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4 years ago

How many nonmetals are there on the periodic table?

Chemistry

2 answers:

ZanzabumX [31]4 years ago

4 0

There are 17 nonmetals

Hunter-Best [27]4 years ago

3 0

There are 17 nonmetals: hydrogen, helium, carbon, nitrogen, oxygen, fluorine, neon, phosphorus, sulfur, chlorine, argon, selenium, bromine, krypton, iodine, xenon, and radon.

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What is the difference between a chemical process and and physical process

Flauer [41]

Answer: there is no real difference between the two.

Explanation:

some teachers just like to explain how a chemical reaction is anything involved with chemicals and any other process is just explained as a physical process

8 0

4 years ago

Help! What is the name for addition or subtraction??

kogti [31]

Answer:

I would say operation or symbol

Explanation:

But more an operation I'm sorry I don't really know what your learning so I can't say I know for sure

4 0

3 years ago

Muiltplying 2.5 x 10^10 by 3.5 x 10^-7

andrey2020 [161]

Answer:

The value of $\left(2.5 \times 10^{10}\right) \times\left(3.5 \times 10^{-7}\right)$ is 8750

Solution:

$\left(2.5 \times 10^{10}\right) \times\left(3.5 \times 10^{-7}\right)$

$\Rightarrow\left(2.5 \times 10^{10} \times 3.5 \times 10^{-7}\right)$

$\Rightarrow\left(2.5 \times 3.5 \times\left(10^{10} \times 10^{-7}\right)\right)$

$\Rightarrow(2.5 \times 3.5) \times\left(10^{10+(-7)}\right)$

$\Rightarrow(2.5 \times 3.5) \times 10^{3}$

$\Rightarrow 8.75 \times 10^{3}$

$\Rightarrow 8.75 \times 1000=8750$

6 0

3 years ago

How many moles of oxygen gas molecules would you need to make 12.5 moles of water

horrorfan [7]

Answer: 6.25 mol

Explanation:

From the reaction that produces water from its elements (shown in the image), we know that for every mole of oxygen gas consumed, 2 moles of water are produced.

This means that 12.5/2=6.25 mol of oxygen gas is needed.

7 0

2 years ago

PLSSSSS ANSWERRRR?????

vredina [299]

Answer:steeper

Explanation:if it was me thats what i would pick

7 0

3 years ago