Answer:
A
Explanation:
Two specialized cells called 'guard cells' make up each stoma (stoma is singular for stomata). Plants have many stomata up to 400 per mm2 on their leaf surfaces and they are usually on the lower surface to minimize water loss.
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.
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:
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).
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
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.
To know more about enthalpy, here:
brainly.com/question/24170335
#SPJ1
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.
To know more about discovery, visit;
https://brainly.com/question/28338261
#SPJ6
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.
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.
One solution contains 14.9 g KCl in exactly 10 mL of solution. What is the molarity of the solution? molar mass KCI = 74.5 g/mol
Answer:
20
Explanation:
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.
Learn more about ,empirical and molecular formulas ,here:
https://brainly.com/question/13058832
#SPJ6
13 POINTS AND BRAINIEST!!!!
How many moles of ethanol, C2H5OH are need to prepare a 25 m solution using 1200 g water?
Answer:
30 moles of ethanol are needed to prepare a 25 m solution, using 1200 g of water
Explanation:
This a short problem of solutions:
Our solute is ethanol: C₂H₅OH
Our solvent is water-
25 m, is our solution's concentration. m means molality (moles of solute contained in 1kg of solvent).
Our solvent mass is 1200g. We convert them to kg
1200 g . 1kg / 1000g = 1.2 kg
m = mol/kg → mol = m . kg
mol = 25 mol/kg . 1.2kg →30 moles
When all colors are absorbed, you see:
black
white
green
yellow
uhmm, white.
Explanation:
you'll basically look like blind ig
__H2 + __O2 --> __H2O
If 42.3 moles of water are produced, how many moles of hydrogen gas was reacted?
Answer:
42.3moles
Explanation:
The chemical equation given in this question is as follows:
H2 + O2 → H2O
However, this equation is unbalanced, the balanced chemical equation is as follows:
2H2 + O2 → 2H2O
This equation shows that;
2 moles of hydrogen gas (H2) will produce 2 moles of water (H2O)
Hence, If 42.3 moles of water (H2O) are produced, 42.3 × 2/2
= 42.3moles of hydrogen was reacted.
where do these all go?
Answer:
The one inside with "+"--- Protons
The grey ones inside--neutrons
The ones on the electron orbits---electron
Everything is called an atom
Explanation:
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.
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!
Where do plants get their energy?
Answer: they get their energy from the sun.
Explanation:
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
QUESTION 2:
The molar mass for this compound is 60.11 g/mol.
The molecular formula for this compound is
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
A chemist requires 0.358 mol Na2CO3 for a reaction. How many grams does this correspond to?
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:
.
Describe what each component of the Currents Tank Investigation represents.
In the Currents Tank Investigation,
a. the water represents
b. the sides of the tank represent
c. blowing through the straw represents
d. the moving pepper helps illustrate the movement of
1. currents
2.prevailing winds
3.the ocean
4.continents
Answer:
a. the water represents -- 3.the ocean
b. the sides of the tank represent -- 4.continents
c. blowing through the straw represents --- 2.prevailing winds
d. the moving pepper helps illustrate the movement of -- 1. currents
Explanation:
According to the amounts mentioned in the current talks investigation the ocean is represented by the water, the sides of the tanks are represented by the continents. The blowin of the straw illustrates the prevailing winds in the eastern ad western direction and the moving pepper shows the movment of ocean currents.At which point is the compound a solid?
1- F
2- G
3- H
4- I
Answer:f
Explanation:
Plz give brainlest
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:
Magnesium and bromine react to produce magnesium bromide. What is the balanced chemical equation for this reaction?
Answer:
MgBr2
Explanation:
On the periodic table, Magnesium has 2+ charge and Bromine has -1 charge.
You cross charges and get MgBr2
Magnesium and bromine react to produce magnesium bromide. The balanced chemical equation for this reaction is Mg + Br[tex]_2[/tex] [tex]\rightarrow[/tex] MgBr[tex]_2[/tex].
What is balanced equation?An equation for just a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In other words, both side of the reaction have an equal balance of mass and charge.
This is accomplished by altering the compounds' coefficients. In this example, the subscripts (tiny numbers towards the outside of some elements, including iron and oxygen) are never altered. Magnesium and bromine react to produce magnesium bromide. The balanced chemical equation for this reaction is Mg + Br[tex]_2[/tex] [tex]\rightarrow[/tex] MgBr[tex]_2[/tex].
Therefore, the balanced chemical equation for this reaction is Mg + Br[tex]_2[/tex] [tex]\rightarrow[/tex] MgBr[tex]_2[/tex].
To learn more about balanced equation, here:
https://brainly.com/question/29769009
#SPJ6
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?
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
How many atoms are in 5.40 moles of Copper, Cu?
a. 63.55
b. 8.97x10^-24
c. 5.12x10^22
d. 3.25x10^24
3.25 × 10²⁴ atoms are present in 5.40 moles of Copper, Cu.
Thus, option D is accurate.
What is mole?A mole is a measurement of quantity. A fixed amount of something is represented by 1 mole.
Objects with dimensions on the atomic scale are counted using this unit.
According to formal definition, one mole of a substance has the same number of particles as atoms in a 12-gram sample of carbon-12.
Mole of Copper (n) = 5.40 mol (Given)
We know that, one mole of particle contains Nₐ= 6.022 × 10²³ mol⁻¹ number of particles. (Nₐ stands for Avogadro's Number)
Thus, the number of atoms in n = 5.40 mol of copper is:
N = Number of Moles × Number of molecules per mole
N = 5.40 mol × 6.022 × 10²³
N = 3.25 × 10²⁴
Thus, 5.40 moles of Copper, Cu contains 3.25 × 10²⁴ atoms.
To know more about mole, refer to the below link :
https://brainly.com/question/22540912
#SPJ2
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