Which of the following is true about nuclear fusion
a) it occurs in the sun
b) a heavy atom is split
c) it can be controlled easily
d) an electron is lost by the atom

Answer:

i looked it up its slinky waves

Explanation:

Answer:

diffracted

Explanation:

Sure it might look like a slinky but if you're talking about waves then it's deffinetly diffracted hope this helps

Answer: The atomic number indicates the number of protons within the core of an atom. The atomic number is an important concept of chemistry and quantum mechanics. An element and its place within the periodic table are derived from this concept. ... These electrons mainly determine the chemical behaviour of an atom. The chemical properties of an element, are determined by the number of protons in the nucleus. This number of protons is called the atomic number. The mass of the atom, its atomic mass, depends upon the sum of the number of protons and the number of neutrons present in the nucleus.

Hope this helps....... Stay safe and have a Merry Christmas!!!!!!! :D

Explanation:

Outer Electrons/Valence Electrons determine the chemical properties....Or Somehow we can say in organic compounds, functional group determine mostly chemical properties...

Answer:

λ = 0.1 nm

E = 2 × 10⁻¹⁵ J

Explanation:

Step 1: Given data

Frequency of X-rays (ν): 3 × 10¹⁸ s⁻¹

Step 2: Calculate the wavelength (λ) of a photon of X-rays

We will use the following expression.

c = λ × ν

where,

c: speed of light

λ = c / ν

λ = (3.00 × 10⁸ m/s) / 3 × 10¹⁸ s⁻¹

λ = 1 × 10⁻¹⁰ m × (10⁹ nm/1 m) = 0.1 nm

Step 3: Calculate the energy (E) of a photon of X-rays

We will use the following expression.

E = h × ν

where,

h: Planck's constant

E = 6.63 × 10⁻³⁴ J.s × 3 × 10¹⁸ s⁻¹

E = 2 × 10⁻¹⁵ J

It ISNT occurs in substances that have discrete molecular structure

Explanation:

I took the test and got this wrong

Answer:

The name of the products are CO2 = carbon dioxide and H2O = water. The type of reaction is a combustion reaction.

Explanation:

Answer:

carbon di oxide and water

Answer:

Explanation:

3: Given data:

Number of moles of strontium nitrate = 3.00×10⁻³ mol

Number of atoms = ?

Solution:

There are 9 moles of atoms in 1 mole of Sr(NO₃)₂.

In 3.00×10⁻³ moles,

9 mol × 3.00×10⁻³

27.00×10⁻³ mol

Number of atoms in 3.00×10⁻³ mol of Sr(NO₃)₂:

27.00×10⁻³ mol × 6.022×10²³ atoms / 1mol

162.59×10²⁰ atoms

4)Given data:

Mass of calcium hydroxide = 4500 Kg (4500/1000 = 4.5 g)

Number of moles = ?

Solution:

Number of moles = mass in g/molar mass

by putting values,

Number of moles = 4.5 g/ 74.1 g/mol

Number of moles = 0.06 mol

5) Given data:

Number of atoms of silver nitrate = 1.06×10²³

Number of moles = ?

Solution:

1 mole of any substance contain  6.022×10²³ atoms .

1.06×10²³ atoms × 1 mol /  6.022×10²³ atoms

0.176 moles of silver nitrate

Explanation:

carbon dioxide is it gas that is present in the air plants collect carbon dioxide through tiny holes called Stomates. during the process of photosynthesis, Stomates are also used to expel a gas called oxygen. Oxygen is very important for animals like human -- we need it to breathe !

Answer:

C

Explanation:

75 mile shallow flat area just off coastlines

Answer:

A. all other bulbs will no longer work

Answer:

halogens

Explanation:

Electronegativity increases as you move to the right and up the periodic table. Thus, halogens would have the greatest electronegativity.

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Answer:

Fluorine has nine electrons

Answer:

Q = 3440Kj

Explanation:

Given data:

Mass of gold = 2kg

Latent heat of vaporization = 1720 Kj/Kg

Energy required to vaporize 2kg gold = ?

Solution:

Equation

Q= mLvap

It is given that heat required to vaporize the one kilogram gold is 1720 Kj thus, for 2 kg

by putting values,

Q= 2kg ×  1720 Kj/Kg

Q = 3440Kj

Moles of PF₃ : 4

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

[tex]\tt P_4(s)+6F_2(g)\rightarrow 4PF_3(g)[/tex]

1.25 moles of P₄(s) is reacted with 6 moles of F₂(g)

Limiting reactant : the smallest ratio (mol divide by coefficient)

P₄ : F₂ =

[tex]\tt \dfrac{1.25}{1}\div \dfrac{6}{6}=1.25\div 1\rightarrow F_2~limiting~reactant(smallest~ratio)[/tex]

mol PF₃ based on mol of limiting reactant(F₂), so mol PF₃ :

[tex]\tt \dfrac{4}{6}\times 6~moles=4~moles[/tex]

in one molecule we have one oxygen atom so we will have 4 oxygen atoms in 4 molecules

Answer:

Yes

Explanation:

Answer:the plural of walrus is walruses

Explanation:

Answer:

The given statement is "True". A further explanation is provided below.

Explanation:

Therefore this obvious response is the right one.

Answer:

chickens

Explanation:

we are more related to chickens as for we dont fly such like bats. chickens genes are closer to us. we cant be able to be upside down as long as bats can and we dont have their really good r=hearing either.

Answer:

7 no ans is C

8 no ans use of magnet .I am not sure

1 kg = 1000g

1l = 1000cm3

therefor

kg/l = 1000g/1000cm3

cancel the zeros

kg/l = g/cm3 demonstrated

Answer:

Anything below 7.0 is acidic, and anything above 7.0 is alkaline, or basic. pH scale, ranging from 0 (very acidic) to 14 (very basic/alkaline) and listing the pH values of common substances.

Explanation:

PRESS THE CROWN

The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic.

Explanation:

Answer:

Phosphorus.

Explanation:

Phosphorus is the important fertilizer which comes through the dust storms of Sahara desert and provides this nutrient to the soils of the Amazon basin. Phosphorus is an important macronutrient that is necessary for the growth and development of plants so we can conclude that this dust storms are very important for the fertility of the soils present in Amazon basin.

Answer:

Roman numbers are oxidation state of the metals

Because some elements of metals show more than one oxidation state like iron Fe2+ in ferrous and Fe3+ in ferric.

Explanation:

Answer:

ok thats cool good luck with that and always remember God is there for you :)

Answer:

yeah

Explanation:

in every situation we should trust God

Answer:

1. Polar

2. Non-polar

3. Non-polar

4. Polar

5. Non-polar

6. Polar

Explanation:

Polar bonds are formed between molecules that share electrons unequally/unevenly. In a polar molecule, one atom is more electronegative than the other i.e it attracts/pulls more electrons than the other atom, hence, it ends up leaving the other atom with a positive charge i.e fewer electrons around its atom. Also, every molecule that has a symmetrical arrangement is NON-POLAR while the opposite is POLAR.

Based on this, the answers to the asked questions are in BOLD.

1. A POLAR bond is one where there are more shared electrons grouped around one atom than the other.

2. A NON-POLAR bond is one where the electrons are evenly distributed between the two atoms sharing electrons.

3. A molecule with symmetry is NON-POLAR

4. A molecule that does not have symmetry is POLAR.

5. A NON-POLAR molecule has its valence electrons evenly distributed around the molecule.

6. A POLAR molecule has one of its sides with more or fewer electrons than the other sides.

Answer:

a liquid with weak intermolecular forces and a high temperature

Explanation:

According to encyclopedia Britannica, "Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature. The temperature at which the vapour pressure at the surface of a liquid becomes equal to the pressure exerted by the surroundings is called the boiling point of the liquid."

This implies that the vapour pressure of a liquid tends to increase as the temperature of the liquid increases. Recall that vapour pressure also depends on the magnitude of intermolecular forces. The greater the magnitude of intermolecular forces, the lower the vapour pressure hence water has very much higher vapour pressure than ethane.

Answer:

A liquid with weak  intermolecular forces and a high temperature

Explanation:

I just took the test and got it right

Explanation:

Difference between 63 and 65 = 2.

(63.55 - 63) / 2 * 100% = 27.5%.

(65 - 63.55) / 2 * 100% = 72.5%.

Hence there is 72.5% of the isotope with atomic mass 63 and 27.5% of the isotope with atomic mass 65 in copper.