Answer:
copper
Explanation:
i think it's copper because it's cheep and It exists in abundance
pLeeease help im so tired and i need to SLEEP. Answer the 1s you know
1. How does the mechanical energy of a ball that is starting to fall compare to its total energy just before it hits the floor?
2. When you stand in sunlight, what form of energy is emitted by the sun?
3. An eye doctor wants to design reading glasses that also function as sunglasses. Should the eye doctor use a reflective-transparent material or a reflective-opaque material for the lenses? Support your claim.
30 POINTS HELPP PLEASE
1: selective breeding
2:traits
3: crop species
4: domestic
5: diverse
6: artificial
7: uniform
in your opinion if the answer is correct please like n mark MI s brain list
The the balanced equations to: solutions of lithium sulfate and potassium phosphate are mixed together to make lithium phosphate and potassium sulfate
Answer:
[tex]3Li_2SO_4+2K_3PO_4\rightarrow 2Li_3PO_4+3K_2SO_4[/tex]
Explanation:
Hello!
In this case, when lithium sulfate and potassium phosphate solutions are mixed to yield lithium phosphate and potassium sulfate, the following chemical equation comes up:
[tex]Li_2SO_4+K_3PO_4\rightarrow Li_3PO_4+K_2SO_4[/tex]
However, as atoms are not balanced we apply the inspection method to obtain:
[tex]3Li_2SO_4+2K_3PO_4\rightarrow 2Li_3PO_4+3K_2SO_4[/tex]
Best regards!
Question (2) If your car
gets 27.8 miles to the gallon, how many liters of gasoline are necessary to travel 112 km?
This problem can be solved in short steps or in one longer step. In either case, please show your work.
Use the following conversion factors:
1 mi = 1.609 km
1 gal = 3.785 L
Answer:
9.48 L.
Explanation:
Hello!
In this case, as the problem mentions a long way to solve it, we are going to apply it because it can provide the answer more rapidly; thus, considering that 112 km are required, 1 mile equals 1.609 km and 1 gallon equals 3.785 liters, we can set up the proportional factor as shown below:
[tex]112km*\frac{1mi}{1.609 km}*\frac{1gal}{27.8mi}*\frac{3.785L}{1gal}[/tex]
Whereas km, mi and gal are cancelled out as it turns out in L; therefore the required liters are:
[tex]9.48L[/tex]
Best regards!
I NEED THIS TODAY, PLEASE HELP.
Write the following elements in decreasing ionic size. Li+, C4+, F-, O2-
70 POINTS
Answer:
Li+, C4+, O2-, and then F- They're written in decreasing ionic size.
Explanation:
Ionic size means the same thing as ionic radius. Furthermore, Ionic radius is the distance away from the central atom. Ionic radius increases going from top to bottom and decreases across the periodic table.
Lithium is in the 1st family/group with a charge of +1. So it has the biggest ionic radius.
Carbon is in the 4th family/group with a charge of +4. So it has a smaller ionic radius than Lithium.
Oxygen is in the 6th family/group with a charge of -2. So it has a smaller ionic radius than Carbon.
Lastly, Fluorine is in the 7th family/group with a charge of -1. So it has a smaller ionic radius than Oxygen.
what is this element
Answer:
Oxygen
Explanation:
From the question given above, the following data were obtained:
Number of electrons = 8
Number of protons = 8
Number of Neutrons = 8
Name of element =?
Next, we shall determine the atomic number of the element. This can be obtained as follow:
The atomic number of an element is simply defined as the number of protons in the atom of the element. Mathematically, it is expressed as:
Atomic number = proton number
From the question given above,
Number of protons = 8
Therefore,
Atomic number = 8
Comparing the atomic number of the element (i.e 8) with those in the periodic table, we can conclude that the element is oxygen since no two elements have the same atomic number.
2. Which number is not a coefficient in the equation,
2C6H14+ 19O2,-- 12CO2,+ 14H2O?
Answer:
2, 19, 12 and 14 are the coefficients.
Which of the following statements about tobacco use is not true?
a. Nicotine narrows blood vessels and puts added strain on the heart.
b. Smoking improves athletic performance.
c. Smoking can wreck lungs.
d. Nicotine in smokeless tobacco is addictive.
Explanation:
b and c statements are not true
if it helps you then plzz mark me brainliest
Answer:
B.) Smoking improves Athletic performance
Explanation:
What is the term used to describe a phase change from liquid to solid?
When a liquid changes into a solid, it is called solidification. When a gas changes into a solid, it is called deposition . When a liquid changes into gas, it is called evaporation. Phase changes are usually caused by changes in temperature or pressure.
The mass of one gallon of water is approximately 3.78 kg or 3780 grams. How many moles are contained in one gallon of water?
a. 102
b. 210
c. 120
d. 201
Answer:
Number of moles of water = 210 mol
Explanation:
Given data:
Mass of water = 3780 g
Number of moles of water = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of water = 18 g/mol
Number of moles = 3780 g/ 18 g/mol
Number of moles of water = 210 mol
If 2.35 L hydrogen gas react with nitrogen gas to form nitrogen trihydride, how many grams of nitrogen will be needed for the reaction to be completed?
0.98 g
0.49 g
21.93 g
1.47 g
Answer:
1.47 g
Explanation:
help put them in order
Answer:
hello
Explanation:
hi
true or false
1. resistance provides friction to electron movement
2.high resistance will speed up electron movement
3.a circuit is an open path for electrons to move through
4. in a circuit, electrons move from the low voltage area to the higher
5. in a circuit, the light bulb is called the load
Answer:1
Explanation: friction is showing us how in the past
Not all elements readily fit in the metal or non metal groupings. These elements are called metalloids. Examine the table below and classify W, X and Y as metals, metalloids or non-metals.
W= Lustre: Moderately high
Electrical conductivity: Low
Density: Medium
Melting point: Very high
X= Lustre: Low
Electrical conductivity: Nil
Density: Low
Melting point: Low
Y= Lustre: High
Electrical conductivity: High
Density: High
Melting point: High
How many moles are in 99.5 grams of titanium? Round your answer to the nearest hundredth. Be sure to include units.
Answer:
1000
Explanation:
question: convert 22.63 miles of oxygen to volume
very urgent
Answer:
506.912 L
Explanation:
From the question given above, the following data were obtained:
Number of mole of O₂ = 22.63 moles
Volume of O₂ =?
Recall:
1 mole of a gas occupy 22.4 L at STP.
With the above information, we obtained the volume occupied by 22.63 moles of O₂ as follow:
1 mole of O₂ occupied 22.4 L at STP.
Therefore, 22.63 moles of O₂ will occupy = 22.63 × 22.4 = 506.912 L at STP.
Thus, 22.63 moles of O₂ is equivalent to 506.912 L.