I'm very confused please help​

Answer:

depending on how you change the angle on the ramp the kanetic energy can go up or down depending on how u angle the ramp

Explanation:

Answer:

1. 0.0033 moles of water.

2. 270g of water

3. 12.8g NaCl

4. 6.72g NaHCO3

5. 1190moles Fe2O3

Explanation:

To convert moles to grams or vice versa we require tu use molar mass of the substance as follows:

1. Molar mass water: 18g/mol

0.060g * (1mol / 18g) = 0.0033 moles of water

2. Molar mass water: 18g/mol

15 moles H₂O * (18g / 1mol) = 270g of water

3. We can assume all sea salt is NaCl -Molar mass: 58.44g/mol-

750g NaCl * (1mol / 58.44g) = 12.8g of NaCl

4. Molar mass NaHCO₃: 84g/mol:

0.080mol * (84g/mol) = 6.72g NaHCO3

5. Molar mass Fe2O3: 159.69g/mol:

190kg = 190000g * (1mol / 159.69g) = 1190moles Fe2O3

Answer:

yolo go with C

Explanation:

Answer:   So, a line segment is a piece or part of a line having two endpoints. Unlike a line, a line segment has a definite length.

Explanation:

Answer:

a line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints.

Answer:

C. Daily Organizer. Also called an agenda. We usually write notes in them for school related things so the answer is pretty self explanatory.

Answer:

It pushes back with equal force.

Explanation:

This is pretty much newton's first law.

Explanation:

H−S has least polarity in the bond because the electronegativity difference between H and S is the least.

Answer:

The answer is option B, that is, it has two oxygen atoms.

Answer: [tex]Pb(NO_3)_2(aq)+2NH_4Cl(aq)\rightarrow PbCl_2(s)+2NH_4NO_3(aq)[/tex] .

The insoluble product is lead (II) chloride.

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.  

The balanced chemical equation is:

[tex]Pb(NO_3)_2(aq)+2NH_4Cl(aq)\rightarrow PbCl_2(s)+2NH_4NO_3(aq)[/tex]

The insoluble product is lead (II) chloride.

Answer:The answer is D

The image that shows the phase of the moon one ( 1 ) week after the new moon is ;  ( Image G )

The quarter at which the moon will be one(1) week after the new moon is up in the sky is the first quarter. And at the first quarter the moon will be in its " waning gibbous " phase.

The waning gibbous phase is the stage in the new moon cycle where only one half ( 1/2 ) or 50% of the moon is lit and the moon will remain in this stage up until 21 days.

Hence we can conclude that the image that shows the phase of the moon one week after the new moon is Image G.

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Answer: Carbon Dioxide, Methane, Nitrous Oxide and Fuorinated Gases

Explanation:Carbon dioxide (CO2): Carbon dioxide enters the atmosphere through burning fossil fuels (coal, natural gas, and oil), solid waste, trees and other biological materials, and also as a result of certain chemical reactions (e.g., manufacture of cement). Carbon dioxide is removed from the atmosphere (or "sequestered") when it is absorbed by plants as part of the biological carbon cycle.

Methane (CH4): Methane is emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result from livestock and other agricultural practices and by the decay of organic waste in municipal solid waste landfills.

Nitrous oxide (N2O): Nitrous oxide is emitted during agricultural and industrial activities, combustion of fossil fuels and solid waste, as well as during treatment of wastewater.

Fluorinated gases: Hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride are synthetic, powerful greenhouse gases that are emitted from a variety of industrial processes. Fluorinated gases are sometimes used as substitutes for stratospheric ozone-depleting substances (e.g., chlorofluorocarbons, hydrochlorofluorocarbons, and halons). These gases are typically emitted in smaller quantities, but because they are potent greenhouse gases, they are sometimes referred to as High Global Warming Potential gases ("High GWP gases").

Answer:

in nucleus atom of proton and netwon found

Answer:

3.44 × 10²⁴ atoms of oxygen

Explanation:

Step 1: Calculate the moles corresponding to 163 g of Al₂(SO₄)₃

The molar mass of Al₂(SO₄)₃ is 342.15 g/mol.

163 g × 1 mol/342.15 g = 0.476 mol

Step 2: Calculate the molecules in 0.476 moles of Al₂(SO₄)₃

We will use Avogadro's number: there are 6.02 × 10²³ molecules of Al₂(SO₄)₃ in 1 mole of Al₂(SO₄)₃.

0.476 mol × 6.02 × 10²³ molecules/1 mol = 2.87 × 10²³ molecules

Step 3: Calculate the atoms of O in 2.87 × 10²³ molecules of Al₂(SO₄)₃

According to the chemical equation, the molar ratio of Al₂(SO₄)₃ to O is 1:12. The atoms of O are 12/1 × 2.87 × 10²³ = 3.44 × 10²⁴.

Answer:

D it is D

Explanation:

Answer:

2X₂Y₃    →     4X     +     3Y₂

Explanation:

This problem is about balancing chemical equations.

The reaction is given as:

          X₂Y₃    →     X     +     Y₂

To balance the reaction equation, we use a mathematical approach.

      aX₂Y₃    →     bX     +     cY₂

Conserving X;   2a  = b

                    Y;   3a = 2c

Now, let us make a  = 1

                              b  = 2

                              c  = [tex]\frac{3}{2}[/tex]  

Multiply through by 2;

         a  = 2, b  = 4 , c  = 3;

        2X₂Y₃    →     4X     +     3Y₂

Answer:

Longer wavelengths self means by it's name that the distance between the trough and crust are lesser than that of shorter wavelengths!

The word Lower frequency implies lower energy, thus light cannot easily penetrate the EM wave to excite electrons.

Examples of EM waves with longer wavelength :

Radiowaves, microwaves, etc..

Answer:

Ans => C => 43.3%

Explanation:

2CO + O₂ => 2CO₂

Given     1g CO = 1g/28g·mol⁻¹ = 0.036 mol CO

b/c coefficient of CO = coefficient of CO₂ => moles CO₂ = 0.036 mol = 0.036mol x 44g/mol = 1.57 gCO₂ (theoretical yield)

%Yield = (actual yield/theoretical yield) x 100% = (0.68g/1.57g) x 100% = 43.3%

Answer:

It's used in the vulcanisation of black rubber, as a fungicide and in black gunpowder and a production of sulfuric acid.

Explanation:

Answer: The correct answer is option B. electron.

Explanation:

There are 3 subatomic particles:

An atom forms an ion, when it looses or gains an electron.

Hence, the correct answer is option B. electron.

The particle(s) of the atom that is needed to be expelled or gained in an alchemy process which involves transformation of one element into  valuable elements or atom to another is B:Electron.

Therefore, option B is correct.

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Answer:

The answer is true

Explanation:

Hope this can help

Answer:

Summary. To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

Explanation:

Proton p      +1

Neutron n       0

Electron e-      -1

the answer is B because I jus did that

Doing this because I know I'm kickass at Chemistry.

One source would be human emissions. As humans, we use a lot of machines (like power plants) that produce large amounts of carbon dioxide into the atmosphere. The ocean also produces a lot of carbon dioxide via the evaporation cycle. Polluted waters eventually will go into the atmosphere. Volcanoes, even when not erupted, emit a lot of carbon dioxide as well. Dormant underground magma releases carbon dioxide through the Earth's pores, and even when a volcano erupts, it produces carbon dioxide as well.

Answer:

1:1

Explanation:

Since that is it's half life.