[Answered] Approximately how many elements occur naturally on Earth? A) 20 B) 60 C) 90 D) ...

This topic contains a solution. Click here to go to the answer

Author Question: Approximately how many elements occur naturally on Earth? A) 20 B) 60 C) 90 D) ... (Read 150 times)

waynest

Hero Member
Posts: 553

on: Aug 27, 2018

Approximately how many elements occur naturally on Earth?

A) 20
B) 60
C) 90
D) 115

Question 2

What is the mass in grams of 1.000 mole of P2O5?

A) 239.03 g
B) 61.96 g
C) 142.0 g
D) 46.98 g

Need homework help now?

Ask unlimited questions for free

Ask a Question

Marked as best answer by a Subject Expert

Li Jun

Sr. Member
Posts: 335

Reply #1 on: Aug 27, 2018

Answer to Question 1

C

Answer to Question 2

C

waynest

Hero Member
Posts: 553

Reply #2 on: Aug 27, 2018

Li Jun

Sr. Member
Posts: 335

Reply #3 on: Aug 27, 2018

You're welcome

« previous next »

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Two important changes occur in the upper airway in croup:The epiglottis swells, thereby occluding th

The nonionic form does not occur in significant amounts in aqueous solutions

Earth with Rings

Flow cytometry data that shows the differences in CD3+ CD4+ cells that occur with HIV infection. ...

Idealized Tidal Bulges on Earth

Early Earth

Author Question: Approximately how many elements occur naturally on Earth? A) 20 B) 60 C) 90 D) ... (Read 150 times)

Related Topics

Need homework help now?