Can someone please explain what to do it’s late at night and I need sleep but I forgot I had this homework please help me with a few questions I’m desperate :(

Answer:

This is called combination reaction

Answer:

No. Light is not a physical thing, so it cannot change physical things like glue.

Explanation:

Light is not effective at all to glue, it doesn't do anything at all.

Explanation:

a.Silver chloride

b.zinc Oxide

c.calcium Bromide

d.strontium difluoride

Answer:

A

Explanation:

The letter A is the correct answer

Answer:

kinetic energy possessed by Ceres = 4.806 × 10^(29) J

Explanation:

We are given;

Estimated mass; m = 3 × 10^(21) kg

Orbital speed; v = 17900 m/s

Formula for kinetic energy is;

K.E = ½mv²

K.E = ½ × 3 × 10^(21) × 17900²

K.E = 4.806 × 10^(29) J

Thus;

kinetic energy possessed by Ceres = 4.806 × 10^(29) J

Hello there!

The solute is salt, and the solvent is water. So the answer is #1.

PS. Can I have Brainliest?

Earth climate has stayed same thougout the past

Answer:

A. 6 moles

Explanation:

This question contains a chemical reaction between aluminum (Al) and Copper(II)Chloride to give copper and aluminum chloride. The unbalanced chemical equation is as follows:

Al (s) + 3CuCl2 (aq) → Cu (s) + 2AlCl3

To balance the equation, we use coefficients in front of Al and Cu to ensure the amount of both are uniform on both sides of the equation. The balanced equation is as follows;

2Al (s) + 3CuCl2 (aq) → 3Cu (s) + 2AlCl3

From the balanced equation, 2 moles of Al reacts with 3 moles of CuCl2

Hence, 4 moles of Al will react with (4 × 3) ÷ 2

= 12 ÷ 2

= 6 moles of CuCl2

Answer:

C7H6O2

Explanation:

Let;

68.8% of Carbon represents 68.8g

4.95% of Hydrogen represents 4.95g

26.25% of Oxygen represent 26.25g

Next, we convert each gram value to mole value by dividing by their respective molar mass {C = 12, H = 1, O = 16}

C = 68.8/12 = 5.73 mol

H = 4.95/1 = 4.95 mol

O = 26.25/16 = 1.64 mol

Next, we divide each mole value by the smallest (1.64mol)

C = 5.73 ÷ 1.64 = 3.49

H = 4.95 ÷ 1.64 = 3.02

O = 1.64 ÷ 1.64 = 1

Next, we multiply each ratio by 2 to obtain our simplest whole number ratio (empirical formula)

C = 3.5 × 2 = 7

H = 3.02 × 2 = 6

O = 1 × 2 = 2

Hence, the ratio of C, H and O is 7:6:2 and the empirical formula of benzoic acid is C7H6O2

Answer:

11

Explanation:

Sodium is a chemical element with the symbol Na and atomic number 11.

Answer:

22.99g/mol (in this case 23g/mol)

Answer:

Hi ,

Answer :

Sulfuric acid

Answer: The answer is YES. There would still be recycling of carbon even if it wasn't extracted as fossil fuels for energy use.

Explanation:

Carbon is an element in the periodic table with the atomic number of 12. It has 4 electrons on its outermost shell in the electronic configuration. These are valence electrons which are used to form bonds in a wide range of both organic and inorganic compounds, giving rise to simply molecules like carbondioxide.

CARBON CYCLE is a natural process through which carbon and it's compounds are kept fairly constant through recycling. They are found in fossils fuels such as oil, coal, and natural gas. When these fossil fuels are burnt and used as energy, carbon is released in form of carbondioxide. This is just one of the ways carbon is returned to the atmosphere. Other ways include:

--> respiration of plants and animals

--> decomposition of organic substances

--> action of dilute acids and heat on trioxocarbonates (V) and hydrogen trioxocarbonates (IV).

Carbon is then removed from the atmosphere through:

--> plants in photosynthesis

--> rain water as weak trioxocarbonate (IV) acid.

Therefore, there would still be recycling of carbon even if it wasn't extracted as fossil fuels for energy use because the burning of fossil fuels is not the only way carbon is returned to the atmosphere during carbon cycle.

Explanation:

pressure is Force/area

30000/0.75

Answer:

Is there a way you can give a answer made for a 5th grade

Explanation:

Answer:

Acid is a kind of chemical compound that when dissolved in water gives a solution with H+ ion activity more than purified water. A base is an aqueous substance that donates electrons, accept protons or release hydroxide (OH-) ions. An acid is a proton donor. While a base is a proton acceptor.

Explanation:

Hey mate, here's your answer...

Answer:

The correct answer is number 2. Elliptical, Spiral, Irregular.

Explanation:

Unfortunately, you did not attach the passage. Without the passage, we do not know what its content is.

So we are going to answer this question with our own knowledge.

The types of galaxies by their ability to form new stars, from most to least activity are "Elliptical, Spiral, Irregular."

That is the way astronomers classify galaxies in scientific terms. These scientists consider that the smallest galaxies or dwarf galaxies have approximately 100 million stars. On the other hand, giant galaxies have billions or trillions of stars. That immense is our universe.

Scientists still studying the universe and the galaxies to understand the way galaxies are formed.

Answer:

Q = 306 kJ

Explanation:

Given that,

Mass, m = 60 kg

Specific heat, c = 1020 J/kg°C

The temperature changes from 20°C to 25°C.

Let Q be the change in thermal energy. The formula for the heat released is given by :

[tex]Q=mc\Delta T[/tex]

Put all the values,

[tex]Q=60\times 1020\times (25-20)\\\\Q=306000\ J\\\\or\\\\Q=306\ kJ[/tex]

So, 306 kJ is the change in thermal energy.

Answer:

0.000236

Explanation:

Move the decimal point 4 times to the left of its original position

Answer:

B: There are only so many ways matter can arrange itself within that infinite universe.

The idea of a parallel universe was supported by Brian Greene on the basis that there are only so many ways matter can arrange itself within that infinite universe.

Matter is anything that has mass and occupy space. The universe as we know it is filled with matter. The theory of multiple universe holds that there could be another universe apart from this one that we know.

This theory was supported by Brian Greene on the basis that there are only so many ways matter can arrange itself within that infinite universe.

Learn more about universe: https://brainly.com/question/9904853

Answer:

There are 15 protons in phosphorous.

~Hoped this helped~

~Brainiliest?~

Water cannot dissolve all substances that are made from ionic bonds probably because some ionic bonds are too strong for the attractions of water molecules to pull them apart.

However, some ionic bonds formed from ions of elements are unable to be dissolved by water and this is probably attributed to the fact that those bonds are too strong to be pulled apart by water molecules.

Learn more about at ionic compounds at: https://brainly.com/question/9167977

Answer:

ΔHr = -566kJ/mol

Explanation:

Based on Hess's law, the ΔH of a reaction is the sum of the ΔH's of products times its coefficient subtracting the ΔH of reactants. For the reaction:

2CO(g) + O2(g) → 2CO2(g)

ΔH is:

ΔHr = 2*ΔH CO2 - (2ΔH CO + ΔH O2)

As ΔH CO2 = -393.5kJ/mol; ΔH CO = -110.5kJ/mol and ΔH O2 = 0kJ/mol

ΔHr =  2*-393.5kJ/mol - (2*-110.5kJ/mol)

Answer: Yes F is also correct.

Explanation: