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Scilla [17]
3 years ago
14

The density of a substance that has a mass of 7.0 g and a volume of 3.4 cm3 is ​

Chemistry
1 answer:
oksian1 [2.3K]3 years ago
5 0

Answer:

2.05882 g/cm3

Explanation:

the formula p=m/V, or density (p) is equal to mass (m) divided by volume (V)

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When the rate of the forward reaction equals the rate of the backward reaction, the system is said to be in (2 points)
GenaCL600 [577]

Answer:

I believe b, dynamic equilibrium

Explanation:

3 0
3 years ago
Read 2 more answers
You want to make 500 ml of a 1 N solution of sulfuric acid (H2SO4, MW: 98.1). How many grams of sulfuric acid do you need?
umka21 [38]

Answer:

24.525 g of sulfuric acid.

Explanation:

Hello,

Normality (units of eq/L) is defined as:

N=\frac{eq_{solute}}{V_{solution}}

Since the sulfuric acid is the solute, and we already have the volume of the solution (500 mL) but we need it in liters (0.5 L, just divide into 1000), the equivalent grams of solute are given by:

eq_{solute}=N*V_{solution}=1\frac{eq}{L}*0.5L=0.5 eq

Now, since the sulfuric acid is diprotic (2 hydrogen atoms in its formula) 1 mole of sulfuric acid has 2 equivalent grams of sulfuric acid, so the mole-mass relationship is developed to find its required mass as follows:

m_{H_2SO_4}=0.5eqH_2SO_4(\frac{1molH_2SO_4}{2 eqH_2SO_4}) (\frac{98.1 g H_2SO_4}{1 mol H_2SO_4} )\\m_{H_2SO_4}=24.525 g H_2SO_4

Best regards.

4 0
3 years ago
Identify which two compounds below are constitutional isomers
Romashka [77]

Answer:

(CH₃)₃COCH3₃ and (CH₃)₂CHOCH₂CH₃

Explanation:

Isomers are compounds which have the same molecular formula. Constitutional isomers have different connectivity; the atoms are connected in different ways.

1. (CH₃)₃COCH₃

2. (CH₃)₂CHOCH3₃

3. (CH₃)₂CHOCH₂CH₃

Molecules 1 and 3 have the same formula (C₅H₁₂O) and are isomers. Molecule 2 is not an isomer. From the structural formula, it is clear that Molecules 1 and 3 have different connectivity.

4 0
3 years ago
An atom has 19 protons and 20 neutrons. what is the atomic number with steps​
sergey [27]

Answer:

39

Explanation:

add em up

4 0
3 years ago
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Which of the following is true about neutrons?
Alja [10]
D is the only choice here that is appropriate given neutrons' lack of charge
5 0
3 years ago
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