The __ increases by 1 as you go left to right across the periodic table.
A. Atomic mass
B. Atomic number
C. Number of neutrons
D. Number of ions
Answer C
Which of the following best explains the role of heat and pressure in the rock cycle?
a. The molten rocks solidify by this process.
b. The sediments are deposited by this process.
c. They change the mineral composition of rocks.
d. They transport sediments from one place to another.
Answer:
is there a all of above if not then a i would say
Explanation:
The half-life of francium-212 is 19 minutes. How many minutes will it take for 100 gram
of this isotope to decay to 12.5 grams?
Answer:
57 mins
Explanation:
From the question given above, the following data were obtained:
Half life (t₁/₂) = 19 mins
Original amount (N₀) = 100 g
Amount remaining (N) = 12.5 g
Time (t) =?
Next, we shall determine the number of half-lives (n) that wound have elapse for 12.5 g of the sample to remain. This can be obtained as follow:
Original amount (N₀) = 100 g
Amount remaining (N) = 12.5 g
Number of half-lives (n) =?
N = 1/2ⁿ × N₀
12.5 = 1/2ⁿ × 100
Cross multiply
12.5 × 2ⁿ = 100
Divide both side by 12.5
2ⁿ = 100 /12.5
2ⁿ = 8
Express 8 index with 2 as the base
2ⁿ = 2³
n = 3
Finally, we shall determine the time taken for 100 g of the isotope to decay to 12.5 g. This can be obtained as follow:
Half life (t₁/₂) = 19 mins
Number of half-lives (n) = 3
Time (t) =?
t = n × t₁/₂
t = 3 × 19
t = 57 mins
Thus, it will take 57 mins 100 g of the isotope to decay to 12.5 g.
If the electronnegavity difference between elements A and X is 0.8, the bond in AX will most likely be what?
Answer:
Polar covalent bond
Explanation:
When the electronegativity difference between two elements A and X is 0.8, the bond AX formed will most likely be a polar covalent bond.
A polar covalent bond is one whose electronegativity difference is between 0.5 and 2.1.
In such a bond type, we have heteronuclear species with one of the species having a higher electronegativity value.
When electronegativity difference is less than 0.5, a non-polar covalent bond forms. If the value is greater than 2.1, an ionic bond will form.3. Determine the uses of the following materials:
(b) Bronze (c) Sulphur
ed
(d) Iodine
(a) Brass
Answer:
D
Explanation:
D
plzz help guyss I'm so confused
Starting from rest, you reach a speed of 20 m/s in 4 seconds. What is your acceleration?
Pls help pic included
carbon ...
...............
how many calories are in water
Answer:
none
Explanation:
Answer:
Calories
Explanation:
Depends on what type of water your drinking, for example, flavored water has calories but original water has 0 calories.
Hope this helped!
Now that you know the molar mass of the
empirical formula, you can divide it into the molar
mass of your compound to find the scaling factor.
What is the scaling factor if the molar mass of
this compound, having an empirical formula of
CH20, is 150 g/mor?
The molecular formula C₅H₁₀O₅ and The scaling factor =5
Further explanationGiven
Molar mass = 150 g/mol
The empirical formula = CH₂O
Required
The scaling factor
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
n = the scaling factor
(CH₂O)ₙ=150 g/mol
(12+2+16)ₙ=150
(30)ₙ=150
n=5
The molecular formula : C₅H₁₀O₅
Atoms of which pair of elements will form covalent bonds in a compound?
O A. Li and Br
O B. P and CI
O c. Ti and o
D. Ti and Ni
Answer:
B. P and Cl
Explanation:
Hello
can you help me out here!
1) They are a pipe like consisting of specialised cells. They transport substances and form a two way traffic in plants
a) Xylem tissue
b) phloem tissue
c) Root hair
d) Vascular tissue
Answer:
B
Explanation:
because Phloem tissue consists of a group of specialized cells. Sieve tubes are elongated tubular conducting channels of phloem through which food is transported. The contents of phloem can move in the upward as well as in the downward direction. Therefore, they form two-way traffic in plants.
Answer:
Phloem
Explanation:
Xylem transports water by action of trandpiriation pull, capillary action and root pressure. Phloem consists of sieve tubes and companion cells. The phloem is made of tubes and cells basically.
How does sexual reproduction increase the chance of a population's survival?
A. Offspring are produced in greater numbers
B. Offspring are produced in a shorter amount of time
C. Sexual reproduction produces offspring in both plants and animals
D. Sexual reproduction produces more genetically diverse offsprings
C? i think, the rest just isnt right. i wouldve thought there was an answer that would say "it provides us with more organisms" but the closest one to that is C
Answer:
D
Explanation:
the more genetic variation in a population the better their chances are to survive
What is CO??????????
Which generates waves that are capable of traveling through a vacuum?
a light bulb
O a speaker
earthquake activity
volcanic eruption
Answer:
Light bulbs
Explanation:
light waves are electromagnetic waves which can travel through a vacuum
Which of the following would be an example of Beta decay?
Answer:
si- 26 > Mg22
Explanation:
it is less than what you started with.
What is the % Oxygen in or the compound Cobalt V Carbonate? Co2(CO3)5
The % Oxygen in the compound Cobalt V Carbonate : 57.42%
Further explanationGiven
Compound Cobalt V Carbonate- Co₂(CO₃)₅
Required
% composition of Oxygen
Solution
Number of Oxygen in Co₂(CO₃)₅ = 3 x 5 = 15
Molar mass of Cobalt V Carbonate- Co₂(CO₃)₅ :
=2.Ar Co + 5.Ar C+15. Ar O
=2.59 + 5.12 + 15.16
= 118+60+240
=418 g/mol
% Oxygen = (15.Ar O / MW Co₂(CO₃)₅) x 100%
% Oxygen = (240/418) x 1005
% Oxygen = 57.42
The heating curve shows the energy gain of a substance as it changes from solid to gas. Which section of the graph shows the liquid phase of
the substance gaining kinetic energy?
Answer:
phase c show the liquid bas it is less from 100 and more from 0
Large food molecules are broken down into glucose the cells can use in the __________ system.
Answer:
digestion
Explanation:
he mouth. Digestion begins even before the food enters the mouth.
through digestion large food particles are converted into smaller components that can be readily absorbed into the bloodstream surcrase binds to the active site of sucrase and the put stress on the bond between the two sugars that make up sucrase the bond breaks releasing glucose and fructose
What determines the severity of the storm?
Answer:
A thunderstorm is classified as “severe” when it contains one or more of the following: hail one inch or greater, winds gusting in excess of 50 knots (57.5 mph), or a tornado. ... There are about 100,000 thunderstorms each year in the U.S. alone. About 10% of these reach severe levels
Explanation:
does something that is hot have more thermal energy than something that’s cold?
Answer:
Yes it does because the atoms/molecules are moving faster than they are in a cold substance.
Explanation:
4. Which statement is true?
a. A prokaryote has a nucleus
b. Antibiotics kill eukaryotes
c. Prokaryotes are nonliving
d. Eukaryotes have membrane-bound organelles
Answer:
d
Explanation:
Hope this helps and have a great day!!!
Acid rain can be destructive to both the natural environment and human-made structures. The equation below shows a reaction that occurs that may lead to the formation of acid rain.
3NO2 + H2O Right arrow. 2HNO3 + NO
How many moles (precise to the nearest 0.01 mol) of nitric acid are produced from 300.00 mol of nitrogen dioxide?
Answer:
200.00 mol
Explanation:
Nitric acid: Nitrogen dioxide is 2:3
and nitrogen dioxide is already 300.00 mol so using the ratio, nitric acid is 200.00 mol
Answer:
200.00
Explanation:
Did it on edge GL
Charlotte completed an experiment in which she investigated and discovered that an electrically charged object can attract an uncharged object without any contact. She used a PVC pipe and small pieces of paper for her experiment. Each time, she rubbed the PVC pipe with a cloth to give it a charge and then held it over paper. What would be Charlotte's control group in this experiment?
1. Using the cloth and rubbing it against the PVC pipe
2. Taking the pieces of paper and rubbing it against the cloth
3. Not rubbing the cloth against the PVC pipe or the paper
4. Rubbing the cloth against both the paper and the PVC pipe
Charlotte's control group in this experiment would be "Not rubbing the cloth against the PVC pipe or the paper." (C)
Answer:
C. Not rubbing the cloth against the PVC pipe or the paper
Explanation:
Hope this helped! :)
During the nineteenth century, biologists knew that South America and Africa contained similar fossils. These fossils led them to believe that a temporary land bridge between South America and Africa allowed
ancient species to move between both continents. In the twentieth century, evidence showed that South America and Africa were once part of the same larger continent and that there were no land bridges
between them. How should biologists respond to the new geological finding?
A) Biologists should reject the geological finding, because it is new.
B) Biologists should ask physicists what to do, because physics is a more exact science.
C) Biologists should reject the belief in ancient species, because there were no land bridges.
D) Biologists should update the history of life, because it should include the new geological finding.
Answer:
c
Explanation: yes
The biologists respond to the new geological finding reject the belief in ancient species, because there were no land bridges. Therefore, option C is correct.
What are fossils ?The term fossils are defined as the remains or traces of ancient life that have been preserved by natural processes. The examples of fossils are microbes, exoskeletons, objects preserved in amber, petrified wood, coal, hair, oil, and DNA remnants.
Fossils are formed in several ways, but mostly they are formed when a living organism such as a plant or animal are dies and is quickly buried by in mud, sand or volcanic ash.
The biologists respond to the new geological finding reject the belief in ancient species, because there were no land bridges.
Thus, option C is correct.
To learn more about the fossils, follow the link;
https://brainly.com/question/6867325
#SPJ2
How many atoms are represented in the molecular formula for the molecule
Heptane. C7H16
A. 7
B. 16
C. 23
D. 24
Answer:
7
Explanation:
Heptane is a hydrocarbon. There are 7 carbon atoms
Answer:
yea lol
Explanation:
duh
What type of rock is made of dead plant/animal material?
Answer:
Sedimentary rocks
Explanation:
Sedimentary rocks are made of bits and pieces of rocks that have been eroded away, shells, and the remains of dead plants and animals. As larger rocks are exposed to the elements on Earth such as rain, wind, freezing, thawing, and plant roots growing, they are slowly worn away.
When the sun shines and heats something, that energy is called-
Answer:
Solar energy.
Answer:
All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum.
A solution is prepared by dissolving 25.1 g urea, (NH2)2CO, in 170.9 g water. Calculate the boiling point of the solution. Urea is a nonelectrolyte.
Answer:
101.260 ° C
Explanation:
From the given information;
The molarity of lactose solution (m) can be calculated as:
[tex]m = \dfrac{25.1 \times \dfrac{1 \ mol \ (NH_2)_2 \ CO}{60.01 g} }{0.170 \ kg }[/tex]
m = 2.46 m
The molar elevation constant of water [tex]k_b = 0.512 ^0 \ C/m[/tex]
Using the elevation in boiling point ;
i.e.
[tex]\Delta T_b = k_b \times m[/tex]
[tex]\Delta T_b = 0.512 \ ^0C/m \times 2.46 \ m[/tex]
[tex]\Delta T_b = 1.260 \ ^0C[/tex]
The boiling point of water solvent;
[tex]T_{water \ solvent} = 100^0 C[/tex]
Elevation in boiling point;
[tex]T_b = T_{solution} - T_{water \ solvent}[/tex]
[tex]T_{solution} = T_b+ T_{water \ solvent}[/tex]
[tex]T_{solution} = 1.260 \ ^0 C + 100 ^ 0 \ C[/tex]
[tex]T_{solution} = 101.260 \ ^0 C[/tex]
What's the billiard ball model?
Answer:
A ball, just a plane ball that is what dalton thought the atom looked like.
Explanation:
Which statement is true of a food web?
A. Producers have the greatest amount of available energy.
B. Decomposers have the greatest amount of available energy.
C. Primary consumers have the greatest amount of available energy.
D. Secondary consumers have the greatest amount of available energy.
Answer:
A= producers have the greatest amount of available energy
Explain how lone pairs of electrons influence the shape of a molecule.
Explanation:
the lone pairs will be negatively charged. these have a repulsion effect on other negatively charged electrons in the shells of atoms. picture a water molecule: the lone electron pair on the top of the oxygen will have a repulsion force on the 2 hydrogen atom's orbiting electrons to cause a bent molecular geometry.
