Answer:
approximately 15.1 grams.
Explanation:
The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want.
change 25 grams of potassium chlorate to moles.
calculate the gram molecular mass of potassium chlorate.
Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron.
1 K x 39 grams/mole
+1 Cl x 35.4 grams/ mole
+3 O x 16 grams/ mole
= 122.4 grams / mole Potassium Chlorate
25
122.4
= moles.
2.05 moles of Potassium Chlorate.
There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride.
2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride.
Find the gram molecular mass of Potassium Chloride.
1 K x 39 = 39
+1 Cl x 35.4 = 35.4
= 74.4 grams / mole.
2.05 moles x 74.4 grams/ mole = 15.2 grams
Hope it helps :)
Answer:
9.79g of O2
Explanation:
So this question you are trying to go from g of KCLO3 to grams of oxygen. There is no direct conversion so you have to utilize multiple process.
[tex]25.0g KCLO3 * \frac{1mol KCLO3}{122.55 gKCLO3} * \frac{3mol O2}{2 mol KCLO3} * \frac{32.00g O2}{1mol O2}[/tex]
=9.79 g of O2
So first you go from g of KCLO3 to moles of KCLO3 by using molar mass of KCLO3. Then you use mol:mol ratio from balanced equation to go to moles of O2, and finally use molar mass of O2 to go to grams of O2.
In which diagram would the block of wood have the greatest acceleration?
Answer:
The answer is B.
Explanation:
There is more Newton force pushing it and since it's on a flat surface it moves more than a higher kg weight block.
According to the unbalanced equation: KCIO3 → KCI + O2 how many
moles of potassium chlorate are needed to produce 6.51 moles of oxygen?
Answer:
06
Explanation:
Elements found in the same period on the periodic table have the same...
Group of answer choices
Number of neutrons
Number of Valence Electrons
Number of Energy Levels
Properties
Answer:
valence electrons
Explanation:
What is one way engineers have used a material like oobleck to help people?
Answer:
Oobleck has been used to manufacture shoes, filling of portholes, making bullet proof vest.
Explanation:
Oobleck is a non Newtonian fluid which is made from mixture of cornstarch and water. It has both liquid and solid properties. Its act like a liquid when is poured and as a solid when a force act on it. It is a substance that is use in manufacturing shoes. The inside layer of shoes is made of it. It's viscosity increases when there is shear stress. It is use for filling portholes
Answer:
The research could enhance protection of police and soldiers and create softer robots. This cornstarch and water mixture, known as “oobleck,” is a shear thickening liquid that can rapidly switch between a liquid-like and a solid-like state in response to externally applied stress.
Explanation:
how many molar mass are in BeCl2?
Answer: 79.9182 g/mol
please answer ASAP which of the following represents gamma emission? picture attached
Answer:
The answer is A.
Explanation:
A P E X
Gamma radiation arises from the radioactive decay of the nuclei along with the release of γ. The reaction of the Technetium (Tc) element represents the gamma decay. Thus, option A is correct.
What is gamma decay?Gamma packets are the energy packets released in the radioactive decay reaction where the particle undergoing decay does not have a change in the number of protons or neutrons but instead moves the nucleus from higher to lower energy levels. The gamma emission is depicted by,
⁹⁰Tc₄₃ → ⁹⁰Tc₄₃ + γ
In the gamma decay of the Technetium element, the nucleus from the higher energy lowers and produces the same elements along with a gamma photon.
In gamma decay, the unstable nuclei dissipate energy in the form of gamma rays or photons. In this type of radioactive decay, the element in the reactant and the product are the same.
Therefore, a reaction involving Tc is an example of gamma emission.
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How can a scientist ensure that his or her data are reliable? by making a single observation by repeating trials during an experiment by recording values without units by keeping the results private
Answer:by repeating trials during an experiment.
Explanation:
.
Answer:
its b
Explanation:
what tool do you have to use to find the mass of a small pumpkin? A beaker B balance C stopwatch D meter stick E thermometer F graduated cylinder
Answer: Balance (B.)
Explanation:
Balances are used to measure mass.
Beakers and graduated cylinders measure volume. Stopwatches measure time. Meter sticks measure length. Thermometers measure temperature.
Which has most likely been peer reviewed?
O an article on the benefits of eating cheese, featured in Crosscreek Dairy Monthly magazine
O an article on the benefits of wearing shoe inserts, featured in Bob's Footwear circular
an article on the beneficial bacteria in yogurt, featured in Medical Journal of Gastroenterology
O an article on beneficial face creams, featured in Beauty and You magazine
Answer:
an article on the beneficial bacteria in yogurt, featured in Medical Journal of Gastroenterology
Explanation:
This article is published in a Medical Journal, which means the contents must be credible, informative, and accurate. In order to be these things, the author most likely had others review their writing to remain objective and ensure quality work. The other articles are not meant to solely inform and are featured in less credible magazines. Therefore, the third option is correct.
Answer:
an article on the beneficial bacteria in yogurt, featured in Medical Journal of Gastroenterology
Explanation:
How do you know when a phase change happens?
Answer:
phase for what?
Explanation:
if i have about 68.2 grams of H2S, how many moles do i have?
Answer:
2.1 mol
Explanation:
68.1g / 34.1 g/mol = 2.1mol
Which represents the balanced nuclear equation for the beta minus decay of Co-60?
Superscript 60 subscript 27 upper C o right arrow superscript 60 subscript 26 upper F e plus superscript 0 subscript plus 1 e.
Superscript 60 subscript 27 upper C o right arrow superscript 60 subscript 28 upper N i plus superscript 0 subscript negative 1 e.
Superscript 60 subscript 27 upper C o plus superscript 0 subscript plus 1 e right arrow superscript 60 subscript 28 upper N i.
Superscript 60 subscript 27 upper C o plus superscript 0 subscript negative 1 e right arrow superscript 60 subscript 26 upper Fe.
Explanation:
Superscript 60 subscript 27 upper C o right arrow superscript 60 subscript 28 upper N i plus superscript 0 subscript negative 1 e.
Answer:
Its B
Explanation:
Did the test and got 100%
Natural disaster that happened in San Angelo ?
Answer:
The National Weather Service
Tornadoes
Explanation:
The National Weather Service
Tornadoes
happen in San Angelo.
Hope this helps
When volcanoes errupt, they can release oxides of sulphur that react with tiny droplets of water in the air to form sulphuric acid. Sulphuric acid can be considered a(n) __________.
A)
greenhouse gas
B)
primary pollutant
C)
biofuel
D)
secondary pollutant
E)
ecotone
what term is best associated with protons or neutrons escaping to become more stable?
A. Nucleus
B. Radioactive Decay
C. Quark Deterioration
D. Particle Transfer
!: (a) 20 cm: 80
10. Some mercury is poured into a capillary tube of
uniform bore and one end closed. When the tube
is held horizontally, mercury column has a length
of 4 cm and air enclosed in the closed end has a
length of 10 cm. If the tube is now held vertically,
with open end upwards, the length of the air
column will be (take atmospheric pressure at the
Tale place of experiment to be 760 mm)....
(a) 10.5 cm . (6) 8.5 cm ",JI
(c) 9.0 cm mati (d) 9.5 cm 0
Answer:
THE LENGTH OF THE AIR COLUMN IS 9.5 CM
Explanation:
Taking the atmospheric pressure to be 760 mmHg;
When the capillary tube is held horizontally, the pressure of the tube is 760 mmHg
when the capillary tube is held vertically, the pressure increases by 4 cm = 40 mm
The new pressure of the tube is hence, 760 + 40 mmHg = 800 mmHg
Using the pressure forlmula;
P1 V1 = P2 V2
P1 A1 L1 = P2 A2 L2
where A1 and A2 is the area of the capillary tube and it is equal, it cancels out.
P1 l1 = P2 l2
l2 = P1 l1 / P2
l2 = 760 * 10 / 800
l2 = 9.5 cm
The length of the air in the tube is 9.5 cm.
Malik analyzed three samples to test which element was a metalloid. The table shows his results. A 7-column table with 3 rows. The first column titled element has entries A, B, C. The second column titled lustrous has entries yes, no, yes. The third column titled brittle has entries no, yes, yes. The fourth column titled how it reacts has entries base, acid, acid or base. The fifth column titled boiling point (degrees C) has entries not observed, negative 34.04, not observed. The sixth column titled melting point (degrees C) has entries 97.72, not observed, 1413.85. The seventh column titled electrical conductivity has entries high, very low, medium. Which element (A, B, or C) is most likely a metalloid?
Answer:C is most likely a metalloid
Explanation:A is a metal while B is a non metal. This is because when we look at the properties of metals, they are very lustrous and have a high conductivity. On the other hand, non metals are the opposite but metalloids have properties the are inbetween ie, they react with either an acid or base, and have a medium electrical conductivity unlike metals(high) anc non metals(low).
Answer:
Malik analyzed three samples to test which element was a metalloid. The table shows his results.
A 7-column table with 3 rows. The first column titled element has entries A, B, C. The second column titled lustrous has entries yes, no, yes. The third column titled brittle has entries no, yes, yes. The fourth column titled how it reacts has entries base, acid, acid or base. The fifth column titled boiling point (degrees C) has entries not observed, negative 34.04, not observed. The sixth column titled melting point (degrees C) has entries 97.72, not observed, 1413.85. The seventh column titled electrical conductivity has entries high, very low, medium.
Which element (A, B, or C) is most likely a metalloid?
✔C
Explanation:
Edge 2021
The figure is a square. Its diagonals meet to form four right
angles. What is the approximate value of x?
O 2.8 units
O 3.3 units
O 4.0 units
O 5.7 units
Answer:
D
Explanation:
ed2020
The approximate value of x is 5.7 units. It can be determined by Pythagoras' theorem. Therefore, option D is correct.
What is Pythagoras' theorem?Pythagoras' theorem is a fundamental theorem in mathematics. It describes the relationship between the sides of a right-angled triangle. It states that the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides. Mathematically it is expressed by: H² = B² + P²
Given,
Base = x units
Perpendicular = x units
Hypoteneus = 8 units
The triangle formed in the figure is a right-angle triangle.
Thus, by Pythagoras' theorem,
H² = B² + P²
8² = x² + x²
64 = 2x²
x² = 64/2
x² = 32
x = √32
x = 5.7 units
Therefore, the correct option is D.
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You are shown a liquid that looks the same throughout. You are told it contains more then one element in varying proportions. Is the liquid an element, a compound or a mixture? Give a reason why.
Answer:
It is a mixture
Explanation:
An element comprises of a single type which exists on its own.
A compound comprises of two or more which are bonded together chemically
A mixture comprises of different substances which are combined physically.
HELP. what are van der waals forces?
Answer: Examples of van der Waals forces include hydrogen bonding, dispersion forces, and dipole-dipole interactions.
Explanation:
11. What is the maximum number of electrons that an atomic orbital can contain?
2
32
8
1
Answer:
2
Explanation:
Each orbital can hold two electrons. One spin-up and one spin-down.
In birds, having long feathers (L) is dominant to short feathers (l). A homozygous dominant bird and homozygous recessive bird mate. After creating a punnett square, give the genotypes and phenotypes of the four resulting offspring (include the number of each)
Answer:
The four are Ll
The four will have long feathers
Explanation:
A Punnett square is a graphical representation of all possible genotypes of an offspring that is likely to arise from a particular cross or breeding event. To create a Punnett square, knowledge of the genetic composition of the parents is highly required. The two things a Punnett square can tell you are the genotypes and phenotypes of the offspring. In its simplest form, the Punnett square consists of a square divided into four quadrants. A Punnett square allows the prediction of the percentages of phenotypes in the offspring of a cross from known genotypes.
The genotypes of the four offsprings are Ll, Ll, Ll and Ll. This implies that they are all heterozygous. They will all have long feathers since the long feather (L) is dominant in all the species. In terms of phenotype, they will all have long feathers.
wht kind of particles contribute to an overall heating effect on climate?
Answer: Aerosols like sulfur, nitrate, and organic carbon are formed in the atmosphere and cause global cooling. Thereby they contribute to mask parts of the human induced global warming. On the other hand, black carbon absorbs radiation and thereby has a warming effect on the earth's climate. -science daily
Explanation: please mark me brainiest. i need one to get a higher rank :/
Answer:
Aerosols like sulfur, nitrate, and organic carbon are formed in the atmosphere and cause global cooling. Thereby they contribute to mask parts of the human induced global warming. On the other hand, black carbon absorbs radiation and thereby has a warming effect on the earth's climate
Explanation:
google hope this helps you
how much will 3 moles of Mg(OH)2 weigh?
Answer:
174.9591 Grams mate :) have a good day ily
Explanation:
8 points
11. Humans have negatively impacted the environment for years. Which
events represent ways humans have harmed the environment. (Choose all
that apply.)
burning fossil fuels
minning
planting trees
using solar power
using fertilizers
recycling
Answer:
Burning fossil fuels
Mining
Using fertilizers
Which is a physical change?
strawberries liquefied in a blender
strawberries cooked into jelly
strawberries left out to mold
Answer: Strawberries liquefied in a blender
Explanation:
The dotted line between 0- and H+ represents a
-0)
A)
covalent bond between the two oppositely charged ions.
B)
o
hydrogen bond, a weak bond between a hydrogen and an electronegative
atom.
strong, short-distance bond that is responsible for the unique properties of
water.
polar covalent bond that results from the unequal and opposite charges of
the ions.
D)
Answer:
hydrogen bond, a weak bond between a hydrogen and an electronegative
atom.
Explanation:
Hydrogen bonding, is an intermolecular or intramolecular interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces. Hydrogen bonds can exist between atoms in different molecules or in parts of the same molecule.
A hydrogen bond is a type of dipole-dipole interaction; it is not a true chemical bond. These attractions can occur between molecules (intermolecularly) or within different parts of a single molecule (intramolecularly) as explained above.
Oxygen is strongly electronegative. Hydrogen bonds are observed when hydrogen is bonded to strongly electronegative species such as oxygen. Hydrogen bonds account for the high boiling point of water.
Which of the following happens to a molecule of an object when the object is cooled?
O its temperature increases.
It loses kinetic energy.
O its size increases.
It moves faster
Question 16 Multiple Choice Worth 1 points)
(01.02 MC)
ro
The molecular theory states the movement and collision of the molecules in a matter. When an object is cooled, then the molecule loses its kinetic energy. Thus, option B is correct.
What is the kinetic molecular theory?The kinetic molecular theory explains the composition and the motion of the particles in matter. It assumes that the particles move constantly in the matter and have insignificant volume and intermolecular forces.
The particles show elastic collisions that use the ideal gas equation to show the effect of the temperature on the kinetic energy. The kinetic energy has a direct relationship with the temperature.
A decrease in temperature(cooling) of matter causes the particles to slow down their speed of collision which results in a loss in kinetic energy and is used as the principle to change liquid into solids.
Therefore, option B. the decrease in temperature reduces the kinetic energy.
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What is the difference between endothermic reactions and exothermic reactions? (Please describe both types of chemical reactions.)
Answer:
Explanation:
Endothermic reactions absorb energy from the surrounding, but exothermic reactions release energy to the surrounding.
What amount of moles does 60.5 L of carbon dioxide occupy at 2.15 atm and 25 degrees C?
4.3 moles
5.3 moles
9.3 moles
2.5 moles
Answer: 5.3 moles
Explanation:
Hi, to answer this question we have to apply the next formula:
n = PV/RT
Where:
n = number of moles
P= Pressure = 2.15 atm
V= volume = 60.5 L
R = 0.0821 atm(L)/mol(K)
T = temperature = 25 °+ 273.15 = 298.15 Kelvin
Replacing with the values given:
n = 2.15 (60.5) / 0.0821 (298.15) = 5.3 moles.
Feel free to ask for more if needed or if you did not understand something.