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3 years ago

Will mark as brainliest

Chemistry

2 answers:

tekilochka [14]3 years ago

7 0

C. The plant uses sunlight for energy

expeople1 [14]3 years ago

4 0

The answer is C

because plants use light energy from the sun to make their own food providing energy. The food created is a type of sugar.

This would make it definitely not A or D. The only answers left would be B and C but, technically the sunlight doesn't deliver the sugar straight to the plant so I'd go with C.

Hope that his helped!

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The diagonals of a rhombus are 6 and 8. The area of the rhombus is 20 24 48

Serhud [2]

Answer:

= 24 square units

Explanation:

The area of a rhombus is given by the formula;

Area = pq/2

Where p and q are the diagonals of the rhombus.

In this case; p = 6 and q = 8

Therefore;

Area = (6×8)/2

= 24 square units

6 0

3 years ago

Read 2 more answers

What is the reaction for CL^2 + 2 KBr —> 2 KCL+Br^2 of 11 grams of potassium bromide?

mylen [45]

Answer:

All the amounts of reactants and products are:

KBr

11.0g (given)

0.0924 mol

Cl₂

0.0462 mol

3.28g

KCl

0.0924 mol

6.89 g

Br₂

0.0462 mol

7.39 g

Explanation:

1. Balanced chemical equation (given)

$Cl_2+2KBr\rightarrow 2KCl+Br_2$

2. Mole ratios

$\dfrac{1molCl_2}{2molKBr}$

$\dfrac{2molKCl}{2molKBr}$

$\dfrac{1molBr_2}{2molKBr}$

3. Molar masses

Molar mass Cl₂: 70.906g/mol

Molar mass KBr: 119.002 g/mol

Molar mass KCl: 74.5513 g/mol

Molar mass KBr: 159.808 g/mol

4. Convert 11 grams of potassium bromide to moles:

#moles = mass in grams / molar mass

#mol KBr = 11g / 119.002g/mol = 0.092435mol KBr

5. Use the mole ratios to find the amounts of Cl₂, KCl, and Br₂

a) Cl₂

$\dfrac{1molCl_2}{2molKBr}\times 0.092435molKBr=0.0462molCl_2$

$0.0462175molCl_2\times 70.906g/molCl_2=3.28gCl_2$

b) KCl

$\dfrac{2molKCl}{2molKBr}\times0.092435molKBr=0.0924molKCl$

$0.092435molKCl\times 74.5513g/molKCl=6.89gKCl$

c) Br₂

$\dfrac{1molBr_2}{2molKBr}\times 0.092435molKBr=0.0462molBr_2$

$0.0462175molBr_2\times 159.808g/molBr_2=7.39gBr2$

The final calculations are rounded to 3 sginificant figures.

3 0

4 years ago

For the reaction:

vekshin1

Answer:

0-77.3kj/mol

Explanation:

add all of the mole

3 0

3 years ago

Which is a chemical property of oxygen?

Troyanec [42]

Answer: I think the answer is 1

i just learned this about two weeks ago

Explanation:

5 0

4 years ago

Read 2 more answers

Is light made up of atoms and elements?•Explain the relationship between matter, atoms, and elements.. •Distinguish between elem

Mars2501 [29]

Is light made up of atoms and elements?

- Light is made of photons that have no rest mass and exist as an electromagnetic ripple in space-time. So No Light is Not Made Out Of elements and atoms.

Explain the relationship between matter, atoms, and elements

- An element is a basic substance that other things are composed from. Each individual element is made up of tiny, invisible particles called atoms. An atom is the smallest unit of an element that has that element's properties. Both atoms and elements are matter.

Distinguish between elements and compounds

- A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom.Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds.

Describe molecules, and explain how they are formed

- A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements.

Interpret and write some common chemical formulas
- CO2: The C indicates that it has one carbon atom.The O2 indicates that it has two oxygen atoms.Note that the subscript, in this case 2, is only for the oxygen atom just before it. It does not affect the carbon atom.
- 2NH3: For each NH3 molecule, the N indicates that it has one nitrogen atom and the H3indicates that it has three hydrogen atoms.The number 2 in front (called the coefficient) indicates that there are two NH3molecules.So, in total, there are two nitrogen atoms and six hydrogen atoms.

Categorize materials as pure substances or mixtures
- Firstly, a pure substance is matter which cannot be separated into any other kind of matter when using the physical or chemical process. All the particles which make up a pure substance have the same color, taste, composition and texture. In other words, it can be an element or a compound, which consists of only one component with a definite composition, chemical and physical properties.

Secondly, a mixture is a combination of two or more substances which are not united using a chemical procedure. The components that make up a mixture do not exist in fixed proportions, and most of the natural substances that you are familiar with, are mixtures. Examples of mixtures include water, alcohol, oil, and dye.

So what are the distinct differences between these two? With regards to a mixture, it can be physically separated into pure compounds or elements. This is something that is not possible with a pure substance, because it is already a type of matter which exists in its most basic, or purest form.

Another distinct characteristic of a pure substance is that, no matter how physically impossible it may be to isolate a pure substance, it can only be considered as pure if no impurities are detected. When it comes to their physical properties, such as their boiling or melting points, pure substances are non-changing, while mixtures are varying. For example, the boiling point of pure water is at 100 degrees Celsius, while the boiling point of alcohol mixed with water may be at a range of temperatures. To put it simply, pure substances are exactly what the name implies – pure, while mixtures are impure.

4 0

3 years ago