Explanation:
13. 8,448 = 8,450 (round up, 8 more than 5)
14. 89.32 = 89.3 (round down, 2 less than 5, 0 is not needed)
15. 0.05678 = 0.0568 (round up, 8 more than 5, 0 in front are not significant)
24. a. Suppose different parts of a sample material
have different compositions. What can you
conclude about the material?
(1-2)
Answer:
One can conclude that the metal is an alloy.
Explanation:
An alloy is a combination of metal that has two or more elements. Different metals are usually combined to give it more strength or make it more resistant to corrosion.
Cheers!
Consider the electron configuration 1s2 2s2 2p6 3s2 3p6 3d8 4s2? Which of the following statements is false?
A. There are 16 electrons on the third energy level.
B. This atom has 2 valence electrons.
C. There are 4 energy levels in the atom.
D. The next electron to be added will be in sublevel 4p.
Determined from the sum of potential and kinetic energy in a substance
2 points
Heat
Potential Energy
Thermal Energy
Total Internal Energy
Kinetic energy
Answer:
heat.
hope i helps
4. How many grams would 2.5 moles of magnesium
(Mg) weigh?
Answer:u would have 30 grams in it
Explanation:cause u have 12 grams in each mole
An igneous rock has a coarse texture and is dark in color. How else can this rock be accurately described?
small crystals
cooled quickly
produced from magma
formed at Earth’s surface
Answer:
B- cooled quickly
Explanation:
credit to the person above me :)
An igneous rock has a coarse texture and is dark in color. The rock can be accurately described as cooled quickly.
What are rock?Rock are defined as a natural substance made up of crystalline crystals of various minerals fused together to form a solid mass.
It is also defined as any naturally occurring mineraloid substance or solid bulk.
There are basically three types of rock.
Igneous rock - It is defined as rocks arise from magma, a molten mixture of rock-forming minerals and frequently volatiles such as gases and steam. Metamorphic rock - It is defined as those created by modifications in preexisting rocks caused by high temperature, pressure, and chemically active fluids.Sedimentary rock - It is defined as a materials deposited and lithified near the Earth's surface by rushing water, wind, ice, or living creatures.Thus, an igneous rock has a coarse texture and is dark in color. The rock can be accurately described as cooled quickly.
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Find the volume of a cereal box that has the dimensions of 35.2 cm x 220 cm x 6.0 cm
Answer:
Volume = 35.2×220×6.0 = 46464 centimeters³
Explanation:
Results that would support your hypothesis? Please help me, This is over due.
My hypothesis is “If coffee makes you shorter than maybe you should lower your coffee intake because it could affect your height”?
Answer:
doesn’t make sense coffee couldn’t make you shorter , yes it might stop you from growing but it doesn’t shrink your body.
Explanation:
Because coffee is made out if coffee beans and has caffeine but theres just no possible way that’s even a question.
An aspirin tablet has 300mg of active ingredient. How many grams does that
equal?
Answer:
0.3 grams
Explanation:
you need to convert mg to m, and in doing so, multiply your 300mg by 1000
Hope this helps
Two pieces of the same metal or placed on the table with the piece of metal have the same density mass and texture which characteristic must be the only difference between the two samples
A-they contain a different amount of matter per unit volume
B-they have different dimensions
C-they are made up of a different type of matter
D-they have different boiling points
Answer:
B-they have different dimensions
Explanation:
It was explicitly stated in the question that the both samples are exactly pieces of the same metal. If that is so, pieces of the same metal must have the same density, contain the same quantity of matter, have the same boiling point and have the same amount of matter per unit volume.
However, the two pieces of metal may have different dimensions.
True or False.... Any person living outside of the 50 States or in Hawaii automatcially becomes an American citizen at Birth? True or False
Help me please thank you
Answer:
When nitric acid combine with sodium hydroxide the salt formed is called sodium nitrate. option B
Explanation:
It is the strong acid strong base reaction. When acid and base react with each other salt and water are formed.
In given reaction nitric acid combine with sodium hydroxide base and form sodium nitrate salt and water.
Chemical equation:
HNO₃(aq) + NaOH(aq) → NaNO₃(aq) + H₂O(l)
Ionic equation:
H⁺NO₃⁻(aq) + Na⁺OH⁻(aq) → Na⁺NO₃⁻(aq) + H₂O(l)
Net ionic equation:
H⁺(aq) + OH⁻(aq) → H₂O(l)
The Na⁺(aq) and NO₃⁻(aq) are spectator ions that's why these are not written in net ionic equation. The water can not be splitted into ions because it is present in liquid form.
Spectator ions:
These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.
his image shows the rock cycle.Which event most likely occurs at point V?
An atom of titanium has 22 protons and 26 neutrons. If the atoms loses one electron, what will be the charge on the ion that forms?
A. +1
B. -1
C. +21
D. -21
An atom of titanium has 22 protons and 26 neutrons. If the atoms loses one electron, then the charge on the ion that forms is +1. Thus option A is correct.
What are protons?Protons are defined as a positively charged particles which are present in the nucleus of an atom.
Number of protons in an element nucleus is called atomic number.
Neutrons are defined as a neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen.
When an atom loses electrons it gain positive charge and become cation. When an atom gain electrons it gain negative ions and become anion.
Thus, an atom of titanium has 22 protons and 26 neutrons. If the atoms loses one electron, then the charge on the ion that forms is +1. Thus option A is correct.
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explain the parts of a cell.
Answer:
Nucleus
The nucleus can be thought of as the cell’s headquarters. There is normally one nucleus per cell, but this is not always the case, skeletal muscle cells, for instance, have two. The nucleus contains the majority of the cell’s DNA (a small amount is housed in the mitochondria, see below). The nucleus sends out messages to tell the cell to grow, divide, or die.
Plasma membrane
To ensure each cell remains separate from its neighbor, it is enveloped in a special membrane known as the plasma membrane. This membrane is predominantly made of phospholipids, which prevent water-based substances from entering the cell. The plasma membrane contains a range of receptors, which carry out a number of tasks, including being:
Gatekeepers: Some receptors allow certain molecules through and stop others.
Markers: These receptors act as name badges, informing the immune system that they are part of the organism and not a foreign invader.
Communicators: Some receptors help the cell communicate with other cells and the environment.
Fasteners: Some receptors help bind the cell to its neighbors.
Cytoplasm
The cytoplasm is the interior of the cell that surrounds the nucleus and is around 80 percent water; it includes the organelles and a jelly-like fluid called the cytosol. Many of the important reactions that take place in the cell occur in the cytoplasm.
Lysosomes and peroxisomes
Both lysosomes and peroxisomes are essentially bags of enzymes. Lysosomes contain enzymes that break down large molecules, including old parts of the cells and foreign material. Peroxisomes contain enzymes that destroy toxic materials, including peroxide.
Cytoskeleton
The cytoskeleton can be considered the scaffolding of the cell. It helps it maintain the correct shape. However, unlike regular scaffolding, the cytoskeleton is flexible; it plays a role in cell division and cell motility — the ability of some cells to move, such as sperm cells, for instance.
The cytoskeleton also helps in cell signaling through its involvement in the uptake of material from outside the cell (endocytosis) and is involved in moving materials around within the cell.
Endoplasmic reticulum
The endoplasmic reticulum (ER) processes molecules within the cell and helps transport them to their final destinations. In particular, it synthesizes, folds, modifies, and transports proteins.
The ER is made up of elongated sacs, called cisternae, held together by the cytoskeleton. There are two types: rough ER and smooth ER.
Golgi apparatus
Once molecules have been processed by the ER, they travel to the Golgi apparatus. The Golgi apparatus is sometimes considered the post office of the cell, where items are packaged and labeled. Once materials leave, they may be used within the cell or taken outside of the cell for use elsewhere.
Mitochondria
Often referred to as the powerhouse of the cell, mitochondria help turn energy from the food that we eat into energy that the cell can use — adenosine triphosphate (ATP). However, mitochondria have a number of other jobs, including calcium storage and a role in cell death (apoptosis).
Ribosomes
In the nucleus, DNA is transcribed into RNA (ribonucleic acid), a molecule similar to DNA, which carries the same message. Ribosomes read the RNA and translate it into protein by sticking together amino acids in the order defined by the RNA.
what's the chemistry?
Answer:
Chemistry is another word for science just higher level.the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
Explanation:
Answer:
Chemistry is a branch of science.
Convert 90.23 kPa into atm
Answer:
The answer is
0.89 atmExplanation:
To convert from kPa to atm we use the conversion
101.325 kPa = 1 atm
If
101.325 kPa = 1 atm
Then
90.23 kPa will be
[tex] \frac{90.23}{101.325} \\ =0.89050086... [/tex]
We have the final answer as
0.89 atmHope this helps you
How do you write the electron notation and orbital fill notation for calcium?
The energy of the motion of the particles in the matter
2 points
Heat
Potential Energy
Thermal Energy
Total Internal Energy
Kinetic energy
Fe2O3 + _H2SO4 → _Fe2(SO4)3 + __H2O what are the coefficients
Answer:
Fe₂O₃ + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂O
Explanation:
Step 1: Write out unbalanced reaction
Fe₂O₃ + H₂SO₄ → Fe₂(SO₄)₃ + H₂O
Step 2: Balance
We need the same number of SO₄²⁻ on each side
Fe₂O₃ + 3H₂SO₄ → Fe₂(SO₄)₃ + H₂O
Now we need the same amount of H⁺ on each side
Fe₂O₃ + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂O
When nitrogen is returned to the soil when dead plants decompose the interaction is between
Answer:
When nitrogen is returned to the soil when dead plants decompose, the interaction is between which two spheres?
Geosphere and biosphe
Explanation:
Which phrase describes non-foliated rocks? only one!
have grains in parallel layers
include quartzite and marble
tend to split along their bands
form from crystallized magma
Answer:
include quartzite and marble
Explanation:
non-foliated rocks are
1. metamorphic rocks
2. they are formed in the surrounding of igneous rocks
3. The environmental condition of formation of non-foliated rocks are that temperature is very high
4. pressure is very low but equal from all direction on igneous rocks
5. The constituent material crystalizes to form large rocks in which atoms are tightly and closely packed. Due to this density of these rocks are also higher.
Example of such rocks are
Quartzite : Its constituent material are mineral quartz and metamorphosed sandstone
Marble : its constituent material are mineral calcite; metamorphosed limestone
Hence, include quartzite and marble is the correct choice.
Answer:
include quartzite and marble
Explanation:
which of these is a mixture? a.water b.sugar c.carbon dioxide d.popcorn and salt
Popcorn and salt as the mixtures are substances which are formed by mixing other substances
Carbon - Mass: 20 / Atomic #: 6
How many neutrons are found ?
Answer:
its base of the number chlorine -37
Explanation:
say hi to everyone
Answer:
Hi.
Explanation:
I like turtes.
Answer:
Hi everyone
Explanation:
While Karen was cooking dinner, she noticed that several ingredients went through chemical and physical changes. Which cooking process is an example of a physical change?
A. Boiling soup
B. Frying eggs
C. Baking cookies
D. Toasting bread
Answer: frying egg
Explanation:
Please Help! Please do not give me a random, gibberish answer or I will report you and give you a low rating therefore dropping your popularity. Also, if you don't know the answer you can put your guess in the comments. I will give a Brainliest and 50 points!
How much Na3PO4 can dissolve in 200 g of water at 40°C?
The ability for a substance to dissolve is affected by both temperature and pressure.
Temperature
As the temperature increases, the solubility of a solid solute also increases, as the solvent can hold more of the solute particles.
However, as the temperature increases for a gas, the solubility decreases. As the temperature increases, the gas molecules have more energy and are able to escape the solvent, causing the solubility to decrease.
Pressure
As the pressure increases on a solution containing a gaseous solute, the solubility of the gas increases. At higher pressures, there are more gas molecules above the solution, which are able to enter and dissolve into the solution.
Graph representing how temperature affects the solubility of various solids. At 40°C, Glucose has a solubility of ~130 g in 100 g of water while NaCl has a solubility of ~38 g in 100 g of water.
Answer:
The answer is 50 g
Explanation:
Hope that helps!
The answer to your question is 50 g
How many atoms in 19.6 grams of sodium? Full number please not the expression of ### times ###^##
Answer:
Number of atoms = 5.1345 x 10²³
Explanation:
Given:
Mass of sodium = 19.6
Find:
Number of atoms
Computation:
We know that atomic mass of sodium is 22.98
So,
Number of atoms = [Mass of sodium/atomic mass of sodium]Avogadro's number
Number of atoms = [19.6 / 22.98]6.02 x 10²³
Number of atoms = 5.1345 x 10²³
Consider the data set displayed to the shows the results of change in temperature on the volume of gas. A ____would be the best type of graph do use to display this data.
A)line graph
B)scatter plot
C)bar graph
Answer:
line graph
Explanation:
i just did the instruction :)
Answer:
line graph
Explanation:
edge chemistry
What is the density in g/cm3 of a rectangular prism whose sides measure 10cm x 1cm x 2 cm and has a mass of 240g?
Answer:
12 g/cm³
Explanation:
From the question given above, the following data were obtained:
Dimension = 10 cm × 1 cm × 2 cm
Mass = 240 g
Density =.?
Next, we shall determine the volume of the rectangular prism. This can be obtained as follow:
Volume = 10 cm × 1 cm × 2 cm
Volume = 20 cm³
Finally, we shall determine the density of the rectangular prism as follow:
Mass = 240 g
Volume = 20 cm³
Density =.?
Density = mass /volume
Density = 240 /20
Density = 12 g/cm³
Therefore, the volume of the rectangular prism is 12 g/cm³.
Direction: Read each statement and choose the best answer. Write the
answer on a separat sheet of paper.
1. Which of the following are organs of the respiratory system?
a. nasal cavity, pharynx, larynx, lungs
b. nasal cavity, pharynx, larynx, stomach
c. nasal cavity, trachea, brain, heart, lungs
d. nasal cavity, trachea, veins,intestines, lungs
Answer:
A. Nasal cavity, pharynx, larynx, lungs
Explanation:
The nasal cavity, is the nose, the pharynx is the lining between nose and mouth, larynx is the passage that goes down to the lungs
