Chemistry High School
Answers
Answer 1
answer: 454
explanation: divide 22,700 and 50
Related Questions
How is pesudoscience different than science
Answers
The big difference betweenscienceandpseudo-scienceis a difference in attitude. While apseudo-scienceis set uptolook for evidence that supports its claims, ascienceis set uptochallenge its claims and look for evidence that might prove it false
Density
Make a prediction and test each object to determine if it will sink or float in water.
Answers
Answer:
The golf ball will sink
The plastic Turtle will float
The seashell will sink
The pencil will float.
Explanation:
What is the average speed of a bicyclist if they cover 60 miles within 5 hours?
Answers
Answer:
12 miles per hour. your welcome
When a mixture of water, sand, and salt is filtered, what passes through the filter paper?
Answers
Answer:
Water
Explanation:
Think of it this way, when coffee is made, the liquid passes through, not the coffee grounds. so in this case, the water passes through, and not the sand or salt.
When you dissolve a mixture of salt and sand in water, the salt dissolves but the sand remains. When this new mixture is filtered, the salt in the salty water solution passes through the filter paper to form the filtrate, leaving the sand as the residue.
What is the process of filtration ?
Filtration is the process of removing solid particles from a liquid or gaseous fluid by using a filter medium that allows the fluid to pass through but retains the solid particles. The desired product could be either the clarified fluid or the solid particles removed from the fluid.
The salt and sand mixture can be separated using filtration followed by evaporation. Filtration can separate sand from a sand-salt solution mixture (salt dissolved in water). After filtering, sand remains as a residue on the filter paper.
The filtrate is the liquid that passes through the filter paper. The residue is the solid particles collected on the filter paper.
Thus, When a mixture of water, sand, and salt is filtered, water passes through the filter paper.
To learn more about the filtration, follow the link;
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Most transition metals can exist in more than one oxidation state, and as such, can form oxides with different formulas. If a basic solution containing 1.89 g of dissolved copper(II)chloride dihydrate (molar mass = 170.48 g/mol) is reacted with excess hydrazine, N2H4, a red form of copper oxide is created. If that solid is isolated, it has a mass of 0.79 g after drying.
What is the formula of this copper oxide?
Did the oxidation state of copper change during this reaction?
Answers
Answer:
- The formula of the formed copper oxide is Cu₂O
- The oxidation state of copper does change from (II) to (I), because copper is reduced.
Explanation:
Hydrazine (N₂H₄) is a well known reducing agent, so it reduces copper(II)chloride (CuCl₂). The oxidation state of Cu in CuCl₂ is +2:
CuCl₂ → Cu²⁺ + 2 Cl⁻
Thus, when Cu²⁺ is reduced to an oxide, it is formed copper(I) oxide (Cu₂O), which is a red solid. According to this, we can conclude:
- The formula of the formed copper oxide is Cu₂O.
- The oxidation state of copper does change from (II) to (I), because copper is reduced.
Does a balanced force only occur on an object that is not moving?
a. true
b. false
Answers
Answer:
b false
Explanation:
A ball has a mass of 33.6 grams and a volume of 14.0 cubic centimeters (cc). What is its density?
Answers
Answer: 2400kg/m3
Explanation: p=m/3 m over 3
33.6g/14cm3
2.4g/cm3
2400kg/m3
1:Expenditure is the money the goverment spends true or false if false explain why HELP FAST AND WILL GIVE YOU BRAINEST O_O
2.Revenue is he money he goverment collects/makes. true or false if false explin why
if someone answers boh i will make he brainlyest thing on here (also there are more points because there are two quesions
Answers
Answer:
1. True
2. True
Explanation:
Government expenditure includes all government consumption, investment, and transfer payments
Government revenue is money received by a government from taxes and non-tax sources to enable it to undertake government expenditures
Which isotope has the greatest number of protons?
Answers
the answer is Pa-238
Question: How does the surrounding temperature affect the rate at which ice melts
Answers
Answer:
Temperature will affect the rate at which the ice will melt, with the greater the temperature difference between the ice and its surroundings causing a faster rate of melting.
Explanation:
PLEASE HELL ME!!!!
Find the density of a cylinder on Earth that weighs 14 kg, a height of 25 cm, and a diameter of 4 cm.
Answers
Answer:
The answer is 0.045 kg/cm³
Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of cylinder = 14 kg
Volume of a cylinder = πr²h
where
r is the radius
h is the height
[tex]radius = \frac{diameter}{2} \\ [/tex]
From the question
h = 25 cm
[tex]r = \frac{4}{2} = 2 \: \: \: cm[/tex]
The volume of the cylinder is
[tex]V = {2}^{2} (25)\pi \\ = 4 \times 25\pi \\ = 100\pi \\ = 314.159265...[/tex]
We have
volume = 314.159 cm³
The density of the cylinder is
[tex]density = \frac{14}{314.159} \\ = 0.044563421...[/tex]
We have the final answer as
0.045 kg/cm³
Hope this helps you
Answer:
The answer is 0.045 kg/cm³
Explanation:
The density of a substance can be found by using the formula
From the question
mass of cylinder = 14 kg
Volume of a cylinder = πr²h
where
r is the radius
h is the height
From the question
h = 25 cm
The volume of the cylinder is
We have
volume = 314.159 cm³
The density of the cylinder is
We have the final answer as
0.045 kg/cm³
_______ is a property of matter?
Answers
Answer:
DENSITY!!! mark as brainliest
Explanation:
Mickey notices that his dog Pluto is suffering from fleas which causes his hair to fall out. His friend Goofy tells him that rubbing cabbage on his hair is the perfect cure. Mickey decides to test this cure by rubbing Pluto with cabbage for one week. After a week of treatment, the fleas are gone and Pluto’s hair looks healthy and feels a lot better. what is conclusion
Answers
Answer:
rubbing dogs with cabbage will get rid of fleas.
Explanation:
PLEASEEE HELPP ! WILL MARK BRAINLIEST !
Why do you think oil and water produce different cooking results? *HINT: Think about the nature of the molecules in the oil and water and how this affects the way they are used for cooking.
Answers
Answer:
The temperature of the cooking liquid. Oil will generally be a lot hotter and will cook faster, resulting in different texture. Well it's because the highest temperature possible in cooking in water is 100 C. With cooking in oil temperature can reach to as high as 230 - 240 C.
HOPE IT HELPS!!!!!
what type of chemical reaction is
10.Pb + FeSO, → PbSO, + far
Answers
Answer: To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above. Use uppercase for the first character in the element and lowercase for the second character.
Explanation:
What is a safety decision
Answers
Answer:
One example of a safety decision would be wearing a mask, goggles, apron, or gloves. Or wearing a helmet when biking.
Explanation:
plz, help me Lisa’s doctor tells her that she needs to eat more foods that contain calcium to maintain her bone health. What could happen if Lisa doesn’t follow her doctor’s orders?
Answers
Answer:
Deficiency of calcium which means that her body will take calcium from her bones which results in weakening of bones. (osteoporosis)
Explanation:
Why don't protons stick together?
Answers
Answer:
The protons must feel a repulsive force from the other neighboring protons. This is where the strong nuclear force comes in. ... If they can't get that close, the strong force is too weak to make them stick together, and other competing forces (usually the electromagnetic force) can influence the particles to move apart.
Explanation:
They must feel a repulsive force If they can't get that close, the strong force is too weak to make them stick together
Hillary is dropping objects that are the same volume. She wants to investigate how an object's mass affects the average speed at which it travels when dropped, until it hits the ground. Which variable must Hillary change during the experiment?
Answers
Answer:
the mass of the object
Explanation: i dont really no
even cold air radiates what?
Answers
Answer:
Cold air also radiates Heat.
Heat transfer is awesome!!
Even cold air radiates electromagnetic waves, specifically in the form of thermal radiation.
Thermal radiation is the emission of electromagnetic waves by any object that has a temperature above absolute zero. All objects, including cold air, possess thermal energy due to the motion of their molecules.
According to the laws of thermodynamics, objects at any temperature above absolute zero emit thermal radiation.
The intensity and frequency distribution of the radiation depends on the object's temperature and its emissivity, which is a measure of how efficiently it emits radiation.
To learn more about electromagnetic waves, follow the link:
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The pressure inside a sealed container of methane gas (CH) is 35.0 kPa. If this 80.0 L sample of
methane is increased to a pressure of 92.0 kPa, what is the new volume?
Show work pls
Answers
Answer:
The answer is 30.43 L
Explanation:
In order to find the new volume we use the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question
P1 = 35 kPa = 35000 Pa
V1 = 80 L
P2 = 92 kPa = 92000 Pa
So we have
[tex]V_2 = \frac{35000 \times 80}{92000} = \frac{2800000}{92000} \\ = 30.43478260...[/tex]
We have the final answer as
30.43 L
Hope this helps you
How does an atom change if all of its electrons are removed?
The atom’s volume increases.
The atom’s mass increases.
The atom becomes positively charged.
The atom becomes negatively charged.
Answers
Answer:
The atom becomes positively charged.
Answer:
the answer is c) The atom becomes positively charged.
Explanation: hope this helps also i just took the test <3
*I WILL GIVE BRAINLIEST IF ANSWER FAST*Which of the following correctly describes the type of energy conversions taking place
when thinking about the food we eat?
Select one:
a. We digest food to access the chemical energy of food and convert it to kinetic
and thermal energy
ob. We digest food to access the chemical energy of food and convert it to
electrical and radiant energy.
c. We digest food to access the kinetic energy of food and convert it to thermal
and kinetic energy.
d. We digest food to access the thermal energy and convert it to chemical and
thermal energy
Answers
Answer:
B
Explanation:
Answer:
a
Explanation:
This is the answer that I got,
What happens to the pointer on the triple beam balance
Answers
Answer:
Riders - The riders are the sliding pointers placed on top of the balance beams to indicate the mass in grams on the pan and beam. Zero adjustment knob - This is used to manually adjust the triple beam balance to the 'zero' mark (check to ensure that the pointer is at zero before use).
Explanation:
Hope this helps yah:)
Which of the following situations is unique to hurricanes and not tornadoes?
form over land
form over warm waters
destroy buildings
form circular wind patterns
It’s science
Answers
Answer:
i think b.
Explanation:
The earth is closest from the sun in___
Answers
Answer:
january
Explanation:
it is in january
Earth is closest from the sun in January.
The density of a substance is the ratio of its mass to its volume. The formula for density is: D = mass/volume. If the density and the volume of a liquid are known, its mass can be found by
a .adding its density to its volume
b .dividing its density by its volume
c. multiplying its volume and density
d. subtracting density from its volume
Answers
Answer:
I think it's B.
Explanation:
How much does 1 gallon of water weigh in lbs?
Given: Density of water = 1 g/cm^3
Answers
Answer:
8.35 US lbs.
You don't need to know density for this problem... although it is another way to get the same solution.
During an investigation, similar glow sticks were placed in two beakers containing water at different temperatures. A record of the investigation is shown below: Investigation Record
Glow Stick Beaker Water Temperature Duration of glowstick in the beaker
A 50 °F 2 minutes
B 140 °F 2 minutes
When the glow sticks were bent, chemicals inside reacted to produce a glow. Which statement is most likely correct?
A. Stick A glows brighter as the rate of reaction inside it is higher.
B. Stick A glows brighter as the rate of reaction inside it is lower.
C. Stick B glows brighter as the molecules inside it move faster.
D. Stick B glows brighter as the molecules inside it move slower.
Answers
Answer:
b
Explanation:
Answer: b
Stick a glows brighter as the rate of reaction inside it is lower
How are anions formed and what are their charges?
Group of answer choices
Atoms gain electrons and become positive
Atoms lose electrons and become positive
Atoms lose electrons and become negtive
Atoms gain electrons and become negative
Answers
Answer:
Ions are formed when atoms gain or lose electrons
Explanation:
