Answer:
iron, magnesium, and calcium but low in potassium and sodium.
Which of the following could describe the velocity of a rocket?
A)8,000 m/s2 south
B)8,000 m/s north
C)8,000 m2/s2 east
D)8,000 m/s
Can someone please help me♀️
Answer:
D) 8,000 m/s
Explanation:
What is solar energy?
Answer:
Solar energy is energy from the sun converting it to thermal or electric energy. It is renewable resource meaning it will never die out. It is also called radiant energy.
Explanation:
This distance-time graph represents a journey made by Jo (image above)
At what speed was Jo walking for the first 30 minutes?
(in km/h)
Answer:
1 km per 10 minutes
Explanation:
Based on the map that's my conclusion
Answer:
It's actually 6 km/h and for b) it's 10 minutes
Explanation:
At 30 minutes the distance was 3km, so you multiply it by 2 to get 6km.
And then it's 10 minutes for part B)
4. How do chemical processes result in thermal energy being released or absorbed? explain
Answer:
there's no answer :)
Explanation:
When chemical bonds are formed, heat is released, and when chemical bonds are broken, heat is absorbed
A state of matter in which material has no definite shape but has a definite volume
Answer:
Liquid
Have a goodnight/day and stay safe
The best example of heat transfer by convection is when
A. sunlight warms soil.
B. a ceiling fan blows air.
C. flames heat up a pan.
D. heat rises in a chimney.
HELP HELPPPPPPPPPPP
why don't birds get electrocuted when they stand on the light post wire
Answer:
Because they have scaled feet
Answer:
Because they have scaled feet that prevents them from getting electrocuted
what can be said about the properties of a compound?
Answer:
A compound has unique properties that are distinct from the properties of its elemental constituents. One familiar chemical compound is water, a liquid that is nonflammable and does not support combustion. It is composed of two elements: hydrogen, an extremely flammable gas, and oxygen, a gas that supports combustion.
Explanation:
Which mineral is hard enough to scratch calcite? *
1 talc
2 sulfur
3 halite
4 quartz
Answer:
Should be number 4, quartz.
Explanation:
Quartz is rougher than calcite, therefore it's able to scratch it.
its a lot cheaper and wanted to know if you think it would be just as good?
Do you think that one mole of the difference substances have the same amount?
Answer:
yes, the amount doesn’t change, only the mass changes
Information to make scientifically supported judgments by describing the Importance of Ernest Rutherford's gold-foil experiment.
Answer:
Rutherford's experiment led to the rejection of JJ Thomson's raisin bundle model. In the experiment, a thin gold strip was bombarded with alpha particles. According to Thomson's atomic model, all alpha particles should have passed through the strip, but in this experiment it was found that some of the particles were reflected backwards. Based on his experiment, Rutherford published the result that almost the entire mass of an atom is concentrated in its nucleus. Rutherford's atomic model was later improved by Niels Bohr, who published the Bohr model.
Find the density of this unknown material Mass: 45 g
Answer:
Does it question provide the volume? To find density you need to divide the mass by the volume (d=m/v).
Explanation:
Below is a diagram of an atom. What is the atomic number of this atom?
Answer:
14
Explanation:
there are 14 electrons in the shells
stars have a larger gravitational force then planets
Answer: Is this a true or false question? if it is I believe the answer is True
Explanation:
This is a true statement. Objects with more mass have a larger gravitational force, and stars have many, many times more mass than planets.
Which equation Best obeys the law of conservation of mass?
a) N2 + 3H2 —> 2NH3
b) H2 + O2 —> 2H20
c) 2Ag20 —> Ag2 + O2
d) N2 + H2 —> NH3
Answer:
N₂ + 3H₂ → 2NH₃
Explanation:
To obey the law of conservation of mass, the number of atoms on both sides of the expression, must be the same.
According to the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed but changed from one form to another".
To express this in chemical reaction, the number of atoms must be the same in going from reactants to products.
N₂ + 3H₂ → 2NH₃
We have 2 atoms of Nitrogen on both sides of the expression.
Also, we have 6 atoms of hydrogen on both sides.
Can someone help me with this question?
just need points lol
Please help!
What are the exchange pools for Carbon?
Answer:
Carbon pool
Earth's carbon pools.
The ocean (~37,000 GtC).
Terrestrial ecosystems (~3,000 GtC).
Earth's crust (sedimentary rocks ~75,000,000 GtC).
The atmosphere (~830 GtC).
Dissolve one teaspoon of sugar for each cup.Stir.What do you observe?Is there any difference?
which planet has a windstorm that has lasted 300 years?
Answer:
planet Jupiter
Explanation:
The giant storm has persisted in Jupiter's atmosphere ever since astronomers were first able to observe it after the invention of the telescope, more than 300 years ago.
Can more than one type of reaction occur at the same time?
Answer: yes, it depends on the substance though
Explanation:
can someone help me with this
Answer:
phosphorous- 5
calcium- 2
nitrogen- 3 or 5
iron- 8 (transition metals use subshells as valence electrons)
argon- 8
potassium- 1
helium- 2
magnesium- 2
sulfur- 6
lithium- 1
iodine- 7
oxygen- 6
barium- 2
aluminum- 3
hydrogen- 1
xenon- 8
copper- 1
Source: my own chemistry notes
This is urgent please help...
Write a balanced equation for this reaction.
___ C2H2 + ___ O2 ---> ___ CO2 + ___ H2O
Please help
Answer:
2C2H2+5O2--->4CO2+2H2O
Explanation:
.....................
PLease answer the thing and explain why is that...
Answer: i think its d
Explanation:
3. Starch is classified as a
A. disaccharide.
B. polypeptide
C. nucleotide.
D. polysaccharide.
Answer:
D
Explanation:
Polysaccharides are long chains of monosaccharides linked by glycosidic bonds. Three important polysaccharides, starch, glycogen, and cellulose, are composed of glucose. Starch and glycogen serve as short-term energy stores in plants and animals, respectively. The glucose monomers are linked by α glycosidic bonds.
Starch is classified as a option D. polysaccharide. Polysaccharides are complex carbohydrates composed of long chains of monosaccharide units, which are simple sugar molecules.
What is StarchStarch is a type of carbohydrate that is made up of many smaller sugar molecules.
It is made up of many smaller sugar units called glucose molecules that are attached together. Starch is a way for plants to store energy. It can be found in seeds, tubers, and other parts of plants. It is an important part of what we eat, especially in foods like potatoes, rice, and grains.
Hence option d is correct.
Read more about Starch here:
https://brainly.com/question/1237142
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How many atoms are in 1.5 moles of iron?
Answer:
One mole of anything is 6.022×1023 everythings, including atoms. Multiply the moles Fe by 6.022×1023 atoms/mol. 3.77mol Fe ×6.022×1023atoms Fe1mol Fe =2.27×1024 atoms Fe rounded to three significant figures.
The number of atoms present is 1.5 moles of iron is 9.0 ×10²³ atoms
From the question,
We are to determine the number of atoms present in 1.5 moles of iron.
From the formula,
[tex]Number\ of\ moles = \frac{Number\ of\ atoms}{Avogadro's\ constant}[/tex]
Then, we can write that
Number of atoms = Number of moles × Avogadro's constant
∴ Number of atoms of iron present = 1.5 × 6.022×10²³
Number of atoms of iron present = 9.033 ×10²³ atoms
Number of atoms of iron present ≅ 9.0 ×10²³ atoms
Hence, the number of atoms present is 1.5 moles of iron is 9.0 ×10²³ atoms
Learn more here: https://brainly.com/question/22911047
What do solar panels convert radiant energy into?
Answer:
*Solar cells or panels convert radiant energy from the sun into electricity.
Explanation:
0.236 gm of Metal X reacts with O2 forming 0.436 of the compound X2O3 what is the gram atomic mass of x?
MgCl2+ Na2O---> NaCl+ Mgo
Balance the equation
Answer:
MgCl2 + Na2O ---> 2NaCl + MgO
