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Related Questions
Explain why it is important that there be no gaps around the edges of the filter paper
during a vacuum filtration.
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Vacuum filtration is a separation technique that is used to separate a solid product from a liquid. The method involves pouring the mixture of the solid and the liquid through a filter paper that is inserted inside a funnel. The filter paper trap the solid while the liquid is drawn through the funnel into the flask by a vacuum. It is very important to ensure that there is no gap around the edges of filter paper that is inserted into the funnel so that the mixture will not escape the filter paper and be poured directly into the flask below, thus messing up the separation process.
What is the ratio by mass of oxygen to carbon when 32 g of oxygen combine with 12 g of carbon?
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1:2
32gO(1molO/16gO)=2molO
12gC(1molC/12gC)=1molC
A scientific has a lot of support and is more than just a hunch
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Which of the following correctly describes the formula for speed?
Speed equals direction plus time
Speed equals distance plus direction
Speed equals distance over time
Speed equals mass over time
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Answer:
Speed equals distance over time.
Explanation:
Speed of an object is equal to the total distance covered divided by total time taken. The mathematical formula for speed of an object is given by :
[tex]v=\dfrac{d}{t}[/tex]
d = distance covered
t = time taken
Speed of an object is a scalar quantity. Its SI unit is m/s or meters per second. So, the correct option is (c) "Speed equals distance over time".
water is most dense at 4 degrees celsius. since at this temperature 1 ml of water has a mass of 1g its density is what
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what is the function of a hypothesis in the scientific inquiry process?
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Please vote my answer brainliest. thanks!
A double replacement reaction can be best described as a reaction in which
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Answer:
Explanation:
A double repalcement reaction is a type of reaction in which there is exchange of ions between two compounds leading to the formation of new products. It is also known as double displacement reaction.
BC+DE produces BE+CD.
A double replacement reaction leads to the formation of two new compounds Be and CD.
Which activity would be an appropriate first step when designing an experiment?
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Here's what you do next:
2. Research.
3. Make a hypothesis.
4. Experiment while controlling variables.
5. Analyze data and make a conclusion.
6. Communicate your findings.
(If the experiment doesn't work, try, try again!)
which element of art would this tool help an artist to understand?
A. line
B. shape
C. color
D. space
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Tools help artists understand different elements of art. A pencil or liner can aid understanding of 'line', drawing tools help understand 'shape'. Coloring tools like paint and brushes assist with the 'color' element, and any drawing or painting tool can aid understanding of 'space'.
Explanation:Without specifying the tool, it's difficult to say definitively which element of art it would help an artist understand. However, broadly speaking, different tools help to understand different elements. For instance:
A pencil or a liner can help an artist understand the 'line' element. This includes understanding the thickness, length, curvature and directions of lines. The 'shape' element can be understood using tools like drawing pencils and templates, which can help create and understand different shapes. To understand the 'color' element, an artist might use a painting palette and brushes, watercolors, acrylics, or other coloring tools. Understanding the element of 'space' often involves a conceptual understanding of positive and negative space in art, distance, and depth, which can be practiced with any drawing or painting tool. Learn more about Tools in Art here:https://brainly.com/question/1980413
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A rock has a volume of 50 mL and a mass of 200 g. What is the density??? please help
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200g divided by 50 mL will equal the density
the particles in a solid do not move is it true or false?
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A certain ore is 26.9% nickel by mass. How many kilograms of this ore would you need to dig up to have 50.0 g of nickel?
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To extract 50.0 g of nickel from an ore that is 26.9% nickel by mass, you would need approximately 0.1859 kilograms of the ore.
To calculate the amount of ore needed to obtain 50.0 g of nickel, we use the percentage of nickel in the ore and set up a simple proportion.
Firstly, we know that the ore is 26.9% nickel by mass. This means that for every 100 g of ore, there are 26.9 g of nickel.
To get 50.0 g of nickel, we can set up the equation (26.9/100) × mass of ore = 50.0 g.
By rearranging the equation for the mass of the ore, we get the mass of the ore = (50.0 g) / (26.9/100).
Calculating the mass of the ore, we find it to be approximately 185.9 g, which we can then convert to kilograms.
To convert grams to kilograms, we divide by 1000. So, 185.9 g is equivalent to 0.1859 kg.
Therefore, to obtain 50.0 g of nickel, approximately 0.1859 kilograms of ore is required.
The structure of a comet is considered to be like a large, ____, or a mass of frozen ice and rock. a. solid planet c. cratered moon b. dirty snowball
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Please select the word from the list that best fits the definition. ______ occurs when particles in a gas lose enough energy to form a liquid.
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can someone help, please ??
Chemistry
3. In a nuclear reaction, energy is released by the combination of two elements into a new element. This
process is an example of
A. artificial disintegration.
B. nuclear fission.
C. natural radioactivity.
D. nuclear fusion.
4. Which of the following is one way to prevent the corrosion of iron?
A. Protect the iron from polluted air.
B. Let the iron develop a natural coat of carbonate.
C. Paint exposed iron parts with protective paint.
D. Add carbon to the iron
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Painting the iron would block iron to react
Separating the base metal from the environment will prevent the metal from oxidizing. Chromium dioxide on the surface of the steel acts like paint and separates the base metal from the surrounding environment.
Solution C: Paint exposed iron parts with protective paint is one way to prevent the corrosion of iron?
Identify a chemical reagent that can be used to distinguish solid CaCl2 from CaCO3
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how many micrograms are in 2.45x10^3 grams?
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First put the equation down
2.45×10^3
Next its a positive so you will be going to the right:
2450.
Your answer is...
=2450. grams
Explain how heat would change the density of a parcel of air
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Less dense means less packed. Heat increase the kinetic energy
As the air is heated the kinetic energy of particles increases rendering it less dense.
How is kinetic energy related to temperature?Kinetic energy is a type of energy possessed by the particles when they are in motion.Heating causes temperature to rise and as a result of which kinetic energy increases.Temperature and density are inversely proportional while temperature and kinetic energy are directly proportional.
As the temperature increases, kinetic energy increases and density decreases.Considering all these factors , air when heated up it's density decreases as the particles will move faster with increase in temperature, as heat is inversely proportional to density.
This type of phenomenon can be observed in deserts where the air is hot due to an increase in temperature.
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Honestly reporting experimental findings is an example of using good
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A person's heartbeat is 61 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does the person live? Disregard leap years.
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The approximate lifespan of the person is 96.79 years based on a heartbeat of 61 beats per minute and 3.1e9 total heartbeats in a lifetime.
Explanation:To calculate the number of years a person lives based on their heartbeat, we can divide the total number of heartbeats in a lifetime by the number of heartbeats per minute. First, let's convert 3.1e9 to standard notation: 3,100,000,000. Then, we divide this number by 61 to find the number of minutes it takes for the person's heart to beat 3.1e9 times. Dividing 3,100,000,000 by 61 gives us approximately 50,819,672.13 minutes. We can then divide this number by the number of minutes in a year (525,600) to find the approximate number of years the person lives. 50,819,672.13 minutes divided by 525,600 gives us approximately 96.79 years.
Jill said that when you are standing in front of a fire you are warm because you release the coolness of your body to the heat of the fire.
Greg said that when you are standing in front of a freezer with the door open you feel cool because you are releasing your heat into the freezer.
Who has made the accurate statement regarding heat transfer?
Jill is correct.
Greg is correct.
Both Jill and Greg are correct.
Neither Jill nor Greg are correct.
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What is the oxidation of carbon as an element(C)?
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It can be either
Which of the following could be absent from the grief process
A. Bargaining
B. Death
C. Acceptance
D. Depression
Teens with low self esteem are more likely to use drugs, drop out of school,and suffer from eating disorders
A. True
B. False
During the teen year, our self esteem usually
A. Stays the same
B. Increases
C. Decreases
D. Increases then decreases rapidly
Which of the following is not on the hierarchy of needs?
A. Physical needs
B. Belonging
C. Security
D. Entertainment
Happiness, sadness, and fear are examples of ____ emotions
A.learned
B.primary
C. Secondary
D. Innate
Which defense mechanism is john using when he says "it's ok if I tell my parents that I am going to Lisa's house even when I am really going to ride around with because they won't mind."
A. Regression
B. Rationalization
C. Rejection
D. Denial
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Answer: B. A. D. D. B. B
Some kids do drop out and do drugs.
From the given occasions, acceptance of anything does not involve grief. The statement regarding teens is true. During teen year, self esteem may increase or decrease. Happiness and sadness and fear are primary emotions.
What is emotion?Emotion is a person's feelings expressed in a situation. It may happiness, sad, fear, angry etc. The emotion of a person depends upon the occasion and metal health of the person.
Among the given situations a in which greif is absent is acceptance. Thus option C is correct. Teens with low esteem have a chance to addict drugs. Hence, the statement is true.
During teens year, self esteem changes rapidly. Thus option D is correct. A need which is not the hierarchy is belonging. The primary emotions include happiness, sad and fear whereas, angry, excitement etc are secondary emotions.
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Which is a TRUE statement about the subatomic particles that make up all neutral atoms?
A. The number of neutrons and the number of protons are the same.
B. The number of protons and the number of electrons are the same.
C. The number of electrons and the number of neutrons are the same.
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:)
Answer: The correct answer is Option B.
Explanation:
There are 3 subatomic particles present in an atom. They are: protons, electrons and neutrons.
Protons: They carry positive charger and are found in nucleus.Electrons: They carry negative charge and are found around the nucleus.Neutrons: They dos not carry any charge and are found in nucleus.Any neutral atom has equal number of protons and electrons.
Hence, the correct answer is Option B.
Which one of these statements does not refer to radiation
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warm air rises and takes heat with it
What happens to the total mass of a substance undergoing a physical change
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Mass through chemical change stays the same as well. Example: burning paper, the ash left behind is not all of the mass of the reactants, Carbon dioxide, and other substances also makeupmass but just is not seen
If your answer choices are:
It stays the same.
It doubles.
It triples.
It is reduced.
The correct answer is "It stays the same."
In writing an element's symbol the first letter is always ________________ and the second letter is ____________________. A) capitalized, capitalized B) not capitalized, capitalized C) capitalized, not capitalized D) not capitalized, not capitalized
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A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 4.2 cm . Its mass is 1.1 kg . Calculate the density of the metal.
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Which is an example of a plasma that occurs in nature
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Plasma is the most energetic state of matter and primarily consists of ionized gases. Natural examples of plasma include stars like the Sun and phenomena like lightning, which ionize gases due to their high temperature and energy.
Explanation:The question asks for an example of a plasma that occurs in nature. Plasma is the most energetic state of matter and is characterized by ionized gases made up of negatively charged free electrons and positively charged ions. In nature, stars such as the Sun are perfect examples of this. Stars, including the Sun, are so hot that the material they are composed of exists in the form of an ionized gas, or plasma. All particles in this state are rapidly in motion, continuously colliding with each other, leading to the pressure of the gas.
Not only stars, but certain weather phenomena such as lightning also contain plasma. The lightning's heat ionizes the gases in the atmosphere, leading to a plasma state. Therefore, the Sun and lightning are examples of plasma occurring naturally in the universe.
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Which outcome occurs when bonds between atoms are broken or formed?
A.
a physical change
B.
an element increasing in size
C.
a chemical change
D.
a change of state
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So, when bonds between atoms are broken or formed, they undergo a chemical change.