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Answer:

the answer to this is non impact

Answer:

Change in temperature = ΔT = 26.8°C

Explanation:

Given data:

Heat absorbed = 600 j

Mass = 25.0 g

Specific heat capacity = 0.897j /g°C

Change in temperature = ΔT= ?

Solution:

Formula:

q = mcΔT

600 j =  25.0 g ×0.897 j/g°C×ΔT

600 j =  22.425 j/°C×ΔT

ΔT = 600 j /22.425 j/°C

ΔT = 26.8°C

Answer:

II and IV.

Explanation:

To know which option is correct, do the following:

Energy (E) and frequency (f) are related by the following equation:

E = hf

Where:

E is the energy.

h is the Planck's constant.

f is the frequency.

From the equation E = hf

Energy is directly proportional to the frequency. This implies that an increase in the frequency will also increase the energy and a decrease in the frequency will also decrease the energy.

Therefore, (II) in the question above is correct.

Velocity (v), wavelength (λ) and frequency (f) are related by the following equation:

v = λf

Divide both side by λ

f = v/λ

Thus, we can see clearly that the frequency is inversely proportional to the wavelength. This means that an increase in frequency will decrease the wavelength and a decrease in frequency will increase the wavelength.

Therefore, (IV) in question above is correct.

Thus, II and IV are the correct answers.

Answer:

AWAWDWDAD

Explanation:

Answer:

a plus sign: +

Explanation:

a plus sign is used to separate one reactant or product from another

Answer:

(Chemical Formulas test)

1.Which formula contains a metal and a nonmetal?

answer:(MGO)

2.Which formula represents a covalent compound?

answer:(H2O2)

3.In the formula for water (H2O), what does the lack of a subscript after the O indicate? answer:(There is one oxygen atom in the compound.)

4.What symbol is used to separate the products from each other or the reactants from each other in a chemical reaction?answer: (A PLUS SIGHN)

5.Which option is a covalent compound?

answer:(NO2)

Explanation:

Took the Test and got 100% thank me later

Answer:

The correct answer is "The β-sheet is a type of secondary structure that fulfills the hydrogen bonding requirements of amino acid side chains".

Explanation:

Hydrogen bonding are among the most common chemical bonds that occur between amino acids, where one atom of an amino acid acts as an hydrogen donor and the other acts as hydrogen acceptor. It is not true that β-sheet fulfills the hydrogen bonding requirements of amino acid side chains. β-strands are directional and form hydrogen bonds in antiparallel, parallel, or mixed arrangements. In the parallel form adjacent amino acids do not form hydrogen bonds, but they bond with the residues that flank the other.

The statement related to β-sheet that is considered to be false is that it should be the type of the secondary structure.

It is the bonding that should be arise mainly with the chemical bonds that lies between the amino acids where one atom should be acted as the donor of hydrogen and the other should be like an acceptor of hydrogen. Also, β-strands should be considered as directional and create the hydrogen bonds in the anti-parallel or mixed arrangements.

Learn more about bonds here: https://brainly.com/question/17957192

Answer:

a) 0.30

Explanation:

Kc = [C] [D] / ([A] [B])

Set up an ICE table:

[tex]\left[\begin{array}{cccc}&Initial&Change&Equilibrium\\A&0.4&-x&0.4-x\\B&0.4&-x&0.4-x\\C&0&+x&x\\D&0&+x&x\end{array}\right][/tex]

Plug in values and solve:

9 = x² / (0.4 − x)²

3 = x / (0.4 − x)

1.2 − 3x = x

1.2 = 4x

x = 0.3

Answer:

[tex]Fe_3PO_4[/tex]

Explanation:

To do this, we find the moles of each element. We get around 0.155 moles of Fe, 0.051 moles of P, and 0.206 moles of O. We then divide each one by the smallest one (which is 0.051 moles of P). We then get 3 for Fe, 1 for P, and 4 for O. This correlates to the empirical formula of the compound.

The empirical formula for the compound is [tex]Fe_3PO_4[/tex] if a 13.58 g sample of a compound contains 8.67 g of iron, Fe, 1.60 g of phosphorus, P, and oxygen, O.

An empirical formula tells us the relative ratios of different atoms in a compound.

We need to calculate the number of moles:

Given data:

Mass of iron - 8.67 g

Mass of phosphorus -1.60 g

Mass of oxygen -3.31 g

Moles of iron - [tex]\frac{mass}{molar \;mass}[/tex]

Moles of iron - [tex]\frac{8.67 g}{56 g/mol}[/tex]

0.15 mole

Moles of phosphorus [tex]-\frac{mass}{molar \;mass}[/tex]

Moles of phosphorus -  [tex]\frac{1.60 g}{31 g/mol}[/tex]

0.051 moles

Moles of oxygen -[tex]\frac{mass}{molar \;mass}[/tex]

Moles of oxygen - [tex]\frac{3.31 g}{16 g/mol}[/tex]

0.20 moles

Dividing each mole using the smallest number that is divided by 0.051 moles.

Fe:P:O :: 3:1:4

The empirical formula for the compound is [tex]Fe_3PO_4[/tex].

Learn more about empirical formula here:

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I'm pretty sure its momentum

Explanation:

a)3 N

b)2 P4

hope it will help u

Explanation:

Some examples of colorful light emissions are street lights, neon signs and, of course, fireworks. Neon signs emit light when an electric current passes through the neon gas.

Answer: I believe that it’ll be 284.45

Explanation:

May have to double check but I’m pretty sure that’s correct sorry if it’s not

Answer:

erosion can be reduced by planting trees and other plants

Answer:

A

Explanation:

Answer:

Depends on if the atoms have the same amount of atomic mass and if they have the same amount of ions, or none at all.

Explanation:

They can be the same atom, but if they don't have the same amount of protons, electrons, and neutrons, they aren't identical.

Answer:

Students heat up a metal sample by placing it into a test tube suspended in boiling water. Since the water is boiling, the metal evnetually reaches the same temperature as the boiling water: 100oC. ... Putting the metal sample directly into the water – obviously – gets it wet.

The metal is heated in a dry test tube in order to measure the capacity of the metal.

When performing a chemical experiment, it is important to

Instead of putting the metal straight into the boiling water, it is necessary to measure the capacity by heating it in a dry test tube first.

Read more here:

https://brainly.com/question/20552555

Answer:

It is the second answer; A dark solid formed on the zinc.

Explanation:

This is the correct answer because when a solid is formed it is called a precipitate, which is commonly known as a chemical reaction.

The evidence that supports the student's inference is a dark solid formed on the zinc.

When zinc is added to copper sulphate (CuSO4) solution, due to more reactivity of zinc, copper is replaced by zinc and forms zinc sulphate precipate.

Thus, the student is correct, there will be a chemical reatcion between the zinc and  copper sulphate (CuSO4) solution, producing a dark solid substance.

Learn more about chemical reaction here: https://brainly.com/question/26018275

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Answer:

Explanation:

moles

bonding

balancing equations

and set ups

Answer:

1.55×10²² molecules.

Explanation:

We'll begin by calculating the number of mole in 5.32 g of pure lead (Pb). This can be obtained as follow:

Mass of Pb = 5.32 g

Molar mass of Pb = 207 g/mol

Mole of Pb =?

Mole = mass /molar mass

Mole of Pb = 5.32/207

Mole of Pb = 0.0257 mole

Finally, we shall determine the number of molecules in 0.0257 mole of Pb. This can be obtained as follow:

From Avogadro's hypothesis,

I mole of Pb contains 6.02×10²³ molecules.

Therefore, 0.0257 mole will contain = 0.0257 × 6.02×10²³ = 1.55×10²² molecules.

Therefore, 5.32 g of pure lead (Pb) contains 1.55×10²² molecules.

Answer:

PF3 has a trigonal pyramidal molecular geometry.

Explanation:

PF3 has four regions of electron density / electron clouds around the central P atom. The regions of electrons make a tetrahedral arrangement with a bond angle of 109.5°. Only three regions of electrons are bonding and one is non-bonding, so the overall shape is trigonal pyramidal.

The electron geometry of [tex]PF_{3}[/tex] is trigonal pyramidal.

To learn more about trigonal pyramidal geometry, refer to

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Answer:

32000 pounds

14741.752 kilograms

14741752 grams

16.25 tons

Answer:

Explanation:

The force acting on an object given the mass and acceleration we use the formula

From the question

mass = 142 g = 0.142 kg

acceleration = 9 m/s²

We have

force = 0.142 × 9 = 1.278

We have the final answer as

Hope this helps you

Answer:

1.28

Explanation:

In order for you to get the force you have to multiply the mass & acceleration. The baseball mass is 142 g and the acceleration is 9. So you will calculate 0.142 x 9 and that will give you 1.278. You will then round the 7 to an 8 and then you get the answer 1.28.

Answer:

nitrogen 18

nitrogen has an atomic number of 7

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass of coke = 21.36 g

volume = 20.5 mL

So we have

[tex]density = \frac{21.36}{20.50} \\ = 1.0419512...[/tex]

We have the final answer as

Hope this helps you

Answer:

D. Using a battery

Answer:

I hope this helps

Explanation:

Answer:

5. Divergent boundaries. Divergent boundaries can make underwater ocean trenches.

Answer:

No, because they can each have different number of neurons but be the same element

Answer:

same valency electrons

Explanation:

example g 1 elements

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of gas = 500 mL

density = 0.88 g/mL

We have

mass = 0.88 × 500

We have the final answer as

Hope this helps you