What is this equation balanced?

Answer:

Electrons arrangement change is almost constant down the group, hence nuclear charge is almost constant.

But the energy levels on which electrons are arranged increase down the group, hence shielding or screening effect increases.

Answer: i rlly dont know srry

Explanation:

Answer: amplitude, wavelength, and frequency.

Explanation:

Answer:

cell,brain,tissue

Explanation:

Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green

hoped I helped

Answer:

Your answer is going to be B. the burning of fossil fuels

Explanation:

This is because carbon monoxide is extremely toxic for us humans. An example of this could be pollution. Hope this helps! :)

Answer:

When a solution is heated, the solvent evaporates, leaving behind the dissolved solids as residue. When a solution containing dissolved solutes is heated, the solvent will evaporate. Only the solute will remain in the evaporating dish.

hope it helps! please mark me brainliest

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When using the process of evaporation to separate a mixture, solute is left behind in the evaporating dish

Evaporation is a sort of vaporization that occurs on a liquid's surface when it transitions from a liquid to a gas.

Evaporation is a separation technique that can be used to separate components of a combination including a decomposed solid in a liquid. The liquid gets evaporated, which means it is converted from a liquid to a gas. This frequently necessitates the use of heat. The solid will be all that remains after the liquid has entirely evaporated.

To more about evaporation.

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Answer:

i thunk venus may be right or wrong tel7

Answer:

saturn:85 minutes

venus: 4.25 minutes

Answer: 43.125g

Explanation:4Na+ O2=2Na2O

Molar mass: 23. 32. 62. React.mass: 92.

Answer:

C

Explanation:

LIFE LESSON: mixing cleaning products can create toxic chemicals and gas. please do NOT attempt doing anything like that kids.

Answer:

Any kind, as long as there is an action.

Answer:

Energy can be transferred from one form to another like kinetic energy to potential energy, light energy to heat energy, kinetic energy to electrical energy, light energy to chemical energy .etc ...

Explanation:

brainest please

The empirical formula : C₁₀H₂₀O

Given

Combustion of menthol

Required

The empirical formula

Solution

Mass of CO₂ produced : 0.449 g

mass C = 12/44 x 0.449 = 0.122

Mass water produced : 0.1840 g

Mass H = 2.1/18 x 0.1840 = 0.02

Mass O in menthol :

=mass sample - (mass C+mass H)

= 0.1595 - (0.122+0.02)

= 0.0175

Mol ratio C : H : O in sample :

= 0.122/12 : 0.02/1 : 0.0175/16

= 0.01 : 0.02 : 0.001

= 10 : 20 : 1

Answer:

plankton

Explanation:

like in spongebob lol but for real I'm a marine biologist I know this is the answer lol

Answer:

Hydra bud

Explanation:

this plant reproduces asexually

Explanation:

[tex] \frac{6.900 \times {10}^{10} }{4.000 \times {10}^{8} } \\ 1.725 \times {10}^{10 - 8} \\ 1.725 \times {10}^{2} [/tex]

Hope it will help you :)

Answer:

6.94 x 10²⁴molecules

Explanation:

Given parameters:

Mass of water  = 207.45g

Unknown:

Number of molecules  = ?

Solution:

To solve this problem, we must understand:

      1 mole of a substance  contains 6.02 x 10²³ molecules

Now, first find the number of moles of water;

 Number of moles  = [tex]\frac{mass}{molar mass}[/tex]  

 Molar mass of water  = 2(1) + 16  = 18g/mol

  Number of moles  = [tex]\frac{207.45}{18}[/tex]   = 11.53moles

So;

          1 mole of a substance  contains 6.02 x 10²³ molecules

       11.53moles of carbon dioxide will contain 11.53 x  6.02 x 10²³

                                                                 = 6.94 x 10²⁴molecules

Answer:

hhhsstyi chick to yay to today do y'all

Answer:

 ¹₀n

Explanation:

The given expression is:

          ²⁷₁₃Al      +     ₐᵇT   →   ²⁴₁₁Na    +    ⁴₂He

This expression is typical of nuclear reactions. To balance this expression we must conserved the mass number and the atomic number.

The mass number is the superscripts and the atomic number is the subscript;

 Now;

 conserving mass number:

             27 + b  = 24 + 4

             27 + b  = 28  

                   b  = 28 - 27  = 1

conserving the atomic number;

            13 + a  = 11 + 2

             13 + a  = 13

                    a  = 0

So;

The particle T is a neutron    ¹₀n

Answer:

I believe the answer is B. Noble gases.

Explanation:  

their outer shell is already full of electrons which makes then less reactive.

Answer:

Explanation:

21:B 22:B

Answer:

[tex]\boxed {\boxed {\sf About \ 1.040 \ moles \ of \ nitrogen }}[/tex]

Explanation:

To convert from grams to moles, we must use the molar mass. This can be found on the Periodic Table. We have a sample of nitrogen, so look for N on the table.

Now, use this molar mass as a ratio.

[tex]\frac {14.007 \ g \ N }{1 \ mol \ N }[/tex]

Multiply by the number of grams in the sample (14.57)

[tex]14.57 \ g \ N *\frac {14.007 \ g \ N }{1 \ mol \ N }[/tex]

Flip the fraction so the grams of nitrogen will cancel.

[tex]14.57 \ g \ N *\frac {1 \ mol \ N }{14.007 \ g \ N}[/tex]

[tex]14.57 *\frac {1 \ mol \ N }{14.007 }[/tex]

[tex]\frac {14.57 \ mol \ N }{14.007 }[/tex]

[tex]1.04019419 \ mol \ N \\[/tex]

The original measurement of grams had 4 significant figures, so we need to round our answer to the same number of sig figs.

For the number we calculated, that is the thousandth place. The 1 in the ten thousandth place tells us to keep the 0 in the thousandth place.

[tex]1.040 \ mol \ N[/tex]

There are about 1.040 moles of nitrogen in 14.57 grams.

Answer: A. is elliptical

B. IS inrregulur  C. spiral

Explanation: this should be it

Explanation:

1 mole is equal to 1 moles Iron(III) or 832.29538 grams, so 2 moles Iron(III) = 1664.59076 grams

Answer:

True

Explanation:

Answer:

False

Explanation:

Answer:

1.05 hopefully this helps

Does anybody know what the dependent and independent variables are?

Answer: NaCl and H2O

Explanation: Products are on the right side of the arrow :)

Answer:

B. NaCI

D. H2O

Explanation:

The product is the result, which in this case is sodium chloride and water.

answer; the last two is me and u :