Which of these following have a positive charges

Answers

Answer 1

Answer: Talking about ions, a cation has a positive charge. That means a positive charge is gained by an atom that gives out electrons.

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The concentration of O-Nitro Phenol is proportional toSelect one:a. the concentration of b-galactosidase b. the concentration of Luria Brothc. the concentation of glucosed. the concentration of lactosee. the concentration of ONPGFeedback
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Click on the diagram to choose which atom is more reactive.

What should be done if a chemical is poured from an original container into another container not intended for immediate use?

Answers

Answer:

Label

Explanation:

You need to search if the chemical need a glass or plastic container. Also if the chemical need to be in a clear or dark container that can protect it from light. Also if need to be a certain temperature, for example, if need to be in the fridge or can be at room temperature.

Most important is that you need to label with the name, formula, date, and if you have the number of lot and the expiration date.

A chemical reaction in which compounds break up into simpler constituents is a _______ reaction.a. combination
b. decomposition
c. double replacement
d. substitution

Answers

the awnser to ur question is B

B. Decomposition, I remember reading this in my student workbook. Hope this helped!

How many moles of aluminum oxide can be made if 5.23 mol Al completely react

Answers

Answer:

2..615moles of Aluminium oxide

Explanation:

4Al + 3O2 -------> 2Al2O3

(5.23mol Al)×(2molaAl2O3) /(4molAl)

2.615moles of Aluminium oxide

4Al + 3O2 --> 2Al2O3

(5.23mol Al)(2mol Al2O3/4mol Al) = 2.62mol Al2O3

Which element is rolled into a foil found and used in your kitchen?

Answers

The question is asking to determine what kind of element is rolled into a a foil and used in you kitchen, and base on my own research and also in understanding the elements, I would say that the answer would be Aluminum. I hope you are satisfied with my answer and feel free to ask for more

aluminium ........................

For the reaction ?H2 +?O2 → ?H2O, what is the maximum amount of H2O (18.0153 g/mol) which could be formed from 9.43 g of H2 (2.01588 g/mol) and 12.98 g of O2 (31.9988 g/mol)? Answer in units of g.

Answers

2H2 + O2 →2H2O
This is a limiting reactant problem in which you need to figure out which reactant is the limiting reactant. You can usually look at the information given and see that hydrogen has the smaller amount of mass used, but it is always good to check that assumption through stoichiometry:
(9.43g H2/2.02g/mol)(2mol H2O/2mol H2)(18.02gH2O/1mol H2O)= 84.1g H2O produced from 9.43g of H2

(12.98g O2/32.00g/mol O2)(2mol H2O/1mol O2)(18.02gH2O/1mol H2O)= 14.6g H2O

So my assumption that hydrogen makes the smaller amount of water is wrong since oxygen (it is the limiting reactant) created the smaller amount of water with 14.6g, so 14.6g is the maximum amount of water that can be formed

A light twig is barely floating on the surface of water. What will most likely happen to the twig if a drop of dishwashing detergent is added near it?It will float easily because soap disrupts the intermolecular forces of water.It will sink because soap increases the intermolecular forces of water.It will sink because soap disrupts the intermolecular forces of water.It will float easily because soap increases the intermolecular forces of water.

Answers

Answer;

- It will sink because soap disrupts the inter-molecular forces of water

Explanation;

-A light twig is barely floating on the surface of water. if a drop of dish washing detergent is added near it then it will sink because soap disrupts the inter- molecular forces of water.

-The twig was initially floating due to the force of surface tension created by the inter-molecular forces between water molecules. When soap is added to the water, the twig will be driven to sink by the disruption of the water's surface tension. This is because soap is a surfacant that is amphipathic and thus disrupts the inter-molecular forces between water molecules that are responsible for surface tension.

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What are a few examples of what energy is?

Which statement describes a chemical property of the element magnesium?(1) Magnesium is malleable.(2) Magnesium conducts electricity.(3) Magnesium reacts with an acid.(4) Magnesium has a high boiling point.