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3 years ago

How much would a 50-kg object weigh on Mercury (gravity on Mercury is 3.59 m/s2)?

1 answer:

4 0

Gravitational Acceleration or W=Mg so... Q1: W(earth)=50, W(X)=500 ---> g(X)=10*g(earth)=10*9.8=98 --> C is correct. Q2: M=W/g --> M=735/9.8=75 ---> B is correct. Q3: W=Mg=50*3.59=179.5 N ---> B is correct

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What is the composition of the nuclei modeled by these symbols? How many protons and neutrons?

gayaneshka [121]

There are six protons and eight neutrons present in the carbon atom as shown.

<h3>What is the nucleus?</h3>

The nucleus of an atom consists of its protons and its neutrons. The protons are positively charged while the neutrons have no charge.

From the symbol of the element as shown in the question, we can see that there are six protons and eight neutrons present.

Learn more about nucleus of atoms:brainly.com/question/10658589

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2 years ago

How many neutrons does element X have if its atomic number is 44 and its mass number is 151?

Phoenix [80]

To find the number of neutrons, you subtract the atomic number from the mass number of element X. So in this case, it'll be 151-44= the number of neutrons.

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3 years ago

When nad becomes nadh, it is being? oxidized and releasing chemical energy. reduced and gaining chemical energy. oxidized and ga

3241004551 [841]

When NAD becomes NADH, it is being reduced and gaining chemical energy.

Nicotinamide adenine dinucleotide (NAD), a coenzyme, can exist in two forms, NAD⁺ (oxidized) and NADH (reduced form).

Electrons and protons released in catabolism reactions are attached to NAD⁺. The conversion of NAD⁺ to NADH is important reaction for production of ATP during the cellular respiration.

Reduction is lowering oxidation number because element, ion or compound gain electrons.

Chemical equation for reaction of reduction of NAD⁺ (see picture below):

NAD⁺ + 2e⁻ + H⁺ → NADH

Nicotinamide adenine dinucleotide (NAD) is made of two nucleosides joined by pyrophosphate.

More about reduction :brainly.com/question/25334331

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1 year ago

Consider the mechanism. step 1:step 2:overall:2a⟶bb c⟶d2a c⟶dslowfast determine the rate law for the overall reaction, where the

Ne4ueva [31]

Answer:

Rate: R = k [A]²

Explanation:

The rate law equation for a given complex chemical reaction is given as the product of molar concentrations of the reactant raised to the power their respective partial reaction orders. The sum of the partial reaction orders is equal to the overall order of reaction.

For a complex reaction, the rate law is generally determined by the slowest step, which is known as the rate-determining step.

Given reaction mechanism:

Step 1: 2 A⟶ B, slow step

Step 2: B+ C⟶ D, fast step

Overall: 2 A + C ⟶ D

In this given reaction mechanism, the step 1 is the slow step and thus the rate determining step.

Therefore, the rate law for the given mechanism is:

Rate: R = k [A]²

Here, k is the overall rate constant

Also, the overall order of the reaction = 2

Therefore, the given chemical reaction is said to be second order reaction.

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3 years ago

What process is involved in releasing stored energy from the stored fuel molecules?

Ivanshal [37]

Answer: "exothermic" .
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3 years ago

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