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4 years ago

3y= 4y^3Write a verbal sentence to represent each equation.

Chemistry

1 answer:

lions [1.4K]4 years ago

4 0

Answer:

See explanation

Explanation:

To write a verbal sentence to represent an equation, we must look at the equation closely in order to capture its essence.

For this equation, 3y= 4y^3, we can write it in words as:

Three multiplied by y is equal to four multiplied by y raised to power three.

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a 150 g sample of water (initially at 45 C) is mixed with an unknown mass of water (initially at 84 C). the final temperature of

Evgesh-ka [11]

Answer : The unknown mass of water is, 200.3 grams.

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

$q_1=-q_2$

$m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)$

As,

$c_1=c_2$ = specific heat water

So,

$m_1\times (T_f-T_1)=-m_2\times (T_f-T_2)$

where,

$m_1$ = mass of water = 150 g

$m_2$ = mass of unknown water = ?

$T_f$ = final temperature of mixture = $67.3^oC$

$T_1$ = initial temperature of water = $45^oC$

$T_2$ = initial temperature of unknown water = $84^oC$

Now put all the given values in the above formula, we get

$150g\times (67.3-45)^oC=-m_2\times (67.3-84)^oC$

$m_2=200.3g$

Therefore, the unknown mass of water is, 200.3 grams.

3 0

4 years ago

What is the predicted outcome for very low mass stars (those that are smaller than about the mass of the sun)?

White raven [17]

Answer:

In case of low-mass stars,the outer layers of the low mass stars are expelled as the core collapses such that the outer layers form a planetary nebula.

Explanation:

In case of low-mass stars,the outer layers of the low mass stars are expelled as the core collapses such that the outer layers form a planetary nebula. The core remains as a white dwarf and finally become a black dwarf as it cools down. A low mass star consumes its core hydrogen and turns it into helium over its lifetime.

4 0

3 years ago

Which reaction most accurately represents the dissociation of nitrous acid (hno2) in water?

yanalaym [24]

When nitrous acid (HNO₂) dissociates in water (H₂O), the reaction that best captures this process is:

HNO₂ (aq.) + H₂O ↔ H₃O⁺ (aq.) + NO₂⁻ (aq.)

How does one know about HNO₂?

The chemical designation for nitrous acid is HNO₂, and it is a monoprotic acid. Three elements—hydrogen(H), oxygen(O), and nitrogen(N), all compose it.
It is highly fragile in nature and only occurs in solutions.
It is employed to convert amines into diazonium salts.

Is HNO₂ a basic or an acid?

Acidity is assigned to nitrous acid (HNO₂). Once dissolved in water, it gives out H+ ions. Acid is a chemical that produces H+ ions in a water-based solution or gives the protons to other molecules.

Thus, HNO₂ is acid because it causes a mixture of water to contain H+ ions. In a 10 mM concentration, it possesses a pH of 2.67.

Learn more about nitrous acid here:

brainly.com/question/17055219

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