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Lostsunrise [7]
2 years ago
9

What must be true about the matter at the start of a fire versus the end?

Chemistry
1 answer:
quester [9]2 years ago
5 0

Explanation:

Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.

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What does it mean to say an equation is balanced? Why is it important for an equation to be balanced?​
Rom4ik [11]

Answer: It is important for an equation to be balanced because if it is not then the reactants won't match the products.

Explanation: I don't know if you will understand this but here:

Let's say you're cooking eggs, you're reactants so to speak would be 3 eggs and 1 tablespoon of oil so you put it together using heat and a pan. Your products have to match what you have in the beginning. You cannot have an equation that looks like this

Reactants = 3eggs + 1Tbsp oil ---pan/heat---> 6eggs + 1 cup of oil

You cannot get something from what you don't have. The number of how much of an element you have must be the same of both sides of the equation.

8 0
1 year ago
The amount of energy required to heat water for a 10-minute shower (50 gallons) is 2.2125 kJ. How many calories is this?
Zigmanuir [339]
From the problem statement, this is a conversion problem. We are asked to convert from units of kilojoules to units of calories. To do this, we need a conversion factor which would relate the different units involved. We either multiply or divide this certain value to the original measurement depending on what is asked. From literature, we will find that 1 kilojoule is equal to 239 calories. We do as follows:
<span>
2.2125 kJ ( 239 calories / 1 kJ ) = 528.79 calories
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6 0
3 years ago
Which best evaluates the following statement: It's greener to wash dishes by hand than to use a dishwasher?
Volgvan

<span>It is true that energy efficient dishwasher is a water and energy saver than washing dishes by hand. A star-rated dishwasher uses 4 gallons of water in each cycle compare to a kitchen faucets who pumps out 2.5 gallons of water per minute. To conserve water, the accumulated dishes and cookware must be stack properly in a dishwasher before running a cycle. As to conservation of energy, people tend to use warm water to wash the dishes by hand and heating of water cost much, while in a dishwasher, energy-saving tips such as running a light cycle and turning off heating drying option will mark down your energy consumption. Therefore, the use of dishwasher is a much greener idea. </span>

3 0
3 years ago
Which of the following is a homogeneous mixture
Citrus2011 [14]

Answer:

Explanation:

A homogenous mixture is a mixture is the same throughout. Some examples are clean water, milk, oil, and food colouring.

8 0
3 years ago
Can someone help me please if you can’t do all 3 just do A and it’s not asking for the definition it’s asking what the air tempe
Anarel [89]

Answer:

the class so can be a doctor of this picture and u will be a good evening at your local time to learn more thing and learn new things given the promise season to get straight up from town and u get the dates you want be a little more thing to make chocolate vigaapan for Mason and u just don't have my breakfast recipesby in hindi d you

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