Problem #1
Observation: I am sitting in my bedroom working on the computer at night. Suddenly the lights and computer go off
leaving me in darkness. My iPod is still going though.
Inference:
What is the inference
which describes an atom with an atomic number of nine
Answer:
Fluorine
Explanation:
fluorine is the element in question, as its atomic number is 9
24. A hypothesis cannot be considered a
a. possible explanation,
b. preliminary conclusion.
c. good guess.
d. concept
Answer:
B. Preliminary conclusion
Explanation:
The answer is B because a hypothesis is really an educated guess you make in regards to a question, usually before performing an experiment, so it can't be a preliminary conclusion because you don't really have any solid evidence to support your hypothesis, you only have background information. You will either be able/not be able to support your hypothesis after your expirement has concluded.
If an atom has 3 protons in its nucleus, how many electrons must it have
Answer:
3
Explanation:
REMEMBER :Protons and electrons are always the same.
Hope this is correct and helpful
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Is pure Iron a pure substance or mixture
Answer:
Pure iron is a pure substance.
Explanation:
Pure iron is a pure substance because it's chemical composition stays uniform regardless of it's sample size. It's matter that appears uniform in appearance and composition, no matter how small the sample size. An example of a pure substance includes pure iron
Which element has similar chemical properties compared to Carbon (C)?
Answer:
silicon (S)
Explanation:
A 5.32 g mixture contains both lithium fluoride, LiF, and potassium fluoride, KF. If the mixture contains 3.12 g fluorine, what is the mass of the KF in the mixture?
Answer:
Explanation:
entire mixture = 5.32g
F = 3.12g --> 3.12g*(1mol/18.998g) = 0.1642mols F
Since LiF has 1mol Li to 1 mol F,
0.1642mols F* (1mol Li/1 mol F) = 0.1642mols Li
Convert into grams:
0.1642mols Li * (6.94g/1mol) =1.1397g Li
So add the masses of Li and F together:
3.12g F + 1.1397g Li = 4.2597g LiF
5.32g - 4.2597g LiF = 1.06g KF
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Basically what we did is convert the given mass of F to mols and since we know that there is a 1:1 mole ratio of F to L, the number of mols of F is the number of mols of Li. Change the mols of Li to grams and then add the mass of Li with given mass of F. You now have the mass of LiF. To find mass of KF, subtract mass of LiF from mass of entire mixture.
An electron has a mass
A solid block with a length of 6.0 cm, a width of 3.0 cm, and a height of 3.0 cm has a mass of 146 g. What is the block’s density? Show all work.
product testing claims are called?
Explanation:
They are called consumer testing or comparative testing, is a process of measuring the properties or performance of products. ... Product testing might be accomplished by a manufacturer, an independent laboratory, a government agency, etc. Often an existing formal test method is used as a basis for testing
hope this helps
Answer:
Product testing claims are called Consumer Testing .
whats Orbital Notation for sodium
Answer:
The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the remaining electron in the 3s. Therefore the sodium electron configuration will be 1s22s22p63s1.
Explanation:
Say the Tuna is removed from the ocean food web, how would it affect other organisms in the food web?
Answer:
removing a top predator may cause its prey to become more abundant, as fewer individuals are eaten. But with more prey around, the organisms that it eats may become scarcer. Seemingly simple changes can have complex effects, with direct and indirect interactions rippling throughout entire ecosystems.
Explanation:
Can someone pls help me I appreciate it
Answer:
b, e, f
Explanation:
4. What are some reasonable safety precautions for field investigations? (1 poi
O None; there are no hazards in the field.
O Always wear goggles and aprons.
O Be prepared and use common sense.
O Always go into the field alone.
The correct answer is Be prepared and use common sense
Explanation:
Field investigations involve studying a phenomenon in a natural environment or setting. For example, the habits of spiders can be studied through field investigation by observing the behavior of spiders in their habitat. This is the opposite of laboratory investigations.
Moreover, as any other investigation, safety precautions are needed to avoid any hazard, and because field investigations can occur in any natural setting and can be related to different hazards, the key rule is to be prepared to work in a specific environment, for example, if the setting is the ocean special suits are required to get in the water and most importantly use common sense about safety.
A freighter ship carrying a cargo of uranium hexafluoride sank in the English Channel in late August 1984. The cargo of uranium hexafluoride weighed 7.51 x 104 kg and contained 1.47 x 106 L of UF6. What is the density, in g/mL, of uranium hexafluoride?
Your
a) 0.0511 g/mL
b)1.53 g/mL
c)5.11 g/mL
d)2.25 g/mL
e)0.196 g/mL
Answer: A.) 0.0511 g/mL
Explanation:
Given the following :
Mass of uranium hexafluoride = 7.51 x 10⁴kg
Volume of uranium hexafluoride = 1.47 x 10^6 L
Density of uranium hexafluoride in g/mL
Mass in g = (7.51 x 10⁴) * 1000 = 7.51 × 10^7
Volume in mL :
1 L = 1000 mL
1.47 x 10^6L = (1.47 x 10^6)×1000 = 1.47 x 10^9 mL
Density = mass / volume
Density = 7.51 × 10^7 g / 1.47 x 10^9 mL
Density = 5.1088435 × 10^7-9
Density = 5.1088435 × 10^-2 g/mL
= 0.0510884
Density = 0.0511 g/mL
A coyote and an oak tree both reproduce ?
Answer:
YESExplanation:
Coyotes and oak trees are multicellular organisms and multicellular organisms reproduce asexually and sexually.
Many multicellular lower plants give off asexual spores, either aerial or motile and aquatic (zoospores), which may be uninucleate or multinucleate.
Which is warmer 10c or 30f
Answer:
your answer is 30f
Explanation:
The coldest possible temperature, or absolute zero, is -273.15 degrees Celsius, or 0 degrees Kelvin. So, 10 degrees Celsius (and this shouldn't be taken too literally) is in fact only about 1.8 per cent warmer than 5 degrees, and 30 degrees is only about 5.2 per cent warmer than 15 degrees.
Which statement describes a property that is unique to metalloids?
Metalloids are shiny.
Metalloids are semiconductive.
O Metalloids are solid.
O Metalloids are brittle.
The statement that described a property that is unique to metalloids would be that they are semiconductive.
Generally, semiconductors are material that at equilibrium between the conductive nature of conductors and non-conductive nature of insulators. In other words, semiconductors are not as conductive as conductors neither are they total insulators.
Semiconductivity is a property that is unique to metalloids because their electrons are more strongly bound to the nucleus of their atoms than those of metals.
Shiny, solid, and brittleness are properties that are shared among a wide variety of materials but semiconductivity is a property that is unique to metalloids.
More on metalloids can be found here: https://brainly.com/question/24167304
Answer: Bbbbb
Explanation:
What are major companies that sell most plastic straws ?
Answer:
One of the biggest global suppliers of plastic straws is Tetra Pak:
How did Socrates influence the history of the atom?
Answer:
Since Socrates didn't leave any written works, we can only learn from his disciple Plato. Plato wrote that Socrates believed in an atomic theory, just not like the one we believe now. We can assume that both Plato and Socrates believed that atoms were geometric forms that were all made up of triangles.
They believed in 4 elements, so we can say that their atomic theory was based on a periodic table made up of:
fire (tetrahedron)air (octahedron)water (icosahedron)earth (cube)I guess that their major influence was that all elements could be broken down into smaller parts or atoms, in this case some type of triangle.
Describe the pattern observed in volume measurements as different masses or volumes of the unknown solid or liquid were selected. Explain why this pattern exists.
Answer:
Throughout the expansion segment below, the definition including its instance specified is defined.
Explanation:
Volume is the sum of space filled by measurement of material throughout 3 directions. The volume of either a compound is mainly determined by the amount and the process including its molecules.The larger the volume as well as strength including its solid as well as liquid, the greater the total weight.That's because the combined volume or total weight is supposed to have been significantly greater. After all, there is so much mass.
For groups 13 through 18, the number of valence electrons is equal to the group number?
plus 1
plus the period number
minus the period number
minus 10
Answer:
22
Explanation:
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, the correct option is option D.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet. For groups 13 through 18, the number of valence electrons is equal to the group number minus 10.
Therefore, the correct option is option D.
Learn more about periodic table, here:
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*BRAINLEST* is nitrogen gas an element, compound, homogenous mixture, or a heterogeneous mixture? :)))
Answer:
Nitrogen gas is a homogenous mixture!
Neither a compound nor a combination, nitrogen gas ([tex]\rm N_2[/tex]) is neither. It is an element.
A pure material made up of just one kind of atom is called an element. When it comes to nitrogen gas, two nitrogen atoms are chemically linked together to form diatomic nitrogen molecules. A compound, on the other hand, is a substance that is created through the chemical fusion of two or more elements in a predetermined ratio. Since there is no chemical link between any other elements and the nitrogen atoms that make up nitrogen gas ([tex]\rm N_2[/tex]), it is not a complex.
It is crucial to remember that mixes entail the blending of several chemicals, regardless of whether nitrogen gas is homogenous or heterogeneous. Nitrogen gas, on the other hand, is not a mixture either. It is made entirely of identical nitrogen molecules and is a pure material.
To know more about nitrogen, here:
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Density = Mass / Volume Density = 35.062g / 23.50 mL =
Answer:
Density = 1.492g/mL
Explanation:
hope that will help you
what is a mass number
Answer:
What is an mass number?
Mass number is an integer (whole number) equal to the sum of the number of protons and neutrons of an atomic nucleus. In other words, it is the sum of the number of nucleons in an atom. Mass number is often denoted using a capital letter A. Contrast this with the atomic number, which is simply the number of protons.
Explanation:
If you start with a substance as a solid, what will happen to the molecules as you add thermal energy (heat) (not melting like would it viberate ect)
Answer:
the molecules will move faster
which liquid is least dense and more dense between: water. oil. gasoline, seawater, and syrup
Answer:
most dense is syrup least dense is gasoline.
How many protons are in the following atom?
Answer:
This is Lithium and Lithium had 3 protons
Explanation:
Note:The number that is red (3) is the proton number.
The top left number(7) is the nucleon number.
If the question ask the electron number.. It's also 3 because PROTON AND ELECTRON ARE THE SAME
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When copper metal is heated to 1100 oC it melts. Is this a chemical or physical change? Explain your answer
Answer:
it is a physical change
A patient’s blood sample is 8.5mL, and 3 drops of a chemical are added to test the solution. Each drop is 0.05mL. What is the final volume of the solution
Answer:
4tbs
Explanation:
A 75-lb dog must be dewormed. If the daily dose of the dewormer is 1 tsp/25 lb of body weight for 3 days, approximately how much should be given each day?
1 tbs = 3 tsp
answer: 1 tbs
