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DIA [1.3K]
3 years ago
11

I need help on scienceI have a 89 on my report card for science and I need to get it to a 98

Chemistry
1 answer:
Hunter-Best [27]3 years ago
8 0
Sorry but I only know a few
17- decomposers
18- decomposition
21- 10% is lost so 90%
You might be interested in
Describe how you can figure out how many grams of a COMPOUND if you know how many moles there
____ [38]
Divide the mass of the compound in grams by the molar mass you just calculated. The answer is the number of moles of that mass of compound. For example, 25 grams of water equals 25/18.016 or 1.39 moles.
4 0
2 years ago
What kind of reaction does Iron (III) and copper (II) sulfate solution produce?
ivanzaharov [21]

Answer:

The answer to your question is Single replacement

Explanation:

Types of reaction in Chemistry

Synthesis           two or more reactants combine to produce one single product

Decomposition      one reactant splits producing two or more products

Single replacement  One element replaces a similar one in a compound.

Double replacement Two compounds interchange their cations and anions.

Combustion one compound reacts with oxygen to produce carbon dioxide and water.

Reaction given

                      Fe⁺²  +  CuSO₄  ⇒   Cu + FeSO₄

This is a single replacement reaction

4 0
3 years ago
Read 2 more answers
Decide whether the compound is ionic or molecular, if you can.
mestny [16]

Answer:

Molecular solid

Explanation:

A molecular solid has a low melting point, they are soft and do not conduct electricity.

We have been told in the question that the solid does not really dissolve in water and it's solution does not improve the electrical conductivity of water. Hence, it must be a molecular solid.

7 0
2 years ago
What is the average yearly rate of change of carbon-14 during the first 5000 years?
erica [24]

Answer:

The average yearly rate of change of carbon-14 during the first 5000 years = 0.0004538 grams per year

Explanation:

Given that the mass of the carbon 14 at the start = 5 gram

At the end of 5,000 years we will have;

A = A_0 \times e^{-\lambda \times t}

Where

A = The amount of carbon 14 left

A₀ = The starting amount of carbon 14

e = Constant = 2.71828

T_{1/2} = The half life

\lambda = 0.693/T_{1/2}

t = The time elapsed = 5000 years

λ = 0.693/T_{1/2} = 0.693/5730 = 0.0001209424

Therefore;

A = 5 × e^(-0.0001209424×5000) = 2.7312 grams

Therefore, the amount of carbon 14 decayed in the 5000 years is the difference in mass between the starting amount and the amount left

The amount of carbon 14 decayed = 5 - 2.7312 = 2.2688 grams

The average yearly rate of change of carbon-14 during the first 5000 years  is therefore;

2.2688 grams/(5000 years) = 0.0004538 grams per year

The average yearly rate of change of carbon-14 during the first 5000 years = 0.0004538 grams per year.

5 0
3 years ago
1. What is the flame color of sodium?<br> yellow-orange<br> purple<br> green<br> blue-green
juin [17]

Orange is the color of Sodium

4 0
3 years ago
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