What are chemicals that speed up the rate of chemical change?

Answers

Answer 1

Catalysts speed up chemical reactions / changes.

Hope this helps!


Related Questions

(will mark brainliest if ou give me the right answer!!!!)

You observe your friend rub a balloon on their wool sweater and then stick it to the wall. To investigate, you set up an experiment to test whether other objects will respond in the same way when you rub them against a sweater. What is the test variable in your experiment?

A. The number of times you rubbed the object on the sweater
B. The observation that the object sticks to the wall
C. The sweater you use to rub against the objects
D. The type of objects you are testing in the experiment

Answers

Answer:

D

Explanation:

BEcause you are testing which objects will stick. Your control variable will be the sweater. And the number of times you rub the object on the sweter will not make it stick. It will make it stick for a longer period.

Answer:

D. The type of objects you are testing in the experiment

the atom is one of the basic units of matter. which part of the atom mostly determines the size of the atom?

Answers

Answer:

nucleus

Explanation:

The nucleus contains the majority of an atom's mass because protons and neutrons are much heavier than electrons, whereas electrons occupy almost all of an atom's volume

A solution of the ionic salt
Lihco3 would have ____ pH.

ANSWER : BASIC

Answers

The pH of the solution is calculated to be 11.3 which would be an alkaline solution (blue)

Hope this helps

A solution of the ionic salt Lihco3 would have 11.3 pH.

What is ionic salt ?

In chemistry, salt exists as a chemical compound consisting of an ionic group of positively charged cations and negatively charged anions, which results in a combination with no net electric charge. A common example stands table salt, with positively charged sodium ions and negatively charged chloride ions.

The fragment ions in a salt compound can be either inorganic, such as chloride (Cl−), or organic, such as acetate (CH3CO−2). Each ion can be either monatomic, such as fluoride (F−), or polyatomic, such as sulfate (SO2−4).

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Which phrase best describes the vapor point of a substance?
the strength of the bonds between molecules of a substance that is in a gaseous state
the amount of heat energy required to change a substance from a liquid to a gas
the temperature at which additional heat energy causes the substance to change from a liquid to a gas
the average kinetic energy of the molecules of a substance in its gaseous state

Answers

The phrase which best describes the vapor point of a substance is Choice C; the temperature at which additional heat energy causes the substance to change from a liquid to a gas.

The vapour point of a substance by definition is the state of a substance at which upon addition of any amount of heat energy; he substance undergoes a phase change from liquid to solid.

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how many different types of nucleotides are found in nucleic acids

Answers

Answer: four different types!!!!

Explanation:

Which animal resembles their parents already after being born or hatched?

Answers

i think maybe reptiles bu i could be wrong. :)

What effect does salt have on a marshmallow?

Answers

Answer:

The original marshmallow was named for the inclusion of marshmallow root in the recipe. The roots and leaves of the marshmallow plant contain mucilage, a slimy-textured demulcent best known for its use as a homeopathic cough suppressant. Marshmallow root is considered to be soothing and mildly antimicrobial. It has long been used as an herbal treatment for minor digestive issues and skin irritations, although its use in the creation of its namesake confection has long since fallen by the wayside.

Explanation:

So basically salt makes it strecthy! Please mark brainliest!!

Convert –26 degree Celsius temperature into kelvin .​

Answers

Just add 273 to turn it into Kelvin

Why is seawater and corn syrup denser than the egg? explain plz no link

Answers

Because seawater is made out of things that are natural and regular to the world such as water and salt.

Magnesium has three naturally occurring stable isotopes, 24Mg (abundance 78.99%), 25Mg (abundance 10.00%) and 26Mg (abundance 11.01 %). Calculate the relative atomic mass of magnesium, giving your answer to 2 decimal places.(2)

Answers

Explanation:

M = molar mass

p= percentage abundance

[tex]rel.atm.mass = \frac{ M1p1 + M2p2 + M3p3}{100} \\ r.a.m = \frac{24 \times 78.99 + 25 \times 10 + 26 \times 11.01}{100} \\ r.a.m = \frac{1895.76 + 250 + 286.26}{100} \\ = \frac{2432.02}{100} \\ 24.32[/tex]

BRAINLIST

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

Answers

Explanation:

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

Answer:

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Explanation:

where is your question?

which elements from the periodic table are the least reactive

Answers

Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level. This is the most stable arrangement of electrons, so noble gases rarely react with other elements and form compounds.

Group 18; The Noble Gases contains the elements on the periodic table that would be the least reactive out of all the elements. So, this include any gas element, such as helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og). Hence, if you have the options:

(The Option in Bold is Correct)

O the group with fluorine at the topO the group with carbon at the topO the group with helium at the topO the group with hydrogen at the top

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Hope this helps!

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How do catalysts generally affect chemical reactions? A They increase the temperature of the system. B They increase the surface area of the reactants. C They increase the activation energy by introducing enzymes. D They lower the activation energy by providing an alternate pathway.​

Answers

Answer:

D

Explanation:

A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy without itself being consumed by the reaction.

Activation energy is the minimum amount of energy required for a chemical reaction to proceed in the forward direction.

A catalyst increases the reaction rate by providing an alternative pathway or mechanism for the reaction

How to add moisture to the air without a humidifier?

Answers

There are quite a few ways to add moisture into the air without a humidifier

A few things that can help add moisture are hanging your clothing to dry. hang drying your damp clothes will add moisture to the air over time as it evaporates and it will make your house smell like fresh clothes.

Another thing is a bath,  allow the water to cool off and leave the bathroom door open, the steam will add moisture to the air as the water cools.

This might seem silly but putting bowls or vases of water out on the windowsill on a sunny day mill moistens the air as it evaporates.

You can also get houseplants, moisture evaporates from the leaves and stems of plants. transpiration can help increase the humidity in your home.

not sure if this is the answer you were looking for but if so im glad i could help. have a great day!

the number of neutrons in the nucleus of an atom can be determined by

Answers

Answer:

To calculate the number of neutrons, subtract the atomic number (which equals the number of protons) from the mass number.

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What makes a balloon electrically charged?

A. Adding more air to the balloon
B. Placing the balloon against a wall
C. Rubbing the balloon against your hair
D. Running water over the balloon

Answers

C. Rubbing the balloon against your hair

Answer:

C

Explanation:

running the balloon against your hair

Zn(s) + Cu2+ —> Zn2+(aq) + Cu(s)
In this reaction, copper __ electrons, therefore it is the __ agent.

A. loses, reducing
B. gains, oxidizing
C. loses, oxidizing
D. gains, reducing

Answers

Answer: do you guys know the answer

Explanation:

Answer:

gains,oxidizing

Explanation:

Zn(s) + Cu^2+---> Zn^2+(aq) + Cu(s)

I got the answer right on usatp.

Count the following atoms​
NEED ANSWER ASAP ​

Answers

Just use the subscripts
You have 4 hydrogens in one NH4 compound, and you have 3 NH4, so that gives you 12 H and 3 N.
You also have a coefficient of 2 in front of (NH4)3, so that means you would multiply 12 H atoms by 2 and 3 N by 2, giving you 24 hydrogen atoms and 6 nitrogen atoms.
You also have 1 Phosphorus atom, and 4 oxygen atoms, so now add all your individual atoms up:
24 hydrogen + 6 Nitrogen + 1 Phosphorus + 4 Oxygen = 35 atoms in total

What must desert plants do to survive?
Ostore rainwater
Ogrow very tall
have big leaves

Answers

Store rainwater, like a Cactus

A gas measures 140 mL at 400 K find its volume at 120 K if the pressure remains constant.

Answers

By applying Charles law, the final volume of the gas is equal to 42 mL.

Given the following data:

Initial volume = 140 mLInitial temperature = 400 KFinal temperature = 120 K

To find the final volume of the gas, we would apply Charles law:

Charles law states that when the pressure of an ideal gas is kept constant, the volume of the gas is indirectly proportional to the absolute temperature of the gas.

Mathematically, Charles law is given by the formula;

[tex]\frac{V}{T} =k\\\\\frac{V_1}{T_1} = \frac{V_2}{T_2}[/tex]

Where;

T is the temperature of an ideal gas.V is the volume of an ideal gas.

Substituting the given parameters into the formula, we have;

[tex]\frac{140}{400} = \frac{V_2}{120} \\\\140 \times 120 = 400V_2\\\\16800 = 400V_2\\\\V_2 = \frac{16800}{400}[/tex]

Final volume = 42 mL.

Read more on Charles law: https://brainly.com/question/22971882

why does C10H22 not conduct electricity

Answers

Answer:

Decane doesn't have any free electrons because all the electrons of carbon is used for bonding.

what happens to the 1s orbitals on the hydrogen atoms as they approach to make a covalent bond?

Answers

i dont know im only doing for points

Answer: They begin to overlap

what volume will 28.0 g of O2 occupy at STP?

Answers

Considering the definition of STP conditions, 28 grams of O₂ will ocupy at STP 19.6 L.

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

On the other side, the molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

In this case, you  have 28 g of O₂. The molar mass es 32 [tex]\frac{g}{mole}[/tex]

Next, you can apply the following rule of three: if 32 grams of the compound are contained in 1 mole, 28 grams are contained in how many moles?

[tex]number of moles=\frac{28 gramsx1 mole}{32 grams}[/tex]

number of moles= 0.875 moles

Now, you can apply the following rule of three: if by definition of STP conditions 1 mole of O₂ occupies a volume of 22.4 liters, 0.875 moles occupies how much volume?

[tex]volume=\frac{0.875 molesx22.4 L}{1 mole}[/tex]

volume= 19.6 L

Finally, 28 grams of O₂ will ocupy at STP 19.6 L.

Learn more:

https://brainly.com/question/3773297?referrer=searchResultshttps://brainly.com/question/9901446?referrer=searchResultsbrainly.com/question/12695086?referrer=searchResultshttps://brainly.com/question/15507610?referrer=searchResultshttps://brainly.com/question/14260169?referrer=searchResultshttps://brainly.com/question/14831640?referrer=searchResults

What is a material through which waves travel?
space
vibrations
motion
medium

Answers

Electromagnetic waves travel through space

HELP!!

Do you think the number of asteroid samples a pod is carrying could make a difference? Might that explain why the
same strength thruster force caused this pod to have a different change in velocity? Explain your ideas, even if you are
unsure

Answers

How does weight affect the speed of an object? Mass doesn't affect speed directly. It determines how quickly an object can change speed (accelerate) under the action of a given force. Lighter objects need less time to change speed by a given amount under a given force.

https://www.mvorganizing.org/does-the-weight-of-a-car-affect-its-speed/

If a feather and a bowling ball were dropped in a vacuum(only gravity effects the variables), they will hit the ground at the same time. So if the mass keeps changing it, and the pod keeps stopping at different points it will take longer to accelerate or decelerate. I’m not totally sure, but here is an answer.

Find the percent by mass concentration if the solution was prepared by dissolving 25.0 g of sugar into 100 g of water.

Answers

Answer:

25%

Explanation:

Percent by mass is looking at the percentage of mass within a a solution. So since there's 100g of water and 25 grams of sugar, you divide 25 by 100 to get the ratio. Then multiply by 100 to get the percentage.

how do you write the names and formulas for ionic compounds with polyatomics

Answers

Here are some steps i know from my teacher:

When you write a formula from a home you must follow these rules

1) Write down the name you must follow these rules

2)Write down the symbols for the elements and group in the compound of elements

3)Write down the valency

4)Adjust the number of atoms of each element or group valency is the combining capacity of elements with one another.

Explain why reaction speed increases with temperature.

Answers

as the reaction speed involves the overcoming of the activation energy (due to a required amount of kinetic energy between the particles). When temperature is increased it will provide more energy for the movement of the particles to gain more kinetic energy meaning the rate at which the particles interact increase

what causes chemical change in the stomach?

Answers

Answer:

The chemical change in the stomach, known as food digestion,  is from the enzymes in the liver and stomach where they break down food molecules into even smaller molecules in order for them to be digested more easily.

what will you observe when you open a bottle of concentrated hydrochloric acid?

Answers

Answer:

Strong affinity of HCl gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke.

Explanation:

#followformore

Hope this helps :)

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