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3 years ago

_______ store food or pigments ( I'm learning about cells)

Chemistry

1 answer:

Ivahew [28]3 years ago

7 0

Plastids store food or pigments

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Which volume of ethane gas, in cm3 , will produce 40cm3 of carbon dioxide gas when mixed with 140cm3 of oxygen gas, assuming the

Gemiola [76]

The volume of ethane gas, C₂H₆ in cm³ that will react to produce 40 cm³ of CO₂ is 20 cm³

<h3>Balanced equation </h3>

2C₂H₆ + 7O₂ —> 4CO₂ + 6H₂O

From the balanced equation above,

4 cm³ of CO₂ were obtained from 2 cm³ of C₂H₆

<h3>How to determine the volume of C₂H₆ needed </h3>

From the balanced equation above,

4 cm³ of CO₂ were obtained from 2 cm³ of C₂H₆

Therefore,

40 cm³ of CO₂ will be obtain from = (40 × 2) / 4 = 20 cm³ of C₂H₆

Thus, 20 cm³ of C₂H₆ are required for the reaction.

Learn more about stoichiometry:

brainly.com/question/14735801

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7 0

2 years ago

C. How many grams of Na2SiO3 can react with 0.800 g of HF?

finlep [7]

Answer:

Mass = 0.610 g

Explanation:

Given data:

Mass of Na₂SiO₃ = ?

Mass of HF = 0.800 g

Solution:

Chemical equation:

Na₂SiO₃ + 8HF → H₂SiF₆ + 2NaF + 3H₂O

Number of moles of HF:

Number of moles = mass/ molar mass

Number of moles = 0.800 g/ 20 g/mol

Number of moles = 0.04 mol

Now we will compare the moles of HF and Na₂SiO₃.

HF : Na₂SiO₃

8 : 1

0.04 : 1//8×0.04 = 0.005

Mass of Na₂SiO₃:

Mass = number of moles × molar mass

Mass = 0.005 mol × 122.07 g/mol

Mass = 0.610 g

5 0

3 years ago

In a electrolytic cell, where does oxidation occur

icang [17]

Reduction takes place at the cathode and oxidation occurs at the anode.

Anode

3 0

3 years ago

Read 2 more answers

The salt NaC2H3O2 would form from the combination of:

Nuetrik [128]

B sodium chloride and nitric acid

4 0

3 years ago

_Cuo +H, → _Cu + _H,0

Elena-2011 [213]

<h3>Answer:</h3>

CuO(s) + H₂(g) → Cu(s) + H₂O(l)

<h3>Explanation:</h3>

Assuming the reaction is the reduction of CuO by H₂
Then the balanced equation for the reaction is;

CuO(s) + H₂(g) → Cu(s) + H₂O(l)

The equation shows the reducing property of hydrogen gas, such that hydrogen reduces metal oxides such as copper(ii)oxide to the respective metals.
The law of conservation requires chemical equations to be balanced so as the mass of reactants will be equal to that of products.

In this case; there is 1 copper atom, 1 oxygen atom and 2 hydrogen atoms on both side of the equation and thus the equation is balanced.

3 0

3 years ago