someone please ASAP
the options are
1. BF.
2.B4
3.B2F2
3.BF3

Answer:

false

Explanation:

because  i know it

Answer:

i think the answer is letter C. From 35°c to 45°c

Explanation:

sorry if it is wrong

Answer: 3.94 x 10^23 molecules

Explanation: hope this helps!

Answer:

eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeiiiiiieeeeeemmmmmmmmiemeeeeeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiimiiiimmmmmmmmmmmmmmmmmmmiimmiimiiiiiiiimiiiiiimmii

Explanation:

Answer:

0.327214 mol

Explanation:

45.5/278.106=0.163607

Then, 0.163607x2= 0.327214

Answer:

LD50 is the amount of a material, given all at once, which causes the death of 50% ... LD100 Lethal dose for 100% of the animal test population ... Researchers can do the test with any animal species but they use rats or mice ... quoted as parts per million (ppm) or milligrams per cubic metre

Explanation: hope this helps :)

Answer:

A good hydrogen ion acceptor

Answer:

any reaction will be in dynamic equilibrium if it's reversible and the rates of the forward and reverse reactions are equal.

Explanation:

say that you prepare a solution that is saturated with an aqueous solution of NaCl

Answer:

605.0024

The molar mass and molecular weight of Pb(ClO4)4 is 605.0024.

Explanation:

Answer: Mantle

Explanation:

there are 3 layers of the earth- core, mantle and crust. The layer found directly above the earth's core is the mantle.

Answer:

The answer depends on what you are taking about: the outer core or the inner core?

Answer: Mantle

Explanation:

If you find a picture of the Earth's layers, you can see that the inner core is the bottommost layer.  However, if you combine the Inner Core and Outer Core, that could be determined as the Earth's core.  

I would chose the Mantle because if the two cores are combined, the layer directly above them is the Mantle.

Answer:

Synthesis :)

Explanation:

Answer:

Explanation:

1.5 moles to molecules

1 mole = 6.02 x 10²³ molecules

1.5 moles = 6.02 x 1.5 x 10²³ molecules

= 9.03 x 10²³ molecules

2 )

Convert 1.204x10²⁴ molecules to moles

6.02 x 10²³ molecules  = 1 mole

1.204x10²⁴ molecules = 1.204x10²⁴ / 6.02 x 10²³ moles

= 2 moles

3 ) Convert 1.5x10^20 molecules to moles

6.02 x 10²³ molecules  = 1 mole

1.5x10²⁰ molecules = 1.5x10²⁰ / 6.02 x 10²³ moles

= .25 x 10⁻³ moles

= 2.5 x 10⁻⁴ moles .

4 )

Convert 0.35 moles to molecules

1 moles = 6.02 x 10²³ molecules

.35 mole = 6.02 x .35 x 10²³ molecules

= 2.1 x 10²³ molecules.

5 )

Convert 15 moles H₂O to atoms

1 moles = 6.02 x 10²³ molecules

15 moles = 15 x 6.02 x 10²³ molecules

= 90.3 x 10²³ molecules of water

1 molecule of water has 3 atoms in total

90.3 x 10²³ molecules of water  = 90.3 x 3 x 10²³ atoms

= 270.9 x 10²³ atoms .

6 )

0.75 moles CaSO₄ to atoms

1 moles = 6.02 x 10²³ molecules

.75 moles = .75 x 6.02 x 10²³ molecules of CaSO₄

= 4.515 x 10²³ molecules of CaSO₄

1 molecule of CaSO₄ = 6 atoms

4.515 x 10²³ molecules of CaSO₄ = 6 x 4.515 x 10²³ atoms

= 27.09 x 10²³ atoms .

Answer:

primary

Explanation:

Answer:

CCUCAAUGUCAAUCAU or you could try CCTCAACGTCAATCAT i could be wrong so sorry im not the best

Answer:

Replicated DNA: CCT-CAA-TGT-CAA-TCA-T

Transcription sequence (mRNA): CCU-CAA-UGU-CAA-UCA-U

Explanation:

Answer:

88%

Explanation:

percent yield is the actual yield divided by the theoretical (predicted) yield, then multiplied by 100 to get a percentage.

110/125 = 0.88

0.88 x 100 = 88%

Answer:

553.5 cm3

Reason:

1 mL = 1 cm3

Answer:

The pressure inside the bottle is 92.678 atm.

Explanation:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

Replacing:

P* 0.500 L= 2.07 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] * 273 K

Solving:

[tex]P=\frac{2.07 moles* 0.082 \frac{atm*L}{mol*K} * 273 K}{0.500 L}[/tex]

P= 92.678 atm

The pressure inside the bottle is 92.678 atm.

Answer:

Environment Secretary can refer to:

Cabinet Secretary for Rural Affairs and the Environment, Scotland

Secretary for the Environment, Transport and Works, Hong Kong

Secretary of State for Environment, Food and Rural Affairs, United Kingdom

Secretary of the Environment (Mexico)

Answer:

I don't know I'm sorry I will tell you another

Answer:

1656.12grams

Explanation:

To calculate the mass of a substance in a particle, we need to calculate the number of moles (n).

n = nA × 6.02 × 10^23

nA = 8.98 x 10^24 particles

number of moles = 8.98 x 10^24 ÷ 6.02 × 10^23

n = 8.98/6.02 × 10^ (24 - 23)

n = 1.492 × 10^1

n = 14.92moles of CaCl2

Molar Mass of CaCl2 where Ca = 40g/mol, Cl = 35.5g/mol

CaCl2 = 40 + 35.5(2)

= 40 + 71

= 111g/mol

Using mole = mass/molar mass

mass = molar mass × mole

mass = 111 × 14.92

mass = 1656.12grams.

Answer:

1. thermometer

2. thermal energy

3. specific heat

4. temperature

5. Celsius

6. heat

7. mass

Answer:d

Explanation:

Answer:

A mixture has different properties throughout; a pure substance has the same properties throughout.

Explanation:

Answer:

1 year- 1 mole

time in general- amount of matter

1 second- 1 atom/ particle

Answer:

1 Year => 1 Mole

Time in General => Amount of Matter

1 Second => 1 Atom/Particle

Explanation:

These pairs make the most sense.

Hope it helps!!!

Explanation:

b is correct. 30.6 g H2O is produced.

Answer:

noble gases from what i learnt

Answer:

7.01 is the answer of the [H+] of a solution with a pH of 4.78