1. Aluminum foil reacts with aqueous copper (II) chloride ( Type of Reaction:

What is the only reaction type you have learned about that starts with only 1 point

LenaWriter [7]

Decomposition starts with one compound on the reactants side.

5 0

4 years ago

The frequency of a signal is found to be 6389 with an uncertainty of 436 Hz. To the correct number of significant digits, it sho

vlabodo [156]

Answer:

i hope it work

Explanation:

as

accurate reading range = reading ± uncertainty

so you have to say about accurate reading that its,lies in range

=(6389-436) →(6389+436)

=5953→6825

and the correct number of significant would be 3

8 0

4 years ago

When does long-term carbon cycling occur? Select all that apply.

aev [14]

Answer:

The long-term carbon cycle is the main controller of the concentration of atmospheric carbon dioxide and (along with the sulphur cycle) atmospheric oxygen over a geological timescale1,2. It can be represented succinctly by the generalized reactions3,4: Figure 1: A model of the long-term carbon cycle

A.When the animals die, they decompose, and their remains become sediment, trapping the stored carbon in layers that eventually turn into rock or minerals. Some of this sediment might form fossil fuels, such as coal, oil, or natural gas, which release carbon back into the atmosphere when the fuel is burned.

B.Cells use oxygen to "burn" food for energy. Water and carbon dioxide are produced as wastes. The cells in both plants and animals perform respiration. Carbon dioxide is also released into the atmosphere when fuels are burned, such as in automobiles or factories

Cells use oxygen to "burn" food for energy. Water and carbon dioxide are produced as wastes. The cells in both plants and animals perform respiration. Carbon dioxide is also released into the atmosphere when fuels are burned, such as in automobiles or factories

c.During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose

d.Fossil fuels are made from decomposing plants and animals. These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy. Coal, oil, and natural gas are examples of fossil fuels.

7 0

3 years ago

Which of the following lists elements in order of increasing malleability?

hodyreva [135]

Malleability is the property due to which substances tend to hammered into thin sheets when pressure is applied. Malleability is observed in metal as the metal atoms are bound by metallic bonds. The layers of metal atoms can roll over each other without breaking the metal bond when pressure is applied. In the periodic table malleability decreases as the metallic nature decreases. Among the given metals Al is the most metallic element, followed by Zinc an Carbon is a non metal. Therefore, the order of increasing malleability will be C, Zn, Al

8 0

3 years ago

Read 2 more answers

How many moles of MgCl2 will be produced from 65.0g of Mg(OH)2 , assuming HCl is available in excess

Butoxors [25]

Answer:

1.12 moles of MgCl₂

Explanation:

Given parameters:

Mass of Mg(OH)₂ = 65g

Unknown:

Number of moles of MgCl₂ = ?

Solution:

To solve this problem, obtain a balanced reaction equation first;

Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O

From the reaction above, this is a typical neutralization process in which an acid reacts with a base to produce salt and water only.

Let's proceed; the reactant in excess is the HCl, acid. The other reactant is the Mg(OH)₂ and it must be the limiting reactant. A limiting reactant is one that is given in short supply and determines the extent of the reaction.

Find the number of moles of Mg(OH)₂;

Number of moles = $\frac{mass}{molar mass} \\$

Molar mass of Mg(OH)₂ = 24 + 2(16 + 1) = 58g/mol

Number of moles = $\frac{65}{58}$ = 1.12moles

The balanced reaction equation shows that;

1 mole of Mg(OH)₂ gives 1 mole of MgCl₂

1.12 mole of Mg(OH)₂ will produce 1.12 moles of MgCl₂

6 0

3 years ago