Chemistry High School

Which group of organisms disappeared during the mass extinction at the end of the Cretaceous Period?

A. dinosaurs
B. mammoths
C. saber tooth cats
D. trilobites

Answers

Answer 1

Answer:

saber tooth cats

Explanation:

Related Questions

You place 12.0 milliliters of water in a graduated cylinder. Then you add 15.0 grams of metal to the water and the new water level is 13.91 milliliters. What is the density of the metal in grams per milliliter?

Answers

Answer:

The answer is 7.85 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

volume = final volume of water - initial volume of water

volume = 13.91 - 12 = 1.91 mL

We have

[tex]density = \frac{15}{1.91} \\ = 7.853403141...[/tex]

We have the final answer as

7.85 g/mL

Hope this helps you

Answer:

Hello, Im Mack :)

Here is the Correct Solution for your question:

Answer is 7.85 g/mL

Explanation:

The density of a substance can be found by using the formula

-volume = final volume of water - initial volume of water

-volume = 13.91 - 12 = 1.91 mL

-Final Answer is: 7.85 g/mL

Hope this helped you out :)

Comment if you need further help, and I'll reply asap.

Have a great day my friend\ and best of luck to your studies :)

the energy level of the valence electrons in Nitrogen

Answers

Answer:

NITROGEN

Valency = 3Atomic number = 7

Electronic configuration consist

K = 2 , L = 5

on the basis of sub shell

1s^2 , 2s^2 , 2p^3

What is the difference between magnetic stripping and magnetic field reversal?

Answers

Magnetic stripes are evidence of the magnetic field reversal. It's sort of like saying that bear tracks in the snow are evidence that a bear walked by.
Magnetic stripes on the seafloor are formed when new ocean crust is formed. As the magma erupts from the mid-ocean ridges and cools to form rock any minerals containing iron will be oriented in the direction of the magnetic field. When the Earth's magnetic field reverses (every million years or so) the new rock that gets formed will have its magnetic minerals oriented in the opposite direction. This results in a series of magnetic stripes in the rock on the seafloor. (Think of it kind of like a bar code.)
Because new ocean floor is being formed on both sides of mid-ocean ridges and spreading away from the ridges as even newer seafloor is formed, there are symmetric stripes on each side of the ridge. This led to some of the early evidence of tectonic plate motion.
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