Someone pls help me I will make you brain

Answer:

Explanation:

By observing chemical reactions, we are able to understand and explain how the natural world works. Chemical reactions turn food into fuel for your body, make fireworks explode, cause food to change when it is cooked, make soap remove grime, and much more.

Answer:

alpha decay

Explanation:

an unstable element is radioactive in nature.

Polonium is a chemical element with a large, unstable nucleus.

the most stable isotope of Polonium is Polonium-209, which typically undergoes an alpha decay to form lead-205 and the emission of an alpha particle.

1. Polonium has a large, unstable nucleus. Through which process is it most likely to become stable?

alpha decay

2. Which type of energy does alpha decay generate?

kinetic

3. Use the equation to answer the question.

14 6C→14 7N+ 0−1e

Which type of radioactive decay does the equation model?

beta-minus decay

4. How does the nucleus change in beta-plus decay?

The mass number remains the same, and the atomic number decreases by one

5. An unstable nucleus undergoes gamma decay. How does the nucleus change?

It becomes more stable by repositioning its particles

Explanation: I did the test

Answer:

B. Drink Mix

Explanation:

Assuming the drink mix is something like Kool-aid, it is soluble in water. The rest are solids that cannot be dissolved in water.

mjhhhhhhhhhhmmmmnnñbb

Answer:  A) Rock formed by...magma or lava

Explanation:

As the question says, igneous rocks are formed from the cooling and solidification of magma or lava.

just a bit of visual aid thanks to Thoughtco.

Answer:

It is the first one - Rock formed by the cooling and solidification of hot liquid magma or lava.

Explanation:

Answer:

brainless me plss i help you out

Wavelength = Speed of Light ÷ Frequency

                     = (2.99 × 10⁸ m/s) ÷ ( 2.45 × 10⁹ /s)

                     = 1.22 × 10⁻¹ m

The wavelength of a light of frequency   2.45 × 10⁹ /s is 1.22 × 10⁻¹ m.

Notes:

Hz ≡ /s

Matter is anything that has mass and takes up space.

hope this helps <3

Answer:

ExplanationWhat are the properties of potassium?

Image result for give one other difference between the properties of copper and potassium

Potassium metal is soft and white with a silvery lustre, has a low melting point, and is a good conductor of heat and electricity. Potassium imparts a lavender colour to a flame, and its vapour is green. It is the seventh most abundant element in Earth's crust, constituting 2.6 percent of its mass.:

Difference between copper and potassium is the valence electron of sodium is in the 3s orbital whereas the valence electron of potassium is in the 4s orbital.

Potassium metal is soft and white with a silvery luster, has a low melting point, and is a good conductor of heat and electricity.

It is malleable, ductile, and an extremely good conductor of both heat and electricity. It is softer than zinc and can be polished to a bright finish.

Learn more about the copper and potassium here: brainly.com/question/15987580

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Answer:

8m/min

Explanation:

120 m / 15 min = 8 meters per min

Answer:

D: Na

Explanation:

Hope this helps!

Have a nice day!!

:D

Answer:

Saponification

Explanation:

When treated with a base such as NaOH, the ester is transformed back to alcohol and the sodium salt of carboxylic acid. Saponification is the name given to the reaction since it is utilized in the production of soap.

Answer:

It is the length of these chains, and the patterns in which they are arrayed, that make polymers strong, lightweight, and flexible.

Explanation:

Synthetic polymers are made up of long chains of atoms, arranged in repeating units, often much longer than those found in nature. It is the length of these chains, and the patterns in which they are arrayed, that make polymers strong, lightweight, and flexible. In other words, it's what makes them so plastic.

Answer:

c

Explanation:

Answer:

2

Explanation:

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Answer:

b).   0.732

Explanation:

52g Na₂SO₄ x     1 mol Na₂SO₄       x      2 mol Na

                          -------------------------      --------------------  =  0.732 mol Na

                           142.04 g Na₂SO₄       1 mol Na₂SO₄

Atomic Mass Units

Na₂ = 22.99 x 2 = 45.98

S     = 32.06

O₄ = 16 x 4 = 64

Na₂SO₄ = 45.98 + 32.06 + 64 = 142.04

There are 2 moles of Na in 1 mole of Na₂SO₄

Answer:

Potential energy

Explanation:

When an object is moving its called Potential energy.

When an object is not moving it is called kinetic energy.

p = latm

t = 273.15K

R= 0.08206 L atm mol K

75.0g02

16.00 (O₂) = 4.6875mol mol

9

Ideal gas law: PV = nRT, solve for volume: V = nRT P

V =

4.6875mol 0.08206 L-atm mol. K · 273.15K

V = 105L

latm

Answer:

Polystyrene is a versatile plastic used to make a wide variety of consumer products.

Explanation:

Answer:

polystyrene, a hard, stiff, brilliantly transparent synthetic resin produced by the polymerization of styrene. Styrene is obtained by reacting ethylene with benzene in the presence of aluminum chloride to yield ethylbenzene.

Explanation:

in other words its a plastic

Answer:

Elements in the same group has different physical properties such as boiling and melting points. However there are trends of their physical properties down the group.

Explanation:

You should look at the perdoic table to for extra help

The boiling points and melting points of the given elements does not support the claim that elements of the same group have similar physical properties.

The boiling point of a substance is the temperature at which it changes from liquid state to gaseous state. Melting point is the temperature at which the substance changes from solid to liquid state.

Elements in the same group shows similar physical and chemical properties. But from the boiling and melting point we cant say that they are in the same group.

Elements in a group shows a trend in boiling point and melting point but cannot be distinguished with this from other groups.

Hence, boiling point and melting point of the elements do no support for the similar properties in a group.

To learn more about groups of elements, refer the link below:

https://brainly.com/question/4418354

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Your question is incomplete, but most probably your full question was,

Do the boiling points and melting points of these elements support the claim that elements of the same group have similar physical characteristics? (image uploaded)

Explanation:

The nomenclature of ionic compounds is given by:

1. Positive is written first.  And if the metal atom has various oxidation states then its oxidation state is to be mentioned in brackets with help of roman numbers

2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.

1.)  : Calcium chloride  (Correct)

In the given compound, calcium has oxidation state of +2 and chlorine has oxidation state of -1.The name is correct.

2.)  : Copper (II) oxide   (Incorrect)

In the given compound,copper has the oxidation state of +1 and oxygen has oxidation state of -2.So ,the correct name will be Copper (I) oxide.

3.)  : Lead (II) sulfide   (Incorrect)

In the given compound, lead has the oxidation state of +4 and sulfur has oxidation state of -2. So ,the correct name will be Lead (IV) sulfide.

Answer:

One metal causes a chronic effect, compared to the other

Explanation:

because the question only said ONE is the same, didn't they? so that would mean that not all the metals are the same for both towns

Answer:

56.6 g/mol.

Explanation:

Assuming here that we have 100 atoms of each element. The percentage tells us that we have 10 atoms of the 55 isotope, 20 of the 56, and 70 of the 57.  

So the total is 10*55 + 20*56 + 70*57 = 5,660. And to get the average, we just divide by the total number of atoms (100).  

Atomic mass = 5660/100 = 56.6  

Answer:

ionic

Explanation:

ionic transfer of e^- ions formed (charges)

ionic=non-metal+ metal

ex: F+Ca

covalent sharing e^- no true charges

covalent= non-metal+ non-metal

ex: F+P

( my notes)

Answer:

150 molecules of oxygen

Explanation:

Answer:

7.83 x 10^23 atoms

Explanation:

The most likely ion of Phosphorous is P³⁻ (group 15) since gaining three electrons is the most energetically favorable way for it to follow the octet rule.

Because the charge on ions is equivalent to their oxidation state, then -3 is the most likely oxidation number of Phosphorous.