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barxatty [35]
3 years ago
14

The three dimensional structure of dna was determined by two scientist named

Chemistry
1 answer:
Whitepunk [10]3 years ago
3 0
James D Watson and Francis Crick
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12.5 g of water are warmed from 12C to 72C. How much energy in J were absorbed? (specific heat of water=4.18 J/gC)
Marta_Voda [28]

Answer

Energy = 3135 J

Explanation

<em>Given:</em>

Mass of water = 12.5 g

Final temperature = 72 C

Initial temperature = 12 C

Specific heat of water = 4.18 J/g C

<em>Required:</em> Energy

Solution

Q = m x Cp x ΔT

where Q is heat absorbed or released

m is the mass

Cp is the specific heat capacity

ΔT = final temperature - initial temperature

Q = 12.5 g x 4.18 J/gC x (72 - 12 C)

Q = 3135 J

7 0
1 year ago
Need Help On Both Questions !!<br><br> Please help will mark Brainly
posledela

1 is a brain 2 is also a brain it can be other stuff tho but you're welcome

7 0
3 years ago
how do i Calculate the grams of silver chloride produced from 18.5 ml of 4.5M magnesium chloride with 99.2 ml of 1.75 M silver n
sertanlavr [38]

Answer:

4.21 g of AgCl

3.06 g of BaCl₂ will be needed to complete the reaction

Explanation:

The first step is to determine the reaction.

Reactants: BaCl₂ and AgNO₃

The products will be the silver chloride (AgCl) and the Ba(NO₃)₂

The reaction is: BaCl₂(aq) + 2AgNO₃(aq) → 2AgCl(s) ↓ + Ba(NO₃)₂ (aq)

We determine the silver nitrate moles: 5 g . 1mol / 169.87 g = 0.0294 moles. Now, according to stoichiometry, we know that ratio is 2:2-

2 moles of nitrate can produce 2 moles of chloride, so the 0.0294 moles of silver nitrate, will produce the same amount of chloride.

We convert the moles to mass → 143.32 g / mol . 0.0294 mol = 4.21 g of AgCl.

Now, we consider the BaCl₂.

2 moles of nitrate can react to 1 mol of barium chloride

Then, 0.0294 moles of silver nitrate will react to (0.0294 . 1) /2 = 0.0147 moles. We convert the moles to mass:

0.0147 mol . 208.23 g /1mol = 3.06 g of BaCl

Explanation:

5 0
4 years ago
It takes Mrs. Stephan 1/4 of an hour to run 1 1/2 miles. What is her unit rate in miles per hour​
PtichkaEL [24]

Answer:

(1 1/2)/(1/4) = (3/2)/(1/4) = (3/2)(4) = 6 mph

Explanation:

5 0
3 years ago
Read 2 more answers
How many molecules of methane gas (CH4) are in 32.1 grams of methane
bixtya [17]

Answer:

There are 1.8021⋅1024 molecules of CH4 in 48 grams of CH4 .

Explanation:

hope it helps you

follow me for more

I'm willing to help

4 0
3 years ago
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