Answer:
1. 10
Explanation
when litmus paper is blue that means the solution is basic and 10 on the pH scale is the most basic out of all your options
What method of heat transfer occurs when your skin feels hot outside on a sunny, summer day?
A. Conduction
B. Radiation
C. Vibration
D. Convection
Answer:
B. Radiation
Explanation:
Lol this weekend I got a rlly bad sunburn and ik a lot ab the sun
The method of heat transfer occurs when your skin feels hot outside on a sunny, summer day is radiation. Therefore, option B is correct.
What is radiation ?Energy that emanates from a source and moves through space at the speed of light is referred to as radiation. This energy has wave-like qualities and is accompanied by an electric field and a magnetic field. Radiation may also be referred to as electromagnetic waves.
As a mutagen, radiation has the potential to eventually cause cancer. Radiation has the power to kill cells or harm the DNA within them, which impairs the cells' capacity for reproduction and may ultimately result in cancer. High energy particles flow through your body when radiation is present.
The DNA in our cells can be harmed by radiation. Acute Radiation Syndrome (ARS) or Cutaneous Radiation Injuries can result from high radiation doses (CRI). Cancer may develop later in life as a result of high radiation doses.
Thus, option B is correct.
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Benzoic acid contains 68.8% carbon, 4.95% hydrogen, and 26.25% oxygen. Find the empirical formula of benzoic acid.
Answer:
C7H6O2
Explanation:
Let;
68.8% of Carbon represents 68.8g
4.95% of Hydrogen represents 4.95g
26.25% of Oxygen represent 26.25g
Next, we convert each gram value to mole value by dividing by their respective molar mass {C = 12, H = 1, O = 16}
C = 68.8/12 = 5.73 mol
H = 4.95/1 = 4.95 mol
O = 26.25/16 = 1.64 mol
Next, we divide each mole value by the smallest (1.64mol)
C = 5.73 ÷ 1.64 = 3.49
H = 4.95 ÷ 1.64 = 3.02
O = 1.64 ÷ 1.64 = 1
Next, we multiply each ratio by 2 to obtain our simplest whole number ratio (empirical formula)
C = 3.5 × 2 = 7
H = 3.02 × 2 = 6
O = 1 × 2 = 2
Hence, the ratio of C, H and O is 7:6:2 and the empirical formula of benzoic acid is C7H6O2
Rocks that form from lava does not contain fossils. Explain why
As sedimentary rocks are formed from the accumulation of sediment, fossils can be buried and preserved over time, leading to the formation of fossil-rich sedimentary rocks.
What is Fossils?
Fossils are the remains or traces of prehistoric plants, animals, and other organisms that are preserved in rocks. Fossils provide valuable insights into the evolution of life on Earth, as they can help scientists to understand the types of organisms that lived in the past, how they evolved, and how they interacted with their environment.
Rocks that form from lava, such as igneous rocks, typically do not contain fossils because the high temperatures involved in the formation of lava can destroy organic matter, including the remains of plants and animals.
When lava flows onto the surface of the Earth, it can quickly cool and solidify, forming an igneous rock. This rapid cooling process does not allow for the preservation of any organic material that might have been present in the lava, including fossils.
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Identify the element whose ion can exist as 2+ or 4+?
A) Sodium
B) Lead
C) Sulfur
D) Calcium
Why should we try to use less oil, natural gas and electricity?
4. Ionic compounds conduct electricity when they are in the __ state
Answer:
Salts do not conduct electricity at the solid state since the ions are in a fixed position in the lattice. However, at the molten state or in solution, the ions are free and they can move within the liquid phase to serve as electrons shuttles and therefore, they become conductive.
Explanation:
Help, please :] What are the products of the reaction between magnesium and silver nitrate??
Answer:
magnesium(s) + silver nitrate(aq) → magnesium nitrate(aq) + silver(s). The reducing agent in this reaction is the Mg as it will donate electrons to the silver ions .
Explanation:
Why is it important for the daughter cells to divide a second time in meiosis?
The second division switches parts of matching chromatids to increase genetic variation.
The second division forms four identical cells to ensure that all offspring have the same
The second division sorts chromosomes into cells that are the same as the parent cells.
The second division forms haploid cells that can combine with other haploid cells during fertilization.
Answer:
The second division switches parts of matching chromatids to increase genetic variation.
Explanation:
Meiosis and fertilization create genetic variation by making new combinations of gene variants (alleles).
Assume that you have to prepare a 200 g salt solution, and the concentration must be 15 % by mass. How many grams of solute and water you must mix together.
Answer:
170 g
Explanation:
w/w% concentration = mass of solute/ mass of solution * 100
mass of solute = x
mass of solution = 200 g
w/w% concentration = 15 % by mass
15 = x/200 * 100
15 = 100x/200
200 * 15 = 100x
x = 200 * 15/100
x = 2 * 15
x = 30g
But mass of solution = mass of solute + mass of solvent
mass of solute = 30g
mass of solvent = mass of solution - mass of solute
mass of solvent = 200 g - 30 g
mass of solvent = 170 g
If an atom has an atomic mass of 101 and atomic number of 44, how many neutrons does it have?
You are currently in a stable orbit 9000 km (1km=1000m) from the center of planet Proxima Centauri B.
According to the calculations done by NASA, Planet Proxima Centauri B has a mass of approximately 7.6x10^24kg.
Based on fuel consumption and expected material aboard the ship, your colony ship lander has a mass of approximately 1.1x10^5 kg.
1. Using Newton's Law of Universal Gravitation, determine what the force of gravity on your ship at that orbit be using the early measurements
2.Using Newton’s second law determine the acceleration of your lander due to gravity
3.Upon arrival, you measure the actual force of gravity to be 6x10^5 N,which is different from your calculated value in question 1. Identify 2 specific possible causes that would account for the difference in expected vs. actual values, and why they would affect the calculation.
we had a sub and she didn't even explain the work-the teacher hasn't even been on the calls for a few days so it's like ''what?'
Explanation:
bro this question looks like Astrophysics
By using the universal gravitational law, the gravitational force between the lander and the planet is 688.4 × 10³ N. The acceleration due to gravity of the lander is 6.25 m/s² . The slight changes in gravity may be due to the change with different latitudes of the planet.
What is gravitational force?Gravitational force is the force by which an object attracts other objects into its center of mass. According to universal gravitational law, the gravitational force can be calculated for two masses m1 and m2 at a distance of r with gravitational constant G as follows:
g = G m1m2/r²
Apply the given values of mass and orbital radius to the equation as follows:
g = (6.647 × 10⁻¹¹ N m² Kg⁻²) (1.1 × 10⁵ Kg × 7.6×10²⁴ Kg ) / (9 × 10⁶ m)²
= 688.4 × 10³ N.
The acceleration due to gravity of the lander = force /mass
= 688.4 × 10³ N /1.1 × 10⁵Kg
= 6.25 m/s²
The actual force of gravity may change from the may slightly change from the calculated value because different latitudes will experience different gravity.
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Which of the following is a lanthanide?
A.gold(au)
B.barium(ba)
C.europium(eu)
D.americium(am)
HELP ASAP 20 OR MORE POINTS!!!!
In Brian Greene's "A Physicist Explains Why Parallel Universes May Exist", what reason does Greene give for why he believes parallel universes may exist?
Question 1 options:
Worm holes make traveling between parallel universes possible.
There are only so many ways matter can arrange itself within that infinite universe.
He has seen a parallel universe himself.
Scientists have already proven the existence of parallel universes.
Answer:
B: There are only so many ways matter can arrange itself within that infinite universe.
The idea of a parallel universe was supported by Brian Greene on the basis that there are only so many ways matter can arrange itself within that infinite universe.
A parallel universeMatter is anything that has mass and occupy space. The universe as we know it is filled with matter. The theory of multiple universe holds that there could be another universe apart from this one that we know.
This theory was supported by Brian Greene on the basis that there are only so many ways matter can arrange itself within that infinite universe.
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Is biden falling down the stairs funny or is it just me
Answer:
yes it is hilarious
Explanation:
good to find another republican lol
What makes a gas a gas?
Answer:
Gas is one of the four fundamental states of matter (the others being solid, liquid, and plasma). A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide).
Explanation:
The equation to be used to calculate kinetic energy ( E) is
Answer:
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
What is the density of 1.00 mol of carbon monoxide gas at STP?
Answer:
Density = mass / volume.
If this is an ideal gas then 1mol will take up 22.4L of volume (fact about ideal gases you should remember)
Since you have 1mol then you know the volume of the gas that you have (22.4L)
Now, just convert 1mol of CO to grams.The ptable tells you that the mass of 1 mol of C is 12g and the mass of 1 mol of O is 16g. So the mass of 1 mol of CO is......... :):)
Now you have the mass and the volume, so just divide :) enjoy
Scott and his family recently moved to a large city, where the air sometimes looks hazy from smog. These four steps could result in the formation of this smog:
Ozone forms.
Polluting gases react with sunlight.
Temperature inversion traps pollution.
Cars emit hydrocarbons and nitrogen oxides.
Which answer shows the order in which these steps occur?
A. 1, 2, 3, 4
B. 1, 2, 4, 3
C. 4, 1, 2, 3,
D. 4, 2, 1, 3
Answer:
D. 4, 2, 1, 3 is the correct answer.[tex] \infty \infty [/tex]
1. What is the major determining factor in soil formation? Define this factor and explain how it influences soil formation.
PLEASE HELP ME PLEASE
Answer:
Temperature and precipitation
Explanation:
They determine how quickly weathering will be, and what kind of organic material may be available on the inside of the soils.
Temperature and precipitation is the major determining factor in soil formation. They define the type of organic material that can be present inside the soils as well as how rapidly weathering will occur.
What is soil?The bioactive, porous media that has grown in the top layer of the Earth's crust is known as soil. Being a source of water as well as nutrients, a filter for harmful wastes, a site for their breakdown, and a participant inside the cycle of elements such as carbon through the planet's ecosystem, soil constitutes one of the main substrates of life on Earth.
It has changed as a result of weathering processes influenced by geographical, geologic, biological, and climatic factors. A practical understanding of soils including their management has also developed out of need since the development of agriculture with forestry in the eighth millennium BCE. Temperature and precipitation is the major determining factor in soil formation. They define the type of organic material that can be present inside the soils as well as how rapidly weathering will occur.
Therefore, temperature and precipitation is the major determining factor in soil formation.
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Which abbreviation is
a unit of energy?
°C
cal
K
W
Answer:
cal is an abb
Explanation:
meaning calories
help please
According to the data what kind of substance is gastric juice?
A.
it is a weak acid since the blue litmus paper turns red and the pH is 1.7
B.
it is a strong base since the blue litmus paper turns red and the pH is 1.7
C.
it is a strong acid since the blue litmus paper turns red and the pH is 1.7
D.
it is a weak base since the blue litmus paper turns red and the pH is 1.7
Answer:
C. it is a strong acid since the blue litmus paper turns red and the pH is 1.7Explanation:
As per table gastric juice has pH of 1.7 which is the strong acid. If you remember, 0-7 range determines acids and litmus paper confirms that by turning red.
So correct choice is C.
What is PO3 compound name?
Answer:
PHOSPHITE ION is the correct answer.
Explanation:
Hope this helped Mark BRAINLIEST!!!
Which process causes Earth's surface to warm?
the conduction of heat by air above Earth's surface
the radiation of the Sun's electromagnetic waves
the convection of warm air from the atmosphere
the reflection of electromagnetic waves off bodies of water
Answer:
its B
Explanation:
yes
Answer:
BBBBB
Explanation:
B
Write out and BALANCE the following equation: Solid Scandium metal
reacts with water to produce Scandium(III) oxide and hydrogen gas.
15 point
The deflection of earths planetary is example of
Answer:
The Coriolis effect is an apparent deflection in the paths of moving objects caused by Earth's faster speed near the equator than near the poles. In the solar system, the greatest expression of this effect occurs in planetary atmospheres. On Earth, for example, the air around us moves freely above the ground.
Explanation:
How many grams is 2.393 x 10^24 atoms of CI
70.45 g CI
140.9 ga
140.9 mole CI
70.45 mole CI
Answer:
There are 140.9 grams in 2.393*10²⁴ aotms of Cl.
Explanation:
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression. Avogadro's number applies to any substance.
Then you can apply the following rule of three: if 6.023*10²³ atoms are contained in 1 mole of the compound, 2.393*10²⁴ atoms are contained in how many moles?
[tex]amount of moles=\frac{2.393*10^{24} *1 mole}{6.023*10^{23} }[/tex]
amount of moles= 3.973
If the molar mass of Cl is 35.453 [tex]\frac{g}{mole}[/tex], then the amount of mass that contains 3.973 moles can be calculated as:
3.973 moles*35.453 [tex]\frac{g}{mole}[/tex]= 140.85 grams ≅ 140.9 grams
There are 140.9 grams in 2.393*10²⁴ aotms of Cl.
Can somebody plz help and these t or f questions correctly (only if u really know the correct ones) thx sm! :3
WILL MARK BRAINLIEST WHOEVER ANSWERS FIRST :DDDD
Using the information in the passage, rank the types of galaxies by their ability to form new stars, from most to least activity.
Answer:
The correct answer is number 2. Elliptical, Spiral, Irregular.
Explanation:
Unfortunately, you did not attach the passage. Without the passage, we do not know what its content is.
So we are going to answer this question with our own knowledge.
The types of galaxies by their ability to form new stars, from most to least activity are "Elliptical, Spiral, Irregular."
That is the way astronomers classify galaxies in scientific terms. These scientists consider that the smallest galaxies or dwarf galaxies have approximately 100 million stars. On the other hand, giant galaxies have billions or trillions of stars. That immense is our universe.
Scientists still studying the universe and the galaxies to understand the way galaxies are formed.
can someone please help I will give you the brainliest!!!
A bent molecule containing two hydrogens and one oxygen is known to exist in three phases on earthWhat is the name of this substance
Answer:
Water
Explanation:
Water is a chemical molecule structurally consisting of two hydrogen atoms and one oxygen atom to form the chemical formula, H2O. It is geometrically a bent shape due to electron position in each atom that makes it up.
Water is the only molecule on Earth that exists in the three different states of matter. This means that water can exist in a solid, liquid and gaseous form.
- Water as a SOLID is called ICE
- Water as a LIQUID is called WATER
- Water as a GAS is called VAPOUR
Mrs. Franklin decides to use her new aluminum pan to scramble eggs. She wants to determine how much heat energy will be needed to
heat her aluminum pan from 20 degrees celsius to 220 degrees celsius. She obtains the specific heat of aluminum from the reference
table. It lists the specific heat of aluminum as 0.90 N/kg*degrees celsius. The pan has a mass of 0.5 kg. She does the calculation
correctly. Which one of the following is her answer?
Your answer:
0.45 joules of heat energy
O 0.9 kilojoules of heat energy
O 90 kilojoules of heat energy
180 joules of heat energy
Answer:
90 kilojoules of heat energy
Explanation:
I don't really know why this is just the answer to it on my quiz so if someone else can explain.