12. Which classification describes the Milky Way? regular spiral barred spiral elliptical irregular

Answers

Answer 1

Answer: the milky way is a spiral galaxy with 2 central arms

Related Questions

The same amount of force is applied to bowling balls one of the balls Waze 8 pounds and the other weighs 13 pounds which bowl will have a greater acceleration
Which element has both metallic and nonmetallic properties?(1) Rb (3) Si(2) Rn (4) Sr
Two most abundant elements in Earth's core are
How does a sedimentary rock turn into a metamorphic rock?
At what temperature will the following reaction happen spontaneously, given that ΔH=8.91×103J and ΔS= –219.20 J/K? CaSO4(s) + 2HCl(g) → CaCl2(s) + H2SO4(l)A) at 298 K B) at 100 K C) It is spontaneous at any temperature. D) It is not spontaneous at any temperature.

If you have 4 moles of zinc and 4 moles of hydrochloric acid, which of these would be the limiting reactant?

Answers

The balanced reaction between Zn and HCl is as follows:
Zn(s) + 2HCl(aq) -> ZnCl2(aq) + H2(g)
This means that HCl would be the limiting reactant.

D) Hydrochloric acid

How does the number of protons compare to the number ofelectrons in an anion?
a There are more electrons than protons.
b There are more protons than electrons.
c
There is no consistent relationship between the
numbers of protons and electrons.
d There are equal numbers of protons and electrons.

Answers

It is A).
Electrons are negatively charged and an anion is a negatively charged ion so that means there is more electrons(negative charge) than protons(positive charge) in an anion

Answer:B is the right answer

Explanation:

Which element is a liquid at 758 K and standard pressure?(1) gold (3) platinum
(2) silver (4) thallium

Answers

The answer would be Thallium. This is an element with Tl as its chemical symbol and atomic number 81. This soft gray post-transition steel is not originate free in nature. When inaccessible, thallium look like tin, but tarnishes when unprotected to air.

Answer: option (4) thallium.

Explanation:

1) You have to look at the normal boling and mleting points of the elements.

2) To be liquid the normal melting point must be lower than 758 K and the normal boiling point must be greater than 758 K.

3) The look at the data in a handbook of properties or in internet, and build a table.

4) The given temperature, 758K, is 758 - 273.15 = 484.85 °C.

Element Normal melting Normal boiling State at 484.85 °C

point (°C) point (°C)

(1) gold 1064 2700 solid

(2) silver 961.8 2162 solid

(3) platinum 1768 3825 solid

(4) thallium 303.5 1457.8 liquid

Then, the only element of the choices whose melting point is less than 758 K (484.85) and its boiling point is greater than that, at 1 atm is thallium. So, it is liquid.

A ________ ion is created when an electron is removed.a. stable
b. neutral
c. positive
d. negative

Answers

Answer: The correct answer is Option c.

Explanation:

Ions are formed when an atom looses or gains electrons.

If an atom gains electrons, it leads to the formation of negative ions known as anions. For Example: Fluorine gains 1 electron to form $F^-$ ions.

If an atom looses electrons, it leads to the formation of positive ions known as cations. For Example: Sodium looses 1 electron to form $Na^+$ ions.

Hence, the correct answer is Option c.

A ________ ion is created when an electron is removed.

a. stable
b. neutral
c. positive
d. negative

A cation or positive ion is created when an electron is removed. The answer is letter C.

When determining an element identity what is the most important Subatomic part to look at?

Answers

Answer: Protons

Explanation: When determining an element identity the most important Subatomic part to look at is the number of protons in the nucleus determines the identity of an atom .

The concentration of greenhouse gases in the atmosphere can and does change. Would conditions on Earth be worse if the concentration of gases increased or if it decreased? Use Figure 4-4 to explain your answer.

Answers

Answer:

The concentration of green house gases must be appropriate in order to maintain an optimum temperature on the earth.

More the concentration of gases on earth, the temperature would increase because the green house gases more heat in it.

If the overall green house gas will decrease then also the temperature on the earth will not be adequate for living as it will be too cold.

hence, the balance is maintained only when there is a proper concentration of carbon dioxide in atmosphere.

According to climate scientists the increase in greenhouse gases is negatively impacting the planet and human life by raising the temperature of the planet which is leading to other adverse climate effects. If greenhouse gases were to decrease it could potentially help the situation to elevate some of the pressures currently leading to climate change. However, if greenhouse gases are to increase it will likely have an increasingly negative impact on human life and the homeostasis of the planet.

Other Questions

Sodiun atom, potassium atom, and cesium atoms have the same ?

NASA communicates with the Space Shuttle and International Space Station using Ku-band microwave radio. Suppose NASA transmits a microwave signal to the Space Shuttle using radio waves with a frequency of 18GHz . Calculate the wavelength of these radio waves.

Which of the following is not a correct formula? A)Ba2O B)Ca3N2 C)KCl D)Li2S

Positrons are spontaneously emitted from the nuclei of(1) potassium-37 (3) nitrogen-16(2) radium-226 (4) thorium-232