Draw the circuit symbol that would represent the 9V battery

Which of the following forms of invisible light, would have the highest wavelength?

musickatia [10]

Answer:

you snap chatting your friends

Explanation:

The waves that will have the highest wavelength from the given choices is by snap chatting with your friends.

Snap chatting involves the use of radio waves.
Radio-waves are a part of electromagnetic waves and they have very long wavelength.
It is used in radio communications as in mobile phones.
x-rays have the shortest wavelength of all the waves.

5 0

2 years ago

For a certain reaction A → products a plot of ln[A] vs. time produces a straight line with a slope of −3.0×10−2 s−1. Which of th

Zarrin [17]

Answer:

Statements I and II are true.

Explanation:

Let us consider the reaction A → products.

Which of the following statements is or are true?

I. The reaction follows first-order kinetics. TRUE

The expression for a first-order reaction is:

ln[A] = ln[A]₀ - k.t [1]

where,

[A] is the concentration of the reactant A at certain time t

[A]₀ is the initial concentration of A

k is the rate constant

t is the time

If the plot of ln[A] vs. t A is a straight line, it means that the reaction follows a first-order kinetics.

II. The rate constant for the reaction is 3.0×10⁻² s⁻¹. TRUE.

In [1], ln[A]₀ is the intercept and -k the slope of the linear equation. Thus,

-k = −3.0×10⁻² s⁻¹

k = 3.0×10⁻² s⁻¹

III. The initial concentration of [A] was 1.0 M. FALSE.

Since we do not have information about the intercept in the plot of ln[A] vs. t, we do not have enough information to calculate the initial concentration of A.

Statements I and II are true.

3 0

2 years ago

Fill in the word that completes each sentence. Food contains a sugar called , which is broken down in a process called cellular

Pie

Answer:

glucose

respiration

oxygen

Explanation:

7 0

2 years ago

Read 2 more answers

Water, H2O, is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared __________

adell [148]

Oxygen and hydrogen share electrons in the molecule of water to form covalent bonds.

<h3>What kinds of bonds exist?</h3>

Covalent bonds: These are formed between nonmetals and electrons by sharing electrons.
Ionic bonds: These are formed between metals, which lose electrons, and nonmetals, which gain electrons.
Metallic bonds: There are formed between metals. Electrons are delocalized in a cloud.

Water, H₂O, is a molecule made of 2 nonmetals: oxygen and hydrogen. The bonds that hold water molecules together are due to shared electrons, and known as covalent bonds.

Oxygen and hydrogen share electrons in the molecule of water to form covalent bonds.

Learn more about chemical bonds here: brainly.com/question/6071754

5 0

2 years ago

A tetraphenyl phosphonium chloride (TPPCl) powder (FW=342.39) is 94.0 percent pure. How many grams are needed to prepare 0.45 L

slega [8]

Answer:

5.41 g

Explanation:

Considering:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

Or,

$Moles =Molarity \times {Volume\ of\ the\ solution}$

Given :

For tetraphenyl phosphonium chloride :

Molarity = 33.0 mM = 0.033 M (As, 1 mM = 0.001 M)

Volume = 0.45 L

Thus, moles of tetraphenyl phosphonium chloride :

$Moles=0.033 \times {0.45}\ moles$

Moles of TPPCl = 0.01485 moles

Molar mass of TPPCl = 342.39 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$0.01485\ g= \frac{Mass}{342.39\ g/mol}$

Mass of TPPCl = 5.0845 g

Also,

TPPCl is 94.0 % pure.

It means that 94.0 g is present in 100 g of powder

5.0845 g is present in 5.41 g of the powder.

<u>Answer - 5.41 g</u>

5 0

3 years ago