Answers
Answer:
Explanation:
21:B 22:B
Related Questions
How many moles of butane (C4H10(g)) were combusted in the presence of excess
oxygen gas if 55.8 L of water vapour at STP is collected?
Answers
Moles of Butane combusted : 0.4982
Further explanationGiven
55.8 water vapour at STP
Required
moles of Butane
Solution
Reaction(Combustion of Butane) :
2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O
1 mol at STP = 22.4 L, so mol of H₂O for 55.8 L :
=55.8 : 22.4
=2.491 moles
mol H₂O based on Butane as a limiting reactant(excess Oxygen)
From the equation, mol ratio Butane-C₄H₁₀ : H₂O = 2 : 10, so mol Butane :
[tex]\tt =\dfrac{2}{10}\times 2.491\\\\=0.4982[/tex]
Write the ionic equation, including state symbols, for the reaction between zinc and iron(II) sulfate
Answers
Answer:
Fe (s) + Cu^2+ (aq) + SO4^2- (aq) --> Cu (s) + Fe^2+ (aq) + SO4^2- (aq)
Explanation:
mg(oh)2
How many H atoms are there?
How many Mg?
What is the total number of atoms?
Answers
There is 1 Mg atom
There are a total of 5 atoms
Which statement accurately compares the properties of 1.00 mole of oxygen (O2) and 1.00 mole of
sodium (Na)? The oxygen -
O Contains more particles than sodium
O Contains less particles than sodium
O has a smaller mass than sodium.
O has a larger mass than sodium
Answers
Write one paragraph to summarize Strengths and Weaknesses of Acids and Bases.
Answers
Answer:
Explanation: I can't give you the answer you with the sentence but i will help you the best i can
One qualitative measure of the strength of an acid or a base solution is the pH scale A logarithmic scale that relates the concentration of the hydrogen ion in solution.
2. The atomic number of an atom comes from *
The number of electrons.
The number of neutrons.
The number of protons.
Its atomic mass.
Answers
how many total elements are in marble?
Answers
Answer:There are total 118 elements in world as about marbale
Explanation:
What is chemical potential energy?
A. Energy stored by atoms
B. Energy of motion
C. Energy stored in height differences
D. Energy from gravity
Answers
Answer:
the answer is A.
i think:/
Explanation:
my cat just said HELL should i be concerned.
( i am dead serious not hello just HELL)
Answers
Answer:
Oh my. Just make sure that your cat isn't possessed by a demon or something. You never know if it's satan watching your back
Answer:
Explanation:
^^Shoyo hinata here!!!!!
welll that’s scary…!!! ♡(.◜ω◝.)♡
Awwwwwe I love cats when they talk! have u wached anime near your cat????? Maybe it’s possessed!!?!?!?
WHICH COMPOUND HAS BONDS WITH THE LEAST DEGREE OF POLARITY (LEAST POLAR)?
Answers
Explanation:
H−S has least polarity in the bond because the electronegativity difference between H and S is the least.
Sapphires and Rubies are composed of ?
A. olive
B. turquoise
C. corundum
D. quartz
Answers
Answer:
c
Explanation:
it is corundum now please follow me
Answer: corundum
Explanation: Both are made of alumina and oxygen, but they just differ in color. When a corundum is red, it is classified as a ruby, and when it’s blue, it is called a sapphire.
A word equation is commonly used for describing a:
a. Property of a compound
b. Property of an element
c. Chemical reaction
Answers
the answer is B because I jus did that
Which of the following is a layer of the solid Earth?
Answers
Answer:
The inner core is solid. But the mantle is solid/plastic
Explanation:
I completed the class Earth science
Answer:
The answer on study island in the LITHOSPHERE.
Explanation:
Order the following atoms from smallest to largest atomic radius: C, N, P
Answers
Answer:
N, C, P
Explanation:
What factors determine the amount of chemical energy an object has?
Answers
Answer:
The chemical energy in a substance is determined by the potential energy of the bonds of the products formed when it reacts
Explanation:
Which of the following is not true about one mole?
the mass of 1 mole of carbon atoms = the mass of
1 mole of boron atoms
one mole contains 6.02 x 1023 particles
the number of atoms in 1 mole of carbon = the number of atoms in 1 mole of boron
12 g of carbon equals one mole of carbon atoms
Answers
Answer:
A
Explanation:
Bc ik
The number of atoms in 1 mole of carbon = the number of atoms in 1 mole of boron is not true about one mole.
What element of one mole is false?It is untrue to say that one mole of fluorine gas weighs more than one mole of oxygen gas. Fluorine gas has a molar mass of 38 grams per mole, whereas oxygen gas has a molar mass of 32 grams per mole, based on their relative molar masses.
A mole of a substance is equal to 6.022 × 10²³ of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is referred to as "Avogadro's number" or "Avogadro's constant."
Since boron has a different molar mass than carbon, the statement that there are the same number of atoms in each mole is untrue.
The ratio of the substance's mass to its molar mass is used to express the number of moles of an element.
Moles = Mass/Molar mass
Given that the molar masses of carbon and boron differ, the statement that the number of atoms in a mole of carbon is equal to the number of atoms in a mole of boron is false.
Therefore, the correct answer is option c) the number of atoms in 1 mole of carbon = the number of atoms in 1 mole of boron.
The complete question is:
Which of the following is not true about one mole?
a) the mass of 1 mole of carbon atoms = the mass of
b) 1 mole of boron atoms
one mole contains 6.02 x 1023 particles
c) the number of atoms in 1 mole of carbon = the number of atoms in 1 mole of boron
d) 12 g of carbon equals one mole of carbon atoms
To learn more about one mole refer to:
https://brainly.com/question/28037816
#SPJ2
Any two difference between short sightedness and long sightednes
Answers
Explanation:
tala it is also called myopia lekhnu hai
Äni Arko MA it is also called hypermetropia .
Which material has been recycled for over 3,000 years?
Answers
Answer:
plastic
Explanation:
What is the chemical formula of water?
O N20
O H20
O NH3
O HO3
Answers
Answer:
H20
Explanation:
Answer: O H20
Explanation:
What are the coefficients when the following equation is correctly balanced? __NaClO3 ----> __NaCl + __O2
Answers
Which of the following compounds is least soluble in water?
1) Copper (II) Chloride
2) Aluminum Acetate
3) Iron (III) hydroxide
4) Potassium Sulfate
Answers
Answer:
3) iron (iii) hydroxide
Explanation:
What kind of mixture is a solution? Name the different constituents of a solution
Answers
Answer:
homogeneous mixture
Explanation:
two or more substances
a component that dissolves and a solvent
How did Wegener use fossils as evidence that continents had moved?
Answers
Answer: Because the same Fossils were found on other continents.
Explanation:
The world used to be connected but then what I call the Continental Drift started and the world broke apart, along with the dinosaurs splitting in two or more packs.
1. Which term best describes ultraviolet radiation?
a. Harmless
b. Invisible
c. Undetectable d. Beneficial
Answers
8. __H2 + __O2-> __H2O
9. __K2SO4 + __H2-> __H2SO4 + __K
10. __NO2 + __H2O-> __HNO3 + __NO
Answers
What is the empirical formula of C 6 H 18 O 3 ?
Answers
what does our life have in common with the periodic table, What is the relationship between the world around us and the periodic table?
Answers
Answer:
Summary. To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.
Explanation:
Earth’s magnetic field is generated by a conducting fluid in its core. Explain why this is a theory.
Answers
Answer:
It's not a theory, The magnetic pull is from the core of the earth and pulls you down. example: I can jump and fall, Why? because of the core of the earth of me going p and then down. Why do you think that space doesn't have gravity? It's because it doesn't have a core, There are no planets that pull you down enough like earth.
Which chemical reaction shows photosynthesis?
A. water + carbon dioxide + sunlight → oxygen + glucose
B. carbon + oxygen-carbon dioxide
C. hydrogen + oxygen → water
D. nitrogen + hydrogen → ammonia
Answers
Answer:
A
Explanation:
Photosynthesis is reverse combustion, thus, water and carbon dioxide should be reactants. Photosynthesis also needs sunlight, so A it is.
Dipole-Dipole forces are attractive forces
between the dipole of one molecule and
the dipole of another.
a.
Positive, positive
b. Negative, neutral
c. Neutral, neutral
d. Positive, negative