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Aloiza [94]
3 years ago
11

The first person who suggested that matter was made up of atoms was the Greek philosopher ____________________ .

Chemistry
2 answers:
abruzzese [7]3 years ago
4 0

Answer:

Democritus

Explanation:

Bond [772]3 years ago
4 0

Answer:

Democritus of Abdera

Explanation:

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What is the alkaline earth metal with the largest atomic number
frez [133]
Radium, which has an atomic number of 88. The Alkaline earth metals are in the second column of the Periodic Table. Hope this helps! 
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3 years ago
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The chemical combination of two or more different atoms in fixed amounts is called a(n)
valkas [14]
I think the correct answer from the list of choices above is option B. <span>The chemical combination of two or more different atoms in fixed amounts is called a compound. There are two type of compounds namely the ionic and covalent compounds.</span>
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4 years ago
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Calculate the number of sucrose molecules in a 75.0 gram sample.
zzz [600]

Answer:

1.32*10^23 molecules

Explanation:

sucrose formula: C12H22O11

molar mass: 12(12.01)+22(1.01)+11(16.00)=342.34g/mol

75.0 g C12H22O11 * (1 mol C12H22O11)/(342.34g C12H22O11)=0.219 mol C12H22O11

0.219 mol * (6.022*10^23)/mol = 1.32*10^23 molecules (three sig. figures)

5 0
3 years ago
When we don't use prefixe ina binary compound​
Karolina [17]

Answer:

Explanation:

Answer will be wrong

5 0
4 years ago
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Which of these expressions are correct variations of the Combined Gas Law?
mafiozo [28]

Answer:

Both

Explanation:

The combined gas law is also known as the general gas law.

From the ideal gas law we assume that n = 1;

So;

              PV  = nRT

 and then;

                  \frac{P_{1}V_{1}  }{T_{1} }  = \frac{P_{2}V_{2}  }{T_{2} }

   If we cross multiply;

                P₁V₁T₂   = P₂V₂T₁

  So;

         T₁ = T_{2} \frac{P_{1}V_{1}  }{P_{2} V_{2} }

Also;

         V₂  = V_{1} \frac{P_{1} T_{2} }{P_{2} T_{1} }

So from the choices both are correct

3 0
3 years ago
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