Can someone plzzzzz helppppp me plzzzzzz( and don’t tell me to click a link it doesn’t work)

Answer:

I will take Aspirin if I had a headache

sorry i dont know Explanation:

When water changes from a solid to a liquid it is called melting.

Solid ice melts and forms into a liquid: water.

If this incorrect, please, don't refrain to tell me. Thank you.

Answer:

Atmoshphere!

Explanation:

I took the test and got a 100%! :) Hope this helps, plz mark brainliest!

Answer:

honey

Coffee

blood

Explanation:

These components are uniformly distrubuted and these cannot be seperated unlike heterogeneous

Answer:

cell wall and chloroplasts

Explanation:

Explanation:

Sustainable consumption refers to the proper use of good and services to meet basic needs and to avail better quality of life. Also, it minimizes the uses of natural resources, toxic materials, and emissions of waste and pollutants over the life cycle.

Answer:

CaCO3 (s)

Explanation:

This equation is a double replacement equation, which means that since Na and Cl and paired, Ca and CO3 will be paired.

Then, you look at the charge of each element and balance

Ca has a 2+ charge

CO3 has a 2- charge

The 2+ charge and the 2- charge will cancel so there is no need for a  subscript or to balance the equation

The complete equation will be Na2CO3 (aq) + CaCl2(aq) -> NaCl (aq) + CaCO3 (s)

I hope this helps and have a great day!

Answer:

Runner A is moving at a constant speed, therefore has a positive acceleration.

Runner B is moving at a constant speed, stopping, then speeding up again.

Explanation:

Answer:

pH = 2.462.

Explanation:

Hello there!

In this case, according to the reaction between nitrous acid and potassium hydroxide:

[tex]HNO_2+KOH\rightarrow KNO_2+H_2O[/tex]

It is possible to compute the moles of each reactant given their concentrations and volumes:

[tex]n_{HNO_2}=0.02000L*0.1000mol/L=2.000x10^{-3}mol\\\\n_{KOH}=0.1000mol/L*0.01327L=1.327x10^{-3}mol[/tex]

Thus, the resulting moles of nitrous acid after the reaction are:

[tex]n_{HNO_2}=2.000x10^{-3}mol-1.327x10^{-3}mol=6.73x10^{-4}mol[/tex]

So the resulting concentration considering the final volume (20.00mL+13.27mL) is:

[tex][HNO_2]=\frac{6.73x10^{-4}mol}{0.01327L+0.02000L} =0.02023M[/tex]

In such a way, we can write the ionization of this weak acid to obtain:

[tex]HNO_2+H_2O\rightleftharpoons NO_2^-+H_3O^+[/tex]

So we can set up its equilibrium expression to obtain x as the concentration of H3O+:

[tex]Ka=\frac{[NO_2^-][H_3O^+]}{[HNO_2]}\\\\7.1x10^{-4}=\frac{x^2}{0.02023M-x}[/tex]

Next, by solving for the two roots of x, we get:

[tex]x_1=-0.004161M\\\\x_2=0.003451M[/tex]

Whereas the correct value is 0.003451 M. Finally, we compute the resulting pH:

[tex]pH=-log(0.003451)\\\\pH=2.462[/tex]

Best regards!

Answer:

s8sooooosoossososososkdk

Answer:

The change of state that has occurred is from a gas to a liquid

Note: The question is incomplete. The complete question is given blow.

H₂O is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?

from a gas to a liquid

from a liquid to a gas

from a solid to a liquid

from a gas to a plasma

Explanation:

Water can exists in three states: as gaseous water vapor, as liquid water, and as solid ice. Each of these states of water can be interconverted from one to another by the addition or removal of heat in a process known as change of state.

Liquid water can be converted to solid ice by the removal of heat, while solid ice ice can be converted to liquid water by the addition of heat. Also, liquid water can be converted to water vapor by the addition of heat, while water vapor can be converted to liquid water by the removal of heat.

Of the three states of water, the one in which the molecules are farthest apart is in the gaseous state. The molecules have high kinetic energy and move randomly while colliding with one another. When a heat is removed from these highly energetic molecules, the molecules slow down and lose some of their kinetic energy and a change of  occurs from gaseous to liquid state.

Therefore, the change of state that occurred as described, is from gas to liquid.

Answer:

D

Explanation:

we just did this in class last week haha i know my math :)

Answer:

Yes

Explanation:

Answer:

Por cada 9 moles de zinc, 9 moles de fosfato de zinc se producen.

Explanation:

La reacción balanceada es:

3 Zn+ 2 H₂PO₄ → Zn₃(PO₄)₂ + 2 H₂

Por estequiometria de la reacción (es decir, la relación entre la cantidad de reactivos y productos en una reacción química), las siguientes cantidades de moles de cada compuesto participan de la reacción:

Entonces podes aplicar la siguiente regla de tres: si por estequiometria 3 moles de zinc produce 1 mol de fosfato de zinc, 9 moles de zinc cuántos moles de fosfato de zinc producirá?

[tex]moles de fosfato de zinc=\frac{9 moles de zinc*1 mole de fosfato de zinc}{3 moles de zinc}[/tex]

moles de fosfato de zinc= 9

Por cada 9 moles de zinc, 9 moles de fosfato de zinc se producen.

They burn fossil fuels, which releases huge amounts of sulfur dioxide and nitrogen oxide that pollute the air. ... Two thirds of all sulfur dioxide and more than one third of all nitrogen oxides that pollute the air.

Answer:

The Rutherford Model shows an atom with electrons orbiting a fixed, positively charged nucleus in set, predictable paths. The Bohr model shows electrons travel in defined circular orbits around the nucleus.

Answer:

The elements of the same group have the same number of valence electrons, that is why they have similar properties

Answer:

1.79 moles

Explanation:

1.79 moles

1.79 moles

1.79 moles

1.79 moles

Answer:1.79 moles

1.79 moles are there in 100g of iron.

Explanation:

thats the answer for it

2Na + MgF2 → 2NaF + Mg

Answer:

-Warm air sinks, creating an area of low pressure.

Explanation:

Heat will weigh more, than cool air!

Answer:

but iron is 2 and 3 by its valance how could it be possible

Answer:

if you want to protect our ozone depletion you have aerosol products that don't contain HCFCs and CFCs as stimulus or incitement

Explanation:

why you should use aerosol because when the liquid mixture is freeded or released from the aerosol the liquid propellant becomes a gas so this can easily break up the product into a fine haze or a mist hope its helpful have a good luck

Answer:

Carbon monoxide, (CO), a highly toxic, colourless, odourless, flammable gas produced industrially for use in the manufacture of numerous organic and inorganic chemical products; it is also present in the exhaust gases of internal-combustion engines and furnaces as a result of incomplete conversion of carbon or carbon

Explanation:

Answer:

why joy deleting my answer

Explanation:

Answer:

Physical property

Explanation:

Change in state is a physical property of matter.

Answer:

[tex]3 g/cm^{3}[/tex]

Explanation:

Density is a measure of a substance's mass over its volume.

d = m/v

Therefore d = 60g/20cm3 = 3 g/cm3

Answer:In the given molecule the methyl group is attached at the second carbon atom of the parent chain. Therefore the name of hydrocarbon is 2-methylbutane.

Explanation: