Chemistry High School

need help on 1-10. for chemistry

Need Help On 1-10. For Chemistry

Answers

Answer 1

Answer:

guhhh

Explanation:

Related Questions

The electron has a negative charge.


True
False

Answers

Answer:

true :)

Explanation:

have a great day!!

True
Electrons have a negative charge. The charge in the proton and electron are exactly the same size but opposite.


What is the total amount of heat needed to change 2.25 kg of silver at 0.0°C to 200.0°C? The specific heat of silver is 0.129 J/g·°C (2.25 kg = 2250 g)

Answers

Answer:

Q = 5805 Joules.

Explanation:

Given the following data;

Mass = 2250g

Specific heat capacity of silver = 0.129 J/g·°C

Initial temperature, T1 = 0.0°C

Final temperature, T2 = 200.0°C

To find the quantity of heat needed;

Heat capacity is given by the formula;

[tex] Q = mcdt[/tex]

Where;

Q represents the heat capacity or quantity of heat. m represents the mass of an object. c represents the specific heat capacity of water. dt represents the change in temperature.

dt = T2 - T1

dt = 200 - 0

dt = 200°C

Substituting the values into the equation, we have;

[tex] Q = 225*0.129*200[/tex]

Q = 5805 Joules.

Therefore, the amount of heat needed is 5805 Joules.

The amount of heat needed will be "5805 Joules".

Given values:

Mass, [tex]m = 2250 \ g[/tex]Specific heat capacity, [tex]0.129 \ J/g.^{\circ} C[/tex]Initial temperature, [tex]T_1 = 0.0^{\circ} C[/tex]Final temperature, [tex]T_2 = 200.0^{\circ} C[/tex]then,Change in temperature, [tex]dt = T_2-T_1[/tex]

                                                      [tex]= 200-0[/tex]

                                                      [tex]= 200^{\circ} C[/tex]

As we know the formula,

→ Heat capacity, [tex]Q = mcdt[/tex]

By substituting the values, we get

                                [tex]= 225\times 0.129\times 200[/tex]

                                [tex]= 5805 \ Joule s[/tex]

Thus the above answer is right.

Learn more about heat here:

https://brainly.com/question/20846683

who is princess tianas best friend, if you can get her name right then ill give you brainliest

Answers

Answer:

Oo i think her name is Tiana..... ❤️❤️

Answer:

Charlotte La Bouff

Explanation:

"Lottie" if you will

Please help will give brainless and 10 points each balance the equation

Answers

Answer:

Barium Chloride + Aluminum Sulfate = Barium Sulfate + Aluminum Chloride

Explanation:

Hopefully this helps you!!

Don't be afraid to correct me if i'm wrong! :)

A company uses chlorine to produce titanium chloride from titanium dioxide.
What is the relative formula mass (Mr) of titanium dioxide, TiO2?
Relative atomic masses (Ar): O = 16 Ti = 48 *

Answers

Answer:

80 g/mol

Explanation:

The Relative formular mass is the sum of the relative atomic masses of the elements present in the molecule.

TiO2;

There is one Ti atom and 2 O atom. Their atomic masses is given as;

TiO2 = 48 + 2(16) = 48  + 32 = 80 g/mol

Are substances that taste bitter and feel slippery to the skin

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Answer:

Explanation:

Bases are the substances which have a bitter taste and feel slippery.Sulfuric acid is the most widely made industrial chemical in the world. It is used to make many products, including paper, paint, detergents, and fertilizers. Car batteries contain sulfuric acid. Feel The properties of a base solution include a bitter taste and a slippery feel.

In Period 2, as the elements are considered from left to
right, there is a decrease in
A. Nonmetallic character
b metallic character
C atomic mass
D ionization energy

Answers

Answer:

it will option B ,hope it helps

Which item is most likely to dissolve faster in water. A sugar cubes. B powdered sugar pls helpp

Answers

Answer:

Powdered sugar , it has much more surface area for the state change to occur over

Explanation:

I hope this helps.

Is the following chemical equation balanced?
C₁₀H₂₂ + 31 O₂ ⟶ 20 CO₂ + 22 H₂O

Answers

Answer:

Yes- i balanced it-

Explanation:

Bubbles are released when nitric acid is added to a potassium carbonate solution.
What is the net ion

Answers


Hi can I have a shout out please thank you for your reply thank you for the wonderful reply thank me love

atoms, predict the ratio of metal cationic (+) atom
to nonmetal anionic (-) atom in the compound.
Lithium 1s22s1
Chlorine 1s22s22p6 3s23p5
A. 1:1
B. 1:2
C. 2:1
D. 3:1
D. 3:1

Answers

Answer:

A. 1:1

Explanation:

Lithium 1s2 2s1

Chlorine 1s2 2s2 2p6 3s2 3p5

Lithium is a group 1 element. When it forms a compound, it loses it's one valence (outermost) electron.

Chlorine is a group 7 element. When it forms a compound, it gains one electron to achieve a stable electronic configuration.

Since Li loses one electron and Cl gains one electron. The formular of the compound formed would be;

LiCl

The correct option is;

A. 1:1

Which processes occur when energy is removed from a substance

Answers

Answer:

Note that melting and vaporization are endothermic processes in that they absorb or require energy, while freezing and condensation are exothermic process as they release energy.

What do you think will happen if you put it above the tube that is over the hot soil?

Answers

Answer:

what is "it"

Explanation:

if it's a liquid it will boil

if it's a chemical it could burn or catch on fire

2 Hgo 2 Hg + O2

1. How many grams of mercury (Hg) can be

produced from 3.55 moles of Hgo?

Answers

Answer:

712 moles of Hg are produced

Explanation:

Based on the reaction:

2HgO → 2Hg + O₂

Where 2 moles of HgO reacts producing 2 moles of Hg and 1 mole of O₂

To solve this question we need to find the moles of Hg produced, then, using its molar mass:

Moles Hg:

3.55mol HgO * (2 mol Hg / 2 mol HgO) = 3.55 mol Hg

Grams -Molar mass Hg: 200.59g/mol-:

3.55mol Hg * (200.59g/mol) =

712 moles of Hg are produced

Can Someone Please help me answer this question? I will try to give brainliest.

Answers

Answer:

I believe the answer is y-axis

Explanation:

Sorry if it's not I just wanted to help you in return for helping me!!

Answer:

Y axis I think

Explanation:

Hold the slides for observation

Answers

What is this

Explanation

Please help!! I'll name you brainliest!!

Answers

Answer:

lost is the answer to this question but if I am wrong I am so sorry for that

CAN y’all please help me ASAP with these questions :)

Answers

Answer:

1. Force

2. contact force

3. non-contact force

4. magnetism

5. strength and direction

6. length, direction

7. newtons

Explanation:

You're welcome <3

If a section of DNA has 15% thymine, how much adenine will it have?
1. 15%
2. 30%
3. 60%
4.85%
​

Answers

Answer:

15% adenine

Explanation:

Thymine and adenine are a nitrogenous base pair so they would equal the same.

30% I think, although I am not quite sure

4 Fe + 6 H₂O + 3 O₂ → 4 Fe(OH)₃


Police found 10 grams of Fe(OH)₃ on the knife. Convert grams of rust (Fe(OH)₃) into grams of iron (Fe) to see if the knife contained enough to murder the butler.



345 g Fe



5.22 g Fe



7.34 g Fe



2.95 g Fe

Answers

Someone answer my question please I need help hurry

1.25 x 10^12 molecules H2SO4 to moles

Answers

Answer:

2.08 × 10⁻¹² mol H₂SO₄

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Atomic Structure

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

1.25 × 10¹² molecules H₂SO₄

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Set up:                              [tex]\displaystyle 1.25 \cdot 10^{12} \ molecules \ H_2SO_4(\frac{1 \ mol \ H_2SO_4}{6.022 \cdot 10^{23} \ molecules \ H_2SO_4})[/tex]Multiply/Divide:                                                                                               [tex]\displaystyle 2.07572 \cdot 10^{-12} \ moles \ H_2SO_4[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

2.07572 × 10⁻¹² mol H₂SO₄ ≈ 2.08 × 10⁻¹² mol H₂SO₄

PLEASE HELP ITS PAST DUE IM GIVING BRAINLIEST

Answers

Answer:

it will option A . hope it helps

Answer:

options A

Explanation:

the balloon filled up because of the formation of gas bubbles

Help me pls ,what is this

Answers

less

Explanation:

Because the strawberries are going to become liquid l

What happens when chromium nitrate is added to distilled water

Answers

Answer:

It does not react with water, but reacts with most acids

Explanation:

Answer:

It doesn't react with water, but reacts with most acids

please I don’t get this at all someone help

Answers

i think it’s 7.41 because you count up all the atoms and find out how many are x (the large grey ones) and you do 2/27 x 100 which gives you 7.41 :) (sorry if i counted wrong it’s kinda hard)

______ meters = 177 millimeters

Answers

Answer:

117 millimeters = 0.117 meters

Explanation:

This is using unit conversions. There are 1000 millimeters in 1 meter, so you would divide your starting value, 117 millimeters by 1000 millimeters. The units will cancel because they are being divided by themselves and you are left with 0.117 meters.

how many mililiters is 0.55 L

Answers

Answer:

It's 550 milliliters.

Explanation:

I hope this helps.

What does the MC1R gene code for

Answers

The MC1R gene provides instructions for making a protein called the melanocortin 1 receptor. This receptor plays an important role in normal pigmentation. The receptor is primarily located on the surface of melanocytes, which are specialized cells that produce a pigment called melanin.

Answer:

The MC1R gene provides instructions for making a protein called the melanocortin 1 receptor. This receptor plays an important role in normal pigmentation. The receptor is primarily located on the surface of melanocytes, which are specialized cells that produce a pigment called melanin.

Explanation:

#hope this help

___________ is the least reactive metal.
i. Silver
ii. Iron
iii. Gold
iv. Sodium

Answers

Gold is the least reactive metal


Fill in the blanks
At rest the frog breathes through________​

Answers

Answer:

a process called predominate?

Answer:

the lining of the mouth

Explanation:

its in their predominate form

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