Can you help with this thanks

Answers

Answer 1

Answer:

Steam escapes from a teapot. Is a chemical reaction occurring? No, because liquid to gas would be a physical change, not a chemical change

Explanation:

Related Questions

Hold the slides for observation

Answers

What is this

Explanation

Urgent!
which element do you think has a greater mass? cadmium or zinc?

Answers

Answer:

zinc

Explanation:

Answer:

cadmium has a greater mass.

explanation:

zincs mass: 65.38

cadmiums mass: 112.411

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 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

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

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

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

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

Answers

Gold is the least reactive metal

how many mililiters is 0.55 L

Answers

Answer:

It's 550 milliliters.

Explanation:

I hope this helps.

How many minutes are in 180,0 days?

Answers

Answer:

259,200 minutes

Explanation:

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)

In the above figure, what type of bond is formed?

metallic

ionic

covalent

nonpolar

Answers

The answer is Ionic bond

Answer:

It is an covalent bond.

Explanation: The bond is covalent because all the dots are equaled to each other therefore creating a stable bond. When the bonded atoms have a lower total energy than that of widely separated atoms, a covalent bond forms. The electrons are not moved from one atom to the other in polar covalent bonds, such as that between hydrogen and oxygen atoms, as they are in an ionic bond.

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

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

How are seasons different North & South of the equator

Answers

Answer:

seasons experienced by the northern and southern hemisphere always differ by six months when it is summer in the northern hemisphere, it is winter in the southern hemisphere

Explanation:

Answer:

ohhhhhhh she -he was having a point

What is the mass of 8.03 mole of NH3? (NH3 is 17g/mol)

Answers

Answer:

the mass of 8.03 mole of NH3 is 136.51 g

Explanation:

The computation of the mass is shown below:

As we know that

Mass = number of moles × molar mass

= 8.03 mol × 17 g/mol

= 136.51 g

Hence, the mass of 8.03 mole of NH3 is 136.51 g

We simply multiplied the number of moles with the molar mass so that the mass could come

In the USA 3.5 millions pounds of whole milk are used daily to make milk chocolate how many gallons of milk are used daily

Answers

Answer:

0.4193924945 million

Explanation:

3.5(0.119826427)

1) LIOH + HBr à LIBr + H2O
If you start with 5mol of lithium hydroxide, how many moles of lithium
bromide will be produced?

Answers

deeeeeeezzzzz nutzzzzzzzzz

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

Answers

Answer:

Yes- i balanced it-

Explanation:

Write a summary paragraph explaining limiting and excess reactants and how you can tell which is which.

Will mark as Brainliest if it's correct and if it's not copied and pasted from the internet :)

Answers

In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent, because its quantity limits the amount of products formed. The limiting reactant or limiting reagent is the first reactant to get used up in a chemical reaction. Once the limiting reactant gets used up, the reaction has to stop and cannot continue and there is extra of the other reactants left over. Those are called the excess reactants. The reactant that produces a lesser amount of product is the limiting reagent. The reactant that produces a larger amount of product is the excess reagent. To find the amount of remaining excess reactant, subtract the mass of excess reagent consumed from the total mass of excess reagent given.

Help me pls ,what is this

Answers

less

Explanation:

Because the strawberries are going to become liquid l

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

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 is a mixture

H20
Salad
Table salt

Answers

Answer:

salad is a mixture this is the answer of the question

please mark ne has a brainliest

18. The mass of a metal ring is 116 g. You fill a graduated cylinder with 15 mL of
water and drop the ring into the cylinder. The water level rises to the 26 mL mark.
Which of the following could be the composition of the object?
Metal Composition Density (g/cm)
Silver
10.5
8.
Rhodium
12.41
Gold
19.32
Platinum
21.5
A
C
D.
19. Which of the following is an example of a chemical change?
1 The bread starts to rise in the oven.
II The egg white starts to turn into an opaque solid on the frying pan
III Steam from the shower starts to condense on the bathroom mirror.
A. I and II only
C. II and III only
B. I and III only
D. I, II, and III
20. Which of the following is an example of a physical change?
A. The silver ring is starting to tarnish.
B. The antacid helps calm your stomach.
C. A clump of clay is moulded into a bowl.
D. Milk goes sour when it is left out for days.

Answers

18 B 19 C and 20 A

cuz that's it I hope it helps you

How many grams of carbon are there in 100 g of carbon dioxide? Show your work.

Answers

Answer:

200 I would think..

Explanation:

Feel free to correct me if i'm wrong

Is there any multiple choice??

Please help! I really need help on this!

Answers

Answer:

I wanna say c

Explanation:

It makes the most sense, because non-metals don't produce an electrical current, and therefore aren't conductors.

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:

Explanation:

#hope this help

Name the bond between atoms that share electrons

What is a molecule

Give five examples of molecular elements

Draw a diagram to show the bonding in

Carbon dioxide Methan

hydrogen chlorine

Answers

Answer:

1) Covalent bond, in chemistry, the interatomic linkage that results from the sharing of an electron pair between two atoms. The binding arises from the electrostatic attraction of their nuclei for the same electrons.

2)A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.

3)Hydrogen (H2), oxygen (O2), and chlorine (Cl2) molecules, for example, each contains two atoms. Another form of oxygen, ozone (O3), has three atoms, and sulfur (S8) has eight atoms. All elemental molecules are made of atoms of a single element.

Explanation:

PLEASE MARK ME AS BRAINLIEST

What is the mass of 3.00x10^23 particles of water? Water has a molar mass of 18.0 g/mol.

Answers

Answer:

8.97 g H₂O

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

3.00 × 10²³ particles H₂O

Step 2: Identify Conversions

Avogadro's Number

[Given] Molar Mass of H₂O - 18.0 g/mol

Step 3: Convert

Set up: [tex]\displaystyle 3.00 \cdot 10^{23} \ particles \ H_2O(\frac{1 \ mol \ H_2O}{6.022 \cdot 10^{23} \ particles \ H_2O})(\frac{18.0 \ g \ H_2O}{1 \ mol \ H_2O})[/tex]Multiply/Divide: [tex]\displaystyle 8.96712 \ g \ H_2O[/tex]

Step 4: Check

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

8.96712 g H₂O ≈ 8.97 g H₂O

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