1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kipiarov [429]
3 years ago
13

What are 3 ways living creatures use carbohydrates

Chemistry
1 answer:
Zarrin [17]3 years ago
4 0
Food, Storage, and Structure
You might be interested in
pesticides and fertilizers can help farmers to produce more crops. However, overuse of these chemicals can result in?
nadezda [96]
Overuse of the same chemicals can result in the pest becoming immune to the pesticides. 
8 0
3 years ago
The powder mixture (Cu, Al and Fe) = 10g was oxidized from sufficient chloride acid. 1) What are the possible reactions to the p
Mandarinka [93]

Answer:

1) 2Al + 6HCl ⟶ 2AlCl₃ + 3H₂

    Fe + 2HCl ⟶ FeCl₂ + H₂

2) Cu = 2.5 g; Al = 3.5 g; Fe = 4.0 g  

Explanation:

1) Possible reactions

2Al + 6HCl ⟶ 2AlCl₃ + 3H₂

Fe + 2HCl ⟶ FeCl₂ + H₂

2) Mass of each metal

a) Mass of Cu

The waste was the unreacted copper.

Mass of Cu = 2.5 g

b) Masses of Al and Fe

We have two relations :

Mass of Al + mass of Fe = 10 g - 2.5 g = 7.5 g

H₂ from Al + H₂ from Fe = 6.38 L at NTP

i) Calculate the moles of H₂

NTP is 20 °C and 1 atm.

\begin{array}{rcl}pV & = & n RT\\\text{1 atm} \times \text{6.38 L} & = & n \times 0.08206 \text{ L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times \text{293.15 K}\\6.38 & = & 24.06n \text{ mol}^{-1} \\n & = & \dfrac{6.38}{24.06 \text{ mol}^{-1} }\\\\ & = & \text{0.2652 mol}\\\end{array}

(ii) Solve the relationship

 Let x = mass of Al. Then

7.5 - x = mass of Fe

Moles of Al = x/27

Moles of Fe = (7.5 - x)/56

Moles of H₂ from Al = (3/2) × Moles of Al = (3/2) × (x/27) = x /18

Moles of H₂ from Fe = (1/1) × Moles of Fe = (7.5 - x)/56

∴ x/18 + (7.5 - x)/56 = 0.2652

    56x + 18(7.5 - x) = 267.3

      56x + 135 - 18x = 267.3

                        38x = 132.3

                            x = 3.5 g

Mass of Al = 3.5 g

Mass of Fe = 7.5 g - 3.5 g = 4.0 g

The masses of the metals are Cu = 2.5 g; Al = 3.5 g; Fe = 4.0 g

4 0
3 years ago
How can I identify easliy Amphoteric oxide from basic oxide​
never [62]

Answer:

A general guideline to determine if oxide is acidic, basic, or amphoteric is to use the periodic table. Typically, metals such as Ba form basic oxides (BaO), while nonmetals such as S form acidic oxides (SO3).

8 0
2 years ago
The amount of energy in the bonds of the reactants plus any energy absorbed equals the amount of energy in the bonds of the prod
Vinvika [58]
The amount of energy in the bonds of the reactants plus any energy absorbed equals the amount of energy in the bonds of the products plus any energy <span>given off when the products are formed.

This statement explains and verifies the law of conservation of energy during the chemical reactions. This law states that energy can neither be created nor destroyed, but can change from one form to another.</span>
4 0
3 years ago
Read 2 more answers
What general trend do you observe in the electronegativity values of the elements as you go from left to right on the table? Giv
Zanzabum
From left to right the electronegativity increases
8 0
3 years ago
Read 2 more answers
Other questions:
  • When a warm front passes your location, the temperature rises rapidly. As a result, air density:
    11·2 answers
  • Explain the relationship between chemical bonds and energy in the body.
    13·1 answer
  • Enthalpy change depends on the rate at which a substance is heated or cooled true or false
    11·1 answer
  • if you had a house with bot copper and zinc galvanized iron water pipes, which metal would be oxidized first? Why would this be
    9·2 answers
  • Which of these properties is TRUE for water?
    6·2 answers
  • Write the electron configuration when Sulfur gains two electrons
    10·1 answer
  • A 2.5 mol sample of phosphorus pentachloride, PCl5 dissociates at 160C and 1.00atm to give 0.338 mol of phosphorus trichloride a
    13·1 answer
  • How many Cl atoms are in Zn(ClO3)2?<br> O A. 2<br> O B. 1<br> O c. 3<br> O D. 6
    10·1 answer
  • Find the number of moles of water that can be formed if you have 154 mol of hydrogen gas and 72 mol of oxygen gas.
    14·1 answer
  • Which stage in the life cycle of a plant is represented in this picture?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!