Answer:
Explanation:
D. solvent
Answer:
a solution
Explanation:
Verified test check.
a mixture in which substances are distributed evenly
Why do scientists create proxies?
Answer:
Proxies enable scientists to recreate climate conditions in different parts of history.
Explanation:
Proxies are characteristics of the weather in a certain period of time that have been preserved for different weather measurements like temperature, humidity, wind direction, and amounts of precipitation. The reason scientists create proxies because it "enables them to recreate climate conditions from different parts of time to have a better understanding on what weather was like during that time period."
Hope this helps.
Convert 3,526 meters (m) into kilometers (km). (Don't forget units)
EN
Voranean
Answer:
3,526 meters (m) into kilometers (km) = 0.003526 kilometers
Explanation:
What is the mass in grams of 100 atoms of carbon? (put answer in one significant figures)
(To enter an answer using Scientific Notation use "e.” For example, 6.022 x 1023 would be entered
as 6.022e+23 or 6.626 x 10-34 would be entered as 6.626e-34)
[word1]
Since we are starting from the number of atoms of Sulfur, we need to know two sets of formulas:
mass = moles × molar mass
moles = atoms ÷ Avogadro's Number
⇒ mass = (atoms ÷ Avogadro's Number) × molar mass
mass = [(100 atoms) ÷ (6.022 × 10²³ atoms/mole)] × (12.011 g/mol)
= 1.99 × 10⁻²¹ g
≈ 2e-21 [to 1 sig fig]
the mass of a sample of S containing 2.01×10²⁴ atoms is 1.99 × 10⁻²¹ g.
Which metalloid has five valence electrons in the fourth electron shell?
antimony
germanium
selenium
arsenic
Answer:
A- antimony
Explanation:
Answer:
A
Explanation:
The human body is about 9.5% carbon atoms, with a small fraction of that carbon being radioactive carbon-14. Carbon dating is a method of determining the age of things made of once living materials. What information would be needed to find the age of a human fossil or the Dead Sea Scrolls?
Answer:The age can be determined by utilizing carbon-14, a radioactive isotope of carbon.
Explanation:
which of the beryllium halides are considered ionic compounds?
Answer:
Beryllium Fluoride (BeF2) is an ionic compound
what is the maximum time food can remain in the temperature danger zone
Answer:2 hours
This range of temperatures is often called the "Danger Zone." Never leave food out of refrigeration over 2 hours. If the temperature is above 90 °F, food should not be left out more than 1 hour. Keep hot food hot—at or above 140 °F.
Explanation:
I NEED OXIDATION AND REDUCED FOR BOTH ASAP PLS HELP (make sure its correct)
H2F5BLi
How many atoms are in the chemical formula?
Answer:
eight atoms
hope it helps
How many metals, nonmetals and metalloids are there in the periodic table?
Answer:
113 because there are 113 elements
Explanation:
How many protons and neutrons are in the third isotope?
Answer:
6 protons and 7 neutron
Explanation:
Carbon has a third isotopes named carbon-13
All carbon isotopes have 6 protons .
This is called atomic number. To make it up to 13 in carbon -13 you will need 7 neutrons and 6protons .
If the atomic number is bigger then is the nuclear charge also bigger
Answer:
No
Explanation:
When atomic number is increasing its atomic mass increases
Atomic number doesn't affect nuclear charge
Two scientists work together on an experiment, but they have different hypotheses. When scientists look at the experimental results, they interpret the data in different ways and come to different conclusions. Which of the following does this situation best illustrate?
Answer:
The correct answer is option D, confirmation bias.
The correct answer is option D, confirmation bias.Confirmation bias is the tendency to interpret data in a way that confirms the already designed hypotheses.
The correct answer is option D, confirmation bias.Confirmation bias is the tendency to interpret data in a way that confirms the already designed hypotheses.As the two scientists interpret the data (or experimental results) in different ways to adhere to the different hypotheses. this is also called indicative of cognitive bias. This is also called inductive reasoning where the premise is viewed as evidence for the validity of the conclusion.
Answer:
d
Explanation:
got it right on plato
What is photosynthesis?
Answer:
when the sun's light hits a living thing
the mass number for an atom is numerically equal to which quantity
Answer:
The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in an atom is its mass number minus its atomic number.
Explanation:
protons
The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.
A hypothetical element has an atomic weight of 42.8452 amu. There are three main isotopes of this element with mass numbers of 41, 43 and 44. The 44 amu isotope has a 8% abundance. What is the percent abundance of the isotope with the mass number of 41?
1. 7.740%
2. 12.04%
3. 92.26%
4. 46.00%
5. 12.34\%
Answer:
Answer is 46.00%
Explanation:
absolute mass= A1F1 +A2F2
100
42.8452= 44×8% + 41×( 100--F2)
100
so you get
F2= 46.00%
am not sure
What causes the liquid in a thermometer to rise?
Answer:
The level of colored liquid rises when the thermometer is placed in hot water. Heat causes the molecules of the liquid to get farther apart. The molecules of the liquid break down into atoms and take up more space.
Explanation:
What does the atoms of metals have
Answer:
I dont know
Explanation:
because I dont know
A landslide carries many tons of rock from a hillside into a valley. All of the plants in the valley are buried. New plants that begin to grow in the valley after the landslide will MOST LIKELY lack —
Answer: c
Explanation: i got a 100 on the test
what is the maximum theoretical number of water molecules with which, in theory, one urea molecule can hydrogen bond?
Answer:
The maximum number of molecules that one water molecule can hold through hydrogen bonding is 4 because the two hydrogen atoms of water can form two hydrogen bonds and the two lone pairs on oxygen can also form two hydrogen bonds. hope it helps
how much energy is released when 23 g of steam at 100 Celsius is condensed into liquid water?
H = mc∆T
H = 23g * 4.2J/g°C *(100°C - 0°C)
H = 9660 J
H = 9.66 KJ.
The energy released is 9.66 KJ.
Which change is likely to happen to an atom of the element strontium (Sr) during bonding?
(1 point)
It will gain electrons, forming a positive ion.
It will gain electrons, forming a positive ion.
It will give up electrons, forming a negative ion.
It will give up electrons, forming a positive ion.
It will gain electrons, forming a negative ion.
Answer: It will give up electrons, forming a positive ion.
During bonding, strontium atom will give up electrons, forming a positive ion.
STRONTIUM:
Strontium (Sr) is an element in group 2 of the periodic table. Just like every other element in group 2, strontium posseses two valence electrons in its outermost shell. Strontium will undergo bonding with other atoms by losing its two (2) valence electrons to form a cation i.e. a positively charged ion. Therefore, strontium atom will give up electrons, forming a positive ion when it undergoes bonding.Learn more at: https://brainly.com/question/21085681?referrer=searchResults
When piece of very hot metal releases energy into a cup of water, if the temperature of metal drops
by 426.7°C, and the final temperature of the metal is 31.2°C, what was the initial temperature of
the metal?
Answer: The answer is 457.9
Explanation: Realistically all you have to do is add both of the temperatures and then you can figure out the original heat. Since the heat drops 426.7 degrees and it comes to 31.2 degrees its 426.7 + 31.2 = 457.9.
What type of front is created when a warm air mass moves in to replace a
retreating cold air mass?
The type of fron created is a "warm" front.
an item composed of at least 3 identifiable different compounds
PLEASE LHELP
How many oxygen atoms are in 6 Carbon dioxide compounds (6co2)
Number 5
PLEASEE HELP
Answer:
12
Explanation:
6 moles multiplied 2 atoms of O2
That gives 12 atoms
how are the light reactions and the calvin cycle connected?
Answer:
The light reactions provide the Calvin cycle with oxygen for carbon fixation, and the Calvin cycle provides the light reactions with sugars to produce ATP. The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the Calvin cycle provides water and electrons to the light reactions.
Explanation:
The energy that drives the Calvin cycle comes from ATP and NADPH produced by the light reactions, that is, the energy capture reactions in the first stage of photosynthesis.
The Calvin cycle is a process that results from photosynthesis made by plants, through which Carbon dioxide is absorbed and transformed into organic material or biomass.
In the light phase, light energy is stored in organic molecules that provide energy to carry out the process (ATP) and have the ability to donate electrons (reducing power) to another molecule such as NADPH.These molecules formed in the light reactions participate in the reactions that make up this cycle during which carbon dioxide (CO2) taken from the atmosphere is fixed, incorporating it into the body in the form of glucose thanks to the action of the enzyme RuBisCo.Therefore, we can conclude that the molecules constituted in the light reactions (ATP and NADPH) participate in the reduction of carbon dioxide (CO2) through the series of reactions of the Calvin Cycle.
Learn more about the Calvin Cycle here: https://brainly.com/question/13984369
how does the shape of the periodic table relate to electron configuration?
The shape of the periodic table is related to the electron configuration of elements by the arrangement of periods which can be used to guess the highest energy levels of the atom. Additionally, the group to which an atom belongs is the number of Valence electrons it has.
The periodic table is a systematic arrangement of elements in order of their atomic number with a set of 7 rows called periods and a set of 8 or 18 Columns called Groups.
In essence, the period of an element is a measure of the highest energy level shell of such an element.Additionally, the group of an element is as determined by the number of Valence electrons in the outermost shell of such an element.Ultimately, the s-, p-, d-, and f- group elements are visibly arranged and can be identified from the shape of the periodic table.
Read more:
https://brainly.com/question/19456463
A. IH, III, IV
C. I, II and IV only
B. I, ll and Ill only
D. III and IV only
2. A liquid has the following properties: one-phase, colorless, boils at varying
temperature. Which of the following BEST describes the liquid?
A. solution
C. suspension
B. substance
D. heterogeneous mixture
3. Jill has an unopened box of a 2-meter foil labeled as 100% aluminum. Jill takes just a
thumb-sized piece of the aluminum foil. Which of the following statement is TRUE
about the piece of aluminum foil that Jill took compared with the rest that was left in
the box?
A. Its mass and melting behavior are different.
Bits mass and melting behavior are the same.
C. The mass is different, but the melting behavior is the same.
D. The mass is the same, but the melting behavior is different.
Answer:
2. A. solution
3. C The mass is different, but the melting behavior is the same