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2 years ago

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Chemistry

2 answers:

AlexFokin [52]2 years ago

8 0

Suitable hypothesis for the experiment is as temperature increases rate of reaction also increases.

<h3>What is rate of reaction?</h3>

Rate of any reaction gives idea about the speed of the completion of that reaction.

Rate of reaction will be affected by many factors are some such factors are:

Dependent variable: Rate of change of the chemical species which are present in the reaction is the dependent variables.
Independent variable: Independent variable is temperature as it does not depends on the rate, in spite of this rate depends on temperature.
Controlled variables: Environment of the reaction, amount of catalyst, light exposure to the reactions are the controlled variables as it depends on the requirement of the amount of product.

Hence, hypothesis is as temperature increases rate of reaction also increases.

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Simora [160]2 years ago

8 0

Answer:

This is what I put on my test.

Explanation:

Hypothesis: as temperature increases, the rate at which chemical change occurs increases.

Dependent variable: rate of chemical change

Independent variable: Temperature

Controlled variables: light exposure, exposure to any other substance, sterile or contaminated environment

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A metamorphic rock can also be thought of as a rock that changes. What causes the rock to change?

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5 0

3 years ago

Read 2 more answers

The "break-even" interest rate for year n that equates the return on an n-period zero-coupon bond to that of an n - 1 - period z

kozerog [31]

The "break-even" interest rate for year n that equates the return on an n-period zero-coupon bond to that of an n - 1 - period zero-coupon bond rolled over into a one-year bond in year n is defined as the forward rate.

A forward rate is a specified price agreed by all parties involved for the delivery of a good at a specific date in the future. The use of forward rates can be speculative if a buyer believes the future price of a good will be greater than the current forward rate. Alternatively, sellers use forward rates to mitigate the risk that the future price of a good materially decreases.

Regardless of the prevailing spot rate at the time the forward rate meets maturity, the agreed-upon contract is executed at the forward rate. For example, on January 1st, the spot rate of a case of iceberg lettuce is $50. The restaurant and the farmer agree to the delivery of 100 cases of iceberg lettuce on July 1st at a forward rate of $55 per case. On July 1st, even if the price per case has decreased to $45/case or increased to $65/case, the contract will proceed at $55/case.

To extract the forward rate, we need the zero-coupon yield curve.

We are trying to find the future interest rate $r_{1,2}}{\displaystyle r_{1,2}$ for time period

$(t_{1},t_{2})}(t_1, t_2), {\displaystyle t_{1}}t_{1$ and $t_{2}}t_{2$ expressed in years, given the rate $r_{1}}r_{1$ for

time period ${\displaystyle (0,t_{1})}(0, t_1)$ and rate $r_{2}}r_{2$ for time period ${\displaystyle (0,t_{2})}(0, t_2)$ . To do this, we use the property that the proceeds from investing at rate $r_{1}}r_{1$ for

time period ${\displaystyle (0,t_{1})}(0, t_1)$ and then reinvesting those proceeds at rate

$r_{1,2}}{\displaystyle r_{1,2}$ for time period ${\displaystyle (t_{1},t_{2})}(t_1, t_2)$ is equal to the proceeds from

investing at rate $r_{2}}r_{2$ for time period ${\displaystyle (0,t_{2})}(0, t_2)$ .

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2 years ago

Problem

postnew [5]

Answer:

C) Potassium, K, and calcium, Ca

Explanation:

Given pair of elements:

Ni and Cu

Potassium and Ca

Nitrogen and oxygen

Solution:

We know that number of protons and number of electrons are always equal and number of electron or number of proton is called atomic number.

Number of protons given elements:

Ni number of protons = 28

Copper number of protons = 29

Combine number of protons = 57

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Ca number of protons = 20

Combine number of protons = 39

Ni number of protons = 7

O number of protons = 8

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Thus, option C is correct.

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3 years ago

Penny bought a club moss plant for her water garden. She needs to know how tall the plant will grow so she knows how much space

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The plant will grow less than 5 centimeters because it is a seedless, non-vascular plant. The correct option is B.

<h3>What are moss plants?</h3>

Moss plants are those plants that do contain seeds or flowering plants. They are non-vascular plants, and they maintain the moisture of the soils. They are very small plants.

Moss plants are small plants that grow in moist and humid conditions. They do not need so much sunlight. They will grow less than 5 centimeters and wet conditions.

Thus, the correct option is B. less than 5 centimeters because it is a non-vascular plant.

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1 year ago