Pleas help with 2 and 4 for brainliest

Answer:

Farther, lesser

Explanation:

The farther the two objects are from each other, the lesser the force of gravity between them.

The force of gravitational attraction between two bodies is inversely proportional to the distance between them.

This premised on the Newton's law of universal gravitation which states that "the gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distances between them".

So, the farther the distance, the lesser the gravitational attraction and vice versa.

Answer:

Fluorine is most likely to bond with lithium One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy.

Answer:

Fluorine is most likely to bond with lithium One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy.

Answer:

This chemical equation represents a decomposition reaction. This identification is based on the fact that the single reactant chemical compound breaks down into two different chemical substances that are different from the initial chemical substance.

Explanation:

it was the sample response lol

A reactant is broken down into two or more products in the decomposition reaction. The given reaction is a decomposition reaction.

Decomposition reaction:

In this type of chemical reaction, a reactant is broken down into two or more products.

For example- Ammonium nitrate is broken down into nitrous oxide and water molecules.

[tex]\bold {NH_4NO_3 \rightarrow N_2O + 2H_2O}[/tex]

Therefore, the given reaction is a decomposition reaction.

To know more about Decomposition reaction:

https://brainly.com/question/24936069

Answer:

T2 =21.52°C

Explanation:

Given data:

Specific heat capacity of sample = 1.1 J/g.°C

Mass of sample = 385 g

Initial temperature = 19.5°C

Heat absorbed = 885 J

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = Final temperature - initial temperature

885J = 385 g× 1.1 J/g.°C×(T2 - 19.5°C )

885 J = 423.5 J/°C× (T2 - 19.5°C )

885 J / 423.5 J/°C = (T2 - 19.5°C )

2.02°C = (T2 - 19.5°C )

T2 = 2.02°C + 19.5°C

T2 =21.52°C

Answer:

the answer I's the first one

Answer:

ribosome is the cell

Explanation:

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Answer:

A. Bromine (Br)

Explanation:

Answer:

Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

Explanation:

Answer:

Radiant energy (from the sun)

Explanation:

Answer:

The cytoplasm

Explanation:

Cytoplasm is the gelatinous liquid that fills the inside of a cell. It is composed of water, salts, and various organic molecules. Some intracellular organelles, such the nucleus and mitochondria, are enclosed by membranes that separate them from the cytoplasm.

Pls mark as brainliest

hope this helps:)

Answer:

C) Potassium, K, and calcium, Ca

Explanation:

Given pair of elements:

Ni and Cu

Potassium and Ca

Nitrogen and oxygen

Solution:

We know that number of protons and number of electrons are always equal and number of electron or number of proton is called atomic number.

Number of protons given elements:

Ni number of protons = 28

Copper number of protons  = 29

Combine number of protons = 57

K number of protons  = 19

Ca number of protons = 20

Combine number of protons = 39

Ni number of protons  = 7

O number of protons  = 8

Combine number of protons = 15

Thus,  option C is correct.

Answer:where are the statements

Explanation:

Answer:

molecular formula of the compound is C₄H₈O₄

Explanation:

First the empirical formula of the compound is determined:

Divide the percentage masses by the molar mass of each element to determine the mole ratio;

Carbon, C: 40/12 = 3.33

Hydrogen, H: 6.6/1 = 6.6

Oxygen, O: 53.4 / 16 = 3.3

dividing through with the smallest ratio to obtain the simplest whole number mole ratios

C = 3.3/3.3 = 1

H = 6.6/3.3 = 2

O = 3.3/3.3 = 1

Therefore, the empirical formula is CHO

molecular formula/mass = n (empirical formula/mass)

120 g/mol = n( 12 + 1 * 2 + 16)

30n = 120

n = 4 therefore, the molecular formula = 4(CH₂O)

molecular formula of the compound is C₄H₈O₄

Moles of Lithium phosphate : 0.495

Given

6 Li + Zn₃(PO₄)₂ ------- > 2 Li₃PO₄ + 3 Zn

Required

Moles of Lithium phosphate

Solution

moles of Zinc(Ar=65,38 g/mol) :

= mass : Ar

= 48.6 : 65.38

= 0.743

From equation, mol ratio of Zn :  Li₃PO₄ = 3 : 2, so mol  Li₃PO₄ :

= 2/3 x mol Zn

= 2/3 x 0.743

= 0.495

Answer:

28g/mol

2 moles of nitrogen are present

Explanation:

The molar mass is defined as the mass of a chemical when 1 mole of this substance is present and is used to convert mass of the substance to moles or vice versa. Is widely used in stoichiometry problems.

1 atom of nitrogen has a molar mass of 14g/mol. N₂(g) -The molecule that contains 2 atoms of nitrogen- has a molar mass of 28g. That is 28g/mol.

56g of N₂ are:

56g * (1mol / 28g) =

Answer:

2. Frequency

Explanation:

Edge 2021

Answer:

A microbiome is the community of micro-organisms living together in a particular habitat.

Explanation:

Answer:

5.01 L

Explanation:

my guy i just took the test, it was this one

Answer:airr

Explanation:

Answer:

...

Explanation:

% yield = 80.719

Given

22.0 g of Mgl₂

25.0 g of Mg

25.0 g of l₂

Required

The percent yield

Solution

Reaction

Mg + I₂⇒ MgI₂

mol Mg = 25 g : 24.305 g/mol = 1.029

mol I₂ = 25 g : 253.809 g/mol = 0.098

Limiting reactant = I₂

Excess reactant = Mg

mol MgI₂ based on I₂, so mol MgI₂ = 0.098

Mass MgI₂ (theoretical):

= mol x MW

= 0.098 x 278.114

= 27.255 g

% yield = (actual/theoretical) x 100%

% yield = (22 / 27.255) x 100%

% yield = 80.719

Answer:

High

Explanation:

The answer to this question has been hinted in the question;

molecules in warm water move faster than molecules in cold water

This means that the relationship between temperature and movement of atoms is as follows;

At higher temperatures, atoms possess more energy and due to this they are able to move at high velocity (really fast).

On the other hand, lower temperatures means that the atoms possess less energy and due to this they move with a lower velocity.

Answer:

or example, most samples of the elements hydrogen, oxygen, and nitrogen are composed of molecules that contain two atoms each (called diatomic molecules) and thus have the molecular formulas H2, O2, and N2, respectively. ... A molecule of sulfur is composed of eight sulfur atoms and is therefore written as S8.

The maximum temperature : a. 745 K

Given

Gas at 25°C(298 K) and at a pressure of 0.800 atm

Final pressure = 2 atm

Required

Final temperature

Solution

Gay Lussac's Law  

When the volume is not changed, the gas pressure in the vessel is proportional to its absolute temperature  

[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]

Input the value :

T₂=(P₂T₁)/P₁

T₂=(2 atm x 298 K)/0.8 atm

T₂ = 745 K = 472 °C

Answer:

The third one from the left–the graduated cylinder.

Explanation:

The laboratory apparatus that gives an "accurate" or "precise" measurement of a liquid's volume is the graduated cylinder. All you have to do is to pour the liquid into the cylinder and read its measurement using the calibrated scale.

The graduated cylinder comes in different sizes, which means the scale divisions will depend on its size. When reading the measurement, it is important to take note to read at the bottom of the meniscus because it gives the most accurate volume.

Answer:

graduated cylinder

Explanation:

Answer:

True......................had to do this because we need atleast 20 letters