All categories

3 years ago

Which of the following statements is true?

Chemistry

2 answers:

Sonbull [250]3 years ago

6 0

Answer:

D. Solids have a fixed mass, volume, and shape

Explanation:

solid have fixed volume, mass and shape due to this they are closely packed.

The molecules in the solid stay in fixed points and they are tight together.

Dalton explained that all the elements are made up of atoms.

Plasmas contain both positive ions and negative charges in equal quantity.

The number of protons in an element is always equal to the number of electrons.

Thus option(D) Solids have a fixed mass, volume, and shape is the correct answer.

Hitman42 [59]3 years ago

5 0

I guess its D.hope this helps....sorry if i'm wrong.

You might be interested in

HELPPPP. SHOW WORK

nekit [7.7K]

I think The answer to two is it would sink

7 0

3 years ago

What are the good and bad effects of bacteria

sergiy2304 [10]

Answer:

they are bacteria

Explanation:

7 0

3 years ago

Read 2 more answers

What does the rate law tell you about a reaction?

natta225 [31]

Answer:

A. How the concentration of the reactants affects the rate of a reaction

Explanation:

Let's consider a generic reaction.

A + B ⇒ Products

The generic rate law is:

rate = k × [A]ᵃ × [B]ᵇ

where,

rate: rate of the reaction

[A] and [B]: molar concentrations of the reactants

k: rate constant

a and b: reaction orders

As we can see, the rate law shows how the concentration of the reactants affects the rate of a reaction.

8 0

3 years ago

What is the maximum number of moles of NaCl that can be produced from the reaction of 5.6 mol Na and 4.7 mol CI2?

RideAnS [48]

Answer:

Explanation:

Na + Cl2 —> NaCl

8 0

3 years ago

A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a

torisob [31]

Answer:

C) $k_a=1.3\times 10^{-5}$

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

$pH=-log(\sqrt{k_a\times C})$

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, $Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M$

C = 0.100 M

$2.94=-log(\sqrt{k_a\times 0.100})$

$\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94$

$\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}$

$k_a=1.3\times 10^{-5}$

4 0

3 years ago