NEED HELP ASAP CHEMISTRY. Giving away Many points, i got 20+ more questions

Answer:  If a reaction produces a gas such as oxygen or carbon dioxide, there are two ways to measure the reaction rate: using a gas syringe to measure the gas produced, or calculating the reduction in the mass of the reaction solution.

Explanation:

https://courses.lumenlearning.com/introchem/chapter/measuring-reaction-rates/#:~:text=If%20a%20reaction%20produces%20a,mass%20of%20the%20reaction%20solution.

This is the site I got it from.  I hope this helps.

Answer:

D. pKa × pKb = 1 × 10-14

Explanation:

hope this helps, if not, give me time to edit

Answer:

B. Ka × Kb = 1 × 10-14

Explanation:

yw

Answer:

high density is the ans because density is the mass per unit volume.if mass increases density also increases.

Answer:

High temperature is an object with a small volume and a large mass.

Answer is no A

Answer:

Oxygen has two allotropic forms, diatomic (O₂) and triatomic (O₃, Ozone).

-TheUnknownScientist

Answer:

477 ºC

Explanation:

on an isobaric process, an increase on the volume implies an increase on the temperature:

V1/T1 = V2/T2

T2 = V2T1/V1 = 15.0 L×150 K/3.00 L = 750 K

t/ºC = T/K - 273 = 750 K/K - 273

t = 477 ºC

V1: initial volume

T1: initial temperature

V2: final volume

T2: final temperature

Answer:

6.32 moles of Fe

Explanation:

The given chemical equation is presented as follows;

2Fe + 3Cl₂ → 2FeCl₃

The mass of Cl₂ in the reaction = 336 grams

The molar mass of chlorine gas Cl₂ = 35.435 g/mol

The number of moles, n = Mass/(Molar mass)

The number of moles of Cl₂ in the reaction, n = 336 g/(35.435 g/mol) ≈ 9.842 moles

From the given reaction, 3 moles of Cl₂ react with 2 moles of Fe to produce 2 moles of FeCl₃

By the law of definite proportions, we have that 9.482 moles of Cl₂ will react with approximately 9.482 × 2/3 = 6.32 moles of Fe to produce approximately 6.32 moles of FeCl₃

Therefore, approximately 6.32 moles of Fe will be required to react with 336 grams of Cl₂.

Answer:

C

Explanation:

Brainliest

I tried my best

Answer:

+2

Explanation:

the atom will acquire the noble gas configuration if it loses 2 electrons, becoming a divalent cation

Answer:

4.214 × 10^23 molecules.

Explanation:

Number of molecules in a substance can be calculated by multiplying the number of moles in that substance by Avagadro's number, which is 6.02 × 10^23.

That is, no. of molecule = n × Avagadro constant

In this case, there are 0.7 moles of fructose. Hence;

number of molecules = 0.7 × 6.02 × 10^23

no. of molecule = 4.214 × 10^23 molecules.

Answer:

Matter

Explanation:

It has mass and it takes up space

Answer: In Arizona, climate change is already making deadly heat waves, droughts and wildfires across the state worse. These impacts have real costs on Arizonans' health and economy, including heat-related deaths, higher electricity bills, crop losses and more.

Explanation:

https://www.edf.org/climate/costofinaction- this is where I gathered this info.  Not mine.  But I hope it helps!

Answer: 1. Connective Tissue 2.)Epithelial Tissue 3.)Muscle Tissue 4.)Nervous Tissue

Explanation:

Answer:

deflection,Coriolis effect

hope this helps

Explanation:

A) fission: Iodine-140 (atomic number = 53)

B) fusion: 1 neutron

C) fission: Uranium-233 (atomic number = 92)

Answer:

D. It is considered to be a different element than a neutral Sc atom.

The statement i.e. not true of the Sc3+ ion is that it is considered to be a different element than a neutral Sc atom.

The statements that should be considered as true regarding the Sc3 + ion is as follows:

Therefore we can conclude that the statement i.e. not true of the Sc3+ ion is that it is considered to be a different element than a neutral Sc atom.

Learn more: brainly.com/question/362440

Answer:

Se aclama la nanotecnología por tener el potencial de aumentar la eficiencia del consumo de energía, ayudar a limpiar el medio ambiente y resolver los principales problemas de salud. Se dice que puede aumentar masivamente la producción de fabricación a costos significativamente reducidos.

espero que esto ayude

Answer:

B)Stabilizes the body

...........................

Answer:

No

Explanation:

Binary compounds contain only 2 distinct elements.

For example magnesium oxide MgO is a binary compound.

NaHCO3 contains 4 distinct elements.

if you really liked this person then it would be no discussion if you really do like this person then you want to wait

Answer:

Wait on her

Explanation:

Talk to her and try to be friends with her. Let her talk about the relationship she came out of and see if she wants to meet someone new. If she seems interested in you, take that chance. If she seems to be interested in someone else, find someone new.

Answer:

2450 joules

Explanation:

The formula for potential energy is PE = m x g x h

m is the mass, in kg (50)

g is the acceleration due to gravity, in meters per second squared (9.8)

h is the height, in meters (5)

The problem gives m = 50, g = 9.8, and h = 5. Plug that into the formula and get the answer.

[tex]PE = mgh\\PE = (50) (9.8) (5)\\PE = 2450[/tex]

According to law of conservation of energy and substitution of values in formula gives,2540 joules as maximum kinetic energy.

According to law of conservation of energy, it is evident that energy  is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.Substitution in formula gives , PE=50×9.8×5=2540 J.

Thus, the maximum kinetic energy she can reach when she skis to the bottom of the slope is 2540 J.

Learn more about law of conservation of energy,here:

https://brainly.com/question/29775341

#SPJ7

Answer: A. is prey B. is predator C. is habitat D. is comunity E. is plants are producers and plant eating animals  consumors  F. is food chain G. is food web H. parasite I decomposers and scavengers J. is compete K an adsption

Explanation:

Answer:

Its the second one i think

Explanation:

Coz liquid can move faster then a solid obviously :)

Answer:

dark brown with a hint of purple

have a good day :)

Explanation:

Answer:

When a saturated solution at a high temperature is cooled, why is the solution separated as a solid? When a saturated solution at a high temperature is cooled, inter molecular space between the molecules of the solution decreases. As a result, no more solute can remain in a solution separating out as a solid crystal.

Answer:

[tex]\boxed {\boxed {\sf 421,786.7818 \ mol \ H_2O}}[/tex]

Explanation:

We are asked to convert from molecules of water to moles.

1 mole of any substance contains the same number of particles (atoms, molecules, formula units, etc). This is Avogadro's Number: 6.022*10²³. In this problem, the particles are molecules of water.

Use Avogadro's Number to make a ratio.

[tex]\frac {6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]

Multiply by the number of molecules given: 2.54 *10²⁹

[tex]2.54 *10^{29} \ molecules \ H_2O \times \frac {6.022 *10^{23} \ molecules \ H_2O}{1 \ mol \ H_2O}[/tex]

Flip the ratio so the units of molecules of water cancel.

[tex]2.54 *10^{29} \ molecules \ H_2O \times \frac {1 \ mol \ H_2O}{6.022 *10^{23} \ molecules \ H_2O}[/tex]

[tex]2.54 *10^{29} \times \frac {1 \ mol \ H_2O}{6.022 *10^{23} }[/tex]

Condense the problem into 1 fraction.

[tex]\frac {2.54 *10^{29} }{6.022 *10^{23} }\ mol \ H_2O[/tex]

[tex]421786.7818 \ mol \ H_2O[/tex]

2.54 *10²⁹ molecules of water are 421, 786.7818 moles of water.