All categories

3 years ago

6th grade science help me pleaseee

Chemistry

2 answers:

11111nata11111 [884]3 years ago

6 0

Answer:

anime sussy baka ;)

Explanation:

ddeijccdkoekjnekpslkm

Lisa [10]3 years ago

5 0

Answer:

I think the answer is C because when something is heterozygous Dominant it means it was made of two different strands that will cover up a recesive gene

Explanation:

You might be interested in

In the laboratory you are asked to make a 0.175 m barium iodide solution using 13.9 grams of barium iodide. How much water shoul

BARSIC [14]

Answer: The mass of water that should be added in 203.07 grams

Explanation:

To calculate the molality of solution, we use the equation:

$\text{Molality}=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}$

Where,

m = molality of barium iodide solution = 0.175 m

$m_{solute}$ = Given mass of solute (barium iodide) = 13.9 g

$M_{solute}$ = Molar mass of solute (barium iodide) = 391.14 g/mol

$W_{solvent}$ = Mass of solvent (water) = ? g

Putting values in above equation, we get:

$0.175=\frac{13.9\times 1000}{391.14\times W_{solvent}}\\\\W_{solvent}=\frac{13.9\times 1000}{391.14\times 0.175}=203.07g$

Hence, the mass of water that should be added in 203.07 grams

4 0

3 years ago

A closed system initially containing 1×10^-3 hydrogen 2×10^-3M iodine at 448 degree Celsius and is allowed to reach equilibrium.

GaryK [48]

Answer:

Kc = 50.5

Explanation:

We determine the reaction:

H₂ + I₂ ⇄ 2HI

Initially we have 0.001 molesof H₂

and 0.002 moles of I₂

If we have produced 0.00187 moles of HI in the equilibrium we have to know, how many moles of I₂ and H₂, have reacted.

H₂ + I₂ ⇄ 2HI

In: 0.001 0.002 -

R: x x 2x

Eq: 0.001-x 0.002-x 0.00187

x = 0.00187/2 = 9.35×10⁻⁴ moles that have reacted

So in the equilibrium we have:

0.001 - 9.35×10⁻⁴ = 6.5×10⁻⁵ moles of H₂

0.002 - 9.35×10⁻⁴ = 1.065×10⁻³ moles of I₂

Expression for Kc is = (HI)² / (H₂) . (I₂)

0.00187 ² / 6.5×10⁻⁵ . 1.065×10⁻³ = 50.5

5 0

3 years ago

What organic product would you expect from the reaction of ethylmagnesium bromide (CH3CH2MgBr) with H2O.

tatyana61 [14]

Answer:

It would produce ethane (CH₃CH₃)

Explanation:

Ethylmagnesium bromide (CH₃CH₂MgBr) is a Grignard's reagent.

It is a highly reactive substance, and as any alkylmagnesium bromide

(R-CH₂MgBr) it reacts with water to produce an alkane (R-CH₃). R stands for any carbon structure bonded to that functional group.

5 0

3 years ago

Arrange the following H atom electron transitions in order of increasing frequency of the photon absorbed or emitted:

Setler [38]

The order of frequency is d < a < c < b

$E_{n} = 13.6 * z^{2} / n^{2}$ eV

where z = atomic mass number

n = energy level

For hydrogen z = 1

Therefore, Energy for n = 1

$E_{n} = 13.6 * 1^{2} / 1^{2}$ eV

= -13.6 eV

for n = 2

$E_{n} = 13.6 * 1^{2} / 2^{2}$ eV

= -3.40 eV

for n = 3

$E_{n} = 13.6 * 1^{2} / 3^{2}$ eV

= -1.51 eV

for n = 4

$E_{n} = 13.6 * 1^{2} / 4^{2}$ eV

= -0.85 eV

for n = 5

$E_{n} = 13.6 * 1^{2} / 5^{2}$ eV

= -0.544 eV

n = 2 to n = 4 (absorption)

ΔE = E4 - E2 = -0.85 - (-3.40) = 2.55 eV

n = 2 to n = 1 (emission)

ΔE = E1 - E2 = -13.6 - (-3.40) = -10.2eV

The negative sign indicates that emission will take place.

n = 2 to n = 5 (absorption)

ΔE = E5 - E2 = -0.544 - (-3.40) = 2.856 eV

n = 4 to n = 3 (emission)

ΔE = E3 - E4 = -1.51 - (-0.85) = -0.66 eV

We know that

E = h * υ

Therefore, Energy is proportional to frequency.

So increasing the order of energy is

E4 < E1 < E3 < E2

order of frequency is

d < a < c < b

For more information click on the link below:

brainly.com/question/17058029

# SPJ4

8 0

1 year ago

Why is coal not classified as a mineral?

Salsk061 [2.6K]

Answer:

Coal is not classified as a mineral because it comes from organic materials.

Explanation:

Minerals are naturally-formed substances that have a specific chemical makeup. They are created when elements combine. Minerals are non-organic and most have a set crystalline structure. Examples of minerals include diamond, azurite, beryl, and pyrite.

6 0

3 years ago

Read 2 more answers