Vi. Lithium (Li) has an isotope with atomic mass 6. How would it be identified in isotope notation?

to find the mass of 3.2 moles of calcium for carbonate which of the following is used to calculate the amount

natka813 [3]

I believe it to be g/mol of Calcium carbonate
because to finde mass...u must have grams(g) as units....
it is the only one that have g as units

as for the first answer the avogadros number gives u the number of atoms in one mole of calcium carbonate....
the second one is based on ... At s.t.p one mole of gas occupies 22.4 dm³⇒to find volume

6 0

3 years ago

Wave A carries more energy than wave B. Wave B must have a smaller than wave A

Anuta_ua [19.1K]

Those waves carry an amount of energy that can be measured. The energy in a wave is determined by two variables. One is amplitude, which is the distance from the rest position of a wave to the top or bottom. Large amplitude waves contain more energy. Wave A has a greater intensity and transfers more energy. Wave B has a greater intensity and transfers more energy. Waves that require matter to transfer energy are mechanical waves. The matter through which a mechanical wave travels is called a medium. A mechanical wave travels as energy is transferred from particle to particle in the medium. There are two kinds of mechanical waves. The greater the waves amplitude the greater the waves energy. ... A wavelength will travel only as long as it has energy to carry. Gamma rays
Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. Electromagnetic waves cause oscillations in electrical and magnetic fields. It is important to remember that all waves transfer energy but they do not transfer matter . For example, if a ball is placed on the surface of a pond when ripples move across it, the ball will move up and down but not outwards with the wave.

7 0

3 years ago

I need 20 FACTS that are either important or interesting. Give me both, please! I need this ASAP so if you could hurry, that wou

diamong [38]

1. humans cant live without water
2. dolphins use up to 20% of their cerebral cortex
3. vikings were the first to inhabit dogs (wolves)
4. tom brady now has 5 superbowl rings
5. im black
6. whales are capable of ejaculating up to speeds as fast as a 12 gauge shotgun, under water
7. sharks have to keep swimming or they'll sink. this is why they swim mostly in shallow areas
8. my high school orchestra is the oldest public highschool orchestra in the whole united states, here in winfield kansas
9. I love my mother
10. she loves me as well
11. a roach can live up to 3 weeks without its head
12. trees are made out of wood
13. to find the line of symmetry on a parabola you use -b/2a
14. animals give birth
15. reptiles lay eggs
16. frogs are neither male nor female
17. Eminem is the rap god
18. my dad has diabetes
19. it is impossible to scratch a diamond with your fingernail
20. Bob's Bugers is the best show on adult swim <span />

6 0

3 years ago

(01.01 MC)<br> Which of the following could be considered a scientific statement

Mashcka [7]

Answer:

hmmmm not sure and don't know

Explanation:

7 0

4 years ago

Sodium combines with water to produce sodium hydroxide and hydrogen gas. Which word equation represents this violent reaction?

Natalka [10]

Answer: sodium + water → sodium hydroxide + hydrogen

Explanation:

1) The first part of the statment "sodium combines with water" means that these two pure substances are the reactants.

Sodium is an alkali metal (group 1: Li, Na, K, Rb, Cs, Fr).

A typical chemical property of the alkali metal elments is that they react violently with water fo form the corresponding hydroxide and hydrogen gas.

2) The next two words, "to produce ". indicates, precisely, that what follow is the product of the reaction. In the chemical reaction it is indicated by the arrow →

3) Finally, you are told the products of the reaction: sodium hydroxide and hydrogen gas.

4) The word equation then follows the order reactants → products, which in this case is the sodium + water → sodium hydroxide + hydrogen

5) Using chemical symbols and conventions, that is:

Na(s) + H₂O (l) → NaOH(aq) + H₂(g).

5 0

3 years ago

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