How many moles of aluminum oxide are produced by reacting 54 g of aluminum with oxygen gas?
4Al(s) + 30 2(g) → 24/203(s)
A) 1.0 mol
B) 3.0 mol
C) 4.0 mol
D) 2.0 mol
A hydrochloric acid solution contains 36 percent HCl by mass. Calculate its
molality
what's a vacuum exactly
Answer:
Vacuum: space in which there is no matter or in which the pressure is so low that any particles in the space do not affect any processes being carried on there It is a condition well below normal atmospheric pressure and is measured in units of pressure (the pascal).-the internet gave me this answer so..
Explanation:
hope this helps :)
In which ways are evaporation and condensation similar?
Both cause decrease in air temperature
Both cause increase in air temperature
Both are caused by the warming of the atmosphere
Both are caused by changes in heat energy
Answer:
Both are caused by changes in heat energy
Explanation:
When air gets hotter water will evaporate, when air gets cooler water will condensate.
Type of introduction
Answer:
Five Types of Introductions.
“Inquisitive” Explain why your subject is important, curious, or interesting.
“Paradoxical” Explain what aspects of your subject seem improbable. ...
“Corrective” Explain how your subject has been misunderstood or misrepresented by others. ...
Between what time interval was the object moving the slowest?
Between what time interval was the object moving the fastest
Answer:
from 1 to 2 hour the object was moving the slowestfrom 4 to 5 hours the object was moving the fastestWhich is a general property of cell membranes? a) Membranes contain more lipid than protein. b) Membrane proteins have a polar head and a non-polar tail. c) Membrane lipids are amphipathic. d) Membranes contain covalent bonds between fatty acids
Answer:
c) Membrane lipids are amphipathic.
Explanation:
A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life.
In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles found in all living organisms such as trees, birds, and bacteria include; nucleus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, cytoskeleton, vesicles, golgi apparatus, and cell membrane.
Cell membrane is the wall of a cell and typically controls what leaves and enters the cell.
A general property of cell membranes is that membrane lipids are amphipathic. All the lipid molecules found in the cell membrane are amphipathic or amphiphilic, which means that they are "water loving" (hydrophilic) with a polar end or "water fearing" (hydrophobic) with non-polar end. Thus, membrane lipids have an end that's soluble in water (polar) while the other end is soluble in fat (non-polar).
The membrane lipids are amphipathic.
• In the majority of cell membranes in animals, lipids, that is, fatty molecules forms about 50 percent of the mass of the cell.
• All the molecules of lipid in a cell membrane are amphipathic, that is, they possess a polar end or hydrophilic and non-polar end or hydrophobic end.
• The phospholipids are the most abundant lipids found in the cell membrane.
• They have a polar head group and two hydrophobic hydrocarbon tails.
• It is the amphipathic nature and shape of the molecules of lipids, which makes them to produce bilayers spontaneously.
Thus, correct answer is option c, that is, membrane lipids are amphipathic.
To know more about:
https://brainly.com/question/12372995
3) Which element has the lowest electronegativity value?
A) F
B) Fr
C) Cr
D) Cl
Answer:
ur mom jk i would say fr
Explanation:
How much force is required to accelerate a 22 kg mass at 6 m/s2?s
Answer:
F=132k.gm/s^2Explanation:
F=m×af=22k.g×6m/s^2f=132k.gm/s^2What are some ways that use physics in your everyday life?
Answer:
Roasting s'mores over a fire.
Ironing the wrinkles out of my shirts.
Wet clothes are dried with the hot air of the dryer.
Small speakers in your headphones use electricity and moving magnets to create sound waves.
Explanation:
The reaction between sodium and chlorine that forms table salt is shown
_Na(s) + Cl2 (g) → _NaCl (3)
What coefficient should be added to the blanks to balance the equation?
А.
2
В.
1
2.
2
Answer: 2 Na (s) + Cl(g) -> 2 NaCl (s)
Explanation:
A bee buzzes inside a flower to drink some nectar. While there it touches the stamen. Later the bee goes to another flower and comes into contact with the flower's pistil. Which process of reproduction is this helping with?
QUESTION
A bee buzzes inside a flower to drink some nectar. While there it touches the stamen. Later the bee goes to another flower and comes into contact with the flower's pistil. Which process of reproduction is this helping with?
ANSWER
The bee is helping in pollination which is an important event in case of sexual reproduction in flowering plants.
Pollination is a part of pre-fertilisation ( gamete transfer ).
Pollination by insects ( most commonly bees ) is known as Entamophily
A tank containing 5.00 L of nitrogen at 75.0 atm pressure and 28.0 C is left standing in sunlight. Its temperature rises to 50.0C. What is the pressure at this higher temperature?
Answer:
80.5 atm
Explanation:
First of all, we convert 28.0 °C and 50.0 °C into K:
28.0 + 273.16 = 301.16 K50.0 + 273.16 = 323.16 KTo answer this problem we'll use Gay-Lussac's Law, which states that:
T₁*P₂=T₂*P₁In this case:
T₁ = 301.16 KP₂ = ?T₂ = 323.16 KP₁ = 75.0 atmWe put the data:
301.16 K * P₂ = 323.16 K * 75.0 atmAnd solve for P₂:
P₂ = 80.5 atmThus, the correct answer is 80.5 atm.
PLEASE HELP!
The chemical formula of a compound provides information about the elements present in the compound and their ____
ratios. A) grams B) ratio C) mole D) empirical
Answer:
C. Mole
Explanation:
Chemical formula deals with mole number
This is an example of which type of short-term human-induced environmental change?
Answer:
The short term human induced environmental changes are pollution and deforestation. The term deforestation can be defined as the cutting down of trees in huge amount. The reason can be cutting down of trees for human settlement. Pollution can be defined as the undesirable in the environment.
Convert 9.5 x 10^23
How many grams of potassium chloride are in 4.25 x 1023 molecules?
Do a quick conversion: 1 moles Potassium Chloride = 74.5513 gram using the molecular weight calculator and the molar mass of KCl.
Q1 - How would you balance the following equation: N₂ + O₂ N₂O₅
A: N₂ + 5 O₂ N₂O₅
B: 2 N₂ + 5 O₂ 2 N₂O₅
C: N₂ + 5 O₂ N₂2O₅
D: N₂ + O₂ N₂O₅ (already balanced)
Q2 - In the reaction, HCl + NaOH NaCl + H₂O, what is/are the reactant(s)?
A: HCl only
B: HCl and NaOH
C: NaCl only
D: HCl and NaCl
nswer:
For Q1 its B!
Explanation:
cuz I'm smart dw.
1. Which of the following elements have atoms with a full shell of
valence electrons (1 point)
a. Lithium
b. Oxygen
c. Hydrogen
d. Neon
Answer:
The answer is neon.
Explanation:
Hope this helped Mark BRAINLEST!!!
Which of your recipes was the best?
Trial 1
Trial 2
Trial 3
Why is this your best recipe? What criteria did you meet?
Answer:
trial 1
Explanation:
trust
If you can solve both
Will mark brainly
ASAP
Answer:
The main function sis the 2nd one and the substance provides the first 1.
Explanation:
Hope you finish the rest on your own, have fun!
Consider the equation for the formation of a kidney stone.
2Na3 PO4 (aq) + 3CaCl2 (aq) =
Ca3(PO4)2 (s) + 6NaCl (aq)
Is each reactant bonded ionically or covalently?
How do you know?
Answer:
Ionically, because they are ionic compounds
Each time a person walks into a room and tums on a light, a change in energy occurs. What is this change in energy?
electrical energy is converted into light energy
kinetic energy is converted and the potential energy
light energy is converted in mechanical energy
Chemical energy is converted into potential energy
PLEASE HELP ME, EMERGENCY SITUATION (50 points)
207.86 grams of uranium (V) hydroxide reacts with 155.78 grams of thorium disulfate, which is the limiting reactant? You must prove your answer by showing the necessary work and explaining your answer choice.
Answer:
Thorium disulfate
Explanation:
Thorium also forms insoluble compounds with fluoride, sulfate, ... hydroxide from solutions of pH 3.6 or above. ... rate should be about 2.5 g/min, and the reaction tube temperature ... thenoyl group decreases the solubility of the reagent in the aqueous
what are particles that differ in number between isotopes
Answer:
Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.
How many valence electrons are there in Se atom?
Answer:
4 valence electrons
Despite the fact that the word silicon has a ubiquitous affiliation with all things electronic, Si itself is not a good electrical conductor. It has 4 valence electrons, meaning that filling its outer shell it can form a very strong lattice with 4 neighboring Si atoms-with no un-bonded electrons remaining
Answer:
The numer of valence electrons is defined as the number of electrons present in the outer most shell of the atom.So, in the case if selenium, there are 6.
question above in picture
PLEASE I WILL BRAINLIST YOU
1. A student predicted the reaction between hydrogen and oxygen gas would yield 125 mL of water. However, after measuring the water formed in the reaction, the student determined that only 110 mL of water was actually formed. Determine the percent yield for this reaction.
A. 75%
B. 88%
C. 100%
D. 113%
HINT: 96 yield= (actual yield/ expected yield ) X 100%
Answer:
B. 88%
Explanation:
percent yield is the actual yield divided by the theoretical (predicted) yield, then multiplied by 100 to get a percentage.
110/125 = 0.88
0.88 x 100 = 88%
In chemistry, the term yield also known as the reaction yield represents the measure of the quantity of the moles of a product formed in the reaction to the reactant used. The correct option is B.
What is percent yield?The amount of the product actually made compared with the maximum calculated yield is defined as the percent yield. It can also be known as the ratio of the actual yield to the theoretical yield.
The ideal quantity of the product is called the theoretical yield and it is obtained by working a stoichiometry problem. The actual amount of the product formed gives us the actual yield.
The equation of the percent yield is given as:
%yield = Actual yield / Theoretical yield × 100
110 / 125 × 100 = 0.88 × 100 = 88%
Therefore the percent yield of the reaction is 88%.
Thus the correct option is B.
To know more about percent yield, visit;
https://brainly.com/question/29714892
#SPJ2
- What is the percent yield if your actual yield is 39.78g and your theoretical
yield was 47.84 g?
What are some ways the stars in the photo could be grouped or classified