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3 years ago

In 1-2 sentences, explain why weather can be predicted only as probable, not definite. (2 points) Plaese help me

1 answer:

8 0

Weather can be predicted only as probable, not definite because the daily weather conditions depends on winds and storms.

It is common observation that weather forecasts are often given as a probability and never in definite terms.

This is because, the weather condition at anytime depends on the temperature of the earth's atmosphere which causes air masses to move leading to wind.

The temperature of the earth's atmosphere changes frequently hence weather conditions also change frequently.

Learn more: brainly.com/question/21209813

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That will be letter B which is Cu

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In this simulation, ___________________ will be used to stimulate the axon.

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3 years ago

Determine the mass of oxygen that is needed to react with 33 grams of phosphorus.

Kipish [7]

Answer:

D = Mass = 42.6 g

Explanation:

Given data:

Mass of phosphorus react = 33 g

Mass of oxygen needed = ?

Solution:

Chemical equation:

4P + 5O₂ → 2P₂O₅

Number of moles of phosphorus:

Number of moles = mass/molar mass

Number of moles = 33 g/ 30.97 g/mol

Number of moles = 1.065 mol

now we will compare the moles of phosphorus and oxygen.

P : O₂

4 : 5

1.065 : 5/4×1.065 = 1.33mol

Mass of oxygen needed:

Mass = number of moles × molar mass

Mass = 1.33 mol × 32 g/mol

Mass = 42.6 g

Thus, 43.6 g of oxygen needed to react with 33 g of phosphorus.

8 0

3 years ago

2 H2O2(aq)-> 2H20(l) + O2(g) ΔΗ -196 kJ/molrun The decompostion of H202(aq) is represented by the equation above. A student m

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Answer:

the approximate pressure in the flask after 400. s = 1.2atm

Explanation:

The detailed explanation is shown below

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3 years ago

During the reaction P4 + 5O 2 P4 O10, 1.5 moles of product was made in 30 seconds. What is the rate of reaction?

Brut [27]

Answer:

850g/min

Explanation:

The reaction expression is given as:

P₄ + 5O₂ → P₄O₁₀

Given that:

Number of moles of product = 1.5moles

Time = 30s = 0.5min

Unknown:

The rate of the reaction = ?

Solution:

Convert the moles given to mass of the product.

So;

Mass of product = number of moles x molar mass

Molar mass of P₄O₁₀ = 4(31) + 10(16) = 284g/mol

Mass of product = 1.5moles x 284g/mol = 426g

So;

Reaction rate = $\frac{mass of product}{time}$ = $\frac{426}{0.5}$ = 850g/min

8 0

3 years ago

In 1-2 sentences, explain why weather can be predicted only as probable, not definite. (2 points) Plaese help me ​

In 1-2 sentences, explain why weather can be predicted only as probable, not definite. (2 points) Plaese help me