Someone please help fast!!!please

Answer: it requires the amount of heat that it takes to make it steam

Explanation:

Answer:

.8°c my fingers jfjfjkfkrhrb

Answer:

Search by reactants (P 2O 5, H 2O) and by products (H 3PO 4)

H2O + P2O5 → H3PO4

H2O + HNO3 + P2O5 → H3PO4 + N2O5

Answer:

it happenes during sublimation

Answer:

C

Explanation:

Edg

Answer:

20.4 Miles

Explanation:

If Terry's riding speed is reduced by 3mph, he would be riding at 12mph.

12*1.7 = 20.4 miles

(miles per hour literally means how many miles you can travel in an hour at your current speed)

Answer:

Find the chemical formulas of oxides that contain the following composition:

S:50%; C:42,8%; Mn:49,6%; Pb:86,6%

Explanation:

In the given oxide of sulphur,

50%S is present that means remaining 50% is O.

Divide the % with atomic mass:

S                                     O

50/32= 1.5625            50/16=3.125

divide with smallest ratio:

1.5625/1.5625=1              3.125/1.5625=2

Hence, the formula of oxide is [tex]SO_2[/tex].

Similarly:

Carbon is 42.8% means the reamining % will be O that is 57.2%.

C                                                    O

42.8/12=3.575                         57.2/16=3.575

Divide with smallest ratio:

3.575/3.575=1                            3.575/3.575=1

Hence, the formula of oxide is CO.

Mn is 49.6% means the remining is % is O that is 50.4%.

First divide with atmic mass of respective element, then get the smallest ratio.

That gives the mole ratio of each constituent atom.

Mn                                 O

49.6/55.0=0.90            50.4/16=3.15

0.90/0.90=1                   3.15/0.90=3.5

Multiply with two

2                                        7

Hence, the formula becomes:

[tex]Mn_2O_7[/tex]

Pb is 86.6% means ---remaining 13.4% is O.

Pb                                               O

86.6/207 = 0.418 mol                13.4/16=0.85

0.418/0.418=1                               0.85/0.418=2.0

Hence, the formula is:[tex]PbO_2[/tex]  

Answer:

An ideal gas is a theoretical gas composed of many randomly moving point particles that are not subject to interparticle interactions. The ideal gas concept is useful because it obeys the ideal gas law, a simplified equation of state, and is amenable to analysis under statistical mechanics.

An ideal gas is theoretical

Answer:

b

Explanation:

the ocular lens or eyepiece lens ...so its b

Answer:

a) In the presence of light silver nitrate decompose to form silver. hence to prevent the decomposition it is kept in dark coloured bottles.

b) Molybdenum is used in the manufacture of ammonium because molybdenum acts as a promoter which increases the efficiency of the catalyst Iron, resulting in better yield of ammonia.

c) When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.

Answer:

Non-biodegradable wastes can be managed by practicing the concept of 3Rs—Reduce, Reuse, and Recycle.

...

Management Of Non-Biodegradable Wastes

Use fountain pen in place of a ballpoint pen,

Use old newspapers for packaging, and.

Use cloth napkins in place of disposable ones.

Explanation:

there!

Answer:

Hydroxyl

Explanation:

A P E X

The molecule is described as the, A. lipid with three unsaturated fatty acids.

A collection of two or more atoms bonded together by attractive forces known as chemical bonds is referred to as a molecule. In the given question, the molecule shown in diagram is a lipid, or triglyceride, with three fatty acids and a glycerol backbone. Unsaturated fatty acids are those with double or triple bonds in their molecular makeup.

Depending on how many double or triple bonds are typically there in its structure, a fatty acid can either be polysaturated or monounsaturated. Generally, there are three unsaturated fatty acids in this lipid, all of which contain one double bond in their structures.

Read more about molecule on:

https://brainly.com/question/30337264

#SPJ1

Answer:

[tex]{ \bf{ 2 Cl{}^{ - } _{(aq)} + Pb {}^{2 + } _{(aq)} \: ⟶ \: PbCl _{2(s)}}}[/tex]

Answer: Glucose (C6H12O6) is a hexose -- a monosaccharide containing six carbon atoms. Glucose is an aldehyde (contains a -CHO group). Five of the carbons plus an oxygen atom form a loop called a "pyranose ring", the most stable form for six-carbon aldoses.

Explanation:.

Answer:

[tex]{ \tt{c). \: replacement}}[/tex]

C) replacement

Iron(III) oxide (Fe2O3) reacts with aluminium(Al) to form aluminium oxide(Al2O3) and molten iron(Fe). This is a replacement reaction

Answer: The mass of chlorine gas required is 94.6 mg

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given mass of gold = 0.175 g

Molar mass of gold = 197 g/mol

Plugging values in equation 1:

[tex]\text{Moles of gold}=\frac{0.175g}{197g/mol}=0.000888 mol[/tex]

The given chemical equation follows:

[tex]2Au+3Cl_2\rightarrow 2AuCl_3[/tex]

By the stoichiometry of the reaction:

If 2 moles of gold reacts with 3 moles of chlorine gas

So, 0.000888 moles of gold will react with = of chlorine gas

Molar mass of chlorine gas = 71 g/mol

Plugging values in equation 1:

[tex]\text{Mass of chlorine gas}=(0.001332mol\times 71g/mol)=0.0946g=94.6mg[/tex]       (Conversion factor: 1 g = 1000 mg)

Hence, the mass of chlorine gas required is 94.6 mg

Answer:

NH2S4. . ...............................,..

Answer:

5 minutes 35 seconds because an earthquake travels underground faster than on the surface

Answer:

ver explicacion

Explanation:

La investigación cualitativa tiene que ver con la investigación que implica la recopilación de datos no numéricos, mientras que la investigación cuantitativa tiene que ver con la recopilación de datos numéricos.

La investigación científica a menudo tiene que ver con la observación y la realización de inferencias. Este aspecto de la investigación científica es cualitativo.

Al mismo tiempo, es posible que también se requieran gráficos, tablas y cuadros para la presentación de datos en ciertos tipos de investigación científica. Esta es ahora una investigación cuantitativa.

Por tanto, la investigación científica es tanto cualitativa como cuantitativa

Answer:

I think the answer would be b, sorry if I'm wrong(EDIT: ITS ACTUALLY AAAAA)

[tex]\begin{aligned} -5x+4y &= 3\\\\ x&=2y-15 \end{aligned}[/tex]

Answer:

A and B are both true

Explanation:

Na is REACTING with Cl2 to PRODUCE NaCl

Answer:

deez

Explanation:

Answer:

They tend to be more stable

Explanation:

A heterogeneous catalyst is a type of catalyst that exist in a phase which is different from the phases of the reacting mixture or specie or the products and the reactants are absorbed into sites on the catalyst for binding

The heterogeneous catalyst is used in industry because of its main advantage, which is its ease and simplicity of separation from the mixture of the reaction using a straightforward process such as filtration to recover and reuse a costly (heterogeneous) catalyst

Therefore, industry uses the heterogeneous catalyst because the catalyst tend to be more stable and can be easily recovered and reused in its original form

Answer:

A. They tend to be more stable.

Explanation:

Got a 100 on E2020.

Answer:

D) the critical point

Explanation:

Point A is the critical point in phase diagram. This is the highest temperature and pressure at which a pure material can exist in vapor/liquid equilibrium. Pretty cool!

Answer: Out of the given options [tex]HOCH_{2}OH[/tex] is expected to have the highest viscosity.

Explanation:

The resistance occurred in the flow of a liquid substance is called viscosity.

More stronger is the intermolecular forces present in a substance more will be its resistance in its flow. Hence, more will be its viscosity.

For example,  [tex]HOCH_{2}OH[/tex] has strong intermolecular hydrogen bonding than the one's present in [tex]CH_{3}CH_{2}OH[/tex] and [tex]CH_{3}CH_{2}CH_{3}[/tex]. This is because two-OH groups are present over here.

Thus, we can conclude that out of the given options [tex]HOCH_{2}OH[/tex] is expected to have the highest viscosity.

The question is incomplete, the complete question is:

Standardization of a Borax solution (Na2B4O7). A student titrates a 20.00 mL sample of an aqueous borax solution with 1.044 M H2SO4. It takes 2.63 mL of acid to reach the equivalence point. Knowing it takes 1 H2SO4 to neutralize 2 Na2B4O7, what was the concentration of this Borax solution?

Answer: The concentration of borax solution is 0.069 M.

Explanation:

To calculate the concentration of borax solution, the formula used is:

[tex]n_1C_1V_1=n_2C_2V_2[/tex] ....(1)

where,

[tex]n_1, C_1\text{ and }V_1[/tex] are the n-factor, concentration and volume of sulfuric acid

[tex]n_2,C_2\text{ and }V_2[/tex] are the n-factor, concentration and volume of borax solution.

We are given:

[tex]n_1=1\\C_1=1.044M\\V_1=2.63mL\\n_2=2\\C_2=?M\\V_2=20mL[/tex]

Putting values in equation 1, we get:

[tex]1\times 1.044\times 2.63=2\times C_2\times 20\\\\C_2=\frac{1\times 1.044\times 2.63}{2\times 20}\\\\C_2=0.069M[/tex]

Hence, the concentration of borax solution is 0.069 M.