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Sati [7]
3 years ago
14

A barometer is used to measure air pressure.

Chemistry
1 answer:
jonny [76]3 years ago
4 0
True is the correct answer.
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What are the molecular an empirical chemical formula of a compound made up of these molecules? (Look at Photo)The line stand for
Naya [18.7K]

The molecular formula gives us the total number of atoms of the compound. To do this we are going to count each of the atoms.

We have:

C = 4

H = 8

O = 2

So, the molecular formula will be C4H8O2

The empirical formula is the simplest way to represent a molecule, we simplify taking the denominators of the molecule to its simplest form, as they are all multiplies of two we can divide everything by this number and thus we obtain the empirical formula.

So, the empirical formula will be C2H4O

8 0
1 year ago
What are the four characteristics of plants
UNO [17]
Start of the food chain, one of the keys to survival and, one of the most natural beauties
8 0
4 years ago
How many moles of silver atoms are in 1.8 × 10^20 atoms of silver?
gavmur [86]
1.8x10^20 atoms x (1 mole / 6.022x10^23 atoms) = 3.0x10^-4 mole 
6 0
4 years ago
Copper(II) sulfate forms a bright blue hydrate with the formula CuSO 4 ⋅ n H 2 O ( s ) . If this hydrate is heated to a high eno
Arada [10]

Answer:

The value of n in the hydrate formula is 5 ,CuSO_4.5H_2O.

Explanation:

CuSO_4.nH_2O\rightarrow CuSO_4+nH_2O

Mass of hydrate of copper sulfate = 14.220 g

Moles of hydrate of copper sulfate =\frac{14.220 g}{(159.5+n\times 18) g/mol}

Mass of copper sulfate after heating = 8.9935 g

Moles of copper sulfate = \frac{8.9935 g}{159.5 g/mol}

\frac{14.220 g}{(159.5+n\times 18) g/mol}=\frac{8.9935 g}{159.5 g/mol}

Solving for n, we get:

n = 5

The value of n in the hydrate formula is 5 ,CuSO_4.5H_2O.

5 0
4 years ago
What does heat and pressure have to do with<br> the rock cycle?
UkoKoshka [18]

Answer

Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock. The parent rock can be either sedimentary, igneous, or even another metamorphic rock. The word "metamorphic" comes from Greek and means "To Change Form". ... This changing of rock types is called the "Rock Cycle".

Explanation:

4 0
4 years ago
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