I need help on this 6th grader science plants.

Answer:

2.57 e-9

Explanation:

The formula is H3O=10^-Ph

10^-8.59=2.57 e-9

Answer:

sorry i never learned this

Explanation:

Answer:

The right answer is "236.53 g".

Explanation:

The given values are:

P = 1.09 atm

V = 186 liters

The reaction will be:

⇒  [tex]KClO_3 (s)\rightarrow 2Kcl(s)+3O_2(g)[/tex]

The moles of O₂ will be:

=  [tex]\frac{PV}{RT}[/tex]

On substituting the values, we get

=  [tex]\frac{1.09\times 186}{0.0821\times 850}[/tex]

=  [tex]\frac{202.47}{69.785}[/tex]

=  [tex]2.90 \ moles[/tex]

Now,

1 mole O₂ is produced from

= [tex]\frac{2}{3} \ mol \ KClO_3[/tex]

then,

2.90 mole O₂ is produced from 2 mol KClO₃

= [tex]\frac{2}{3}\times 2.90[/tex]

= [tex]1.93 \ mol \ KClO_3[/tex]

hence,

The number of grans of solid in the engine will be:

= [tex]1.93\times 122.55[/tex]

= [tex]236.53 \ g[/tex]

Answer:

I think it's true

Explanation:

hey by the way

Answer:

please give me brainlist and follow

Explanation:

When dilute sulphuric acid is added to barium chloride solution, barium sulphate is formed as a precipitate and hydrogen chloride is formed in aqueous solution.

Answer:

OH- is the correct answer

mark me brainst answer

Answer:

h

Explanation:

The common ion in all acids is the hydrogen or hydronium ion

Answer:

i did c

Explanation:

Answer:

[2 ]Na+[2 ]H2O -> [ 2] NaOH + [1]H2

From the relative atomic mass of each element, it is possible to determine each element's molar mass by multiplying the molar mass constant (1 g/mol) by the atomic weight of that particular element. The molar mass value can be used as a conversion factor to facilitate mass-to-mole and mole-to-mass conversions.

Answer:

A substances molar mass is determined by increasing its relative nuclear mass by the molar mass constanttt (1 g/mol). So the molar mass consistent can be utilized to change mass over to moles. So by duplicating a given mass by the molar mass, the measure of moles of the substance can be determined.

Explanation:

From the general nuclear mass of every component, it is feasible to decide every component's molar mass by duplicating the molar mass steady (1 g/mol) by the nuclear load of that specific element.The molar mass worth can be utilized as a change factor to work with mass-to-mole and mole-to-mass transformations.

Brainliest?

Answer: Hence, mass of CO2​ is 22g.

Explanation: N/A

Answer:

mole=mass/RMM

5mole =mass/44

mass= 44×5=220grams

Explanation:

Co2 molecular weight =44 ,cross multiply then you get your mass.

Answer:

A gradual change in the shape of the continents.

Explanation:

An example is tropical plant fossils are found in the Artic.

An example of geologic evolution is a gradual change in the size of continents.

Geological evolution is the process of gradual change and events in antiquity that include the steps to create the Earth.

At first, there was extreme volcanism, later the planet cooled to create the crust. Also, condensed water vapor formed the oceans and seas.

The geological history of Earth follows the major geological events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy).

Geological evolution studies the shape of the globe, how it formed, and the relationships of the different eras and the matter that changed during them.

Therefore, An example of geologic evolution is a gradual change in the size of continents.

Learn more about Geological Evolution, here:

https://brainly.com/question/28740406

#SPJ3

Answer:

I think it would be c

Explanation:

Answer:

The physical properties of matter are those characteristics that can be measured without altering the atomic structure, while the chemical properties of matter are those characteristics that result in a change in the atomic structure.

Answer:

Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃

The coefficients are: 1, 6, 3, 2

Explanation:

__Fe₂(SO₄)₃ + __KOH —> __K₂SO₄ + __Fe(OH)₃

To determine the correct coefficients, we shall balance the equation. This can be obtained as follow:

Fe₂(SO₄)₃ + KOH —> K₂SO₄ + Fe(OH)₃

There are 2 atoms of Fe on the left side and 1 atom on the right side. It can be balance by writing 2 before Fe(OH)₃ as shown below:

Fe₂(SO₄)₃ + KOH —> K₂SO₄ + 2Fe(OH)₃

There are 6 atoms of OH on the right side and 1 atom on the left side. It can be balance by writing 6 before KOH as shown below:

Fe₂(SO₄)₃ + 6KOH —> K₂SO₄ + 2Fe(OH)₃

There are 6 atoms of K on the left side and 2 atoms on the right side. It can be balance by writing 3 before K₂SO₄ as shown below:

Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃

Now, the equation is balanced.

Therefore, the coefficients are: 1, 6, 3, 2

Answer:

what they have in common is consist of electrons, protons, and neutrons.

Explanation:

Answer:

Borax bead test

Explanation:

Another test that can be used to identify colored ions in a specific compound such as salt is called "Borax bead test".

This test involves use of a clear glassy bead of borax that is joined together in a wire loop which is going to be involved in chemical reaction with the salts of certain metals.

This reaction will produce colors that we can use to identify the exact metal ions that are present.

Answer:

Some of the major biogeochemical cycles are as follows: (1) Water Cycle or Hydrologic Cycle (2) Carbon-Cycle (3) Nitrogen Cycle (4) Oxygen Cycle. The producers of an ecosystem take up several basic inorganic nutrients from their non-living environment.

Explanation:

Answer:

The empirical formula of the hydrocarbon is C₂H₅

Explanation:

The formula for the hydrocarbon is [tex]C_xH_y[/tex]

The mass of CO₂ produced per 1,000 g of H₂O = 1,955 g

The equation for the chemical reaction is given as follows;

[tex]C_xH_y[/tex] + (x + y/4) O₂ → XCO₂ + y/2H₂O

From the given chemical equation, counting the number of atoms on both sides of the equation, we have;

The molar mass of CO₂ = 44.01 g/mol

The molar mass of H₂O = 18.01528 g/mol

The number of moles of H₂O in 1,000 g of H₂O = 1,000 g/(18.01528 g/mol) = 55.5084351 moles

The number of moles of CO₂ in 1,955 g of H₂O = 1,955 g/(44.01 g/mol) = 44.4217223 moles

Therefore, given that X moles of CO₂ is produced alongside Y/2 moles of H₂O. we have;

X = 44.4217223, Y/2 = 55.5084351

∴ Y = 2 × 55.5084351 = 111.0168702

The ratio of X to Y = X/Y = 44.4217223/111.0168702 = 0.40013488238

∴ The ratio of X to Y = X/Y ≈ 0.4 = 4/10

X/Y ≈ 4/10

The empirical formula is the representation of molecular formula in the smallest whole number ratio of the elements of the molecules

Therefore, when X = 4, Y = 10, from which we have the smallest ratio as;

When X = 2, Y = 5

The empirical formula of the hydrocarbon is therefore, [tex]C_xH_y[/tex] = C₂H₅

The given chemical equation becomes;

C₂H₅ + (2 + 5/4) O₂ → 2CO₂ + 5/2H₂O

C₂H₅ + 3.25 O₂ → 2CO₂ + 2.5 H₂O

We then have;

4C₂H₅ + 13 O₂ → 8CO₂ + 10 H₂O

The empirical formula of the hydrocarbon, [tex]C_xH_y[/tex] = C₂H₅.

Answer:

Anuclear power plant is used to generate electricity

Answer:

Anuclear power plant is used to generate electricity

thank me later

Explanation:

Answer:

a

Explanation:

Answer:

i believe it's D

Explanation:

Answer:

D

Explanation:

Answer:

automatic transmission

Explanation:

An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in motor vehicles that does not require any driver input to change gears under normal driving conditions.

Answer:

Explanation:

When the two atoms are in contact, potassium transfers its outer electron to chlorine which readily accepts it, resulting in both atoms achieving a state of eight outermost electrons. With this electron transfer, the ionic bond in KCl is formed.

Hope this helped!!!

Potassium has just one valence electron and Chlorine has 7 electrons, Chlorine needs just one atom to complete its octet which is provided by Potassium atom for formation of Potassium Chloride (KCl).

Chemical bonding is the formation of chemical bonds present between two or more atoms or molecules which give rise to new compound. Bond is formed from electrostatic force present between oppositely charged ions like in ionic bonds or by sharing of electrons like in covalent bonds.

There are two types of Chemical Bonding:

1. Ionic Bonding

It is formed between opposite charged particles like Anion (negatively charged) and Cation (Positively charged) by the strong force of attraction.

For example, KCl formed by the ionic bond formation present between Potassium and Chlorine

2.Chemical Bonding

It is formed between two atoms for completing its octet by sharing of electrons.

For example, [tex]H_2[/tex] formed by sharing the electrons to complete its electronic configuration.

Thus, Potassium has just one valence electron and Chlorine has 7 electrons, Chlorine needs just one atom to complete its octet which is provided by Potassium atom for formation of Potassium Chloride (KCl).

Learn more about Chemical Bonding, here:

https://brainly.com/question/15444131

#SPJ2

Answer:

c Density

Explanation:

I don'tknow if I am right if I am wrong correct me

Explanation:

The reaction between an acid and a base is known as a neutralisation reaction.

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...

Physical state of the reactants and surface area. ...

Temperature. ...

Presence of a catalyst.

ammonia

An alkaline gas which produces dense white fumes when reacted with HCl gas is ammonia and fumes are of compound ammonium chloride.

BRAINILIEST PLEASE

Answer:

0.72 good luck with the answer

Answer:

575g

Explanation:

Mole ratio Fe : O2 = 3:2

so moles of Fe = 1.5 x 6.85 = 10.275 moles

mass=moles x Ar

Ar Fe= 56

mass = 10.275 x 56=575g