Answer:
Answer: Number 1 16.8 L
Answer:
16.78 liters
Explanation:
Volume occupied by oxygen gas at STP is 16.78 liters
Help! “Name 2 elements that can form the same type of ion as calcium. Explain”
Answer:
Beryllium and magnesium will show similar chemical reactions as calcium. Since these elements belong to same group II and also have two electrons in their outermost shell like calcium.
Which of the following is a valid mole ratio from the balanced equation 2C3H6 + 902 - 6CO2 + 6H20? (4 points)
O 1 mol CHE
2 mol CO2
O 6 mol H,
9 mol O2
O 2 mol CHE
6 mol O2
O 3 mol H2O
2 mol CO2
Answer:
6 mol H, 9 mol O2
Explanation:
We can see that in water, there are 6 moles of hydrogen, and for oxygen, there is 9 moles
what form of matter has a definite shape and takes up space?
Answer:
If something is in a solid state of matter, it has a definite shape and volume. The volume of an object is the amount of space it occupies. A block of wood placed on a table retains its shape and volume, therefore, it is an example of a solid. If a liquid is poured on that same table, there are very different results
Explanation:
Hello
Answer:
The reliable and correct answer to this question is Solid
Explanation: If something is in a solid state of matter, it has a definite shape and volume. The volume of an object is the amount of space it occupies. A block of wood placed on a table retains its shape and volume, therefore, it is an example of a solid.
I NEED HELP ASAP PLS
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brainliest;) ^
Explanation:
20g of Na and 10g of Cl2 which is in excess?
The equation of the reaction is given as;
2 Na + Cl2 --> 2 NaCl
From the equation;
2 mol of Na reacts with 1 mol of Cl2
Converting the masses of reactants given to mol
Number of moles = Mass / Molar mass
Na;
Number of moles = 20 / 23 = 0.8696 mol
Cl2;
Number of moles = 10 / 71 = 0.1408 mol
In the chemical equation, the ratio was 2: 1 however with the masses, we can tell that Na is in by far excess.
0.8696 mol of Na would require 0.4348 of Cl2 (Present = 0.1408 mol)
This means;
Na - Excess Reactant
Cl2 - Limiting Reactant
Second part; How much NaCl would be produced?
The limiting reactant determines how much of the product is formed.
From the equation of the reactant;
1 mol of Cl2 produces 2 mol of NaCl
0.1408 mol of Cl2 would require x mol of NaCl
1 = 2
0.1408 = x
x = 0.2816 mol of NaCl
Converting to mass;
Mass = Molar Mass * Number of moles
Mass = 58.44 g/mol * 0.2816 mol
Mass = 16.46 g
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Write the complimentary DNA strand for the given strand of DNA
CGTAAGCGCTAATTA
Answer:
The answer is GCATTCGCGATTAAT
Explanation:
"Chargaff's rule, also known as the complementary base pairing rule, states that DNA base pairs are always adenine with thymine (A-T) and cytosine with guanine (C-G). A purine always pairs with a pyrimidine and vice versa. However, A doesn't pair with C, despite that being a purine and a pyrimidine."
If this is not the answer, try the translation with the 5-3 Strategy and if not still then try using U instead of T.
How many atoms are in 10 moles of chlorine?
O
A. 6.022 x 1023
O
B. 6.022 x 1024
O
C. 1.024 x 1023
D. 1.024 x 1024
Answer:
I Found the answer is A
Explanation:
I use a calculator
NEED HELP PLEASE. NOW
What pressure is exerted by 0.75 moles of a gas at 25°C
in a container with a volume of 1.5 L?
Answer:
1,239,284pa
Explanation:
Assuming it's an ideal gas we use
PV=nRT
P=nRT/V
then we convert our Temperature into Kelvin
T=25+273.15 =298.12K
we convert our volume into M cubed
1.5L =0.0015 cubic meter
P=nRT/V
P= (0.75×298.12×8.314)/0.0015
P = 1,239,284pa
the structure and bonding of gold?
Answer:
metallic bonding
Explanation:
since it is a metal gold forms metalllic bonding.
Answer:
metalic bonding
Explanation:
The empirical formula of a compound is CH. Its molecular mass is 70.14 g.
What is the factor? |
What is its molecular formula? (Write your formula without any space A2B3)
Use the periodic table to determine which of the
following could be an isotope of bromine (Br).
Check all that apply.
Z = 79, A = 196
Z = 35, A = 79
A = 79, N =44
D Z = 44, N = 44
DONE
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Answer: The second one. 26 m/sec
Explanation: i hope this helps! have a great day :)
Which statement best describes the relationship between changes in air pressure and wind speeds?
Answer:
air pressure is the air around you that ahs weight and it presses everytime you touch , wind speeds is the amount of wind formedin weather
Explanation:
Answer: The greater the difference in pressure, the faster the winds. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure
Explanation: Hope this helps :)
1.65g of zinc is used to make 8g of zinc iodide. How much iodine is required for this reaction?
Answer:
6.45 g of iodine, I₂
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
Zn + I₂ —> ZnI₂
Next, we shall determine the mass of Zn and I₂ that reacted from the balanced equation. This can be obtained as follow:
Molar mass of Zn = 65 g/mol
Mass of Zn from the balanced equation = 1 × 65 = 65 g
Molar mass of I₂ = 127 × 2 = 254 g/mol
Mass of I₂ from the balanced equation = 1 × 254 = 254 g
SUMMARY:
From the balanced equation above,
65 g of Zn reacted with 254g of I₂.
Finally, we shall determine the mass of f I₂ needed to react with 1.65 g of Zn. This can be obtained as follow:
From the balanced equation above,
65 g of Zn reacted with 254g of I₂.
Therefore, 1.65 g of Zn will react with = (1.65 × 254)/65 = 6.45 g of I₂.
Thus, 6.45 g of iodine, I₂ is needed for the reaction.
Conduction does not work well in metals.
True or False
Question :
Conduction does not work well in metals. True or FalseAnswer:
False, because:
Thermal conduction is defined as the transport of energy due to random molecular motion across a temperature gradient. It is distinguished from energy transport by convection and molecular work in that it does not involve macroscopic flows or work-performing internal stresses.
Or in other words, Conduction is the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts.
If this helped, you're welcome! If you would, please make me brainliest.
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Which is a mixture
H20
Salad
Table salt
Answer:
salad is a mixture this is the answer of the question
please mark ne has a brainliest
what element is 1s222s222p663s223p664s22
Answer:
Ca
you have too many numbers in there
Explanation:
30 POINTS PLEASE HELP (IF YOU GIVE WRONG ANSWER ILL REPORT U ) What type of galaxy is described as revolving around a single point and has spinning arms of stars which extend from the center? (3 points)
spiral
elliptical
irregular
barred spiral
Answer:
The type of galaxy that is described as revolving around a single point and has spinning arms of stars which extend from the center is;
Spiral
Explanation:
A spiral galaxy which is the most common type of galaxy is a class of Hubble sequence of galaxies which was described in the 1936 work The Realm of the Nebulae by Edwin Hubble
Spiral galaxies are therefore have a flat disk shape such that the stars, the dusts, and the gas that make up the galaxy cluster in several radially spreading spiral arms that come together in the galaxy center
Answer:
Spiral
Explanation:
I NEED HELP HERE PLEASE !!!
A gas has a volume of 4 liters at 3 atm. To expand the volume to 7000 ml, what the new pressure
(in atm) have to be?
Answer:
Gas it too expensive I need to get a job. I have no money to use at the atm
Explanation:
if your car is on 7000 ml it has issues and you need to take it to a mechanic.
what is the atomic number of an atom?
Answer:
The atomic number of an atom is the number of protons in the nucleus or the number of electrons in a neutral atom
Explanation:
Give a situation in life when you've experienced resonance.
How many Noble gases are there?
Answer:
six noble gases
Here are five of the six noble gases: helium, neon, argon, kypton and xeon. They're all colourless and transparent. Krypton and xeon form compounds only with difficulty. Helium, neon and argon don't form compounds at all.
Answer:
There are in total 6 noble gases in the periodic table.
Namely,
1. Helium
2. Neon
3. Argon
4. Krypton
5. Xenon
6. Radon
A small beaker contains 50 milliliters of water
at 20°C. If three sugar cubes are placed in the
beaker, they will eventually dissolve. Which
action would speed up the rate at which the
sugar cubes dissolve?
F) Use less water initially.
G) Transfer the contents to a larger beaker.
H) Cool the water and sugar cubes to 5°C.
J) Heat and stir the contents of the beaker.
How many molecules are in 0.89 moles of CO2
What are land plants used for?
Answer:
Land plants are also known as Embryophytes. Embryophytes are complex multicellular eukaryotes with specialized reproductive organs. The name derives from their innovative characteristic of nurturing the young embryo sporophyte during the early stages of its multicellular development within the tissues of the parent gametophyte.
Explanation:
Answer:
there used for mountains , wait I'm just trynna get points ya feel me
Explanation:
5) Check all the following boxes that are true about electrons
A) The number of electrons must be the same as the number of protons.
B) Changing the number can make atoms unstable.
C) They are mostly located in the nucleus (center) of the atom.
D) Electrons must be removed from the outer rings before they can be removed from
the inner rings.
E) The inner shell has a maximum number of 2 electrons
Other:
Answer:
Explanation:
A isnt true bc there can be isotopes
B: Yes that's true
C: C is false: only protons and neutron live in the nucleus
D that is true: we can see that with ions
E that is true
Electrons are important in chemical reactions. Since the elements in a family tend to behave similarly in chemical reactions, one may conclude that:
Answer:
One may conclude that they have an identical number of electrons in their outermost shell, therefore the can be substituted for one another.
Explanation:
Elements in the same family tend to behave similarly in chemical reactions because they have similar number of valence electrons in their outermost shell and they also have similar chemical properties.
Valence electrons are responsible for reactions between elements. The valence electron makes it possible for atoms to combine and react, therefore, elements in a family behave similarly in chemical reactions because they have an identical number of electrons in their outermost shell.
What is the amount of aluminum chloride produced from 40 moles of chlorine and excess aluminum?
Answer: Molar mass of Al = 26.98 g/mol
mass of Al = 12 g
mol of Al = (mass)/(molar mass)
= 12/26.98
= 0.4448 mol
According to balanced equation
mol of AlCl3 formed = moles of Al
= 0.4448 mol
Answer: 0.445 mol
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Explanation:
Solution made up of a
Answer:
solute and solvent
Explanation:
Because solutes dissolves in solvent to form a solution
A CANDLE WILL STAY LIT INSIDE THE SPACE SHUTTLE WHEN IT IS ON THE LAUNCH PAD, BUT NOT WHEN IT IS IN ORBIT. WHY?
Answer:
because there is no oxygen in space for it to burn
because all fire need oxygen to burn
Explanation:
13p 14n what is this element
Answer:
it is an isotope of Aluminum
Explanation:
Isotopes are the ones with the same number of protons but different number of neutrons.
The normal Aluminum is 13p+ and 13n. (13+13)