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vredina [299]
3 years ago
13

Hydrogen gas can be produced in the laboratory by the reaction of magnesium metal with hydrochloric acid, according to the follo

wing equation:
Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g)

a. How many grams of hydrogen can be produced when 4.00 g of HCl is added to 3.00 g of Mg?

b. Assuming STP, what is the volume of this hydrogen?
Chemistry
1 answer:
gulaghasi [49]3 years ago
7 0

Answer: 0.11 g H2

Explanation: just took test and got it right

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The point of a cell division is to? a) copy tissue b) common cell c) neuron d) all choices are true
andrew-mc [135]

Answer: a) copy tissue

Explanation:

Tissue and cells in general get damaged, or just break down from wear and tear. So the cells divide to make up for this shortcoming, effectively replacing any broken parts with fresh new ones.

5 0
3 years ago
Why are large crystals of sodium chloride used instead of small<br> crystals when making ice cream
matrenka [14]

Answer:

Sodium chloride is added to the ice to lower the freezing point of the ice. Large crystals dissolve more slowly than small crystals. This allows time for the ice cream to freeze more evenly.

Explanation:

6 0
3 years ago
Pls help me will mark Brianliest!!! I know the answer choice is a bit cut off. Topic is chem equilibrium
Svetlanka [38]

Answer:

See notes on LeChatlier's Principle I gave you yesterday.

Explanation:

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6 0
3 years ago
A compound with the empirical formula C2HF4 was found to have a molar mass of about 200g/mole. What is the molecular formula of
alukav5142 [94]

Answer:

C_4H_2F_8 is the molecular formula of the compound.

Explanation:

For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is :

n=\frac{\text{molecular mass}}{\text{empirical mass}}

We are given:

Mass of molecular formula = 200 g/mol

Mass of empirical formula of C_2HF_4 :

2 × 12 g/mol + 1 × 1 g/mol + 4 × 19 g/mol = 101 g/mol

Putting values in above equation, we get:

n=\frac{200 g/mol}{101 g/mol} =1.9 \approx 2

Multiplying this valency by the subscript of every element of empirical formula, we get:

C_{(2\times 2)}H_{(1\times 2)}F_{(4\times 2)}=C_4H_2F_8

C_4H_2F_8 is the molecular formula of the compound.

5 0
3 years ago
Which formula represents a molecule of 2 - chlorobutane?
Flauer [41]
Formula of 2-chlorobutane - C4H9Cl
Structure of 2-chlorobutane is attached.

Hope this helps!

5 0
3 years ago
Read 2 more answers
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