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3 years ago

#7- pls help me ill mark you brainliest and ill give you 5 stars <3

Chemistry

2 answers:

Bond [772]3 years ago

5 0

Answer:

I think it is synthesis

s2008m [1.1K]3 years ago

4 0

Answer:

The answer is Synthesis

Explanation:

The two objects combine to make a bigger object

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Does the mass of a ball affect how far it rolls

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Yes, it depends on the size of the ball and the weight. If it's heavy and big then it'll affect how far it rolls, if it's small and has no weight then it won't really move as much

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3 years ago

Read 2 more answers

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 1.20 MJ 1

mars1129 [50]

Answer : The mass of liquid sodium needed are, $3.17\times 10^3g$

Explanation :

First we have to calculate the number of moles of liquid sodium.

$q=n\times c\times (\Delta T)$

where,

q = heat absorb = 1.20 MJ = 1.20 × 10⁶ J

n = number of moles of liquid sodium = ?

c = specific heat capacity = $30.8J/mol.K$

$\Delta T$ = change in temperature = $10.0^oC=273+10.0=283K$

Now put all the given values in the above formula, we get:

$1.20\times 10^6J=n\times 30.8J/mol.K\times 283K$

$n=137.7mol$

Now we have to calculate the mass of liquid sodium.

Molar mass of Na = 23 g/mol

$\text{Mass of Na}=\text{Moles of Na}\times \text{Molar mass of Na}$

$\text{Mass of Na}=137.7mol\times 23g/mol=3167.1g=3.17\times 10^3g$

Therefore, the mass of liquid sodium needed are, $3.17\times 10^3g$

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4 years ago

After DNA is duplicated, what is it called? What does it look like?

Rom4ik [11]

Answer:

Following DNA replication, the chromosome consists of two identical structures called (sister chromatids), which are joined at the centromere.

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3 years ago

The red and yellow diamond in a NFPA sign represents what?

Snezhnost [94]

The red diamond tells how flammable the chemical compound is or how easily it catches fire.

The yellow diamond tells about reactivity how quickly the compound reacts with other materials.

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3 years ago

B. How many moles of phosphorous pentachloride will react with 7.36 g of water?

Flura [38]

Answer:

0.102 mol

Explanation:

Step 1: Write the balanced equation

PCl₅ + 4 H₂O ⇒ 5 HCl + H₃PO₄

Step 2: Calculate the moles corresponding to 7.36 g of H₂O

The molar mass of H₂O is 18.02 g/mol.

7.36 g × 1 mol/18.02 g = 0.408 mol

Step 3: Calculate the moles of PCl₅ required to react with 0.408 moles of H₂O

The molar ratio of PCl₅ to H₂O is 1:4.

0.408 mol H₂O × 1 mol PCl₅/4 mol H₂O = 0.102 mol PCl₅

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3 years ago