An ionic bond for calcium and oxygen is CaO. If an oxygen ion has a charge of two negative, what is the charge for calcium? +2 –1 +1 –2

Answers

Answer 1

Answer:

+2

Explanation:


Related Questions

describe how changing the particles changed the atom

Answers

bonds between atoms break and new ones form and energy is either given out or taken in

Changing the particles changes the atoms by converting it to a new substance through bond change.

During a chemical reaction changes occurs in the atoms of an element due to the formation or breaking of bonds.

There is either loss or gain or sharing of atoms between two elements reacting together.

Bonds between atoms break and new ones form and energy is either given out or taken in.

This type of reaction leads to the formation of new substances made up of a new combination of atoms and a different configuration of electrons.

Therefore, because various changes occurs during a chemical reaction, changing the particles changes the atoms by converting it to a new substance through bond change.

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how to calculate molecular mass?

Answers

you use amount of molecules multiplied by atomic mass

How many electrons does maganese 55 have?

Answers

Answer:

Maganese 55 has 25 electrons.

Hope this helps you!

Explanation:

how many grams are equal to 413 kg

Answers

Answer:

413,000 grams

Explanation:

Answer:

413,000

Explanation: That's because 1 kg equals to 1,000 grams.

is nonflammable a physical or chemical property

Answers

physical property

The change of one type of matter into another type (or the inability to change) is a chemical property. Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion.
its a physical peoperty

Explain why the design of the bird's nest in the picture provides good insulation for the eggs.

Answers

Answer:

First, the lining may consist of loose, smaller bits of the same materials that have been incorporated into the latticework of the nest. These finer materials are utilized to shed water, deter pests, conceal the eggs from predators, insulate, and cushion them. ... They also serve to insulate and cushion the eggs.

Explanation:

rabbit is one of the sweetest animal on world ....change it into positive degree​

Answers

Answer:

rabbit is one of the sweet animal

in the world

A length of wood has a labeled length value of 2.50 meters. You measure its length three times. Each time you get the same value: 2.35 meters. What is the percent error of your measurements? *

Answers

Answer:

6%

Explanation:

Actual length of the wood is 2.5 m

Observed length of the wood is 2.35 m

We need to find the percent error of your measurements. The formula of the percentage error is given by :

[tex]\%=\dfrac{|\text{observed-actual}|}{\text{actual}}\times 100\\\\\%=\dfrac{2.5-2.35}{2.5}\times 100\\\\\%=6\%[/tex]

Hence, the percentage error is 6%.

How are compound, elements, and mixure different

Answers

Explanation:

Compound: a substance that is made up of more than 1 type of atom bonded together Example: H2O

Mixture: combination of two or more elements or compounds not chemicaly bonded together. example: Sugar and salt in one container

elements pure substance of an atom. Example: hydrogen

Please help me with this question.

Answers

Answer:

12?

Explanation:

Answer:

8

Explanation:

haploid is half

PSYCHOLOGY All of the following physical reactions occur when our fight-or-flight response is triggered except __________. A. dilating pupils B. increasing heartbeat C. increasing digestion D. increasing perspiration

Answers

Answer:

C.) increasing digestion

Explanation:

hope this helps:)

Answer:

C.  increasing digestion

Explanation:

What is the electron configuration for an atom of tin in the ground state?

Answers

Answer:

The ground state electron configuration of ground state gaseous neutral tin is [Kr]. 4d10. 5s2. 5p2 and the term symbol is 3P0.

URGENT : how do the electrostatic forces between electrons influence their orbital spin?

Answers


Oppositely charged particles attract each other, while like particles repel one another. Electrons are kept in the orbit around the nucleus by the electromagnetic force, because the nucleus in the center of the atom is positively charged and attracts the negatively charged electrons.

hope this helps

Convert 35 mL to cm3. 1 mL = 1 cm3

Answers

it’s still 35cm3
mark me brainliest

How many electrons does the Ca^2+ ion possess

Answers

Answer:

18 electrons

Explanation:

Answer:

18 electrons

Explanation:

Ca has 20 electrons. Ca^2+ has 18 electrons

how can an item with a lower mass have a higher weight than an item with a higher mass?

Answers

Answer:

probs has to do with the size of the object

Explanation:

How do solve the uncertainly of a number?? plz help me

Answers

Answer:

How do solve the uncertainly of a number??

Explanation:

If you're adding or subtracting quantities with uncertainties. You add the absolute uncertainties. If you're multiplying or dividing, you add the relative uncertainties. If you're multiplying you multiply absolute uncertainties by the same factor, or do nothing to relative uncertainties.

Answer:

If you are taking a with power of a number with an certaintly ,you multiply the realtive uncertainty by number in the power .

Will give Brainlest for correct answers
How is kinetic energy affected by temperature

Answers

Answer:

Temperature affects the kinetic energy in a gas the most, followed by a comparable liquid, and then a comparable solid. The higher the temperature, the higher the average kinetic energy, but the magnitude of this difference depends on the amount of motion intrinsically present within these phases

Explanation:

I just know lol

The higher the temperature, the higher the average kinetic energy, but the magnitude of this difference depends on the amount of motion intrinsically present within these phases.

If one end of an iron bar is heated, what causes thermal energy to transfer to the other end? a radiation b conduction c heat of fusion d convection

Answers

Answer:

Option B:

Conduction

Explanation:

Conduction is the transfer of heat from one molecule to another between two solids that are in direct contact with each other. For the conduction of heat to occur, the medium involved must be solid. This is because the molecules of solids are closely packed together and they cannot freely move about. The heat flowing through them can easily be passed on from one molecule to the other until it reaches all the parts of the object. This is exactly what will happen to the iron bar. Thermal energy from one end of the bar will get transferred between the molecules of the iron bar until it reaches the other end.

Convection on the other hand involves the transfer of heat through a liquid medium.

Radiation involves teh transfer of heat in a vacuum.

Answer:

b) conduction

Explanation:

1. How many molecules are in 2.40 moles of H2O?

Answers

Answer:

There arr 1.5*1024 molecules in 2.40 moles of H2O.

In what circumstance would the complete and net ionic equations for a reaction be identical?

Answers

Answer: Complete ionic equations dissociate all aqueous solutions into ions. Net ionic equations show the change that occurs in chemical reactions and do not show spectator ions that are the same in reactants and products. (b) If no spectator ions were present then complete and net ionic equations would be identical.

Explanation:

Express a mass of 0.056 mg in grams.
Answer in units of g.

Answers

Answer:

0.000056g

Explanation:

1 mg = 0.001 g

Or if it helps move your decimal sign over left 3 places.

Igneous rock can be changed into which type of rock through the application of heat and pressure?

A. metamorphic rock

B. foliated igneous rock

C. clastic sedimentary rock

D.non-foliated igneous rock

(Pls help me)

Answers

Answer:

A) metamorphic rock

Explanation:

Granite is an igneous rock that forms when magma cools slowly underground. When granite is exposed to heat and pressure it changes into a metamorphic rock called gneiss

The teacher was not in the room yet. Randy began opening containers of chemicals, touching them with his hands. His cheek itches so he rubbed it. Explain how Randy was not acting safety in the the laboratory.

I know the answer I just don’t know how to word it. Please help. Due by 11:59 tonight

Answers

Answer:

Randy went into the classroom without the teacher being present. He opened  containers of chemicals without the teacher's consent. Randy is making contact with the chemicals on his skin.

I hope this helps! I haven't done lab science in a while so I'm trying to remember the safety precautions.

Randy went into the classroom without the teacher being present and opened  containers of chemical, making contact with chemicals on skin leads to skin reaction.

So Randy should follow the lab safety rules while entering into lab.

What are the important lab safety rules?

After entering lab wear apron and gloves along with safety goggles if working with any hazardous or infectious substance.

Fully aware about the hazards of the materials, properly trained to handle lab equipment, chemicals should be adequately labelled.

Taste or smell chemicals are prohibited, never pour already stored chemicals, chemical hygiene plan should be developed for specific hazards.

Avoid to adopt un-tested and unauthorized experimentation, Clean up all chemical spill, Laboratory induction should be carried out .

Avoid storage of any edible items in the refrigerator along with lab chemicals and specimens, clean the work station after completing experiment and sterilization should be done before starting experiment.

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What is the difference between the dependent variable and the independent variable in an experiment?

Answers

Answer:

An independent variable is the cause. Its value is independent of other variables in your study. A dependent variable is the effect. Its value depends on changes in the independent variable

Explanation:

Variables are the factors or the numbers used as a quantity. The dependent variables are conditional, and the independent variable is the cause that affects the result.

What are dependent variables and independent variables?

The independent variable of an experiment is the data that is the cause of the experimental design. Its value and result do not depend on other factors and conditions. These values are manipulative and are set by the researcher.

The dependent variables, on the other hand, vary based on the other factors and variables and are the effect that is based on the response and the outcome of the other variables. It is the tested or the measured value.

Therefore, the independent and dependent variables differ based on cause and effect.

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A cylinder with 10 mL of coconut oil has a mass of 9.3 g. What is the density of the oil? Round to the nearest hundredth. ​

Answers

Answer:

0.93 grams per milliliter

Explanation:

Density is the division of mass by volume. It is how "hefty" an object is; for example, wood isn't very "hefty" but metal is. The density is measured in mass over volume, so it is 9.3/10. After applying units, it is 0.93 grams per milliliter.

1)petroleum and natural gas are formed in the__________
2)_______ refers to the things that exists freely in nature or human use
3) during the ____ period the earth was covered with swampy forest's
4)-------- is the mixture of hydrogen, methane, carbon monoxide, and other gases
5)natural gas mainly consists of_____
6)_____are the chemicals derived from petroleum and natural gas
7) the process of refining of petroleum is carried out in refineries and is called _____
8) _____ is used to generate power and to manufacture other fuels like coke and coal tar​

Answers

1. In the remains of organisms such as plants and algae.
2. Air, peace of mind know knowleged and water
3. The Carboniferous
4. Is a colorless , odorless gass that is very flammable.

Which of these elements have just one valence electron?

Answers

Answer:

Only Hydrogen and Group 1 elements have 1 valence electron

Explanation:

the valence number of electrons is the group number in the periodic table. So, the group 1 atoms( along with hydrogen) have 1 outer-shell electrons [valence electrons]

Mass = 35g Volume = 7cm³ What is the Density?​

Answers

Answer:

The answer is

5.0 g/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass = 35 g

volume = 7 cm³

The density is

[tex]density = \frac{35}{7} \\ [/tex]

We have the final answer as

5.0 g/cm³

Hope this helps you

any matter that does not have a definite shape or a definite volume is an

Answers

gas. gases have no definite volume or shape.
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