need help please ,thx

Answer:

takes part in a chemical reaction

Explanation:

An atom is defined as the smallest part of an element that takes part in a chemical reaction.

When chemicals react, they simply exchange their atoms and recombine to form compounds where the atoms inside of them have a stable configuration.

Answer:

The answer is 24 miles.

Explanation:

Every hour he rides 8 hours. If he rides for three hours you can take 8 miles x 3 hours which is 24 miles.

The speed of the  riding is 8 miles/hours . Within a time of 3 hours Andy will go for a distance of 24 miles.

Speed is a physical quantity which measures the distance covered per unit time. The rate of speed is called velocity both having the units m/s, km/hr, miles/hr etc.

Speed is directly related to the distance covered. As the speed increases, distance covered by the object also increases. Whereas as the time increases, distance covered will decreases.

Given the speed of ride = 8 miles/s

time  = 3 hours.

Distance = speed × time.

               = 8 miles/ hr × 3 hours

               = 24 miles.

Therefore, Andy will reach out a distance of 24 miles within 3 hours when ride with a speed of 8 miles/s.

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Answer:

NH4+ will be ammonium, NH3 is ammonia which is the conjugate base of ammonium.

Explanation:

Answer:

mole ratio = Fe:O2 = 2 : 3

36 grams of iron = how many moles?

well, 36/56 = 0.64 moles

multiply this by 1.5 =0.96 moles

this * 16 =15.43 grams

According to stoichiometry and balanced chemical equation of iron and oxygen 17.15 g of rust is produced when 12 g iron reacts with oxygen.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

The balanced chemical equation for formation of rust when iron reacts with oxygen  is,

4 Fe + 3 O₂[tex]\rightarrow[/tex] 2 Fe₂O₃

223.36 g of iron produces 319.38 g of rust

∴ 12 g iron will produce 12×319.38/223.36= 17.15 g of rust.

Therefore, 17.15 g rust is produced from 12 g iron when it reacts with oxygen.

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Answer:

Fossils of the same animals have been found on South America and on Africa.

Africa and South America look as if they could be fit together perfectly (they almost can!)

Explanation:

Basically, the idea is that South Africa and Africa were once the same landmass. The same animals lived in that landmass, but when they broke off, then the animals were on different continent, yet they came from the same place.

Answer:

I dont know about the yield but I think mno2 is the limiting reactant

Answer:

reduces

Explanation:

According to Boyle's law, when the pressure of a gas increases at constant temperature the volume reduces.

Boyle's law states that "the volume of fixed mass of a gas is inversely proportional to the change in pressure if the temperature is constant".

Mathematically, it is expressed as;

     P1 V1  = P2 V2

P and V are pressures

1 and 2 are initial and finals state.

Boyle's law is stated for the ideal gas at a constant temperature. According to Boyle's law, with an increase in pressure, the volume of the gas decreases.

The ideal gas is given as the gas in which the interatomic collisions are zero, and the changes are produced with the collisions to the walls.

Boyle's law is stated as the gas is at a constant temperature. According to the ideal gas, the pressure and volume are inversely related.

With the increase in pressure, the volume of the gas decreases and vice versa.

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Answer:

you need to know what you're finding the mass of.

Explanation:

This is just one example. There are probably more out there, but this is one thing my parents taught me. Hope this helps, and tell me if I'm wrong!

Answer:

oxidation, synthesis, polymerization

Explanation: I took the test

The three types of reactions are product that is a chemically bonded combination of reactants are oxidation, synthesis, polymerization

Conclusively, we can therefore say that the three types of reactions are product that is a chemically bonded combination of reactants are oxidation, synthesis, polymerization

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Answer:

Explanation:

I would ask him why would he want to add the blue stripe?

why would he want to add the blue stripe in tooth paste? I would ask

A toothpaste is composed of many ingredients like surfactants, abrasive agent, thickening agent, flavors, humectants, solvent, buffer, color, fluoride etc.

Surfactant provide foam, helps to spread the toothpaste throughout the mouth, have detergent action, example is sodium lauryl sulphate.

Abrasive agents have cleaning action like calcium carbonate, calcium phosphate etc.

Thickening agents act as a binder which prevent ingredients from spreading include natural gum, seaweed colloids etc.

Humectants helps to retain water which helps the paste to drying out such as glycerol, sorbitol etc.

Solvents act as a carrier of other ingredients of the toothpaste which makes it flowable and provide hydration.

Buffer is added to stop the toothpaste from being acidic such as trisodium phosphate, sodium citrate etc.

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Answer:

Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.

Answer:

where is the table..............

Answer:

B

Explanation:

I just took the test.

Answer:

sipi

Explanation:

Answer:

Organs of the male productive system are the scrotum, spermatic ducts, sex glands, and penis. They coinside to produce sperm, gametes, and semen.

Explanation:

I payed attention in health <3 nah jk I am an expert of all things man

Answer:

KOH  molar mass = 39 + 16 + 1 = 56g

To make 1 L of 1M soln needs 56g KOH

To make 500mL 1M needs 56/2 = 28g

To make 500mL 0.2M needs 28 x 0.2gn:

Explanation:

The weight of KOH are required to prepare 500. mL of 0.450 KOH solution is 12.6 gm

Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution.

In chemistry, the most commonly used unit for molarity is the number of moles per liter, having the unit symbol mol/L or mol/dm³ in SI unit.

Molar mass of KOH  = 39 + 16 + 1 = 56g

To make 1 L of 1M soln needs =  56g KOH

To make 500mL 1M needs 56/2 = 28g

To make 500mL 0.450 M needs =  28 x 0.450

                                                      =  12.6 gm

Therefore, The weight of KOH are required to prepare 500. mL of 0.450 KOH solution is 12.6 gm.

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Answer:

Pure substance

Explanation:

A material that consists of only one type of element or compound is regarded as a pure substance.

A pure substance has the following properties;

Compounds and elements are pure substances too.

There is 40 g of sugar in a 500 ml bottle of lemon juice

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

the concentration of sugar in lemon juice :

[tex]\tt \dfrac{20~g}{250~ml}=0.08~g/ml[/tex]

So for 500 ml juice :

[tex]\tt 500\times 0.08=40~g~sugar[/tex]

Answer:

32 degrees fahrenheit

Explanation:

Answer:

c

Explanation:

Answer:

c

Explanation:

Answer:

I hope your having a good day, here is the answer to your following question:

C is the most highest energy...i just looked at a Periodic Trends — Ionization Energy

If i get it Right give brainlest

Explanation:

Answer:

[tex]p_f=0.5atm[/tex]

Explanation:

Hello!

In this case, since the reaction between nitrogen and hydrogen produces ammonia:

[tex]N_2+3H_2\rightarrow 2NH_3[/tex]

We can compute the volume of the container by using the ideal gas law at STP (1 atm and 273.15 K):

[tex]V=\frac{4.0mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1atm}=89.7L[/tex]

Next, since nitrogen and hydrogen are in a 1:3 mole ratio, we understand all the nitrogen and hydrogen are consumed and only ammonia remains at the end of the reaction in the following amount:

[tex]n_{NH_3}=1.0molN_2*\frac{2molNH_3}{1molN_2} =2.0molNH_3[/tex]

Thus, the final pressure turns out:

[tex]p_f=\frac{2.0mol*0.08206\frac{atm*L}{mol*K}*273.15K}{89.7L}\\\\p_f=0.5atm[/tex]

Best regards!

Answer:

a) Molarity = 0.199M

b) 21.6L of solution

c) 0.199 moles of sucrose in 1L

Explanation:

a) Molarity is the ratio of moles of solute (sucrose) in volume of solution (3.30L):

Moles sucrose -Molar mass: 342,3g/mol-:

225.0g * (1mol / 342,2965g) = 0.6573 moles

Molarity = 0.6573 moles / 3.30L

b) 0.199M means 0.199 moles in 1L. 4.30 moles are in:

4.30 mol * (1L / 0.199mol) = 21.6L of solution

c) By definition, there are 0.199 moles of sucrose in 1L. This is the meaning of 0.199M

HOW TO CALCULATE MOLARITY:

QUESTION A:

QUESTION B:

QUESTION C:

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Answer: d.) x= -7.5 x= -0.5

Explanation: correct on edge 2021

When determining a body's mass, the most popular units to employ are pounds (lb) and kilograms (kg). For correct trade, engineering, and scientific study, accurate conversion between these two is therefore crucial. Here 2/5 tons is 881.84 pounds.

Scales are used in numerous ways to determine a body's weight or mass. To measure various items of various sizes, various sorts of scales are utilized. As the measure of an object's weight, pounds are used. In Britain, this style of weighing in pounds is typical. Additionally, it can be written as Lb or Lbs.

Here 1 tons = 2204.62 pounds

Thus 2/5 tons = 2/5 × 2204.62

2/5 tons = 881.84 pounds

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Answer:

C. Colloids

Explanation:

Because these two mixtures don't mix

Answer:

D. suspension

Explanation:

I took this assignment the other day and made a 100

Answer:

im pretty sure the electron configuration of the barium ion Ba+2 is [Kr]5s24d105p6

Explanation:

Answer: they form at equal rates

Explanation:

By definition, at equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction.

Answer: organelles

Explanation:

Similar to the way your stomach, lungs, and heart have different functions in your body, each organelle has a different function within the cell.