No bots No bots No bots No bots

an object becomes positively charged when it LOSES ELECTRONS.

* protons are positive, so losing protons means that it would be negatively charged.

* gaining electrons would make it more negatively charged.

* gaining neutrons changes nothing because neutrons are neutral.

Answer:

dryhnjkftglqawghbnjsdfmkpohbgfddfvgb

Explanation:

Answer:

Three

Explanation:

Iron  

Oxygen  

Hydrogen

Answer:

A

Explanation:

brainliest pls

Answer: 5) combustion is the answer.

Explanation: Combustion is reaction with oxygen.

The question is incomplete, the complete question is;

Antonio is a silversmith and works with various metals. At the end of the day, he reclaims and separates each metal by using an inexpensive toxic acid though other methods are available. The risk of fire as well as health dangers to Antonio is unknown. What should Antonio do? A) Dispose of the used acid by pouring it down the drain since the government will take care of any environmental issues that come from polluting the water. B) Get a fire insurance policy and make sure to visit the doctor regularly. C) Switch to another potentially less dangerous method of separating each metal. D) Pour it out in back of the studio in the gutter.

Answer:

C) Switch to another potentially less dangerous method of separating each metal.

Explanation:

The importance of safety in manufacturing processes can not be over emphasized. Clearly, Antonio's method of separating each metal holds the potential of a fire outbreak or causing major health problem for Antonio.

The best thing that Antonio can do is to explore other less potentially dangerous methods of separating each metal since there are other available and possibly safer methods of achieving the same end.

Answer:

Here's your Answer

Explanation:

the mass spectrum is the graphical representation of the ion abundance versus the mass to charge of the ions separated in mass spectrometer

Answer:chemical formula of acetic acid is  or

so, molecular mass of acetic acid = 2 × atomic mass of C + 4 × atomic mass of H + 2 × atomic mass of O

= 2 × 12 + 4 × 1 + 2 × 16

= 24 + 4 + 32

= 60g/mol

given mass of acetic acid = 22g

so, no of moles of acetic acid = given mass/molecular mass

= 22/60 ≈ 0.367

so, number of moles of acetic acid is 0.367mol

number of molecules in 0.367 mol of acetic acid = 6.022 × 10²³ × 0.367

= 2.21 × 10²³

Explanation:

Answer:

E. Kinetic

Explanation:

Kinetic Energy. Energy is transferred from one object to another when a reaction takes place. Energy comes in many forms and can be transferred from one object to another as heat, light, or motion, to name a few. For the blue ball to move to the position of the green ball, energy must be given to the blue ball.

Brainlyest please

Answer:

Virus

Explanation:

Hope this helped :)

Answer:

it will be 630

Explanation:

When you count atoms, remember to multiply the coefficient number and the subscript number to find the number of atoms of that element. Examples: ▪ 2H2O. Number of atoms Number of molecules = 2. H-4.

Answer:

dimond is stronger

Explanation:

Answer:

Graphite and Diamond are different because they have different structures. ... However each carbon atom in Diamond has 4 covalent bonds with other Carbons, making it extremely strong and hard. On the other hand, each carbon in graphite is bonded to three carbons, and therefore graphite is formed in layer

Also:

Each carbon atom in a diamond is linked to four other carbon atoms. Each carbon atom in graphite is linked to three other carbon atoms. Diamond is poor conductor of electricity due to the absence of free electrons. Graphite is good conductor of electricity due to the presence of free electrons in its structure.

Explanation:

Hope this helps

Answer:

1.5 × 10³ g

Explanation:

Step 1: Given and required data

Step 2: Calculate the temperature change

ΔT = 28.5°C - 22.0 °C = 6.5 °C

Step 3: Calculate the mass (m) of water

We will use the following expression.

Q = c × m × ΔT

m = Q / c × ΔT

m = 41,840 J / (4.184 J/g.°C) × 6.5 °C = 1.5 × 10³ g

Answer:

I don't know

Explanation:

give me you research

Answer:

C. some substances can move freely across the cell membrane, while others must be transported.

Explanation:

Answer:

1) There are five main symbiotic relationships: mutualism, commensalism, predation, parasitism, and competition.

2) The term mutualism can be simply defined as a relationship in which both species are mutually benefited. This relationship can either be within the species or between the two different species. ... Here ants are the mutualist and acacia trees is the host. The acacia tree provides home and food for the ants.

3) Commensalism is a type of symbiotic relationship in which one species benefits, while the other species is neither harmed nor helped. The species that gains the benefit is called the commensal. ... An example is a golden jackal (the commensal) following a tiger (the host) to feed on leftovers from its kills.

4) Predation is the interaction between organisms in which one organism known as the predator kills another organism which is known as prey. ... Examples of predation are a lion eating deer or a snake eating rats. This results in the transfer of energy from the prey to the predator.

5) Parasitism is generally defined as a relationship between the two living species in which one organism is benefitted at the expense of the other. The organism that is benefitted is called the parasite, while the one that is harmed is called the host. A few examples of parasites are tapeworms, fleas, and barnacles.

6) Competition is a negative interaction that occurs among organisms whenever two or more organisms require the same limited resource. ... For example, animals require food (such as other organisms) and water, whereas plants require soil nutrients (for example, nitrogen), light, and water.

Symbiotic relationships are important because they are a major driving force of evolution. This networking and cooperation among species allows them to survive better than they would as individuals.

Answer:

[tex]\Delta _{fus}H=205J/g=13.03kJ/mol[/tex]

Explanation:

Hello there!

In this case, since the heat of fusion is a property that allows us to calculate the heat involved during the change from solid to liquid (fusion) and is calculated as shown below:

[tex]Q=m*\Delta _{fus}H[/tex]

In such a way, given the heat involved during this process and the mass of copper, we calculate the heat of fusion as shown below:

[tex]\Delta _{fus}H=\frac{Q}{m}=\frac{41000J}{200.g}\\\\\Delta _{fus}H=205J/g[/tex]

Or in kJ/mol:

[tex]\Delta _{fus}H=205\frac{J}{gCu}*\frac{63.546 gCu}{1molCu}\\\\ \Delta _{fus}H=13026.93J/mol=13.03kJ/mol[/tex]

Regards!

Answer:

125 g

Explanation:

The following data were obtained from the question:

Half-life (t½) = 5.3 years.

Original amount (N₀) = 1000 g

Time (t) = 15.9 years.

Amount remaining (N) =?

Next, we shall determine the number of half-lives that has elapsed. This can be obtained as follow:

Half-life (t½) = 5.3 years.

Time (t) = 15.9 years.

Number of half-lives (n) =?

n = t / t½

n = 15.9 / 5.3

n = 3

Thus, 3 half-lives has elapsed.

Finally, we shall determine the amount of Co–60 that is remaining. This can be obtained as follow:

Original amount (N₀) = 1000 g

Number of half-lives (n) = 3

Amount remaining (N) =?

N = 1/2ⁿ × N₀

N = 1/2³ × 1000

N = 1/8 × 1000

N = 0.125 × 1000

N = 125 g

Therefore, the amount of Co–60 that is remaining is 125 g

Answer:

Attached below

Explanation:

Attached below is the required diagrams

From the attached diagram ; Compounds 1 and 2 are achiral ( i.e. stereoisomers aren't possible here )

Compound 3 : ( 1S, 2R ) - 1 - chloro-2-methylcyclopropane

Compound 4: ( 1R , 2S ) - 1- chloro-2-methylcyclopropane

Compound 5: ( 1R, 2R ) - 1 - chloro-2-methylcyclopropane

Compound 6: ( 1S, 2S ) -1- chloro-2- methyl cyclopropane

Answer:

35.453 good luck with your work

Answer:1/4

Explanation:

Answer:

A. Alkene

Explanation:

Alkenes are a class of hydrocarbons characterized by the possession of a carbon to carbon double bond (=) in their structure. This means that C=C is the functional group of alkenes. Alkenes have the general formula; CnH2n.

Based on the structure in the attached image, the structure can be identified to be an ALKENE because it possess a C=C functional group. Specifically, the IUPAC name of the structure is 1,2- dimethyl ethene.

Explanation:

There are 6.022x1023 molecules in 1 mole of SO3 (Avogadro's number) so in 0.25 moles, there are (0.25)(6.022x1023) molecules in the 0.25 moles of SO3. or 1.506x1023 molecules per 0.25 moles of SO3.

There is one atom of sulfur in each molecule of SO3. So there are 1.506x1023 atoms of sulfur in 0.25 moles of SO3.

According to the concept of Avogadro's number there are 0.7525 ×10²³ atoms of sulfur in 0.125 moles of sulfur.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number

In the given example, number of atoms of sulfur are calculated as, Avogadro's number×number of moles, that is,6.022×10²³ ×0.125=0.75275×10²³ atoms

Therefore, there are 0.75275×10²³ atoms in 0.125 moles of sulfur.

Learn more about Avogadro's number,here:

https://brainly.com/question/11907018

#SPJ2

Answer:

A

Explanation:

hope this help sweetie <$

Answer:   -  The moles of solute present in the solution.

-  The volume of solution (in liters) containing the solute.

Explanation:

Answer:

definition-  the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere.

Power your home with renewable energy, Invest in energy-efficient appliances, and Reduce water waste etc.

Answer:

Global warming is an effect on Earth, caused when too much carbon dioxide is present in the air. Carbon dioxide is a green house gas and partially restricts radiation from going back to into space, preventing the Earth from becoming too cold.

However, too much carbon dioxide has the effect of warming the Earth more than normal as it traps more heat on Earth. Thus, the greenhouse effect is enhanced- in short, global warming means that the Earth is much more warmer than normal.

The temperature on Earth has increased by 0.5 °C in the last 100 years. Although this doesn't seem like much, but a small increase can cause a big change. Global warming causes ice sheets to melt and causes sea levels to rise. Due to this, costal flooding frequently happens. In drier seasons, the heat is also more intense becuase of global warming.

Global warming can be reduced by burning less fossil fuels and using solar and wind power instead. Using more public transport could also help reduce carbon dioxide present in the atmosphere, as less vehicles will be releasing carbon dioxide. Reducing the amount of deforestation will greatly help reduce global warming, because trees absorb carbon dioxide from the atmosphere, and through the process of carbon dioxide, they change it into oxygen.