DO the following conversion ​

Answer:

true.

Explanation:

Zn(s) + 2HCI(aq)=H2(g)+ZnCl2(g)

Answer:

Polystyrene is a versatile plastic used to make a wide variety of consumer products.

Explanation:

Answer:

polystyrene, a hard, stiff, brilliantly transparent synthetic resin produced by the polymerization of styrene. Styrene is obtained by reacting ethylene with benzene in the presence of aluminum chloride to yield ethylbenzene.

Explanation:

in other words its a plastic

Answer:

b is right answer because xylem provide nutrition and water to the plant

Answer:

The mixture has no fixed composition.

To form a mixture energy is neither produced nor evolved.

The mixture has no fixed melting points and boiling points.

the Mixture retains the properties of its components.

Components of mixtures can be separated by simple physical methods.

Heat can travel from one place to another in three ways: Conduction, Convection and Radiation.

Answer:

2 Hydrogen atoms and 1 Oxygen atoms makes water

Explanation:

Hope this helps^^

Answer: Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms,

Explanation: i hopes it helps :)

To determine the molecules of butane we can either use multiple steps or use a combined equation based on the following formulas:

Molecules of butane = Moles × Avogadro's Number

Moles of Butane = Mass ÷ Molar Mass

Mass of Butane = volume × Density

∴ Molecules of butane

   = [(volume × Density) ÷ Molar Mass]  × Avogadro's Number

   = ([(25.0 ml × 0.6011 g/ml) ÷ 58.12 g/mol] × (6.022 × 10²³ molecules/mol))

   = 1.557 × 10²³ molecules

Answer:

The answer to your question is c. H2O

Explanation:

a. CaCO3 ----> Calcium Carbonate is obviously not a binary compound because it contains more than two elements.

b. CuSO4 ----> CuSO4 stands for copper(II) sulfate. Sulfate is the polyatomic ion SO4 -2.

c. H2O ----> Binary molecular compounds are composed of only two elements. Examples are H2O, NO, SF6 etc.

d. Pb(NO3)2 ----> Lead(II) nitrate is an inorganic compound with the chemical formula Pb(NO3)2.

I hope this helps and have a great day!

Answer:

Answer:

(D)

Explanation:

In the reaction between vinegar and baking soda, the reactants are vinegar (acetic acid) and baking soda (sodium bicarbonate). The products are sodium acetate, water, and carbon dioxide gas.

Answer:

Sulfur is an element is Period 3 with 6 valence electrons.

Answer:

You can measure the displacement when the object is placed in a certain volume of water.

Answer:

A) Refraction , this is the correct answer.

Hope it helps!!

Answer:

A refraction. I'm an electrician building aspects they put circular cones through the building and where they bend they have refractors and so you can have a completely closed off building and the light will come through from the rooftops through these tubes and the light been through refractors to make it look like you have a moonroof

Answer:

Mark me brianliest plzzzzzzzzzzzz (puppy eyes) plz

Explanation:

22,400 Kelvin

22,400 KelvinSpica A and B are both classified as B-type stars and are very hot, with surface temperatures of 22,400 Kelvin and 18,500 Kelvin respectively. The primary component has a luminosity of some 12,100 Suns while the secondary shines with the power of 1500 Suns.

Solutes dissolve in solvents to form a solution. A saturated solution contains just as must solute as it can normally hold.

The solvent in the coffee solution is water and the rest of the chemicals dissolved in the solvent are called solutes. A solution is formed when a solute is dissolved in a solvent.

A saturated solution contains just as much solute as it can normally hold at a particular temperature while a supersaturated solution contains more solute than it can normally hold at a particular temperature.

A polar molecule contains covalent bonds between atoms having an electronegativity difference above 0.5. Such molecules are polar as electrons of the bond are drawn closer to the atom that is more electronegative.

According to Avogadro's law; 6.02 × 10^23 particles is referred to as one mole of particles.

A strong acid has a pH that may range from 0 - 3. A strong base has a pH of around 10 - 14. Water is a neutral substance and has a pH of 7.

From the information provided;

Number of moles of acid = 0.002 moles

Volume of solution=  2 L

Concentration of solution = number of moles/volume = 0.002 moles/2L = 0.001 M

pH = - log[H^+]

pH = - log[0.001 ]

pH = 3

From;

pH + pOH = 14

pOH = 14 - pH

pOH = 14 - 8.5

pOH = 5.5

pOH = - log[OH^-]

[OH^-] = Antilog[-5.5]

[OH^-] = 3.2 × 10^-6 M

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When you rub an inflated balloon on your head and it makes your hair stand up, the force that makes the hair stand up is known as static electricity.

When the balloon is rubbed on the head, electrons from the hair atoms move into the balloon, thus making the balloon to be negatively charged and the hair positively charged due to loss of electrons.

Unlike charges attracts. Thus, when you try to pull the balloon away slowly, the positively charged hair and the negatively charged balloon will attract each other and this is usually what makes the hair stand up.

More on static electricity can be found here: https://brainly.com/question/24160155

Answer:

static electricity

Explanation:

this is because there is an imbalance between negative and positive charges

when you keep on rubbing, a negative charge is created which is carried by electrons.

when you pull the balloon away slowly, the opposite charges attract to each other which makes your hair attract to the balloon

Answer:

Lung function decreses at a faster rate for young people (last answer choice)

Explanation:

Answer:

insta

Explanation:

Zak_1231 follow me

Explanation:

I'm sorry if this doesn't answer this correctly but solid liquid solider solid liquid/solid

Answer:

D

Explanation:

Heterogeneous mixture is a mixture of non-uniform composition & in which the components can be easily identified

Answer:

Soil

Explanation:

Soil is made up of many things (therefore it's not pure) and does not appear to be uniform; it does not look the same throughout. Therefore it is heterogeneous.

Answer:

Mg + 2H2O → Mg(OH)2 + H2, is normally sluggish, but it becomes reasonably rapid when a milled composite of powdered magnesium metal and powdered iron (1−10 mol %) is used with sodium chloride solutions.

Density = mass ÷ volume

            = 217.0 g ÷ 24.3 cm³

            = 8.93 g/cm³

Answer:

nala

simba

Explanation:

Answer:

5. An element's mass number tells the number of protons in its nucleus.

Atomic

6. Negatively charged particles in an atom are called electrons.

True

7. The cloud model of the atom describes the location of electrons as specific orbits around the nucleus.

Bohr

8. Atoms with the same number of protons but different numbers of neutrons are called isomers.

Isotopes

9. The sum of the protons and neutrons in an atom is called the atomic number.

Mass

10. An object that helps explain ideas about the natural world is called a model.

True

11. Mendeleev arranged his periodic table in order of increasing atomic number.

Mass

12. The rows in the periodic table are called periods.

True

13. Moving across the periodic table from left to right, one finds, in order, metals, then gases, then nonmetals.

Metalloids

14. Another name for a period is a family.

Group

15. On the periodic table, elements in the same column have similar properties.

True

Explanation:

Answer:

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

PE = 3 × 9.8 × 12.5 = 367.5

We have the final answer as

Hope this helps you

Answer:

electrons form the atoms f one material may move to the atoms of the other material. The movement of electrons from one atom to another changes the charge of the atoms. When an atom loses electrons, it is left with more protons than electrons, so it then has a positive charge. when an atom gains electrons, it has more electrons than protons so its charge is negative.

Explanation:

Answer:

D) 10.812

Explanation:

Given:

The two isotopes of boron (B).

Boron-10 has an abundance of 19.8% and Boron -11 has an abundance of 80.2%

To find:

The atomic mass of europium.

Solution:

Mass of Boron-10 = 10.013 amu

The percentage abundance of Boron-10 = 19.8%

The fractional abundance of Boron-10 =0.198

Mass of Boron-11 = 11.009 amu

The percentage abundance of Boron-11= 80.2%

The fractional abundance of Boron-11= 0.802

The average atomic mass of Boron = A.M

A.M = Mass of isotope x Fractional abundance of isotope

= 10.013amu x 0.198 +11.009amu x 0.802 = 10.81u

Therefore, D) 10.812 amu is the atomic mass of boron.

Answer:

14

Explanation:

The answer option which are products of combustion is: D. Heat and light.

In Chemistry, there are five (5) main types of chemical reaction and these include;

A combustion reaction can be defined as an exothermic chemical reaction between physical substances, usually in the presence of oxygen and hydrocarbons to produce heat, light and carbon.

An example of a combustion reaction is the burning of forest trees and plants.

In conclusion, the products of combustion are heat and light.

Read more: https://brainly.com/question/21453409

Answer:

heat and light

Explanation:

Answer:

363C

Explanation:

V = KT  and T = V/K

3.5=k(35+273) = 308k

k=3.5/308 =0.011

new T=7.0/0.011=636K = 636-273 =363C