Answer:
Velocity = Distance Covered÷Time Taken
Velocity = 4000÷8
V = 500
Can anyone help me with this? It's chemistry
Answer:
ohh... it's time vs air that's all
What procedures can be performed on trials 2 and 3 so that the rate of dissolving is the same as trial 1?
Answer:
increase the temperature
Explanation:
if you increase the temperature, the dissolving rate time will decrease.
The procedures that can be performed on trials 2 and 3 so that the rate of dissolving is the same as trial 1 is by increasing the temperature. Therefore, the correct option is option D.
What is rate of dissolution?A solute dissolves together into solvent during the process of dissolution, creating a solution. We are aware that the collisions between the molecules of the solvent and the particles inside the solid crystal are what cause a solid to dissolve in water.
The pace of dissolution will rise if anything is done to make such collisions happen more frequently or with more energy. Consider attempting to dissolve little sugar in a cup of tea. A cube of sugar would dissolve more slowly than a packet of powdered sugar. Stirring or stirring the solution would speed up the rate of dissolution. The procedures that can be performed on trials 2 and 3 so that the rate of dissolving is the same as trial 1 is by increasing the temperature.
Therefore, the correct option is option D.
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A scientist wants to investigate the effect of concentration of nutrient agar to the growth of bacteria. He created 3 set ups: A) 30 g nutrient agar powder in 1 L H2O B) 40 g nutrient agar power in 1L H2O C) 50 g nutrient agar powder in 1 L H2O
1) Based from the given scenario, CREATE a testable hypothesis using IF-THEN- BECAUSE statements.
2) Using your hypothesis, IDENTIFY the dependent and the independent variables.
A bottle of an unknown liquid has a volume of 6.3 mL and mass 255.15 g. What is its density? *
Answer:
40.5 g/mL
Explanation:
Density is a measure of a substance's mass over its volume.
d = m/v
Therefore d = 255.15g/6.3mL = 40.5 g/mL
please help me with n5 ty
and don’t waste my time if you don’t know the answer please
Thanks:)
Which characteristics of flower petals help an angiosperm reproduce? (Select all that apply.)
Answer:
attractive smell and bright colours
how to find molar mass
Answer:
Multiply the element's atomic mass by the number of atoms of that element in the compound. This will give you the relative amount that each element contributes to the compound. For hydrogen chloride, HCl, the molar mass of each element is 1.007 grams per mole for hydrogen and 35.453 grams per mole for chlorine.
Which one do I pick?
Answer:
i would go for the 2nd as far as i know they were a big continent and an earthquake separes them all
someone please help with this
Answer:
a. triple bond
b.diatomic atom
c. covalent bond
d. non polar covalent bond
e. covalent bond
f. sigma bonds
lots o points and brainliest To find the atomic mass of an element that is included on a periodic table, what must be found first?
The number of protons in that element.
The average mass of all the isotopes.
The number of electrons in that element.
The number of neutrons in that element.
Answer:
The average mass of all the isotopes.
Option B.
Explanation:
Have a great rest of your day.
A halloon has a volume of 456 mL at a pressure of 1.0 atm. It is taken under water in
a submarine t a depth where the air pressure in the submarine is 3.3 atm. What is the
volume of the balloon? assume con- stant temperature.
According to Boyle's law, temperature being constant the volume of the balloon at pressure 3.3 atmospheres is 138.18 ml.
What is Boyle's law?Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.
Mathematically, it can be stated as,
P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.
According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,
P₁V₁=P₂V₂
Substitution in above equation gives, V₂=1×456/3.3=138.18 ml.
Thus, the volume of balloon is 138.18 ml.
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Please help with chemistry
Answer:
Proton
Explanation:
It has a positive charge
Answer:
electron
Explanation:
Which does not show earths past environment?
Please hurry I need this :((
Why is burning fossil fuels a problem?
Answer:
it's harmful
Explanation:
it's harmful to our environment it can endanger our planet and endangered animal species it can also kill lots of plants and we have a hard time burning fossil fuels with limited factories which costs a lot of money.
What does water offer that attracts human settlement?
Answer:
Water is a human necessity. Therefore, it is one of the first things a human settlement would need to have. A community cannot thrive without a water source.
Answer:
Water is a basic need that is more than a necessity, humans can't survive without water for more than a period of three days, And thus having water as available, creates a tendency among humans as humans like to get everything at ease so they tend to settle near the water bodies if possible.
PLEASE HELP ASAP!!!! WILL GIVE BRAINLIEST TO CORRECT ANSWER!!
The characteristics of a certain gas are shown below.
Characteristics of a Gas
Characteristic Description
Compound Oxygen gas
Condition STP
Mass 4.8 grams
What is the expected density of the above sample of gas?
A. 1.90 g/L
B. 1.82 g/L
C. 1.56 g/L
D. 1.43 g/L
Answer:
1.56g/L it will be as per my calculation if I am not wrong so
Answer: D: 1.43
The expected density of the given sample of oxygen gas at STP can be calculated using the ideal gas law equation:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
At STP, the pressure is 1 atm and the temperature is 273 K. We are given that the mass of the oxygen gas is 4.8 g. To find the number of moles of oxygen gas, we can use its molar mass, which is 32.00 g/mol:
n = mass / molar mass = 4.8 g / 32.00 g/mol = 0.15 mol
Using the molar volume of an ideal gas at STP, which is 22.4 L/mol, we can find the volume of the oxygen gas:
V = n × molar volume = 0.15 mol × 22.4 L/mol = 3.36 L
Therefore, the expected density of the given sample of oxygen gas at STP is:
density = mass / volume = 4.8 g / 3.36 L = 1.43 g/L
Therefore, the expected density of the given sample of oxygen gas at STP is 1.43 g/L.
Which statement BEST describes what happens during solvation?
Answer:
A
Explanation:
The statement best describes solvation " KCl is surrounded by the polar water molecule to form an electrolyte solution which can conduct electricity."
What is solvation?The act of attracting and associating particles of a solvent mostly with molecules as well as ions of a solute would be known as solvation.
What is electrolyte?A material that contains ions and has been electrically conducting due to the mobility of the ions but still doesn't conduct electrons was called an electrolyte.
Whenever the solvent would be in the water, the process is referred to as hydration. The process of solvation shows the combination of solvent and solute molecules. A solute molecule is usually surrounded with solvent molecules that are organized in a special manner during solvation.
Therefore, the correct answer will be an option (A)
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For the balanced equation shown below, if the reaction of 34.6 grams of C2H4F2 produces 6.90 grams of H2O, what is the percent yield?
2C2H4F2 + 3O2 → 4CO + 2H2O + 4HF
lima ribu juta miliar triliun ......
A flask contains a mixture of hydrogen gas and water vapor at STP. If the pressure of the water vapor is 19.5 mmHg, then what is the pressure of the hydrogen gas?
779 mmHg
779 mmHg
760 mmHg
760 mmHg
81.7 mmHg
81.7 mmHg
741 mmHg
Answer:
I would say A but not sure
Explanation:
halp balance plez (⊙◡⊙)
Answer: SnO2 + 2 H2 = Sn + 2 H2O
Explanation: I used a balance equation website. It's called WebQC if you want to check it out for future help.
1. Complete the following: (a) Covalent bonds are one type of ___________ forces that are formed when two atoms ______ electron(s) (b) Covalent compounds consists of two __________ atoms (c) Single covalent bond: are formed when two atoms share _______ pair of electrons. (d) Double covalent bond: are formed when two atoms share _________ pairs of electrons. (e) Triple covalent bond: are formed when two atoms share ________ pairs of electrons. (f) A molecule is a neutral groups of atoms that are held together by _______ bonds (g) Diatomic molecule consists of ________ atoms. (h) Molecular compound is made of _________ bonded atoms
Answer:
a) Van der Waals intermolecular forces
b) bonded
c) one pair
d) two pairs
e) three pairs
f) chemical bonds
g) two atoms
h) two or more covalently bonded atoms
Explanation:
(a) Covalent bonds are one type of Van der Waals intermolecular forces that are formed when two atoms share electron(s)
(b) Covalent compounds consists of two bonded atoms
(c) Single covalent bond: are formed when two atoms share one pair of electrons.
(d) Double covalent bond: are formed when two atoms share two pairs of electrons.
(e) Triple covalent bond: are formed when two atoms share three pairs of electrons.
(f) A molecule is a neutral groups of atoms that are held together by chemical bonds.
(g) Diatomic molecule consists of two atoms.
(h) Molecular compound is made of two or more covalently bonded atoms.
What is a compound
A.) smog
B.) sea water
C.) air
D.) magnesium
E.)salt
Edmentum answer
Answer:
B
Explanation:
because sea water taste like Salt
The melting point of a substance is the same as its _____ point.
evaporation
freezing
boiling
sublimation
An object with a mass of 2.0 kg had a force of 4.9 newtons applied to it.What is the resulting acceleration of the object?
This is from my Science Class !And I haven’t seen this question anywhere !
Answer:
2.45 m/s2
Explanation:
Newton's 2nd law tells us that force is equal to the mass of an object multiplied by its acceleration, or F = ma. We can solve this equation for acceleration by rearranging algebraically:
a = F/m
So:
a = (4.9N)/(2.0kg) = 2.45 m/s2
What is the percent composition of Iron in
Fez(Cr207)3
Answer:
Explanation:
The percentage composition of iron (Fe) in Fe2(Cr207)3 can be calculated by finding the molar mass of Fe and the compound
An object accelerates 5.0 m/s2 when a force of 12.0 newtons applied to it.What is the mass of the object?
Please help, I haven’t seen this question anywhere !
Also this is from my Science Class
Answer:
2.4kg
Explanation:
Newton's 2nd law tells us that force is equal to the mass of an object multiplied by its acceleration, or F = ma. We can solve this equation for mass by rearranging algebraically:
m = F/a
So:
m = (12.0N)/(5.0m/s2) = 2.4kg
How many liters of carbon monoxide at STP are needed to react with 4.80 g of oxygen gas to produce carbon dioxide
2CO(g)+O2(g)=2CO2(g)
Answer:
i dont know...
Explanation:
What is the name of the compound H₃S₅?
The general format AB+CD→AD+BC represents a ____________ reaction.
A. exchange
B. replacement
C. decomposition
D. synthesis
Answer:
D aka synthesis
Explanation:
Got question and got it right :) have a good rest of your day
Which area is MOST likely to support a marsh ecosystem? a sunny, open area with lots of sand dunes a shallow, sheltered area near an estuary a rocky, coastal area with very high tides deep ocean water miles from a river's mouth
Answer:
coastal area with very high tides deep ocean water miles from a river's mouth
Explanation:
Marshes are a type of wetland ecosystem where water covers the ground for long periods of time. Marshes are dominated by herbaceous plants, such as grasses, reeds, and sedges(National Geographic Society).
Animals found in a marsh include; frogs, toads, turtles, snakes, mammals, birds and insects. A marsh is a wetland that is dominated by herbaceous rather than woody plant species(Wikipedia). It is characterized by very high tides deep ocean water miles from a river's mouth.
Answer:
a shallow, sheltered area near an estuary
Explanation: