methane = 0.062334579609362 mole using the molecular weight calculator and the molar mass of CH4. ... errors may occur, so always check the results. Use this page to learn how to convert between grams Methane and mole. Type in your own numbers in the form to convert the units!
Did you ever rediscover something of yours that you
had forgotten? How did you react?
Answer:
Yes It was a 147 yr old knife it had been passed down for a few generations we were glad to find it again i will pas it down one day too
Explanation:
When we rediscover something that we had missed years ago we feel very happy. This happiness will come in everyone's face without any difference in the ages.
What is rediscover?The term rediscover indicates to find something or someone again after losing or forgetting about it, him, or her for a long time. For example in child hood days we all have gone to parks. But now all those parks are a happy rediscovery of childhood.
When i was in the age of 5 my grandfather gifted me a beautiful necklace of gold. I used to wear that in all functions. But one day when i searched it was not at my room. I cried a lot during that time.
But after 5 years, when we are shifting to a new home all the places of our old home is cleaned. During cleaning i got my necklace from an old utensil in the store room. This time i just shocked, i didn't thought that it will again come into my hand.
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Where do plants get their energy?
Answer: they get their energy from the sun.
Explanation:
how many moles are contained 80.3 gram of sm(no3)3
0.239 mol Sm(NO₃)₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 80.3 g Sm(NO₃)₃
[Solve] moles Sm(NO₃)₃
Step 2: Identify Conversions
[PT] Molar Mass of Sm - 150.36 g/mol
[PT] Molar Mass of N - 14.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of Sm(NO₃)₃ - 150.36 + 3[14.01 + 3(16.00)] = 336.39 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 80.3 \ g \ Sm(NO_3)_3(\frac{1 \ mol \ Sm(NO_3)_3}{336.39 \ g \ Sm(NO_3)_3})[/tex][DA] Divide [Cancel out units]: [tex]\displaystyle 0.238711 \ mol \ Sm(NO_3)_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.238711 mol Sm(NO₃)₃ ≈ 0.239 mol Sm(NO₃)₃
A chemist requires 0.358 mol Na2CO3 for a reaction. How many grams does this correspond to?
PLEASE ANSWER THIS FASTE LIKE RIGHT KNOW!!!!!
What must happen to DNA in both replication and transcription?
The two strands of a DNA molecule must ___________________.
PLEASE HELP ME
2. In the cause and effect chart below, decide whether the cause makes a chemical reaction speed up or slow down. Circle the correct answer.
Answer:
speeds up, slows down, slows down, speeds up, slows down
GIVING BRAINLIEST TO CORRECT ANSWER
Friction__
A. happens whenever work is done
B. occurs when objects rub against each other
C. releases energy as heat
D. all of the above
Answer:
B) occurs when objects rub against each other
Explanation:
Answer:
B. occurs when objects rub against each other
Explanation:
Friction is a force between two surfaces that are sliding, or trying to slide, across each other. ... Friction always works in the direction opposite to the direction in which the object is moving or trying to move. Friction always slows a moving object down.
When all colors are absorbed, you see:
black
white
green
yellow
uhmm, white.
Explanation:
you'll basically look like blind ig
what is the difference between the mitochondria and the excretory system?
Answer:
Mitochondria is a membrane-bound organelle stored in cells and their function is to generate chemical energy to power the cell's biochemical reaction.
The excretory system is an organ system that eliminates wastes, prevents harmful accumulation of chemicals in the body, and maintains the body's chemical concentration.
Explanation:
3.
Violent downdrafts that are concentrated in one local area are
a. downdraft cells.
c. downbursts.
b. downstrokes.
d. updrafts.
Answer:
They are called downbursts.
1. How many electrons are in Argons outer shell?
2. How many electrons are in Lithium's outer shell?
3. How many times can Oxygen bond?
4. What is the charge on a phosphorus ion?
5. What is the charge on a calcium ion?
Answer:
jwwnwwjkqnwjwmwnqnqwnmqaj
Answer:
1. 8
2.1
3.4 times
4.3-
5. 2+
Explanation:
1. it qualifies under the octet rule and is completely stable.
2. 1 because it fills every shell and has one left over
3. each time an element like oxygen bonds it can be surrounded by 8 electrons in order to be stable and each line that you may see counts as two electrons so it can have 1 bond line in each direction.
4.&5. It just is that way
You have 45.2 liters of SO2. This would be equal to
grams of S02
• Use ROUNDED masses from the periodic table in your calculations
• Answer can ONLY include numbers, no units
• Answer should be 3 digits (no decimals)
Answer:
you speak spanish
speak spanish
We have observed evidence that when M-NM compounds are dissolved, the metal particles tend to form positively charged ions (cations), while non-metal particles tend to form negatively charged ions (anions).
a. True
b. False
Answer:
a. True
Explanation:
From Thomson's Plum Postulate on Pudding model of an atom, he posits that particle includes electrons that are encircled by a circle of positive charge to adjust the negative charges of electrons, which is fundamentally the same as way like negatively charged "plums" is getting encased by positively charged pudding.
Hence, the above statement is true.
Which of the following has the most number of atoms
Answer:
Explanation:
where is the pic?
Answer:
what are the following? if you can provide them I can try to answer it for you
Explanation:
Similarities between manner of death and cause of death
Answer:
The cause of death is the specific injury or disease that leads to death. The manner of death is the determination of how the injury or disease leads to death.
Explanation:
.
the lungs are covered with a thin layer called ________
interstitium
#keeponlearning
Answer:
pleura
Explanation:
The lungs are covered by a thin tissue layer called the pleura. The same kind of thin tissue lines the inside of the chest cavity -- also called pleura.
A steel calorimeter has a volume of 75.0 mL and is charged with Oxygen gas to a
pressure of 255 kPa at 22.5°C. What is the amount of Oxygen molecules
present
Answer:
7.78×10¯³ mole
Explanation:
From the question given above, the following data were obtained:
Volume (V) = 75 mL
Pressure (P) = 255 kPa
Temperature (T) = 22.5 °C
Number of mole (n) =?
Next, we shall convert 75 mL to L. This can be obtained as follow:
1000 mL = 1 L
Therefore,
75 mL = 75 mL × 1 L / 1000 mL
75 mL = 0.075 L
Next, we shall convert 22.5 °C to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Temperature (T) = 22.5 °C
Temperature (T) = 22.5 °C + 273
Temperature (T) = 295.5 K
Finally, we shall determine the amount of oxygen molecules present in steel calorimeter. This can be obtained as follow:
Volume (V) = 0.075 L
Pressure (P) = 255 kPa
Temperature (T) = 295.5 K
Gas constant (R) = 8.314 KPa.L/Kmol
Number of mole (n) =?
PV = nRT
255 × 0.075 = n × 8.314 × 295.5
19.125 = n × 2456.787
Divide both side by 2456.787
n = 19.125 / 2456.787
n = 7.78×10¯³ mole
Thus, amount of oxygen molecules present in steel calorimeter is 7.78×10¯³ mole
2. What is the percent composition by mass of potassium in KBr?
Determine the molecular and empirical formulas for the substance shown in the ball-and-stick model below.
The molecular and empirical formulas for the following model is C6H6 and CH respectively.
What do you mean by empirical and molecular formulas ?The empirical formula gives the smallest whole number ratio between elements in a compound.
The molecular formula gives the actual whole number ratio between elements in a compound.
Note on C6H6-
Benzene (C6H6), simplest organic, aromatic hydrocarbon and parent compound of numerous important aromatic compounds.
It contains six carbon and hydrogen atoms each.
The molecular and empirical formulas for the following model is C6H6 and CH respectively.
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Based on Reference Table I, the formation of 1 mole of which of the following substances releases the greatest amount of energy?
A) C2H2
B) C2H4
C) CO2
D) H2O
Please help its due in 15 minutes
To solve this we must be knowing each and every concept related to enthalpy and its calculations. Therefore, H[tex]_2[/tex]O is the substances that releases the greatest amount of energy. The correct option is option D.
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.
Mathematically,
q = n ×ΔH
where
q = amount of heat
n = no of moles
ΔH = enthalpy
n = w / M.M
w = given mass
M.M = molar mass
H[tex]_2[/tex]O is the substances that releases the greatest amount of energy.
Therefore, H[tex]_2[/tex]O is the substances that releases the greatest amount of energy. The correct option is option D.
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Structure of an unknown atom 2.5. What is the symbol of this atom and the charge of the nucleus?