Help needed ASAP, I will mark your answer as brainliest.

Answer:

1.6 M/min

Explanation:

Step 1: Given data

Step 2: Convert "t" to min

We will use the conversion factor 1 min = 60 s.

15 s × 1 min/60 s = 0.25 min

Step 3: Calculate the reaction rate

We will use the following expression.

r = -ΔC/t

r = -(0.6 M - 1 M)/0.25 min = 1.6 M/min

I believe it's (A). It will double.

Explanation:

Charles law states that the volume of an ideal gas is directly proportional to the absolute temperature at constant pressure. (Charles's law).

The pressure, volume, and temperature are the main factors of the ideal gas. At constant pressure when the temperature is doubled, then volume also gets doubled. Thus, option A is correct.

The ideal gas law has been known as the law that relates the pressure, volume, moles, and temperature of the gas particles. The relationship between the volume and the temperature of the gas was given by Charle's law.

According to Charle's law, the volume and the temperature have been known to have direct relation when the factor of pressure is said to be constant. If they exhibit the direct relation then doubling the temperature will double the volume of the gas.

Therefore, option A. the doubling of temperature doubles the volume is correct.

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Answer:

12  My     Magnesium

13 Al Aluminum

19 K Potassium

20 Ca Calcium

Explanation:

I think

Answer: The conclusion that best support the observation is that (A CHEMICAL CHANGE took place).

Explanation:

A chemical reaction is defined as the process by which two or more substances, which are often referred to as REACTANTS, combine through bond formation or dissociation of bonds to form new PRODUCTS. In this type of reaction, a CHEMICAL CHANGE occurred because a new substance is formed as a result of the chemical reaction that took place.

There are different characteristics of a reaction which shows that a chemical change has occurred, these includes:

--> Color Change

--> Production of an odor

--> Change of Temperature

--> Evolution of a gas (formation of bubbles)

-- Precipitate (formation of a solid)

From the chemical reaction in the given question, Lithium metals reacts slowly with water to form a colourless solution of lithium hydroxide (LiOH) and hydrogen gas (H2). Here we observe that the buzzing sound of formed gas bubbles shows that a gas was given off. Therefore in conclusion, a CHEMICAL CHANGE took place.

Answer:

d

Explanation:

from you know the atomic number it should be easy to find

To determine the molar mass of an element, one must know the element's atomic number​. Therefore, option D is correct.

An element's atomic number (Z) is the number of protons in the nucleus of each atom of that element. This means that the number of protons is the feature that distinguishes each element from all others. Elements differ based on their atomic number.

Because the combined masses of protons and neutrons account for nearly all the mass of a given atom, the atomic mass of a single atom can be calculated by adding the total number of protons and neutrons of that particular isotope.

The atomic mass of any element on the periodic table can be used to calculate its molar mass.

Thus, option D is correct.

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Answer:

D. the capacity to do work

Explanation:

the basic definition of energy is the ability to do work

Answer:

-2

The charge on an oxygen ion is -2. An oxygen atoms contain six electrons in its valence electron shell.

Explanation:

Sodium Carbonate, Sodium Bicarbonate or Sodium Hydroxide.

Answer:    

Explanation:      

The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes.

Answer:

its false..

Explanation:

pure water is an excellent insulator and does not conduct electricity. The thing is, you won't find any pure water in nature, so don't mix electricity and water.

hope it helps.

Answer:

False

Explanation:

Pure water does not conduct electricity. This is because pure water do not contain any salts. Pure water can conduct electricity when common salt is added to it, as salt solution is conducting in nature.

Answer:

second one

Explanation

Explanation:

yes that's correct

Explanation:

E maybe i am not sure or C

Answer:

dude! it's static!

Explanation:

a dry cell can't function and is therefore static!

Answer:

The correct answer is - reduce carbon emission, decrease deforestation snd increase plantation, use renewable energy.

Explanation:

Global warming is the process that is caused by human activities to increase the temperature of the earth. It increases the heat of the climate of the earth that leads to a negative impact on the environment. Increasing the greenhouse gas emission leads to trapping heat and cause global warming.

The three major solutions are:

1. reduce carbon and greenhouse gases: The main cause of global warming is the emission of greenhouse gases and an increase in carbon in the atmosphere, so reduce these gas emissions by avoiding fossil fuels that release carbon.

2. reduce deforestation and increase the plantation: trees take carbon dioxide from the environment, So prevent them from cutting and planting new trees will help reducing carbon from the environment.

3. Using renewable energy will help them to not depend on fossil fuels or water waste that will help in reducing global warming.

439.3 g CO2

Explanation:

First find the # of moles of CO2 that results from the combustion of 3.327 mol C3H6:

3.227 mol C3H6 × (6 mol CO2/2 mol C3H6)

= 9.981 mol CO2

Use the molar mass of CO2 to determine the # of grams of CO2:

9.981 mol CO2 x (44.01 g CO2/1 mol CO2)

= 439.3 g CO2

5) B

6) C

7) B newland, law of octaves

8) A)

Answer:

the answer is B

Explanation:

the ice puts 8ts cold into the water taking it away from the ice

Answer:

d

Explanation:

It is 1+ because when the periodic table is drawn well into there groups become cations

Answer:

Sediment to sedimentary rock (and vice versa) is Compactation and Cementation.

Explanation:

This happens via Lithification, which is the compacting of sediments under pressure.

Answer:

Molecule

Explanation:

when two or more than two non-metal elements are combined then it form Molecule.

What is genetic modification (GM) of crops and how is it done? GM is a technology that involves inserting DNA into the genome of an organism. To produce a GM plant, new DNA is transferred into plant cells. Usually, the cells are then grown in tissue culture where they develop into plants.

Answer:

GM is a technology that involves inserting DNA into the genome of an organism. To produce a GM plant, new DNA is transferred into plant cells. Usually, the cells are then grown in tissue culture where they develop into plants. The seeds produced by these plants will inherit the new DNA.

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[tex]{\green{\dashrightarrow}}[/tex]Self-heating cans work through an exothermic chemical reaction between two chemicals. Popular combinations are aluminum and silica, calcium oxide and water, and copper sulfate and zinc. When the two substances combine, the reaction produces enough heat to raise the temperature of the can.

Answer:

energy stored is potential.

Explanation: