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Crazy boy [7]
3 years ago
9

The chemical equation shows only the reactants and one product. How many H atoms must be present in the second product that is f

ormed?
Chemistry
1 answer:
cestrela7 [59]3 years ago
4 0

Answer: In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products. If we count the number of hydrogen atoms in the reactants and products, we find two hydrogen atoms.

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What is the molarity of a solution that contains 0.4mol KCl in 3.5L of solution?
OLga [1]

Answer:

0.1143M

Explanation:

if one 0.4moles=3.5l what about 1litre

3 0
4 years ago
When a 13.0g sample of NaOH(s) dissolves in 400.0 mL water in a coffee cup calorimeter, the temperature of the water changes fro
Tom [10]

Answer:440.154j

Explanation:

H=mcΔT

H= 13*4.18*8.1

H=440.154j

4 0
3 years ago
Which of these scenarios contains an exact number?
Vladimir79 [104]

The scenario that contains an exact number is 'A) You count 10 people in a room' (Option A).

<h3>What is the exact number?</h3>

An exact number can be considered a discrete variable because it does not involve a continuous range of values in a given measurement.

In conclusion, the scenario that contains an exact number is 'A) You count 10 people in a room' (Option A).

Learn more about discrete variables here:

brainly.com/question/16044695

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4 0
2 years ago
You have been working to develop a new fictitious compound in the lab. Determine the amount in units of moles​ [mol] of 40 grams
Serhud [2]

Answer : The moles of given compound is, 0.064 mole

Explanation : Given,

Mass of given compound = 40 g

Atomic mass of X = 50 amu

Atomic mass of Y = 45 amu

Atomic mass of Z = 10 amu

First we have to calculate the molar mass of given compound.

The given compound formula is, X_5Y_7Z_6

Molar mass of X_5Y_7Z_6 = (5 × Atomic mass of X) + (7 × Atomic mass of Y) + (6 × Atomic mass of Z)

Molar mass of X_5Y_7Z_6 = (5 × 50) + (7 × 45) + (6 × 10) = 625 g/mol

Now we have to calculate the moles of given compound.

\text{Moles of given compound}=\frac{\text{Mass of given compound}}{\text{Molar mass of given compound}}

\text{Moles of given compound}=\frac{40g}{625g/mol}

\text{Moles of given compound}=0.064mol

Thus, the moles of given compound is, 0.064 mole

6 0
4 years ago
When a runner participates in a marathon, they travel a distance of 26.2 miles. How many kilometers is
jolli1 [7]

Answer:

Around 42.2 Km

Explanation:

7 0
3 years ago
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