Answer:
9 moles
Explanation:
The balanced chemical equation for this decomposition reaction is as follows:
2KCIO3 → 2KCI+ 302
Based on this equation, 2 moles of potassium chlorate (KCIO3) decomposes to form 3 moles of oxygen gas (O2).
Hence, 6 moles of pottasium chlorate will decompose to produce;
6 × 3 ÷ 2
= 18 ÷ 2
= 9 moles of O2.
MgSO4 x 7H2O:
How
many molecules of
water are present
per magnesium
sulphate formulation
unit
Answer:In regards to writing the formula, we know that magnesium has a charge of 1+ and sulfate, SO4, has a charge of 1-. Sulfate is a polyatomic ion so the charge of the whole thing is (SO4)1-. When you combine them you end up with MgSO4 and the "heptahydrate" is seven water molecules.
Explanation:
Answer:
Iduno sorry po hsjsnaka
I went for a walk the other day. I went four blocks east, then seven blocks south, then one block west and finally
eight blocks north
a.What distance did I travel?
b. What's my displacement?
Answer:
a) distance is 4+7+1+8=20 blocks
b) displacement is 10 blocks
Explanation:
find displacement: x and y
x axis displacement = 4-1 = 3 blocks
y axis displacement = -7+8= 1 block
displacement = the square root of 3^2 + 1^2
= 9+1 = 10 blocks.
You can find the angle of displacement with respect to the initial position using trig identities, if you wish.
Sorry for spamming but this is due tomorrow! Can someone help me please!!
Answer:
1. in the Northern Hemisphere the vernal equinox falls about March 20 or 21, as the Sun crosses the celestial equator going north. In the Southern Hemisphere the equinox occurs on September 22 or 23, when the Sun moves south across the celestial equator.
Explanation:
Hope this helps ^^
Which method can be used to calculate the percentage composition of a
compound?
I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
True or False. Chemical changes only rearrange the elements that are
already present.
True or False. The reactants and the products of a chemical equation
always have the same number of atoms.
Here's link to the answer:
tinyurl.com/wpazsebu
which of the following is not found in cytoplasm
A.water
B.carbohydrates
C.salt
D.vitamins
Answer:
Carbohydrates
Explanation:
this is because cytoplasm is a substance that fills living cells.
Many ski resorts and mountain cities can be reached directly by planes which deposit travelers a mile or more above sea level. This can result in altitude sickness due to hypoxemia, or reduced oxygen in the blood, caused by the unaccustomed exposure to the lower atmospheric pressure at high elevations. On a given day, the prevailing atmospheric pressure in Albuquerque, NM (elevation 1620 meters) might be 0.799 atm. Calculate this pressure expressed in mmHg and in torr. Relationship between altitude and barometric pressure.
Answer:
See explanation
Explanation:
To convert from atm to mmHg
1 atm = 760 mmHg
0.799 atm = 0.799 atm * 760 mmHg/1 atm = 607.24 mmHg
To convert from atm to torr
1 atm = 760 torr
0.799 atm = 0.799 atm * 760 torr/1 atm = 607.24 torr
Using the diagram, which two planes would intersect in HG?
Answer please .. :)
Answer:
I think D
Explanation:
it has both H and G in the planes.
What is the molarity of 6.2 moles of NaCl in 2.5 L of water?
Full work plz
Molarity= no. of moles of solute/ volume of solution(in L)
Molarity = 6.2 moles/ 2.5 L = 62/25 mol/L
= 2.48 mol/L
help meeeeeeeeeeeeee
Answer:
XCl₂ + 2AgNO₃ —> X(NO₃)₂ + 2AgCl
The coefficients are: 1, 2, 1, 2
Explanation:
XCl₂ + AgNO₃ —> X(NO₃)₂ + AgCl
The equation can be balance as follow:
XCl₂ + AgNO₃ —> X(NO₃)₂ + AgCl
There are 2 atoms of Cl on the left side and 1 atom on the right side. It can be balance by writing 2 before AgCl as shown below:
XCl₂ + AgNO₃ —> X(NO₃)₂ + 2AgCl
There are 2 atoms of Ag on the right side and 1 atom on the left side. It can be balance by writing 2 before AgNO₃ as shown below:
XCl₂ + 2AgNO₃ —> X(NO₃)₂ + 2AgCl
Now, the equation is balanced.
The coefficients are: 1, 2, 1, 2
Which of the nine substances are made of four elements?
Answer:
Oxygen mucury carbon dioxide and platinum
Explanation:
What is needed to change a phase of matter?
The addition or subtraction of thermal energy. For example if you heat up an ice cube, it will melt to become water. If you heat it even more, it will evaporate.
Organisms are classified into different kingdoms based on?...
Answer:
Food and cell type
Explanation:
Kingdoms are by far the most basic legal structure for living objects. Living objects are classified into realms depending on how they consume food, the kinds of cells that produce their bodies, and the total type of tissue in their bodies.
is zinc an example of a metal or nonmetal?
Answer:
*Metal= iron, copper, aluminium, lead, Mercury, zinc, chromium, Nickel, gold, silver, Platinum. *Non-metal= sulphur, oxygen, nitrogen, Phosphorus, hydrogen, chlorine, Silicon, Iodine.
Explanation:
Answer:
Metal!!!
Explanation:
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. Zinc (Zn), chemical element, a low-melting metal of Group 12 (IIb, or zinc group) of the periodic table, that is essential to life and is one of the most widely used metals. Zinc (Zn) is an abundant metal, found in the Earth's crust, with a myriad of industrial and biological uses. ... A base metal, zinc is primarily used to galvanize steel, a process that protects the metal against unwanted corrosion.
classify the following elements under metals, non metals and metalloids, boron, zinc Mercury, silicon, oxygen, nitrogen, sodium
Answer:
Zinc mercury transition metal
Silicon boron metalloid
Oxygen nitrogen non metal
Sodium alkali metal
Explanation:
CaC2(s) + 2H2O(l) --> Ca(OH)2(aq) + C2H2(g) In the reaction above, 0.5487 grams of calcium carbide are completely consumed to produce acetylene gas, C2H2. What volume (in mL) will this gas occupy if it is collected at 43 degrees Celsius and 0.926 atm pressure
Answer:
239.7mL
Explanation:
Using the general gas equation;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas constant (0.0821 Latm/molK)
T = temperature (K)
The balanced chemical equation in this question is as follows:
CaC2(s) + 2H2O(l) --> Ca(OH)2(aq) + C2H2(g)
From the equation, 1 mole of CaC2 produces 1 mole of ethylene gas, C2H2.
Using mole = mass/molar mass
Molar mass of CaC2 = 40 + 12(2)
= 40 + 24
= 64g/mol
mole = 0.5487/64
mole = 0.00857mol of CaC2
Hence, 0.00857mol of CaC2 produced 0.00857mol of C2H2
Based on the information provided, n = 0.00857mol, T = 43°C = 43 + 273 = 316K, p = 0.926 atm
PV = nRT
V = nRT/P
V = 0.00857 × 0.0821 × 316/0.926
V = 0.222/0.926
V = 0.2397L
In mL, volume = 0.2397 × 1000
= 239.7mL
Circle all that apply for an anion.
a. Positively charged
b. Negatively charged
c. Metal
d. Nonmetal
e. Loses electrons when formed
f. Gains electrons when formed
g. Listed first in a compound
h. Listed second in a compound
Answer:
b. d. f. h
Explanation:
Anions are negatively charged. They are usually non metals with few exceptions. They need to gain electrons in order to form and they are always listed after cation in a compound.
do i have to know the chemical and physical properties of alloys? only chemistry students answer this.
Answer:
yes you do so you know how strong it is how maluble it's is so it can be customised to it's specific use
Answer:
alloy's properties are usually different from those of its component elements. Alloy constituents are usually measured by mass. Unlike pure metals, most alloys do not have a single melting point; rather, they have a melting range in which the substance is a mixture of solid and liquid.
physical properties of alloys:-Alloy steels have a wide range of special properties, such as hardness, toughness, corrosion resistance, magnetizability, and ductility. Nonferrous alloys, mainly copper–nickel, bronze, and aluminum alloys, are much used in coinage.
chemical properties of alloys:-Pure metals are useful but their applications are often limited to each individual metal's properties. Alloys allow metal mixtures that have increased resistance to oxidation, increased strength, conductivity, and melting point; Essentially any property can be manipulated by adjusting alloy concentrations.
dnt learn all thr properties.
these are the main properties..u can learn thse only. hope it will help u
Crossing a Dd parent with another Dd parent results in
Why would the presence of oxygen bubbles be a good indicator of photosynthesis occurring?
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??? Ipc helppp pllzz
Which of the following is a neutralization reaction?
a
SiCl4 + 4 H2O → H4SiO4 + 4 HC
b
HCl + NaOH → NaCl + H2O
c
6 CO2 + 6 H2O → C6H12O6 + 6 O2
d
2Al + 6HCl → 2AlCl3 + 3H2
Answer:
B
Explanation:
B, Hcl + NaoH = NaCl + H2O
WILL GIVE BRAINLIEST
How much heat energy is absorbed when 94.0 g of water is heated from 5.0C to 29.5C? Show your work.
Answer:
In order to be able to solve this problem, you will need to know the value of water's specific heat, which is listed as
c=4.18Jg∘C
Now, let's assume that you don't know the equation that allows you to plug in your values and find how much heat would be needed to heat that much water by that many degrees Celsius.
Take a look at the specific heat of water. As you know, a substance's specific heat tells you how much heat is needed in order to increase the temperature of 1 g of that substance by 1∘C.
In water's case, you need to provide 4.18 J of heat per gram of water to increase its temperature by 1∘C.
What if you wanted to increase the temperature of 1 g of water by 2∘C ?
This will account for increasing the temperature of the first gram of the sample by n∘C, of the the second gramby n∘C, of the third gram by n∘C, and so on until you reach m grams of water.
And there you have it. The equation that describes all this will thus be
q=m⋅c⋅ΔT , where
q - heat absorbed
m - the mass of the sample
c - the specific heat of the substance
ΔT - the change in temperature, defined as final temperature minus initial temperature
In your case, you will have
q=100.0g⋅4.18Jg∘C⋅(50.0−25.0)∘C
q=10,450 J
Which statement is true about solids?
Their particles can flow over one another, so they have a fixed volume but no fixed shape.
Their motionless particles are packed together in a fixed arrangement.
Their vibrating particles are packed together in relatively fixed positions.
Their fast-moving particles can expand to take the shape of their container.
Answer:
3
Explanation:
Answer:
Their vibrating particles are packed together in relatively fixed positions.
Explanation:
As you can see in the image below, solid is packed together.
Does a animal cell have cytolysis?
Answer:
The presence of a cell wall prevents the membrane from bursting,so cytolysis only occurs in animal and protozoa cells which do not have cell walls.
Explanation:
Help quickly pleaaas
Answer:
chymotrypsin, cleaves peptide bonds selectively on the carboxylterminal side of the large hydrophobic amino acids such as tryptophan, tyrosine, phenylalanine, and methionine
Under certain conditions butane reacts with oxygen to form butanone which can be easily hydrogenated to butanol. Butene is easily made from butanol by elimination of water.
Explanation:
These are for the first too
1 point
have specific requirements that need to be met in order for an
entrepreneur to be considered.
O Loans
O Investments
O None of the other answers
O Grants
The ______ properties of a substance can be observed only when it undergoes a change to become an entirely different kind of substance with different properties.
Enter the answer
Answer:chemical
Explanation:
Please help me with this
choose the correct one
Answer:
B. More reactant is added.
Explanation:
The question basically asks at which condition would the forward reaction be favoured.
The law of equilibrium states when a system at equilibrium is disturbed by, it would annul that change. In order to increase the forward reaction, more of the reactant should be added. In order to annul this change, the system would have to favour the reaction that deals with reducing the amount of reactant added.
The correct option is;
B. More reactant is added.
