Answer:
Sorry I dont know I just need points
Explanation:
Have a good day :)
Answer: Lead Nitrate combines with HYDROGEN PEROXIDE, REDUCING AGENTS, POWDERED CARBON, LEAD HYPOPHOSPHITE, AMMONIUM THIOCYANATE, POTASSIUM ACETATE, and POWDERED METALS. Lead Nitrate is a Powerful OXIDIZER that can ignite ORGANIC and COMBUSTIBLE MATERIALS.
Explanation:
What is the molecular geometry of a molecule with 4 outer atoms and 1 lone pair on the central atom?
Answer:
See explanation
Explanation:
The valence shell electron pair repulsion theory states that; the number of electron pairs present on the valence shell of the central atom in a molecule is the final determinant of shape of the molecule.
Based on this theory, the electron domain geometry of a molecule having 4 outer atoms and 1 lone pairs on the central atom should be based on a trigonal bipyramid. The molecular geometry of this molecule is see saw with a bond angle of <90 degrees(axial) and <120 degrees(equatorial).
How many moles does 21.7 L of gas at STP represent?
Answer:
The number of moles represented by 21.7 L is 0.96875 moles
Explanation:
The volume occupied by one mole of a gas which consists of (approximately) 6.022 × 10²³ elementary at STP is 22.4 L. The volume is known as the molar volume of gas
Therefore, the number of moles, 'n', present in 21.7 L of gas at STP is given as follows;
The number of moles represented by 22.4 L = 1 mole
∴ The number of moles represented by 21.7 L = 1 mole/22.4 L × 21.7 L = 0.96875 moles
The number of moles represented by 21.7 L = 0.96875 moles.
Help me in this question please (No links!!.)
Answer:
Density = mass/volume so the answer is 6g/ml
Explanation:
Which option identifies what might change Larry's mind in the following scenario? Larry is not interested in participating in his neighborhood's recycling program because he thinks it is too much of a hassle. offering a dual-stream recycling program o providing bins for each recyclable material O simultaneous trash and recycling collection offering a single-stream recycling program Save and Exit Mark this and return Sign
Answer:
providing bins for each recyclable material could change Larry's mind, coz in return of unnecessary things of household she's getting bins in return so she might get interested!
How to know the state of elements in a reaction
Answer:
each compound or molecule is indicated in subscript next to the compound by an abbreviation in parentheses. For example, a compound in the gas state would be indicated by (g), solid (s), liquid (l), and aqueous (aq).
Explanation:
How many molecules are in 8.78 moles of oxygen gas
Answer:
11 g
Explanation:
1. Friction acts in a direction
to the
direction of an object's motion.
a. unrelated
b. opposite
c. equal
d. perpendicular
Friction acts in the opposite direction to the direction of an object's motion. Therefore, option (b) is correct.
What is Friction?Friction can be defined as the resistance provided by the surfaces that are in contact when they pass over each other. Friction offers the traction that is required to walk without slipping.
Friction can be described as a force that is dependent on external factors. Friction depends upon the nature of the two surfaces that are in contact and on the smoothness or roughness of the two contacted surfaces. When one body moves over the surface of another, these irregularities on the surface of the bodies get entangled and develop friction.
Friction depends upon the force that is exerted on these surfaces and increases when the force is applied along with the irregularities. Types of Friction are Rolling friction, Static friction, Sliding friction, and Fluid friction.
The force of friction acts in the opposite direction to the direction of an object's motion.
Learn more about friction, here:
https://brainly.com/question/13000653
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what is glue made up of
Answer:
Glue is made up of - combination of polyvinyl acetate (PVA), water, ethanol, acetone and other substances. The animal remains that are the raw materials for glue may include ears, tails, scraps of hide or skin, scrapings from the fleshy sides of hides, tendons, bones and collagen taken from animal parts, particularly horse hooves and bones.
Explanation:
Oof hope this helps =)
Answer:
Synthetic glues and adhesives are made from polyvinyl acetate, water, ethanol, acetone and some other substances. The water is used to modify the glue's consistency while the other substances are used to control the drying rate of the glue.
What is the name of the element represented in the model?
O A. Beryllium
B. Boron
O C. Oxygen
O D. Flourine
Answer:
Your answer is B
Boron
Good luck
Explanation:
Science please help. I will add you and please don’t give me any random websites
Answer:
C
Explanation:
Answer:
D)
Explanation:
On land, volcanoes form when one tectonic plate moves under another. Usually a thin, heavy oceanic plate subducts, or moves under, a thicker continental plate. When this happens, the ocean plate sinks into the mantle.
WHAT IS THE PH OF LEMON JUICE IF IT HAS A HYDROGEN ION CONCENTRATION [AT]ON[H^ + ]=5.0*10^ -2 M.
Can somebody help me please !!!!!!
Answer:
ph=2
Explanation:
what is the difference between isotopes and allotrope not more than three line
Answer:
An allotrope is one way that atoms can be arranged in a solid. An isotope is one way that protons and neutrons can form the same atomic element.
Which of the following groups of chemical elements would you expect to
be most alike in their physical and chemical properties?
A. Chromium, rhodium, zinc, silicon
B. Magnesium, strontium, radium, barium
C. Lithium, beryllium, boron, oxygen
D. Sulfur, selenium, chlorine, krypton
Answer: B. Magnesium, strontium, radium, barium
Explanation:
Elements are distributed in groups and periods in a periodic table.
Elements that belong to same groups will show similar chemical properties because they have same number of valence electrons.
Magnesium (Mg) , Strontium (Sr) , Radium (Ra) and Barium (Ba) are elements which belong to Group 2. They have 12, 38, 88 and 56 electrons respectively and contain 2 valence electrons each and need one electron to complete their octet.
The chemical reactivity of elements is governed by the valence electrons present in the element and thus they are alike in physical and chemical properties.
how many grams of chromium are needed to react with of cuso4 to produce 10.2g cu
Answer:
14.7 g of chromium
Explanation:
The ability of a match to burn is an example of a physical property.
Answer:
true
Explanation:
what are the chemical symbols of the particles found in the calcium chloride crystal (lattice)
Answer:
Formula and structure: The chemical formula of calcium chloride is CaCl2, and its molar mass is 110.983 g/mol. It is an ionic compound consisting of the calcium cation (Ca2+) and two chlorine anions (Cl-). The bivalent calcium metal forms an ionic bond with two chlorine atoms, as shown below.
Based on the ionic nature of calcium chloride, the chemical symbols of the particles found in the calcium chloride crystal is Ca²⁺ and Cl⁻.
What are ionic compounds?
Ionic compounds are compounds which are composed of ions.
Calcium chloride is an ionic compound composed of the ions, calcium ions and chloride ions.
The chemical formula of calcium chloride is CaCl2, and its molar mass is 110.983 g/mol.
The symbol for calcium ion is Ca²⁺
The symbol for chloride ion is Cl⁻.
Therefore, the chemical symbols of the particles found in the calcium chloride crystal is Ca²⁺ and Cl⁻.
Learn more about ionic compounds at: https://brainly.com/question/11638999
PLEASE ANSWER THESE QUESTIONS FOR 21 POINTS AND A BRAINLIEST, KEEP IN MIND THESE QUESTIONS ARE VERY IMPORTANT AND WILL DETERMINE MY GRADE!!!!(NO GUESSING, SPAMMING OR LINKS)
This is energy that is stored for later use.
kinetic energy
potential energy
mechanical energy
electromagnetic energy.
A ball rolling down the hill is an example of ___ energy.
1 point
Kinetic
Potential
Electrical
Sound
Requires two parents
1 point
Sexual reproduction
Asexual Reproduction
Small grains that contain a plant's male reproductive cells.
1 point
stamen
pollen
pistil
stigma
C, D , and E are collectively known as the ______.
1 point
Captionless Image
stamen
anther
sepal
pistil
Small leaf-like structures forming an outer circle at the base of a flower.
1 point
petals
sepal
stigma
pistil
The stalk that supports or holds up the anther is the
1 point
style
filament
ovary
pistil
A flower structure that encloses and protects ovules and seeds as they develop.
1 point
Petal
Ovule
Stigma
Ovary
the part of the ovary of seed plants that contains the female germ cell and after fertilization becomes the seed.
1 point
Ovule
Style
Stamen
.Pistil
Supports the stigma, serves as passageway for pollen
1 point
Anther
Style
Stem
Ovule
Renewable energy resources are?
1 point
A resource that cannot be readily replaced by natural means on a level equal to its use.
Invisible resources
Renewable resources that can be naturally restored.
All the above
Coal and oil are?
1 point
Non-Renewable energy resources
Renewable energy resources
None of the above
Bio-fuel and geothermal energy are examples of?
1 point
Non-renewable energy resources
Hydro energy
Renewable energy resources
None of the above
What is the name of flower part #10 ?
1 point
Captionless Image
sepal
pollen tube
filament
stigma
Which of the following is NOT a Natural Resource?
1 point
Coal
Paper
Solar
Wind
What is the disadvantage of using non-renewable resources?
1 point
They have a large carbon footprint.
They can all be used up over time.
They can lead to global warming.
All of these.
how does this data provide evidence for base pairing in dna
Answer:
There are chemical cross-links between the two strands in DNA, formed by pairs of bases. They always pair up in a particular way, called complementary base pairing: thymine pairs with adenine (T–A) guanine pairs with cytosine (G–C)
Explanation:
Hope it helps u
FOLLOW MY ACCOUNT PLS PLS
Which substance is the BEST example of a compound?
Orange Juice
Salt Water
Hydrogen
Water
Answer:
I think hydrogen because Hydrogen combined with one atom with oxygen and in hydrogen peroxide. It has two atoms of hydrogen and 2 atoms of oxygen. Therfore it should be a compound.
2. Energy that is stored in an object because of its temperature is called ___________________. *
Answer:
Thermal Energy
Explanation:
The thermal energy of an object increases as the temperature increases, causing atoms and molecules to move faster. When the temperature decreases, the thermal energy decreases, causing atoms and molecules to move slower. Another term for thermal energy is heat energy.
How many moles are in 3.25 x 1025 molecules of H2O?
Answer:
[tex]27.72 g[/tex]
Explanation:
The relationship between the number of particles and the number of mole of a substance is given by the equation N = n L ; where N is the number of particles, n is the number of mole, and L is Avogadro's constant.
can someone do this for me i wasent there when we learned it
The heart works directly with which
Liver
Lungs
Kidneys
Brain
Answer:
Lungs.
Explanation:
They bring the blood throughout the body, to help it function properly
DUE TONIGHT!
I need help doing this question and please type an ACTUAL answer. I don’t want none of that “aNsWeR iN FiLe”. Thank you!
Calculate the specific heat (Cp) for indium metal given a 1.0 mole absorbs 53.0 J
while increasing in temperature from 297.5K to 299.5K.
Answer:
27J/Kmol
Explanation:
Heat = number of moles times the Moeller heat capacity chimes the change in temperature.
^ Q = nC△T
^ C = Q/ n△T = +53J / (1mol) (299.5K - 297.5K)
^ = 26.5 (rounded to 27)
2Fe(OH)3 Fe2O3+3H2O how many grams of Fe2O3 are produced if 10.7 grams of Fe (OH)3 react in this way
Answer: 7.98 grams of [tex]Fe_2O_3[/tex] are produced if 10.7 grams of [tex]Fe(OH)_3[/tex] are reacted.
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] .....(1)
Putting values in equation 1, we get:
[tex]\text{Moles of} Fe(OH)_3=\frac{10.7g}{106.87g/mol}=0.100mol[/tex]
The chemical equation for the reaction is
[tex]2Fe(OH)_3\rightarrow Fe_2O_3+3H_2O[/tex]
By Stoichiometry of the reaction:
2 moles of [tex]Fe(OH)_3[/tex] produce = 1 mole of [tex]Fe_2O_3[/tex]
So, 0.100 moles of [tex]Fe(OH)_3[/tex] produce= [tex]\frac{1}{2}\times 0.100=0.05mol[/tex] of [tex]Fe_2O_3[/tex]
Mass of [tex]Fe_2O_3[/tex] =[tex]moles\times {\text{Molar Mass}}=0.05mol\times 159.69g/mol=7.98g[/tex]
Hence 7.98 grams of [tex]Fe_2O_3[/tex] are produced if 10.7 grams of [tex]Fe(OH)_3[/tex] are reacted.
How many mililiters are there in a .5 M solution in which 60 grams of Li?
Answer:
10
Explanation:
Evidence of a chemical change would be
A) melting
B) spinning top
C) spilled bucket of water
D)rusting car fender
A sample of Xe gas is observed to effuse through a pourous barrier in 4.83 minutes. Under the same conditions, the same number of moles of an unknown gas requires 2.29 minutes to effuse through the same barrier.
The molar mass of the unknown gas is
_____ g/mol.
Answer:
28.93 g/mol
Explanation:
This is an extension of Graham's Law of Effusion where [tex]\frac{R1}{R2} = \sqrt{\frac{M2}{M1} } = \frac{t2}{t1}[/tex]
We're only talking about molar mass and time (t) here so we'll just concentrate on [tex]\sqrt{\frac{M2}{M1} } = \frac{t2}{t1}[/tex]. Notice how the molar mass and time are on the same position, recall effusion is when gas escapes from a container through a small hole. The time it takes it to leave depends on the molar mass. If the gas is heavy, like Xe, it would take a longer time (4.83 minutes). If it was light it would leave in less time, that gives us somewhat an idea what our element could be, we know that it's atleast an element before Xenon.
Let's plug everything in and solve for M2. I chose M2 to be the unknown here because it's easier to have it basically as a whole number already.
[tex]\sqrt{\frac{M2}{131} } = \frac{2.29}{4.83}[/tex]
The square root is easier to deal with if you take it out in the first step, so let's remove it by squaring each side by 2, the opposite of square root essentially.
[tex](\sqrt{\frac{M2}{131} } )^2= (\frac{2.29}{4.83})^2[/tex]
[tex]{\frac{M2}{131} } = (0.47)^2[/tex]
[tex]{\frac{M2}{131} } = 0.22[/tex]
M2= 0.22 x 131
M2= 28.93 g/mol
A ball is sitting at the top of a ramp. As the ball rolls down the ramp, the potential energy of the ball decreases. What happens to the potential energy as the ball moves
Answer:
it is converted to kinetic energy
Which reaction occurs when equivalent quantities of H" (or H30) and OH" are mixed?
1.
oxidation
2.
reduction
3
hydrolysis
4.
neutralization
Answer: A reaction which occurs when equivalent quantities of H" (or [tex]H_{3}O^{+}[/tex]) and OH" are mixed is a neutralization reaction.
Explanation:
When acid and base chemically combine together to form sat and water then it is know as neutralization reaction.
An acidic substance gives hydrogen ions [tex](H^{+})[/tex] on dissociation and a basic substance gives hydroxide ions [tex](OH^{-})[/tex] on dissociation.
For example, [tex]H^{+} + OH^{-} \rightarrow H_{2}O[/tex] is a neutralization reaction where an acid and base are mixed together to form water.
No salt is formed as because here the reactants are not present as compounds.
In a hydrolysis reaction, water molecule(s) is added to the reactant molecules.
For example, [tex]CH_{3}COOCH_{3} + H_2O \rightarrow CH_{3}COOH + CH_{3}OH[/tex]
Oxidation is the process of addition of oxygen to a molecule and removal of hydrogen.
Reduction is the process of addition of hydrogen in a compound and the removal of oxygen atom.
Therefore, we can conclude that reaction which occurs when equivalent quantities of H" (or [tex]H_{3}O^{+}[/tex]) and OH" are mixed is a neutralization reaction.