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2 years ago

What is the name of the ionic compound made of beryllium and chlorine?

Chemistry

1 answer:

mojhsa [17]2 years ago

5 0

Answer:

beryllium chloride

Explanation:

Therefore a compound made from beryllium and chlorine will be named beryllium chloride.

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Which identifies an oxidation-reduction reaction? a double replacement reaction a neutralization reaction a reaction in which ox

OLga [1]

A reaction in which oxidation numbers change is the answer! :D

☆ Dont forget to mark brainliest ☆

7 0

3 years ago

Read 2 more answers

A large pot (10 kg) of beef stew is left out on the kitchen counter to cool. The rate of cooling, in kJ/min, equals 1.955 (T-25)

olga_2 [115]

Answer:

16 minutes

Explanation:

First, we need to calculate the amount of heat needed to cool the beef stew:

Q = mcΔT

Where m is the mass, c is the heat capacity and ΔT is the variation of the temperature.

Q = 10x4x(40 - 90)

Q = -2000 kJ

So, the beef stew needs to lost 2000 kJ to cool.

With the initial temperature at 90ºC, the rate of cooling(r) will be:

r = 1.955x(90 - 25)

r = 127.075 kJ/min

So, to lose 2000 kJ, will be necessary:

t = Q/r

t = 2000/127.075

t = 16 minutes

5 0

3 years ago

All of the following equations are statements of the ideal gas law except

evablogger [386]

Answer:

The first equation, a. PV = nRT, is not a valid statement of the ideal gas law.

Explanation:

The basic expression for the ideal gas law is:

$pV=nRT$ .......... [Equation 1]

Where:

n is the number of moles of the gas

V is the volume occupied by the gas

p is the pressure exerted by the gas molecules

T is the temperature in absolute scale (Kelvin)

R is the Universal gas constant (0.0821 atm-liter /K-mol or the equivalents in other units)

You can perform different algebraic operations to obtain equivalent equations:

Choice b) Divide equation 1 by T and you get:

pV / T = nR, which is the choice b. from your list.

Choice c) Divide equation 1 by n × V and you get:

p/n = RT / V, which is the choice c. from your list.

Choice d) Divide equation 1 n × T and you get:

pV / (nT) = R, which is the choice d. from your list.

The choice a. p = nRTV states that p and V are in direct relation, when the ideal gas law states that p and V are inversely related, so that equation is wrong.

Conclusion: the choice a, p = nRTV, is not a statement of the ideal gas law.

3 0

3 years ago

What size container is needed to hold 7.00 mol of a gas at 342 K and 255 kPa? *

ValentinkaMS [17]

PV = nRT

I only know the valeu of R is you're using atm, so convert kPa to atm.

1 atm = 101.325 kPa

2.52 atm = 255 kPa

2.52atm(x) = 7(.0821)(342)

2.52atm(x) = 196.5

x = 78

78 liters

3 0

3 years ago

How many moles are in 2.8x10^24 atoms of silicon?

sergejj [24]

Answer:

4.6 mol Si

General Formulas and Concepts:

Atomic Structure

Reading a Periodic Table
Moles
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

[Given] 2.8 × 10²⁴ atoms Si

[Solve] moles Si

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[DA] Set up: $\displaystyle 2.8 \cdot 10^{24} \ atoms \ Si(\frac{1 \ mol \ Si}{6.022 \cdot 10^{23} \ atoms \ Si})$
[DA] Divide [Cancel like units]: $\displaystyle 4.64962 \ mol \ Si$

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

4.64962 mol Si ≈ 4.6 mol Si

6 0

2 years ago