Answer:
B.cesium (Cs)
Explanation:
Reactivity for metals is that it increases as you go down and decreases as you go right.
Answer:strontium (Sr)
Explanation:
PLZ HELP SCHOOL STARTS TMR AND I NEED THIS DONE BY 2NIGHT. ILL GIVE BRAINLIEST
Answer:
Filtration separates solids of different sizes.
Distillation takes advantage of differences in boiling points.
Evaporation removes a liquid from a solution to leave a solid material.
3. What might be the formula for calculating speed?
4. What might be the formula for calculating distance?
spe
5. What might be the formula for calculating time?
(m/s)
6. What might be the units for speed?
Answer:
3)The formula for speed is
speed=distance ÷ time
distance is in metres (m)
and time is in seconds (s),
so the units will be in metres per second (m/s).
4)to solve for distance use the formula for distance d = st, or distance equals speed times time. ... You can use the equivalent formula d = rt which means distance equals rate times time. distance = rate x time.
5)To solve for time use the formula for time,
t = d/s which means time equals distance divided by speed.
6)The SI unit of speed is the metre per second, but the most common unit of speed in everyday usage is the kilometre per hour.
please mark me as a brain list
Mass of the Graduated Cylinder
(only air)(g) Mass of the Graduated Cylinder with
Water (g) Calculated Mass of Water (g)
73.7 73.7 0.0
A student collected the above data for this experiment. What error did he make? Explain.
Answer:
If there is water in the graduated cylinder and what is required is the exact amount of water, then the instrument used to measure the mass is not that accurate. Having only one decimal place is not enough to detect the mass of water in the cylinder.
Explanation:
Which element is in the same group as carbon?
look at the attached photo
Answer:
B. Germanium
Explanation:
Since the carbon group element consists of carbon, germanium, etc. Germanium is in the same group as carbon.
how do we know that a chemical reaction occured
Answer: signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
Explanation:
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1. MnO₂ is an example of what type of bond?
a covalent
b ionic
c polyatomic ion
2. Cl is an example of a cation, anion, or polyatomic ion
a polyatomic ion
b anion
c cation
Answer:
1. covalent
2. polyatomic ion
Explanation:
:)
Answer:
1) b
2)c
Explanation:
Knowing that the molar mass of the compound is 46.069 grams/mole, use the formula weight calculated in part C to
determine the molecular formula.
Select the correct answer from each drop-down menu.
С_H_O_
Answer:
C2H2O1
Explanation:
I got it right on plato :>
C2H6O1 is the correct answer.
what is a chemical change of a book
be quick
Answer:
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. ... An example of a chemical change is the reaction between sodium and water to produce sodium hydroxide and hydrogen.
Explanation:
The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. Analyzing the reactants and products of a given reaction will allow you to place it into one of these categories.
Plasma is the most common state of matter in the?
Earth's atmosphere
Earth's crust
oceans
universe
Answer:
Universe
Hope its helpful
Thank you
Scientists use bacteria to make medicines,
o True
o False
Answer:
true they do I yes they do
how many moles is 135 L of ammonia gas at STP
Answer:
i
Explanation:
A student has a cube with each side is 4 cm in length, what is the volume? What is the measurement unit? Select ALL that apply.
Answer:
64cm^3
Explanation:
To get the volume just multiple 4*4*4
what's the difference between viscosity and flow rate
Answer:
Flow rate is how fast a fluid moves. The flow rate can depend on several factors. These factors are the type of fluid that you are using, the force that is pushing on a fluid, the size of the pipe the fluid flows from and the type of surface the fluid flows over. Viscosity is the resistance of a fluid to flow.
Explanation:
just looked it up
Copper oxide reacts with carbon to form copper and carbon dioxide. State what has been reduced giving a reason for your answer
Answer:
copper oxide has been reuced into copper
Explanation:
The copper has gained electrons to become stable on its own without oxygen
OILRIG- show that reducution is the gain of electrons
earth is one of the planets in the
Answer:
moon obviously
Explanation:
........
Which is the best prediction about the cell structures of muscle cells?
A.
Muscle cells have a large volume of cytoplasm so that the cell can easily change shape.
B.
Muscle cells contain a large number of mitochondria in order to provide more energy.
C.
Muscle cells do not have nuclei because they do not need to produce proteins.
D.
Muscle cells are surrounded by cell walls so that they are strong enough to move bones.
Answer:
is B
Explanation:
it isnt C or D so let's look at A and B so the answer is more likely going to be B because A your muscles cant change shape and C your muscles are protien and D humans and animals do not have cell walls that only have cell membrane
Answer:
No B. is incorrect, the REAL answer is actually C.
Explanation:
The main function of muscles is to move body parts by contracting, which requires a lot of energy. so C. is the only answer that concludes with this. The cell structure that produces energy is the mitochondrion.
Therefore, the best prediction is that muscle cells contain a large number of mitochondria in order to provide more energy.
So that means B. would be an assumable answer.
I hope this helps!
You have the compound CH4. The first element is a
(metal, nonmetal) and the second element is a
(metal, nonmetal). You would predict that this would form a(n).
(ionic, covalent) bond.
ASAP
Answer:
1. Nonmetal
2. Nonmetal
3. Covalent
Explanation:
CH4 is the chemical formula for the methane molecule in which four atoms of hydrogen is chemically bonded to one atom of carbon. Both carbon, which is the first element and hydrogen the second element are non-metals, and hence can only form a covalent bond.
A covalent bond is a type of chemical bond in which two atoms share their valence electrons. It occurs between two non metallic atoms. In this molecule, CH4, carbon and hydrogen share their valence electrons to form a covalent bond.
For each of the following ionic bonding examples, show the transfer of electrons, the ions resulting with the charges and the final chemical formula of the compund.
Ba and O,
Al and O,
Mg and P,
Na and O,
Ca and Cl
Answer:
BaO
Ba gives up two electrons and becomes Ba⁺²O takes two electron and becomes O⁻²Al₂O₃
Mg₃P₂
Na₂O
CaCl₂
Question 3 of 10
How does air pressure affect the boiling point of a liquid?
A. Air pressure lowers the temperature of the liquid molecules.
B. Air pressure keeps liquid molecules from escaping as a gas.
c. Air pressure decreases the kinetic energy of the liquid molecules.
D. Air pressure prevents diffusion from happening in a gas.
SUBMIT
Air pressure keeps liquid molecules from escaping as a gas, affect the boiling point of a liquid. Therefore, option B is correct.
Why does the boiling point decrease as air pressure decreases?A liquid's boiling point changes depending on the pressure being applied; the normal boiling point is the temperature at which the vapour pressure is equal to the average atmospheric pressure at sea level (760 mm [29.92 inches] of mercury). Water boils at sea level at 100° C (212° F).
The boiling point of a liquid is influenced by the pressure of gas above it. This is referred to as atmospheric pressure in an open system. The higher the boiling point and the more energy is needed to bring liquids to a boil, the higher the pressure.
Thus, option B is correct.
To learn more about the boiling point, follow the link;
https://brainly.com/question/2153588
#SPJ1
Given the following equation: 2C6H6 + 1502 - 12CO2 + 6H20
How many moles of O2 are needed to react with 4.0 moles of
Co HG?
a 30 moles
b 12 moles
C 4.0 moles
d 24 moles
Answer:
a) 30 moles
Explanation:
2C6H6 + 1502 -------> 12CO2 + 6H20
from reaction 2 mol 15 mol
given 4.0 mol x mol
x = 4.0*15/2 = 30. mol
how electronegativity relates to polar bonding
Consumers _____.
break down dead material into nutrients
eat only meat
eat other organisms for energy
make their own food
Answer:
Consumers are unable to make their own energy, and instead rely on the consumption and digestion of producers or other consumers, or both, to survive.
Decomposer is an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material. They are all living things that get energy by eating dead animals and plants and breaking down wastes of other animals.
Explanation:
Answer:
A
Explanation:
James has opened the valve on the propane tank for his BBQ grill. He later notices how cold the top of the tank feels. What is the reason for this?
A) The liquid inside is condensing; losing energy to overcome the interactions holding them together
B) The liquid inside is vaporizing; losing energy to overcome the interactions holding them together.
C) The liquid inside is vaporizing; gaining energy to overcome the interactions holding them together.
D) The liquid inside is freezing; gaining energy to overcome the interactions holding them together
Answer: D
Explanation:
D
Rusting of nail are chemical change or physical change and say why
Answer:
Explanation:
‘it’s a chemical change because this may seem like a decomposition reaction because it seems like the nail is decomposing and falling apart.
Answer:
the rusting of iron is a chemical change because it is two substance reacting together to make a new substance.
Explanation:
A solution of sodium hydroxide was added to a solution of sulfuric acid. How many moles of sodium hydroxide would react with 1 mole of sulfuric acid?
Answer:
Please mark Brainliest
2 moles
Explanation:
Hope it helped :)
Answer: It is 2 moles
What is a major problem with CFCs?
A-it is toxic to breathe.
B-It does not readily break down in the atmosphere.
C-It is a greenhouse gas.
D-It isn't a good refrigerant
two difference between simple cell and dry cell
Explanation:
Simple cell has liquid chemicals and it is difficult to carry from one place to another. Dry cell has no solution. So, it is easier to carry it from one place to another and there is no risk of spilling acid from the dry cell.
There are
groups and
periods in the periodic table.
Answer:
I do not understand but,
Explanation:
There are 18 groups, 18 columns, and 118 elements at the time of this response.
Here is a map of the periodic table for any more help that you might need.
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How many grams of C are there in 0.234 moles of caffeine?
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What is the charge on an electron?
-1
0
+1
+2
Answer:
he charge on an electron is -1. Explanation : Electron is a subatomic particle whose symbol is . The electrical charge on an electron is negative. The electron was discovered by the J.J. Thomson. The mass of an electron is . The charge on electron and proton is equal but opposite. Neutron has zero charge and proton has +1 charge.
Explanation:
