All categories

3 years ago

HELP MA ASAP PLZZ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Chemistry

2 answers:

OverLord2011 [107]3 years ago

6 0

Answer:

Explanation:

son4ous [18]3 years ago

4 0

The best option would be C because it looks like a bass and the rest are prehistoric fossils D is a nautilus and A is a dinosaur skull

You might be interested in

Which is a physical property of milk?

RideAnS [48]

C, because Boiling doesnt change the substance, making it a Physical property

5 0

4 years ago

Consider the balanced chemical equation that follows. You are asked to determine how many moles of water you can form from 4 mol

kodGreya [7K]

<u>Answer:</u> The correct answer is $4molH_2\times \frac{2molH_2O}{2molH_2}=4 molH_2O$

<u>Explanation:</u>

We are given:

Moles of hydrogen gas = 4 moles

As, oxygen is given in excess. Thus, is considered as an excess reagent and hydrogen is considered as a limiting reagent because it limits the formation of products.

For the given chemical equation:

$2H_2(g)+O_2(g)\rightarrow 2H_2O(l)$

By Stoichiometry of the reaction:

2 moles of hydrogen produces 2 moles of water molecule.

So, 4 moles of hydrogen will produce = $\frac{2molH_2O}{2molH_2}\times 4molH_2=4mol$ of water.

Hence, the correct answer is $4molH_2\times \frac{2molH_2O}{2molH_2}=4 molH_2O$

6 0

3 years ago

Explain how to count the number of elements in a compound.

Anna35 [415]

Answer:

Simply identify what elements are in a compound

Explanation:

For example in NaCl we have sodium (Na) and Chlorine (Cl)

In order to do this you would need to recognise the symbols for a certain element: O for oxygen; N for nitrogen; H for hydrogen etc.

3 0

3 years ago

Scientific notation is___

astraxan [27]

The answer for this question is:

B. Scientific notation is used to keep track of very small and very large numbers during mathematical calculations.

7 0

4 years ago

Read 2 more answers

The pH of a 0.25 M (aq) solution of hydrofluoric acid, HF, at 25C is 2.03. What is the value of Ka for HF? Pls show all mathemat

Snezhnost [94]

Answer:

Explanation:

b bhmj sjvkjwv

4 0

3 years ago