It makes the number simpler by putting it up to the next ten ex. 37 will be rounded up to 40
Which material has been recycled for over 3,000 years?
Answer:
plastic
Explanation:
my cat just said HELL should i be concerned.
( i am dead serious not hello just HELL)
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!!?!?!?
What is chemical potential energy?
A. Energy stored by atoms
B. Energy of motion
C. Energy stored in height differences
D. Energy from gravity
Answer:
the answer is A.
i think:/
Explanation:
what does our life have in common with the periodic table, What is the relationship between the world around us and the periodic table?
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:
Write the ionic equation, including state symbols, for the reaction between zinc and iron(II) sulfate
Answer:
Fe (s) + Cu^2+ (aq) + SO4^2- (aq) --> Cu (s) + Fe^2+ (aq) + SO4^2- (aq)
Explanation:
What are the coefficients when the following equation is correctly balanced? __NaClO3 ----> __NaCl + __O2
how many total elements are in marble?
Answer:There are total 118 elements in world as about marbale
Explanation:
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
How did Wegener use fossils as evidence that continents had moved?
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
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
Which of the following compounds is least soluble in water?
1) Copper (II) Chloride
2) Aluminum Acetate
3) Iron (III) hydroxide
4) Potassium Sulfate
Answer:
3) iron (iii) hydroxide
Explanation:
Which of the following is a layer of the solid Earth?
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:
Earth’s magnetic field is generated by a conducting fluid in its core. Explain why this is a theory.
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.
mg(oh)2
How many H atoms are there?
How many Mg?
What is the total number of atoms?
Any two difference between short sightedness and long sightednes
Explanation:
tala it is also called myopia lekhnu hai
Äni Arko MA it is also called hypermetropia .
What is the empirical formula of C 6 H 18 O 3 ?
What kind of mixture is a solution? Name the different constituents of a solution
Answer:
homogeneous mixture
Explanation:
two or more substances
a component that dissolves and a solvent
Order the following atoms from smallest to largest atomic radius: C, N, P
Answer:
N, C, P
Explanation:
A word equation is commonly used for describing a:
a. Property of a compound
b. Property of an element
c. Chemical reaction
the answer is B because I jus did that
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
Answer:
A
Explanation:
Photosynthesis is reverse combustion, thus, water and carbon dioxide should be reactants. Photosynthesis also needs sunlight, so A it is.
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?
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]
Sapphires and Rubies are composed of ?
A. olive
B. turquoise
C. corundum
D. quartz
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.
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
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
WHICH COMPOUND HAS BONDS WITH THE LEAST DEGREE OF POLARITY (LEAST POLAR)?
Explanation:
H−S has least polarity in the bond because the electronegativity difference between H and S is the least.
What factors determine the amount of chemical energy an object has?
Answer:
The chemical energy in a substance is determined by the potential energy of the bonds of the products formed when it reacts
Explanation:
Write one paragraph to summarize Strengths and Weaknesses of Acids and Bases.
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.
List the 3 particles of an atom (w/their symbol & charge)
Proton p +1
Neutron n 0
Electron e- -1
What is the chemical formula of water?
O N20
O H20
O NH3
O HO3
Answer:
H20
Explanation:
Answer: O H20
Explanation:
8. __H2 + __O2-> __H2O
9. __K2SO4 + __H2-> __H2SO4 + __K
10. __NO2 + __H2O-> __HNO3 + __NO