difference between compound and element​

Answers

Answer 1

Answer:

An element is a material that consists of a single type of atom. Each atom type contains the same number of protons. Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.

Explanation:

I hope it helped you


Related Questions

A student is measuring the volumes of nectar produced by a flowering plant for an experiment. He measures nectar from 50 flowers using a graduated cylinder that measures to the nearest millilitre (mL). Which statement describes a change that can help improve the results of his experiment?
A.) His measurements will be more precise if he takes measurements from an additional 100 flowers. B.) His measurements will be more accurate if he uses a graduated cylinder that measures to the nearest tenth of a mL. C.) His measurements will be more precise if he uses a graduated cylinder that measures to the nearest tenth of a mL. D.) His measurements will be more accurate if he takes measurements from an additional 100 flowers.
NEED HELP NOW PLEASE!!!

Answers

Answer:

His measurements will be more precise if he uses a graduated cylinder that measures to the nearest tenth of a mL.

Explanation:

His measurements will be more accurate if he uses a graduated cylinder that measures to the nearest tenth of a mL. The correct option is B.

The closeness of a measurement to the real or recognised value is referred to as accuracy.

The learner can achieve more exact measurements and eliminate the possibility of rounding mistakes by using a graduated cylinder that measures to the closest tenth of a millilitre.

This enhanced precision will help to improve measurement accuracy. Taking measurements from more flowers (options A and D) will expand the sample size but will not enhance accuracy unless the measuring device is updated.

Option C recommends improving precision but does not address accuracy.

Thus, the correct option is B.

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What is coronavirus
Why do you need to be cautious

Answers

Answer:

IT IS CORONAAAAAAAAAAAAAAAAAAAAA

Answer:

coronavirus is a lung disease, it makes it so that you have a fever, cough, trouble breathing, mild headaches, and sometimes even nausea. you should be cautious because if your at high risk your gonna have trouble recovering from it. wearing a mask could help protect others from the spread of coronavirus. others wearing a mask prevents you from the spread of coronavirus. if you do catch it, make sure you see your doctor and isolate yourself for two weeks to a month and try not to go out as much.

In the reaction BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaCl (aq), what phases are the reactants in before the reaction?
Question 4 options:

A)

BaCl2 is a liquid, and Na2SO4 is a gas.

B)

BaCl2 is a solid, and Na2SO4 is in aqueous solution.

C)

Both reactants are gases.

D)

Both reactants are in aqueous solution.

Answers

D.

both are stated to be in aqueous solutions by the (aq)

Answer:

D. both are stated to be in aqueous solutions by the (aq)

Explanation:

help please!! will reward brainliest ​

Answers

Answer:

C

Explanation:

just did it and got good luck


A sample of seawater weighs 250 g and has a volume of 173 ml. What is the density of seawater?

Answers

Answer:

The answer is 1.45 g/mL

Explanation:

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

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

From the question

mass of seawater = 250 g

volume = 173 mL

It's density is

[tex]density = \frac{250}{173} \\ = 1.4450867052...[/tex]

We have the final answer as

1.45 g/mL

Hope this helps you

An atom with 17 protons, 18 neutrons, and 18 electrons will have a charge of

Answers

Answer:

It's atomic mass is 35

Explanation:

charge will be -1

This is because there is 1 more electron than there is protons, and since protons are positively charged and electrons are negatively charged, the charge ends up being negative as well.

A hydrogen electron is elevated from level 1 to level 2. Another electron is elevated from level 2 to level 4. The transition requiring the greatest energy change is

Answers

Answer:

the answer is level 2 to level 4

Explanation:

2. Which of the following statements correctly explains the difference between a theory and a scientific law?
O Scientific laws are not as well proven as theories.
O Scientific laws are statements about observed experimental facts, while theories are explanations of natural phenomena.
Theories are not as well proven as scientific laws.
O Scientific laws explain natural phenomena while theories are just guesses.

Answers

Answer:

pretty sure its Scientific laws are statements about observed experimental facts, while theories are explanations of natural phenomena.

The statement that correctly explains the difference between a theory and a scientific law is as follows:

Scientific laws are statements about observed experimental facts, while theories are explanations of natural phenomena.

Thus, the correct option is B.

What is Scientific theory?

A Scientific theory may be defined as a well-explained fact that is significantly associated with the natural world that has been constructed through the utilization of the scientific method, and which brings together many facts and hypotheses.

A Scientific theory is based on observation. It is proven but still testable in nature in order to derive evidence. It generally does not possess mathematical statements and deductions. Theories are explained on nature as well as natural phenomena.

Scientific law is based on unalterable facts or those facts that remain constant. It is proven as well as contains evidence to support the claim. It definitely possesses mathematical statements and deductions.

Therefore, the correct option for this question is B.

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Which type of forest consists of cone-
bearing evergreen trees that often
grow very tall, but provide little
canopy?
A. Coniferous Forest
B. Deciduous Forest
C. Tropical Rainforest
D. Grassland

Answers

Answer: A, Coniferous Forest.

WILL MARK BRAINLIEST

8. When the numbers 552. and 38.14 are added the result is:
a) 591
b) 590
c) 5.90 x 10^2
d) 589

Answers

Answer:

b) 590

Explanation:

HELP PLEASE!!
Calculate the mass in grams of an object whose volume is 67.8 mL and whose density is 7.25 g/mL

Answers

Answer:

The mass of the object would be 491.55g/mL. Hope this helped! :)

Explanation:

D= 7.25g/mL                                                           M=D•V

V= 67.8mL

M=7.25g/mL•67.8mL

M= 491.55g

How much copper is in 3.79 g of copper

Answers

Answer:

3.79 g

Explanation:

3.79 g of copper is how much it is

The head of a pin is 1.5 × 10-3 m in diameter. If 1.136 × 107 atoms of oxygen can fit across the head of a pin, what is the atomic radius of oxygen?

Answers

About five million million hydrogen atoms could fit. Some factors would affect that number like the area of the head and the size of atoms (as well as attractions between atoms). Some atoms are larger than others.

If 1.136 × 10⁷ atoms of oxygen can fit across the head of a pin whose diameter is 1.5 × 10⁻³ m, the atomic radius of oxygen would be 6.60 × 10⁻¹¹ m.

The head of a pin is 1.5 × 10⁻³ m in diameter. If 1.136 × 10⁷ atoms of oxygen can fit across the head of a pin, the diameter of each oxygen atom would be:

[tex]\frac{1.5 \times 10^{-3}m }{1.136 \times 10^{7}atom} = 1.32 \times 10^{-10}m/atom[/tex]

The atomic radius of oxygen would be half of its diameter.

[tex]\frac{1.32 \times 10^{-10} m}{2} = 6.60 \times 10^{-11} m[/tex]

If 1.136 × 10⁷ atoms of oxygen can fit across the head of a pin whose diameter is 1.5 × 10⁻³ m, the atomic radius of oxygen would be 6.60 × 10⁻¹¹ m.

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Based on what you know about conductivity and the periodic table, rank the elements in order from most conductive to least conductive.

Answers

Answer: chromium, germanium, iodine

Explanation:

Answer:

Chromium, Germanium, Iodine

Explanation:

edge


What is the speed of a jet plane that flies 78500 km in 10.5 hours (in km/hr)?
Do not use decimal

Answers

S = d/t

S = 78500/10.5

S = 7,476 Knots

a liquid that occupies the volume of 3.23 L has a mass of 3.188 kg what is the density of this liquid in kilograms to liters

Answers

Answer:

0.97 kg/l

Explanation:

Identify the substance oxidized and the substance reduced in the following chemical equation:zn(s)+AgNO3(aq)=Zn(No3)2+2Ag(a)​

Answers

Answer:

Explanation:

zn is oxidized because its oxidation number is increased from zero in zn to +2 in zn(No3)2

Ag is reduced because its oxidation number is reduced from +1 in AgNo3 to zero in Ag

oxidation number of zn(s) is zero while the oxidation number of zn in zn(No3)2  is

zn(No3)2=x+(5*2)+(-2*6)=x+10-12=x-2

x-2+2=2

x=2

the oxidation of Ag in AgNo3

AgNo3=x+5+(3*-2)=x+5-6=x-1

x-1+1=1

x=1 while the oxidation number of Ag is zero

so zinc is oxidized and silver (Ag) is reduced

3. A gold ring has a mass of 67.0 grams. When
placed in a graduated cylinder containing 10 ml of
water, the water rises to 13.47 ml. Calculate the
density of the ring.
I

Answers

Answer:

The answer is

19.3 g/mL

Explanation:

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

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

From the question

mass = 67 g

Volume of ring = new volume of water - original volume of water

Volume = 13.47 - 10 = 3.47 mL

Substitute the values into the above formula and solve

That's

[tex]Density = \frac{67}{3.47} \\ = 19.308357[/tex]

We have the final answer as

19.3 g/mL

Hope this helps you

What’s is the specific gravity of turpentine

Answers

0.86 to 088, hope this helps :)

What is the percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution?
Please help​

Answers

Answer:

The percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution is 4.61 %

Explanation:

The mass percentage of a solution is a measure of concentration that indicates the number of grams of solute that there are per 100 grams of solution.

The percent by mass is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100 to give a percentage.

[tex]percentage by mass=\frac{solute mass}{solution mass} *100[/tex]

In this case:

solute mass: 30 gsolution mass: 650 g

Replacing in the definition of percent by mass:

[tex]percentage by mass=\frac{30 g}{650 g} *100[/tex]

Solving:

percent by mass= 4.61 %

The percentage by mass of a solution with 30.0g salt dissolved in water to make 650.0g 0f solution is 4.61 %

How does the interior of the earth affect the exterior of a volcano? Explain. ​

Answers

Answer:

it erupts

Explanation:

How can a substance change from one state of matter to another?

Answers

Answer:

heated or cooled

Explanation:

Matter can change from one state to another if heated or cooled.

Answer:

Many things can change a substance from one state to another. These things include pressure, temperature, frequency, and many more.

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:

The sum of two integers is -4. Can the two integers both be positive?

Answers

Answer: No.

Explanation: A negative integer can only be made with 2 negative integers or 1 positive and 1 negative integer.

What is the Thermal Energy?​

Answers

The answer is removed hope this helps!

Answer:

Thermal Energy is a certain type of energy that Heats.

Explanation:

"Thermal" is derived from "Thermo" which means heat.

1.) What are the chemical properties of matter?

Answers

Answer:

Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust. Reactivity is the ability of matter to react chemically with other substances.

Explanation:

Your cute btw :)

Describe how molecular motion and distance between molecules change as ice is heated to become a liquid and then a gas

Answers

Answer:

Described in the explanation section

Explanation:

Ice is the solid phase of water and this phase, the water molecules usually have very little energy and therefore can't detach from each other. This is because the water molecules are closely packed together in a regular arrangement normally called lattice.

Now, when the ice is heated to become a liquid, the energy of the water molecules increases and thus some of them will have enough energy to overcome the intermolecular forces that had been keeping them closely packed in the ice phase. This will then make the water molecules to move further apart thereby forming liquid water.

Now, when the molecules are heated further, the liquid water will now turn into water vapor, which is the gas phase of water. The molecules in this gas phase will have more energy than in the liquid phase because the average distances between each of them will be much larger than the size of the molecules themselves.

How do you know if a energy level is full

Answers

Answer:

By checking Level.ok!!

find the density . mass is 12.52 g and the volume is 20.98 mL​

Answers

Answer:

0.5968 g/mL

Explanation:

To calculate density:

density

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

Therefore,12.52g divide by 20.98mL is 0.5968g/mL

In order to find density you divide by mass and volume. Giving you a 0.596

Some chemical reactants are listed in the table below. Complete the table by filling in the oxidation state of the highlighted atom.

Answers

Answer:

1. Cu = +2

2. O = – 2

3. C = +2

4. N = 0

Explanation:

Note:

A. The oxidation state of oxygen is always – 2 except in peroxides where it is – 1.

B. The oxidation state of Hydrogen is always +1 except in metallic hydrides where it is – 1.

Now let us solve the question given above.

1. CuO = 0 (ground state)

Cu + O = 0

O = – 2

Cu + (– 2) = 0

Cu – 2 = 0

Collect like terms

Cu = 0 + 2

Cu = +2

2. H2O = 0 (ground state)

2H + O = 0

H = +1

2(1) + O = 0

2 + O = 0

Collect like terms

O = 0 – 2

O = – 2

3. CO = 0 (ground state)

C + O = 0

O = – 2

C + (– 2) = 0

C – 2 = 0

Collect like terms

C = 0 + 2

C = +2

4. N2 = 0 (ground state)

2N = 0

Divide both side by 2

N = 0/2

N = 0

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