Answer:
Magnesium
Explanation:
Magnesium reacts with air (oxygen) to form metal oxide.
How many moles is 415 g Fe?
Answer:
7.4312 moles
Explanation:
No of mole = mass in gram / molar mass
No of moles = 415/55.845
7.4312 moles
How many meters are in 21.5 km?
Answer:
21500m
Explanation:
Answer:
21, 500 meters
Explanation:
There are 1000 meters in a kilometer. Muliply 21.5 x 1000 to find this.
Hope it helps!
Imagine a group of hunters kills half of the rabbit population. How will it affect the other organisms?
Answer:
They will die off too
Explanation:
The animals that feed off the rabbits will start to die off from starvation, and so will the animals tho eat off of those. The entire food chain above the rabbits will start to decrease, while the plants and animals that the rabbits eat will increase in population due to less predators.
A CANDLE WILL STAY LIT INSIDE THE SPACE SHUTTLE WHEN IT IS ON THE LAUNCH PAD, BUT NOT WHEN IT IS IN ORBIT. WHY?
Answer:
because there is no oxygen in space for it to burn
because all fire need oxygen to burn
Explanation:
what is the electrical charge of an atom
A sample of carbon monoxide gas occupies 224 L at STP. This sample contains how many grams of oxygen atoms?
Answer:
16 g.
Explanation:
The formula for carbon monoxide is CO.
So there is one atom of oxygen in the formula, therefore there is one mole of oxygen gas ( one mole occupies 22,4 L at STP)
One mole of oxygen atoms = atomic mass of oxygen in grams = 16 grams.
H2O2 → H2O + O2
This is showing the reaction that we used in elephant’s toothpaste. Write and balance this equation on your own sheet of paper. If 24.53 g of hydrogen peroxide decompose, how many grams of water are produced.
Answer:
75.47
Explanation:
AS WE CANT WEIGHT AIR THE ANSWER IS CORRECT
There are some climates in which there are no living things. true or false
Answer:
True
Explanation:
There are some climates in which there are no living things. The average of the weather is the climate.
What is climate ?Climate is a region's averaged long-term weather pattern over a period of time, usually 30 years. More precisely, it is the average and variation of climatic variables over a period of time that can range from a few months to many millions of years.
Every element of our life is impacted by the climate, including our food supplies, transportation systems, clothing choices, and vacation destinations. It significantly affects our future, our health, and our means of subsistence. Climate is the long-term trend of the weather in any given location.
As an illustration, you can anticipate snow in the Northeast in January or hot and muggy weather in the Southeast in July. Climate is this. Extreme values, such as record-breaking high temperatures or heavy rainfall, are also part of the climatic record.
Thus, there are some climates in which there are no living things.
To learn more about climate follow the link;
https://brainly.com/question/10440860
#SPJ2
How many atoms are found in one molecule of water?
Answer: To calculate the number of molecules and atoms in a water drop, you need to know the chemical formula of water. There are two atoms of hydrogen and one atom of oxygen in each water molecule, making the formula H 2 O. So, each molecule of water contains 3 atoms. Molar Mass of Water
Explanation: Hope this helps!
From: Kenma! ^^
Answer:
the answer is 3 atomsExplanation:
Consider the following reaction:
A + B C + D + heat
If this reaction is first allowed to reach equilibrium, the concentration of substance D will be further increased by then (choose one best answer)
(A) removing some A.
(B) removing some B.
(C) removing some C.
(D) heating the reaction
(E) none of the above
If 20 hits equal 1 web 1 futz equal 2 geese 10 webs equal to 1 futz How many gits are equal to 5gews?
Answer:
500 hits
Explanation:
If 20 hits equal 1 web 1 futz equal 2 geese 10 webs equal to 1 futz How many hits are equal to 5 geese?
Solution:
Given that:
20 hits = 1 web, 1 futz = 2 geese; 10 webs = 1 futz
10 webs = 1 futz; hence:
1 web = 1 web * 1 futz / 10 webs = 0.1 futz
1 web = 0.1 futz
1 futz = 2 geese; hence:
0.1 futz = 0.1 futz * 2 geese / 1 futz
0.1 futz = 0.2 geese
Therefore, 1 web = 0.1 futz = 0.2 geese
1 web = 0.2 geese
This means that 20 hits = 1 web = 0.2 geese
20 hits = 0.2 geese
5 geese = 5 geese * 20 hits / 0.2 geese
5 geese = 500 hits
When she placed her hand on the side of the container, it felt really cold, but it didn't feel that way before. The temperature had dropped by about 30 degrees Celsius. The substance was now grey and crystallin in structure.
Was this a chemical reaction?
Answer the question (in a complete sentence) Provide evidence to support your claim and describe (reasoning/justify) how the evidence supports the claim.
Answer:
this is a physical reaction
Explanation:
Answer:
this is a physical reaction
Explanation:
What kind of scientist would study the the force of a car running into a wall
A. A Chemist
B. A physicist
C. A Botanist
D. A Biologist
Answer:
B. A Physicist
Explanation:
pleaseeeeeeeeeeeeeeeeeeeeeeee helppppppppppp
Approximately how many grams of KBr will dissolve in 100g of water at 50C?
60g
70g
80g
90g
Answer:
the answer would be to your problem here is 90g
Explanation:
When solid copper reacts with aqueous silver nitrate, the products are copper (II) nitrate and silver metal. How
many grams of silver would be produced from 83.94 grams of silver nitrate?
Answer:
This chemical equation means: One mole of solid copper plus two moles of aqueous silver nitrate produce one mole of copper(II) nitrate plus two moles of solid silver. This is a single replacement reaction in which the metal copper replaces the metal silver.
Explanation:
Hope this help
PLEASE PLEASE HELP ITS PAST DUE AND IM CLUELESS ILL GIVE BRAINLIEST TO THE FIRST CORRECT ANSWER
Which of the following would be the evidence of a physical change?
a. change in state of matter
b. precipitate was formed
c. unexpected change in odor
d. formation of bubbles
Answer:
[tex]\boxed {\boxed {\sf A. \ Change \ in \ state \ of \ matter}}[/tex]
Explanation:
A physical change occurs when only the physical properties change. They are generally reversible and no new substances are formed.
However, in a chemical change, the chemical structures and properties change, plus new substances are formed.
Let's analyze each answer choice.
1. Change in state of matter
The state of matter is a physical property, so this is a physical change.
2. Precipitate was formed
A precipitate is a solid formed in a liquid solution. This is a new substance and a chemical change.
3. Unexpected change in odor.
A change in odor is a sign of chemical change.
4. Formation of bubbles
Bubbles signify the formation of gas or a new substance.
So, the best answer choice is A. change in state of matter
Question:
Which of the following would be the evidence of a physical change?
a. change in state of matter
b. precipitate was formed
c. unexpected change in odor
d. formation of bubbles
Answer:
A. Change in state of matter!
Explanation:
How to know it evidence of physical change!
EXPECTED color change.Change in SIZE or SHAPE.Change in state of matter.Reversible.No NEW substance formed!An object with a
mass acclerates slower.
What is the probability of this male and female having Xhy children?
0%
25%
50%
75%
100%
Answer:
75π{¢ because of the snajabvahajhakavsnsbdjbdbfnf
Explanation:
bznsvnsns
Abel was running a fever of 107 degrees Fahrenheit, what was her temperature in degrees
Celsius?
Explanation:
we know the formula to convert farenheit to Celsius
=(F-32)(5/9)
=(107-32)(5/9)
(5/9)=375/9= 41.6 degrees Celsius
Part 1)
One reaction that produces hydrogen gas can be represented by the unbalanced chemical equation- Mg(s) + HCl(aq) −→ MgCl2(aq) + H2(g).
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Answer in units of g.
Part 2) What mass of MgCl2 is produced? Answer in units of g.
Part 3) What mass of H2 is produced? Answer in units of g.
Answer:
Part 1: 229.95g
Part 2: 598.5g
Part 3: 12.6g
Explanation:
Note: I learned this last week. Answer not sure.
Pls tell me if i got it right or wrong.
Mg + HCl - > MgCl2 + H2
First, balance the equation.
There is only 1 H and 1 Cl at the left side. BUT there are 2 Cl and 2 H at the right side. So you can add a 2 in front of HCl to balance it.
Mg + 2HCl - > MgCl2 + H2
Formula 1: (n= m/mr)
n = moles, m= mass, mr = molecular mass
Formula 2: (n= v/24)
v = volume
Part 1
What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?
Ratio of
(look at the number in front of each)
2HCl : Mg
2 : 1
(3.15 x 2) : 3.15 moles
6.3 moles : 3.15 moles
So 2HCl has 6. 3 moles
Now use formula 1 (n = m/mr)
Calculate molecular mass of HCl
Check your periodic table
mr of HCl =(1 + 35.5) = 36.5
6.3 = m/36.5
m = 229. 95grams
Part 2
What mass of MgCl2 is produced? Answer in units of g.
Ratio of
2HCl : MgCl2
(1 +35.5) : (24+35.5x2)
36.5: 95
229.95g :?
229.95g : 598.5g
m = 598.5g
Part 3
What mass of H2 is produced? Answer in units of g.
2HCl : H2
36.5 : 2
229.95g :?
229.95g : 12.6g
m = 12.6g
How would an apple, potato, and onion all taste the same?
A) plugging your nose
B) Chewing on mint gum in intervals
C) eating them at the same time
Answer:
A
Explanation:
Says it on the side of meh screen :P
(Ez question in lol)
write a summary about the moon phases
Answer:
A lunar phase is simply the shape of the sunlit part of the Moon, as seen from Earth. Phases are so strikingly obvious that we almost take them for granted. Moreover, they can be observed easily throughout the month from the backyard or via a simple glance out the window.
The Moon's shape changes for the following reasons:
The Moon orbits Earth.
Both Earth and the Moon orbit the Sun.
The Moon's orbit is the same length as the time it spins on its axis (about 28 Earth days), which means that we see the same part of the lunar surface all month.
The Sun illuminates both Earth and the Moon.
Get to Know the Lunar Phases
There are eight phases of the Moon to track each month.
New Moon: During New Moon, the side of the Moon facing us is not illuminated by the Sun. At this time, the Moon is not up at night, but it is up during the day. We just can't see it. Solar eclipses can occur during the New Moon, depending on how the Sun, Earth, and Moon line up in their orbits.
Waxing Crescent: As the Moon waxes (grows) into its crescent phase, it begins to show up low in the sky right after sunset. Look for a silvery-looking crescent. The side facing the sunset direction will be lit up.
First Quarter: Seven days after New Moon, the Moon is in first quarter. Only half of it is visible for the first half of the evening, and then it sets.
Waxing Gibbous: After First Quarter, the Moon appears to grow into a gibbous shape. Most of it is visible, except for a dark sliver that shrinks over the next seven nights. Look for the Moon at this time during the afternoon, too.
Full Moon: During the Full Moon, the Sun lights up the entire surface of the Moon that faces Earth. It rises just as the Sun sets and disappears beneath the western horizon when the Sun rises the next morning. This is the brightest phase of the Moon and it washes out the nearby part of the sky, making it difficult to see stars and faint objects such as nebulae.
Ever hear of a Super Moon? That's a Full Moon that happens when the Moon is closest in its orbit to Earth. The press likes to make a big deal about this, but it's really a very natural thing: On occasion, the Moon's orbit brings it closer to Earth. Not every month has a Super Moon. Despite the hype about Super Moons in the media, it's difficult for the average observer to notice one, because the Moon might appear only slightly larger in the sky than normal. In fact, the well-known astronomer Neil deGrasse Tyson pointed out that the difference between a regular Full Moon and a Super Moon is analogous to the difference between a 16-inch pizza and a 16.1-inch pizza.
Lunar eclipses occur only at Full Moons because the Moon is passing directly between Earth and the Sun in its orbit. Due to other perturbations in its orbit, not every Full Moon results in an eclipse.
The other Full Moon variation that often grabs media attention is a "Blue Moon." That's the name given to the second Full Moon that occurs in the same month. These don't happen all the time, and the Moon certainly doesn't appear blue. Full Moons also have colloquial names based on folklore. It's worth reading about some of these names; they tell fascinating stories about early cultures.
Waning Gibbous: After the glorious appearance of Full Moon, the lunar shape starts to wane, meaning it gets smaller. It's visible later at night and into the early morning, and we see a steadily shrinking shape of the lunar surface that's being lit up. The side that is lit up is facing toward the Sun, in this case, the sunrise direction. During this phase, look for the Moon during the day—it should be in the sky in the morning.
Last Quarter: At Last Quarter, we see exactly half the sunlit surface of the Moon. It can be seen in the early morning and daytime sky.
Waning Crescent: The last phase of the Moon before returning to New Moon is called Waning Crescent, and it is exactly what it says: a steadily-shrinking crescent phase. We can see only a small sliver from Earth. It's visible in the early morning, and by the end of the 28-day lunar cycle, it has vanished almost entirely. That brings us back to New Moon to start the new cycle.
Citation for work-Petersen, Carolyn Collins. "The Once-Mysterious Phases of the Moon Explained." ThoughtCo, Aug. 27, 2020, thoughtco.com/what-are-moon-phases-3883581.
Explanation:
Something shorter-The different shapes of the lit portion of the Moon that can be seen from Earth are known as phases of the Moon. Each phase repeats itself every 29.5 days. The same half of the Moon always faces the Earth, because of tidal locking. So the phases will always occur over the same half of the Moon's surface.
List the primary consumers in the food web please help
Answer:
Giraffe, rhinoceros, grasshopper, mouse, and deer
Explanation:
Primary consumers eat producers (plants). Therefore, all the animals that eat the plants are primary consumers.
Answer:
cricket, mouse, snake, bird
Explanation:
Lithium hydroxide reacts with hydrobromic acid(HBr) to produce lithium bromide and water. If you
start with 3.00 moles of lithium hydroxide, how many moles of lithium bromide will be produced?
Answer:
3.00 moles of Lithium bromide will be produced
Explanation:
The reaction that takes place is:
LiOH + HBr → LiBr + H₂OBy looking at the reaction equation, we can see that the reaction of 1 mol of lithium hydroxide (LiOH) produces 1 mol of lithium bromide (LiBr). Thus, 3.00 moles of LiOH would conversely produce 3.00 moles of LiBr.
what color should i paint my nails. btw ima do a cheetah design on top so what should be the base color??
Answer:
Tan :3 or maybe a yellow O,O
Explanation:
Answer:
pink and purple, like in fade
Explanation:
I think it'd look cute
5
Use the equation Moles = Mass/Mołar Mass (Mr) to calculate the following: To make 3 moles of
Sodium (Na), how much mass do I need to weigh out?
A: 699g
B: 6.9g
C: 69g
D: 96g
Answer:
c
Explanation:
Molar mass of Na=23g/mol
amount of mole(n)=3
mass=?
therefore,n=m/M
3mol=m/23g/mol
m=23g/mol ×3mol
m=69g.
5.25 x 10^32 atoms of K to grams
Answer:
3.40x10¹⁰ grams
Explanation:
First we convert 5.25x10³² atoms to moles, using Avogadro's number:
5.25x10³² atoms ÷ 6.023x10²³ atoms/mol = 88.72x10⁸ mol
Then we convert K moles to grams, using its molar mass:
88.72x10⁸ mol * 39 g/mol = 3.40x10¹⁰ g
So 5.25x10³² atoms of K would weigh 3.40x10¹⁰ grams.
How many molecules are in 0.89 moles of CO2
if you need some points and are good at science help!
Answer:
region 2 and region 3
Explanation:
you can tell by the color of the land my friends^^
Answer:
2, 3 They are closest to the equator, and the equator marks to hottest places on earth.
Explanation:
I hope this helps you.
If you have 7.3g of solid calcium and it takes 62.3J of heat to melt it at 842°C. what would the heat of fusion for calcium?
Answer:
fttttggttfvvgfrr ccsfgt chg chu rdh fig ffhfr
Answer:
To solve this problem, you'll need the formula that relates heat energy to mass and heat of fusion:
q = m·ΔHf
where
q = heat energy
m = mass
ΔHf = heat of fusion
Explanation:
62.3J ÷ 7.3g = ΔHf
8.53 J/g = ΔHf
4.18 cal/g = ΔHf