Chemistry High School

Can you Help me please...

Answers

Answer 1

Answer:

590J or 590.4J :)

Explanation:

2.46 x 6 (35-29= 6) x 40 = 590.4J

Nearest whole number : 590J

Related Questions

How are plate tectonics and the rock cycle connected? Select the best answer from the choices below.

a
The rock cycle keeps the plates from moving too far apart
b
Igneous rocks that form from magma are a major part of the rock cycle
c
The heat from the mantle that fuels plate tectonics also drives the rock cycle
d
Plate tectonics causes sedimentary rocks to turn into metamorphic rocks

Answers

the correct answer is the option c

Can you help me please

Answers

Answer:

11.5 or 11.52, depending on however many decimal places you round it to

Explanation:

the equation for mass ( using the specific heat capacity equation) is energy transferred divided by temperature change x the specific heat capacity.

so, we do 725 ÷ 32° (the temp change) x 2.03 = 11.52 or 11.5, depending on how many decimal places you round to

i would round to 2 decimal places, so the answer would be 11.52kg.

mass is measured in kg :) hope this helped.

the answer has to be 3 to 5 sentences for me to get full credit. ❤❤

Answers

The periodic table is an important but rather dry scientific tool. It lists all the chemical elements, ordered by their atomic numbers. Elements with similar behavior are grouped in the same column (called a group), with metals generally on the left and non-metals (gases) on the right. Rows are called “periods” - hence, periodic table.

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why is pluto classified as a dwarf planet?

Answers

Answer:

pluto is considered a dwarf planet because it did not meet the three criteria the IAU uses to define a full sized planet

Explanation:

Which flows through the other?

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Is there a picture, or.

Metallic bonding is sometimes referred to as a "sea of electrons." I sometimes picture is as cheerios (nuclei) floating around in milk (valence electrons). And while metallic bonding has the name "bond" it can be very different from Ionic and Covalent Bonds.
In complete sentences describe how Metallic bonds are alike, and how they are different from the other bond types we have studied.

Answers

They start from that area

ng.
3. Connect to Technology How do probes,
including landers and rovers, improve our
ability to make observations of other planets?
s

Answers

They make finding things easier so we plug abs don’t need to go on the other planets and can just send the -robots

A sample of unknown gas has a temperature of 378k. When the temperature is increased to 546k,the volume also increases to 1047 ml. What was the original volume ?

Answers

Given :

A sample of unknown gas has a temperature of 378 K.

[tex]T_i = 378 \ K , \ T_f = 546 \ K[/tex]

When the temperature is increased to 546 K, the volume also increases to 1047 ml.

[tex]V_f - V_i = 1047 \ ml[/tex]

Solution :

We know, temperature is directly proportional to volume.

[tex]\dfrac{T_i}{T_f}=\dfrac{V_i}{V_f}\\\\\dfrac{T_i}{T_f} = \dfrac{V_i}{1047 + V_i}\\\\\dfrac{V_i}{1047+V_i}=\dfrac{378}{546}\\\\546V_i = 378V_i + 378\times 1047\\\\168V_i = 3,95,766\\\\V_i = 2,355.75\ ml[/tex]

Therefore, the original volume is 2.355.75 ml.

___ SeCl6 + ___ O2 --> ___ SeO2 + ___ Cl2

What is the balanced equation for these reactions?

I give Brainliest! Please no links

Answers

Answer:

SeCl₆ + O₂ → SeO₂ + 3Cl₂

Explanation:

Unbalanced:

SeCl₆ + O₂ → SeO₂ + Cl₂

Count the atoms.

On the left side, we have 1 Se atom, 6 Cl atoms, and 2 O atoms.

On the right side, we have 1 Se atom, 2 O atoms, and 2 Cl atoms.

So everything is balanced except for Cl. To balance, we put a 3 coefficient in front of Cl₂.

SeCl₆ + O₂ → SeO₂ + 3Cl₂

The behavior of an organism is influenced A. only by the organism's life experiences. B. only by the organism's evolutionary history. C. by both the organism's evolutionary history and its life experiences. D. by neither the organism's evolutionary history nor its life experiences.

Answers

C because it would be influenced by both

What is the mass of 4.57 x 1021 molecules of ammonia (NH3)?

Answers

Answer:

4665.97

Explanation:

Can yall help me with this one, thanks!

Answers

Answer:

Element atom molar mass Total % composition

Na 1 23 40 57.5 %

O 1 16 40 40%

H 1 1 40 2.5 %

The given compound is NaOH.

Na : number of atom= 1

Molar mass= 23 g/mol

Total mass of NaOH = 40 g/mol

% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{23}{40}\times 100=57.5\%[/tex]

O : number of atom= 1

Molar mass= 16 g/mol

Total mass of NaOH = 40 g/mol

% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{16}{40}\times 100=40\%[/tex]

H : number of atom= 1

Molar mass= 1 g/mol

Total mass of NaOH = 40 g/mol

% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{1}{40}\times 100=2.5\%[/tex]

An atom of a certain element has 19 protons, 19 electrons, and a mass number of 39. This element is very reactive. How many neutrons are in this atom?

Answers

Answer:

There would be [tex]20[/tex] neutrons in that atom.

Explanation:

The mass number of an atom is the sum of:

the number of neutrons in this atom, andthe number of protons in this atom.

Electrons do not contribute to the mass number of an atom.

From the question:

Mass number of this atom: [tex]39[/tex].Number of protons in this atom: [tex]19[/tex].

[tex](\text{Mass Number}) = (\text{Number of protons}) + (\text{Number of neutrons})[/tex].

In this atom:

[tex]39 = 19 + (\text{Number of neutrons})[/tex].

Hence, the number of neutrons would be [tex]39 - 19 = 20[/tex].

What happens with electrons when atoms form covalent bonds?

Answers

Answer:

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

Explanation:

does the mercury not have fixed shape and volume at 20 degree

Answers

Answer:

Mercury doesn't have a fixed shape

26. What are two water cycle processes not represented by arrows in this cross section?
1) transpiration and condensation 3) precipitation and freezing
2) evaporation and melting
4) runoff and infiltration

Answers

Answer:

Explanation:

Which of the following are things that may change during an experiment?

Answers

Answer:

The things that are changing in an experiment are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types.

The importance of improving soil usage FULL SENTENCES 50 POINTS HELP PLEASE

Answers

Improving soil usage is important because healthy soil helps turn dead matter and minerals into plant nutrients , Improving soil usage helps as a protection against droughts
brainliest plz

MULTIPLE CHOICE QUESTION
The difference between the smooth and rough ER is
that are attached to the outside of
ER.
the
the
ribosomes, smooth
DNA, rough
DNA, smooth

Answers

Answer:

???????

Explanation:

Answer: The difference between the smooth and rough ER is that ribosomes are attached to the outside of the rough ER.

Hope this helped! :)

Calculate the molarity 14.1 moles of FeCl3 dissolved in 2350 ml of solution

Answers

Molarity = moles of solute/volume (in liters) of solution.

We have 14.1 moles of FeCl3, which is the solute, and the volume of our solution is 2.350 liters. So, the molarity of the solution would be (14.1 moles FeCl3)/(2.350 L solution) = 6 moles/L FeCl3 or 6 M FeCl3.

What is the H 2 : H2O molar ratio?

Answers

Answer:

The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are being made.

Explanation:

How many atoms of hydrogen are there in one molecule of water. if the chemical formula is H202 ?

a. 0

b. 1

c. 2

d. 3

Answers

The answer is , there are 2 atoms of hydrogen in one molecule of water

number of elments in hcooh

Answers

3 elements are present in HCOOH - hydrogen, oxygen, and carbon.

Hyperthermus butylicus is an aquatic prokaryote found near the coast of Portugal. It is found sand along the gas vents that release steam and carbon dioxide. In what domain would scientists classify this prokaryote?
A Eukarya
B Bacteria
C Archaea
D Fungi

Answers

they would classify it as c.

An Archaea

have a great day!

When performing a neutralization reaction, how should students test the solution to be sure which is the acid and which is the base?

Answers

Explanation:

La reacción entre un ácido y una base se llama neutralización. Cuando en la reacción participan un ácido fuerte y una base fuerte se obtiene una sal y agua. Si una de las especies es de naturaleza débil y la neutralización se produce en disolución acuosa también se obtiene su respectiva especie conjugada y agua.

How many moles of HCl are present in 1.30 L of a 0.50 M solution
0.50 moles
3.00 moles
O 0.65 moles
0 1.50 moles

Answers

Answer:

0.65moles of HCl was produced

A single atom is in a balanced electrical state.

It has the same number of which pair of particle types?

electrons and neutrons

protons and electrons

neutrons and isotopes

protons and neutrons

Answers

I believe the answer is: Protons and Neutrons
Protons weigh 1 amu while neutrons also weigh 1 amu. I’m not sure if they are talking about how many there is.

What type of pressure can you expect to find in the air when you have a sunny day with no clouds?

Answers

Answer:

sunny i guess but if u don't feel sunny the warm

Answer:

A high pressure system is a whirling mass of cool, dry air that generally brings fair weather and light winds. When viewed from above, winds spiral out of a high-pressure center in a clockwise rotation in the Northern Hemisphere. These bring sunny skies. A high pressure system is represented as a big, blue H.

Explanation:

the answer

neeed morreeeee help w science

Answers

Answer:

Explanation:

Answer:

its actually 83° rounding it so choose that

How many moles are there in 2.35x10^23 molecules of water

Answers

Answer:

0.39017 moles

Explanation:

a mole is 6.023×10^23

(2.35×10^23)÷(6.023×10^23)=0.39017

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