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zhuklara [117]
3 years ago
6

Which substance is NOT a compound?

Chemistry
2 answers:
enyata [817]3 years ago
8 0
B, sodium because if you look at your periodic table it is the only element not compounded with another 
krek1111 [17]3 years ago
8 0

The answer is B. Sodium

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Determine the number of atoms in 5.88 moles sodium.
ozzi
1 mole ------------ 6.02x10²³ atoms
5.88 moles ---- ?

atoms = 5.88 * 6.02x10²³ / 1

= 3.539x10²⁴ atoms

hope this helps!
4 0
3 years ago
What type of claim must be supported by scientifically valid evidence for it to be approved for use on a food label? A. Health c
Lelu [443]
Option A. Health claim

Health claim must be supported by scientifically valid evidence to be approved in using  for food label.

This is also a food guide to all consumers the food content implied by manufacturers to their products.
8 0
4 years ago
Read 2 more answers
Which of the following are properties of mechanical waves? (pick more than 1)
Tamiku [17]

Answer:

I'd say ALL OF THE ABOVE.

A Mechanical wave is a disturbance that transfers energy as it moves through a medium without displacement of the medium itself.

It can Either be Transversal or Longitudinal.

It is Transversal when the particles of the medium move perpendicular to the wave motion.

It requires a medium and begin at a source with a disturbance

So

ALL THE OPTIONS SEEM LEGIT.

7 0
3 years ago
How many atoms are there in 14.3 g of xenon?
olasank [31]

Answer:

6.56 × 10²² atoms Xe

Explanation:

Step 1: Find conversions

Molar Mass Xe - 131.29 g/mol

Avagadro's Number: 6.022 × 10²³

Step 2: Use Dimensional Analysis

14.3 \hspace{3} g \hspace{3} Xe(\frac{1 \hspace{3} mol \hspace{3} Xe}{131.29 \hspace{3} g \hspace{3} Xe} )(\frac{6.022(10)^{23} \hspace{3} atoms \hspace{3} Xe}{1 \hspace{3} mol \hspace{3} Xe} ) = 6.55911 × 10²² atoms Xe

Step 3: Simplify

We have 3 sig figs.

6.55911 × 10²² atoms Xe ≈ 6.56 × 10²² atoms Xe

8 0
4 years ago
Substance a contains 75% carbon and 25% hydrogen. substance b contains 80% carbon and 20% hydrogen. a and b are the same substan
lora16 [44]
It's true that the substance is contain 75% carbon and 25% H
4 0
4 years ago
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