Answers
Related Questions
Uniformitarianism states that the geologic processes occurring in the past are the same processes that are occurring today.
Processes we see happening on Earth today have occurred for millions of years, forming the rocks and landforms around us. In the
Kimberley Region of Western Australia, there is a Devonian limestone formation with a structure similar to today's Barrier Reef. It
is composed largely of corals. Based on the principles of uniformitarianism, what can we infer about this region back in the
Devonian period?
A) The Kimberly region is composed of sedimentary rocks deposited over
millions of years since the Devonian period.
B) Because modern corals live in warm, shallow seas, we can infer the same
environment existed during the Devonian period, where the Kimberleys are
today
C) We can infer that the climate has not changed over millions of years in the
Kimberly region of Australia and both biotic and abiotic factors remain
constant over time.
D) Because modern corals live in warm, shallow seas, we can infer that over
millions of years the animals that comprise the reefs have adapted to
changes in environmental conditions in the Kimberly area.
Answers
Answer:
B) Because modern corals live in warm, shallow seas, we can infer the same
environment existed during the Devonian period, where the Kimberleys are
today
Explanation:
Based on the law of Uniformitarianism we can infer the environment that existed during the formation of the Devonian limestone and the Barrier Reef today.
Since the process that occurs in times past are still occurring today, the depositional environment must have been the same. The limestone in Kimberly suggests that they must have formed under warm, shallow sea very similar to that of the Barrier reef today. This interpretation is only made possible by the law of uniformitarianism.Answer: B
Explanation: USA test prep, K12
What happens if you are in a swimming
pool and you push a beach ball down
with your hands?
Answers
Answer:
it will float back up because it's not dense enough to go down
Based on the magnetic field lines shown, what is the orientation of the mystery magnet?
N-S
None of the above.
S-N
Cannot be determined.
Answers
is your answer question yes
create a hypothesis that can be tested in an experiment
Answers
What is the atomic mass
of an atom of calcium,
Ca?
Answers
The atomic mass is usually listed underneath the chemical symbol. The units associated with molar mass is grams per mole (g/mol).
Therefore, the atomic mass of calcium (Ca) is 40.08 g/mol.
Hope this helps!
Which two of the given elements have the most similar chemical properties Mg, Ar, As, Sr
Answers
Answer:
Here is your answer
Explanation:
Mg and sr
Which answer is the best comparison of the physical sciences to the life sciences. A. Physical science is the study of energy and inanimate matter. Life science is the study of living organisms. B. Physical science is the study of proper exercise and diet. Life science is the study of how humans and animals relate to one another. C. Physical science is the study of objects outside the Earth's atmosphere. Life science is the study of life in or under Earth's atmosphere. D. Physical science is the study of energy and inanimate matter. Life science is the study of the behavior of humans and animals.
Answers
Answer:
A. Physical science is the study of energy and inanimate matter. Life science is the study of living organisms.
Explanation:
Sciences can be grouped into physical science and life sciences. PHYSICAL SCIENCE is a branch of science that involves the study of energy and inanimate objects i.e lifeless. Physical science encompass the following: physics, chemistry, astronomy, geology etc.
On the other hand, LIFE SCIENCES, as the name implies, is the study of living organisms. It is also referred collectively to as BIOLOGICAL SCIENCES and it includes aspects such as biology, botany (plant), zoology (animal), microbiology (microbes), biochemistry etc.
Answer:
its a for plato
Explanation:
In an experiment, a student collects 107 mL of H2 over water at a pressure of 104.8 kPa and a temperature of 30°C. How many grams of H2 are present?
A) 0.024 g
B) 4.00 g
C) 0.04 g
D) 0 049 g
And why
Answers
Answer:
The answer options provided are incorrect. The correct answer is 0.009g
Explanation:
Using PV = nRT
Where;
P = pressure (atm)
V = volume (L)
R = gas constant (0.0821 Latm/Kmol)
T = temperature (K)
n = number of moles
Based in the information provided;
V = 107mL = 107/1000 = 0.107L
P = 104.8kPa = 104800 Pa = 1.03atm
T = 30°C + 273.15 = 303.15K
PV = nRT
1.03 × 0.107 = n × 0.0821 × 303.15
0.1102 = 24.89n
n = 0.1102/24.89
n = 0.0044 mol
mole = mass/molar mass
Molar mass of H2 = 2g/mol
mass = molar mass × mole
mass = 2 × 0.0044
mass = 0.0088
mass = 0.009g
what do you mean by atomic number?
Answers
Answer:
Atomic number is the number of protons in an isotope or element.
Explanation: The atomic number is the same number of protons in an element or isotope and if said isotope is neutral than it is the same number of electrons.
Example: Atomic number = 19 Protons = 19 if neutral Electrons = 19
HELP ME, MARKED AS BRAINEST
Answers
Answer:
The answer is B
Explanation:
2Na + 2H2O = 2NaOH + H2
Which correctly lists the three main ocean zones
pls answer 15 points
Answers
Answer:
Deep zone, surface zone and transition zone.
Answer:
The answer is C. neritic, intertidal, open ocean.:) :) !!!!Explanation:
Na + H2O -> NaOH +H2 stoichiometry?
Answers
Answer:
Sodium + Water = Sodium Hydroxide + Dihydrogen
Explanation:
eaction of sodium with water
Sodium metal reacts rapidly with water to form a colourless solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.
To ensure that a vehicle crash is inelastic, vehicle safety designers add crumple zones to vehicles. A crumple zone is a part of a vehicle designed to crumple easily in a crash. Use Newton’s second law to explain why crumple zones reduce the force in a collision.
Answers
Answer:
well because with the velocity of the two, using the second law, it can slow the velocity before there is a casualty.
Explanation:
What is the correct name for H5P2?
Answers
Answer:
Diphosphanium
Explanation:
mark brianliest
When the element selenium (Se) ionizes to have a complete valence shell of electrons, the
result will be an lon that is?
Answers
Answer:
Positively Charged
Explanation:
The is a group XVI and period 4 element of the periodic table with similar physical and chemical to that of tellurium and sulfur. Selenium exist in different allotropic forms, which have different solubility including selenate, selenite and selenium in elemental form
The Se ion in selenate has a positive charge of +6, while the selenate ion has a charge of -2
The Se ion in selenite has a charge of +4, while the selenite ion has a negative charge of -2.
The charge of Se in elemental selenium is 0.
A laboratory bottle of helium gas occupies a volume of 2.0 L at 760 mm Hg. Calculate the new pressure if the
volume falls to 1.8 L.
Answers
Answer:
844.4 mmHgExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question we have
[tex]P_2 = \frac{2 \times 760}{1.8} = \frac{1520}{1.8} \\ = 844.4444...[/tex]
We have the final answer as
844.4 mmHgHope this helps you
HeLp Me PlEaSe , Ill MaRk YoU bRaInLiEsT !
Answers
Answer:
are you aking an NWEA?
Explanation:
An atom's nucleus contains three protons and three neutrons. What is the
overall charge of the nucleus?
A. O
B. +3
C. -3
D. +6
Answers
Answer:
Explanation: A.0
1. What is the definition of a chemical property?
Answers
Answer:
that can be established only by changing a substance's chemical
Explanation:
Answer:
A chemical property is a characteristic of a substance abserved in chemical reactions.
Explanation:
Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.
If 9.8g water is used in electrolysis, what is the percent yield if 5.6g of oxygen was
collected after the experiment?
H20 --> H2 + O2
Answers
Answer:
Approximately [tex]64\%[/tex].
Explanation:
[tex]\displaystyle \text{Percentage Yield} = \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100\%[/tex]
The actual yield of [tex]\rm O_2[/tex] was given. The theoretical yield needs to be calculated from the quantity of the reactant.
Balance the equation for the hydrolysis of water:
[tex]\rm 2\, H_2O \, (l) \to 2\, H_2\, (g) + O_2\, (g)[/tex].
Note the ratio between the coefficient of [tex]\rm H_2O\, (g)[/tex] and [tex]\rm O_2\, (g)[/tex]:
[tex]\displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} = \frac{1}{2}[/tex].
This ratio will be useful for finding the theoretical yield of [tex]\rm O_2\, (g)[/tex].
Look up the relative atomic mass of hydrogen and oxygen on a modern periodic table.
[tex]\rm H[/tex]: [tex]1.008[/tex].[tex]\rm O[/tex]: [tex]15.999[/tex].Calculate the formula mass of [tex]\rm H_2O[/tex] and [tex]\rm O_2[/tex]:
[tex]M(\mathrm{H_2O}) =2\times 1.008 + 15.999 = 18.015\; \rm g \cdot mol^{-1}[/tex].
[tex]M(\mathrm{O_2}) =2\times 15.999 = 31.998\; \rm g \cdot mol^{-1}[/tex].
Calculate the number of moles of molecules in [tex]9.8\; \rm g[/tex] of [tex]\rm H_2O[/tex]:
[tex]\displaystyle n(\mathrm{H_2O}) = \frac{m(\mathrm{H_2O})}{M(\mathrm{H_2O})} = \frac{9.8\; \rm g}{18.015\; \rm g \cdot mol^{-1}} \approx 0.543991\;\rm g \cdot mol^{-1}[/tex].
Make use of the ratio [tex]\displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} = \frac{1}{2}[/tex] to find the theoretical yield of [tex]\rm O_2[/tex] (in terms of number of moles of molecules.)
[tex]\begin{aligned} n(\mathrm{O_2}) &= \displaystyle \frac{n(\mathrm{O_2\, (g)})}{n(\mathrm{H_2O\, (aq)})} \cdot n(\mathrm{H_2O}) \\ &\approx \frac{1}{2} \times 0.543991\; \rm mol \approx 0.271996\; \rm mol \end{aligned}[/tex].
Calculate the mass of that approximately [tex]0.271996\; \rm mol[/tex] of [tex]\rm O_2[/tex] (theoretical yield.)
[tex]\begin{aligned}m(\mathrm{O_2}) &= n(\mathrm{O_2}) \cdot M(\mathrm{O_2}) \\ &\approx 0.271996\; \rm mol \times 31.998\; \rm g \cdot mol^{-1} \approx 8.70331 \; \rm g \end{aligned}[/tex].
That would correspond to the theoretical yield of [tex]\rm O_2[/tex] (in term of the mass of the product.)
Given that the actual yield is [tex]5.6\; \rm g[/tex], calculate the percentage yield:
[tex]\begin{aligned}\text{Percentage Yield} &= \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \times 100\% \\ &\approx \frac{5.6\; \rm g}{8.70331\; \rm g} \times 100\% \approx 64\%\end{aligned}[/tex].
Polar molecules have _____.
Answers
Answer:
Iconic bonds.
What element is Group 10, period 4
Answers
Answer:
Nickel
Explanation:
Some people say that only gay and bisexual men are likely to be infected with hub true false
Answers
Answer:
They do have a larger chance, but others might be infected too.
PLS GIVE BRAINLIEST
Answer:
thats false, yes they have a bigger chance but anyone can get it.
Explanation:
Which phrase describes one type of freshwater wetland
Answers
Answer:
Small streams that flow into larger streams and wetlands
Explanation:
Hope this helps, have a great day (;
Answer:
D
Explanation:
verifyed got me the answer!
How can I get the 3 sig figs of this number 187515.4207
Answers
Answer:
1.88 x 10^5
Explanation:
You have to round because all of the numbers in 187515.4207 are significant
Round to: 188000
Put in scientific notation:
1.88 x 10^5
Answer:
well scientific notation would be = 1.875154207 × 10^5
you cant rlly simply the number any further to get 3 sig figs
youd need something like 187 to be 3 sig figs
are you saying the question correctly?
help me with these problems please.
d. 6751 mL to liters. express your answer to four significant figures and include the appropriate units.
Answers
Answer: 6751 L
Explanation:
1000 mL = 1 L
so dividing 6751 by 1000 gives .6751 L
HELP ILL GIVE 100 POINTS
If you put a piece of zinc into a solution of copper (I) sulfate and allow the single replacement reaction to go to completion, how will you know which of the reactants is the limiting reactant? Write the balanced equation, including the states of matter of the reactants and products, to help support your answer.
Answers
7. Calculate the amount of sodium hydroxide you will need to make 250 mL of a 0.1 M solution of sodium hydroxide.
Answers
Answer:
1 g
Explanation:
Given data:
Volume of solution = 250 mL (250 mL × 1 L/1000 mL = 0.25 L)
Molarity of solution = 0.1 M
Amount of sodium hydroxide = ?
Solution:
Molarity = number of moles / volume in L
0.1 M = number of moles /0.25 L
Number of moles = 0.1 M × 0.25 L
M = mol/ L
Number of moles = 0.025 mol
Mass of sodium hydroxide:
Mass = number of moles × molar mass
Mass = 0.025 mol ×40 g/mol
Mass = 1 g
For a science project, Janet performs four experiments that are supposed to show a chemical reaction. She displays her results in a table. A 4-column table with 4 rows. The first column titled experiment has entries 1, 2, 3, 4. The second column titled substances has entries water + heat, vinegar + baking soda, cabbage juice + lemon juice, liquid A + liquid B. The third column titled evidence of reaction has entries gas formation, gas formation, color change, precipitate formation. The fourth column titled Chemical Reaction ? has entries yes, yes, yes, yes. In the column titled "Chemical reaction?,” which experiment’s data should be changed to "No”? Experiment 1 Experiment 2 Experiment 3 Experiment 4
Answers
Answer: D
Explanation:
Which substance particle will be attracted by a positively charged object
Answers
Answer:
Protons
Protons are another type of subatomic particle found in atoms. They have a positive charge so they are attracted to negative objects and repelled from positive objects.
Explanation: